VOL 2
High Performance Analog ICs
Linear Low Dropout (LDO)Regulator Solutions
LINEAR LDO REGULATOR SOLUTIONS
IntroductionWe offer a broad line of high performance low dropout (LDO) linear regulators with fast
transient response, excellent line and load regulation, and very wide input voltage range
from 0.9V to 100V. Output currents range from 20mA to 10A, with positive, negative and
multiple output versions available. Many devices offer output voltage operation <0.8V and
some feature operation as low as 0V, even with a single supply. Most are stable with ceramic
output capacitors. Our PNP-based linear regulators offer reverse-input, reverse-output, and
reverse-current protection. Our LDO+™ devices include monitoring of voltage, current,
temperature and diagnostic flags that indicate fault conditions. LDO regulators can be
applied in virtually any application. For the most current product information, please visit
www.linear.com.
Contents Single Output LDO Regulators
Positive
High Voltage PNP ............................................................................................................................1
PNP .................................................................................................................................................2-3
Micropower PNP..............................................................................................................................4
NPN (2nd Generation) ......................................................................................................................6-7
NPN (1st Generation) .......................................................................................................................8
Very Low Dropout (VLDO) ................................................................................................................9
NMOS for Digital ICs ........................................................................................................................10
Radiation Hardened (RH) .................................................................................................................13
Negative
NPN .................................................................................................................................................11
Radiation Hardened (RH) .................................................................................................................13
Dual Output LDO Regulators
Positive ....................................................................................................................................................5
Positive/Negative .....................................................................................................................................11
LDO Controllers
Positive ....................................................................................................................................................12
Current Sources
Current Sources ......................................................................................................................................7
1LINEAR LDO REGULATOR SOLUTIONS
High Voltage PNP Positive Linear Regulators
PNP family features:
•Rugged and Hard to Kill
•Up to 80VIN Continuous Operation
•Low Output Voltage Noise
•Extensive Reverse Protection for Harsh Environments in Automotive, Avionics and Industrial Applications
LT3011 Actual Size Demo Board
LT3013 Actual Size Demo Board
LT3013: 250mA, 4V to 80V Low Dropout Micropower Linear Regulator with PWRGD
Dropout Voltage
Dropout Voltage
LT®3011: 50mA, 3V to 80V Low Dropout Micropower Linear Regulator with PWRGD
1µF
VIN3V TO80V
VOUT5V50mA
1µF750k
249k
1.6M
IN
SHDN
PWRGD
OUT
ADJ
CTGND
1000pF
POWER GOOD
OUTPUT CURRENT (mA)
0
250
300
350
40
200
150
10 20 30 50
100
50
0
DROP
OUT
VOLT
AGE
(mV)
OUTPUT CURRENT (mA)
0
250
300
400
350
200
200
150
50 100 150 250
100
50
0
DROP
OUT
VOLT
AGE
(mV)
LT3011
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
High Voltage PNP Positive Linear Regulators
LT3014 0.02 3.0 80 1.22 0.35 7 Adj (1.22 to 60) 115 E I TSOT-5, 3x3 DFN-8
LT3014HV 0.02 3.0 100 1.22 0.35 7 Adj (1.22 to 60) 115 E I TSOT-5, 3x3 DFN-8
LT3014B 0.02 3.0 80 1.22 0.35 7 Adj (1.22 to 60) 115 E I TSOT-5, 3x3 DFN-8
LT3014BHV 0.02 3.0 100 1.22 0.35 7 Adj (1.22 to 60) 115 E I TSOT-5, 3x3 DFN-8
LT3010 0.05 3.0 80 1.275 0.30 30 Adj (1.275 to 60), 5 100 E H MP MSOP-8E
LT3011*† 0.05 3.0 80 1.24 0.30 45 Adj (1.24 to 60) 100 E I H MSOP-12E, 3x3 DFN-10
LT3012 0.25 4.0 80 1.24 0.40 40 Adj (1.24 to 60) 100 E H TSSOP-16E, 3x4 DFN-12
LT3012B 0.25 4.0 80 1.24 0.40 40 Adj (1.24 to 60) 100 E TSSOP-16E, 3x4 DFN-12
LT3013*† 0.25 4.0 80 1.24 0.40 65 Adj (1.24 to 60) 100 E H MP TSSOP-16E, 3x4 DFN-12
LT3013B*† 0.25 4.0 80 1.24 0.40 65 Adj (1.24 to 60) 100 E TSSOP-16E, 3x4 DFN-12
* Power Good † LDO+
1µF
VIN5.4V TO80V
VOUT5V250mA
3.3µF750k
249k
1.6M
IN
PWRGD
OUT
ADJ
CTGND
1000pF
LT3013
SHDN
LINEAR LDO REGULATOR SOLUTIONS2
PNP Positive Linear Regulators
PNP family features:
•Low Output Voltage Noise
•Wide Voltage Range
•Low Dropout Voltage
•Fast Transient Response and Extensive Reverse Protection
•Precision Current Limits
LT3086 Actual Size Demo Board
LT3055 Actual Size Demo Board
LT3055: 500mA Linear Regulator with Precision Current Limit and Diagnostics
Transient Response with Cable Drop Compensation (CDC)
External Current Limit RIMAX = 604Ω
LT3086: 1.5A Rail-to-Rail, Low Dropout PNP Linear Regulator with Monitoring and Cable Drop Compensation
TEMPERATURE (°C)
–75
CURR
ENT
LIM
IT F
AULT
THR
ESHO
LD (m
A)
510
530
550
125
490
470
500
520
540
480
460
450–25 25 75–50 1500 50 100 175
VOUT(NOMINAL) = 5V
VIN = 7V
VIN = 5.6V
LT3055
IN
SHDN
TRACK
TEMP
IMON
ILIM
OUT
SET
CDC
PWRGD
RPWRGD
VPWRGD
*SEE APPLICATIONS INFORMATION FOR INDUCTANCE EFFECTS ASSOCIATED WITH RWIRE
GND
LT3086VIN6V TO15V
TO ADC0.8V AT 2.24A
FULL-SCALE
VTEMP10mV/°C
25°C = 250mV
VOUT
10µF 10µFRSET90.9k + 1.1k1%
RCDC1%
RCDC 1%
RLINE1
CABLE
RLINE2
RMON357Ω
1%
82.5k1%
100kVLOAD5V AT2.1A
LOAD
08 0 160 560 640 720 800240 320 400 480TIME (µs)
OUTP
UT V
OLTA
GE (V
)LO
ADCU
RREN
T (A
)
5.8
5.6
5.2
4.8
4.4
2
5.4
5.0
4.6
4.2
1
0
VIN = 6VRMON = 357RWIRE = 0.24RCDC = 46.4k
VOUT WITH CDC
VLOAD WITHOUT CDC
VLOAD WITH CDC
ILOAD = 0.5A TO 1.5A
3LINEAR LDO REGULATOR SOLUTIONS
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
PNP Positive Linear Regulators
LT1761 0.1 1.8 20 1.22 0.30 20 Adj (1.22 to 19.5), 1.2, 1.5, 1.8, 2, 2.5, 2.8, 3, 3.3, 5
20 E I MP TSOT-5
LT3050§ 0.1 1.6 45 0.60 0.34 45 Adj (0.6 to 44.5), 3.3, 5
30 E I MP 2x3 DFN-12, MSOP-12E
LT3060 0.1 1.6 45 0.60 0.30 40 Adj (0.6 to 44.5), 1.2, 1.5, 1.8, 2.5, 3.3, 5, 15
30 E I H MP 2x2 DFN-8, TSOT-8
LT3061# 0.1 1.6 45 0.60 0.25 45 Adj (0.6 to 19) 30 E I H MP 2x3 DFN-8, MSOP-8E
LT1020 0.125 4.5 36 2.50 0.40 40 Adj – C I SO-16, DIP-14
LT1120/A 0.125 4.5 36 2.50 0.40 40 Adj – C I SO-8, DIP-8
LT1121/A/HV 0.15 4.2 30/36 3.75 0.42 30 Adj (3.75 to 29/35), 3.3, 5
– C I SOT-223, SO-8, TO-92, DIP-8
LT1762 0.15 1.8 20 1.22 0.27 25 Adj (1.22 to 19.5), 2.5, 3, 3.3, 5
20 E MSOP-8
LT3062 0.2 1.6 45 0.60 0.30 45 Adj (0.6 to 40) 30 E I H MP 2x3 DFN-8, MSOP-8E
LT3063# 0.2 1.6 45 0.60 0.30 45 Adj (0.6 to 19) 30 E I H MP 2x3 DFN-8, MSOP-8E
LT1521 0.3 4.3 20 3.75 0.50 12 Adj (3.75 to 19), 3, 3.3, 5
– C I SOT-223, SO-8, MSOP-8
LT1579 0.3 2.7 20 1.50 0.40 50 Adj (1.5 to 19), 3, 3.3, 5
– C SO-8, SO-16, SSOP-16
LT1962 0.3 1.8 20 1.22 0.27 30 Adj (1.22 to 19.5), 1.5, 1.8, 2.5, 3, 3.3, 5
20 E MSOP-8
LT1763 0.5 1.8 20 1.22 0.30 30 Adj (1.22 to 19.5), 1.5, 1.8, 2.5, 3, 3.3, 5
20 C I MP 3x4 DFN-12, SO-8,
LT3055‡§ 0.5 2.0 45 0.60 0.35 65 Adj (0.6 to 44.5) 25 E I H MP 3x4 DFN-16, MSOP-16E
LT3065‡§ 0.5 2.0 45 0.60 0.30 55 Adj (0.6 to 44.5) 25 E I H MP 3x3 DFN-10, MSOP-12E
LT1129 0.7 4.2 30 3.75 0.40 50 Adj (3.75 to 29), 3.3, 5
– E I MP DD-Pak, SOT-223, SO-8, TO-220, TSSOP-20
LT1965 1.1 1.8 20 1.20 0.31 500 Adj (1.2 to 19.5), 1.5, 1.8, 2.5, 3.3
40 E I H 3x3 DFN-8, MSOP-8E, DD-Pak, TO-220
LT1963/A* 1.5 2.1 20 1.21 0.34 1mA Adj (1.21 to 19.5), 1.5, 1.8, 2.5, 3.3
40 E I MP TSSOP-16E, DD-Pak, TO-220, SOT-223, SO-8
LT3081†§ 1.5 1.2 36 50µA 1.21 1.1mA Adj (0 to 34.5) 27 E I H MP 4x4 DFN-12, TSSOP-16E, TO-220, DD-Pak
LT3086‡§ 2.1 1.4 40 400mV/50µA 0.33 1.2mA Adj (0.4 to 32)† 40 E I MP TSSOP-16E, 4x5 DFN-16, DD-Pak, TO-220
LT1528 3.0 3.9 15 3.30 0.60 400 Adj (3.3 to 14), 3.3 – C DD-Pak, TO-220
LT1529 3.0 3.9 15 3.75 0.60 50 Adj (3.75 to 14), 3.3, 5
– C I DD-Pak, TO-220
LT1764/A* 3.0 2.7 20 1.21 0.34 1mA Adj (1.21 to 19.5), 1.5, 1.8, 2.5, 3.3
40 E MP DD-Pak, TO-220, TSSOP-16E
*“A” Versions are stable with ceramic capacitors † Single-Resistor VOUT Set ‡ Power Good # Active Discharge § LDO+
LINEAR LDO REGULATOR SOLUTIONS4
Micropower PNP Positive Linear Regulators
Micropower PNP family features:
•Sub-5µA Quiescent Current
•Good Output Noise Performance
•Keep Alive, Real-Time Clock and Remote Monitoring Applications
LT3008 Actual Size Demo Board
LT3009: 3µA IQ, 20mA Low Dropout Linear Regulator
Dropout Voltage/Quiescent Current
Dropout Voltage/Quiescent Current
LT3007: 3µA IQ, 20mA, 45V Low Dropout Fault Tolerant Linear Regulator
IN
SHDN
1µF
OUTVIN3.75V TO
20V
GND
VOUT 3.3V20mA
1µF
TEMPERATURE (°C)
DROP
OUT
VOLT
AGE
(mV)
QUIESCENT CURRENT (µA)
400
200
100
50
0
500
300
250
150
5
350
2
3
1
0
6
450
4
ILOAD = 20mADROPOUTVOLTAGE
IQ
TEMPERATURE (°C)
DROP
OUT
VOLT
AGE
(mV)
QUIESCENT CURRENT (µA)
400
200
100
50
0
500
300
250
150
4.0
350 3.5
2.0
1.0
0.5
0
5.0
450 4.5
3.0
2.5
1.5
IQ
ILOAD = 20mA
DROPOUTVOLTAGE
LT3009-3.3
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
Micropower PNP Positive Linear Regulators
LT3009 0.02 1.6 20 0.60 0.28 3 Adj (0.6 to 19.5), 1.2, 1.5, 1.8, 2.5, 3.3, 5
150 E I SC70-8, 2x2 DFN-6
LT3007* 0.02 2.0 45 0.60 0.30 3 Adj (0.6 to 44.5), 1.2, 1.5, 1.8, 2.5, 3.3, 5
92 E I TSOT-8
LT3008 0.02 2.0 45 0.60 0.30 3 Adj (0.6 to 44.5), 1.2, 1.5, 1.8, 2.5, 3.3, 5
92 E I MP TSOT-8, 2x2 DFN-6
*FMEA Fault Tolerant version
-50 -25 0 25 50 75 100 125 150
-50 -25 0 25 50 75 100 125 150
IN
SHDN
2.2µF
OUT
SENSE
VIN3.8V TO
45V
GND
LT3007-3.3
VOUT 3.3V20mA
1µF
5LINEAR LDO REGULATOR SOLUTIONS
10µF 10µF
10µF
0.01µF
0.01µF10µF
5.4V TO20V
5V OUT AT 150mA20µVRMS NOISE
–5V OUT AT –150mA30µVRMS NOISE
–5.4V TO–20V
<0.25V = OFF>2V = ON SHDNP
SHDNN
OUTPINP
INN
BYPP
GND
BYPN
OUTN
LT3032-5
Dual Output PNP Linear Regulators
Dual linear regulator family features:
•Highly Compact Solution
•All the Performance Features of our Single PNP Regulators
• Ideal for Core/Logic Combinations
LT3030 Actual Size Demo Board
LT3032 Actual Size Demo Board
LT3032: Dual 150mA Positive/Negative Low Noise Regulator
Dropout Voltage vs Load Current
10Hz to 100kHz Output Noise
LT3030: Dual 750mA/250mA Low Dropout, Low Noise Micropower Linear Regulator
OUTP 100µV/DIV 20µVRMS
30µVRMS
OUTN 100µV/DIV
1mS/DIV
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
Dual Output Positive Linear Regulators
LT3023 0.1/0.1 1.8 20 1.22 0.30 40 Adj (1.22 to 20) 20 E I MSOP-10E, 3x3 DFN-10
LT3027 0.1/0.1 1.8 20 1.22 0.30 50 Adj (1.22 to 20) 20 E I MSOP-10E, 3x3 DFN-10
LT3024 0.1/0.5 1.8 20 1.22 0.30 60 Adj (1.22 to 20) 20 E I TSSOP-16E, 3x4 DFN-12
LT3028 0.1/0.5 1.8 20 1.22 0.30 60 Adj (1.22 to 20) 20 E I TSSOP-16E, 3x5 DFN-16
LT3029 0.5/0.5 1.8 20 1.215 0.30 110 Adj (1.215 to 19.5) 20 E I H MP MSOP-16E, 3x4 DFN-16
LT3030* 0.75/0.25 1.7 20 1.22 0.30 195 Adj (1.22 to 19.5) 20 E I H MP 4x5 QFN-28, TSSOP-20E
Dual Output Positive and Negative Linear Regulators
LT3032 ±0.15 ±1.8 ±20 ±1.22 0.30/-0.34 60 Adj, ±3.3, ±5, ±12, ±15 20 / 30 E I MP 3x4 DFN-14
* Power Good
DROP
OUT
VOLT
AGE
(mV)
OUTPUT CURRENT (mA)0
500
450
400
350
300
250
200
150
100
50
0450150 750300 60037575 675225 525
OUT1
TJ = 25°C
OUT2
GND
1M
IN1
IN2
SHDN1
SHDN2
PWRGD1
PWRGD2
OUT1
BYP1
ADJ1
OUT2
BYP2
ADJ2
1M
3.3µF 10µF
3.3µF
10nF
VIN2.5V
VOUT11.8V750mA
VOUT21.5V250mA
113k1%
237k1%
10nF54.9k1%
237k1%
LT3030
LINEAR LDO REGULATOR SOLUTIONS6
LT3081 Actual Size Demo Board
Single Resistor Set, Current Reference-Based NPN/PNP Positive Linear Regulators
Second generation NPN family features:
•Operation Down to 0V Output
•Direct Paralleling to Spread PCB Heat
•Low Noise and Simplicity with a Single Resistor VOUT Set Capability
•Always Operates in Unity-Gain
— Bandwidth Independent of Output Voltage
— Output Noise Independent of Output Voltage
— Load Regulation Independent of Output Voltage
LT3083: Adjustable 3A Single Resistor Low Dropout Regulator
VCONTROL
OUTIN
SET RMIN909
*10µF10µF
VOUT = 0.9VIMAX = 3A
VIN1.5V
4.7µF
VCONTROL3.3V
RSET18.2k1%
0.1µF
*OPTIONAL FOR MINIMUM 1mA LOAD REQUIREMENT
Ω
LT3083
LT3083 Actual Size Demo Board
LT3081: Wide Safe Operating Area (SOA)
LT3080 Actual Size Demo Board
LT3081: 1.5A Single Resistor Rugged Linear Regulator with Monitors
LT3081IncreasedSafe Area
IN
1k 6.04k
10µF*
*OPTIONAL
IMON ILIM
OUT
+–
LT3081
ILOAD/5000
IOUT1.5V1.5A
VIN
300 *
1k
1µA/°C
SET
30.1k
TEMP
50µA
Ω
Older Regulator
Older Regulator
0 5 10 15 20 25 30 35 40
Curr
ent L
imit
(A)
3.0
2.5
2.0
1.5
1.0
0.5
0
Input-to-Output Differential Voltage (V)
7LINEAR LDO REGULATOR SOLUTIONS
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Current (µA)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) w/ CSET
Temperature Grade Package
0V Output Capable, Single-Resistor Set, Current Reference-Based NPN Positive Linear Regulators
LT3082 § 0.2 1.2 40 10 1.30 500μA Adj (0 to 38.5) 33 E I MP 3x3 DFN-8, TSOT-23-8, SOT-223
LT3085 0.5 1.2 36 10 0.275‡ 1mA Adj (0 to 35.7) 33 E I MP 2x3 DFN-6, MSOP-8E
LT3080 1.1 1.2 36 10 0.35‡
(1.35, SOT-223)1mA Adj (0 to 35.7) 40 E I 3x3 DFN-8, MSOP-8E, SOT-223,
TO-220, DD-Pak
LT3080-1* 1.1 1.2 36 10 0.35‡ 1mA Adj (0 to 35.7) 40 E I 3x3 DFN-8, MSOP-8E
LT3081#¤ 1.5 1.2 36 50 1.23 1.1mA Adj (0 to 34.5) 40 E I 4x4 DFN-12, TSSOP-16E, TO-220, DD-Pak
LT3086#§¤ 2.1 1.4 40 50 0.33 1.2mA Adj (0.4 to 32) 40 E I MP 4x5 DFN-16, TSSOP-16E, TO-220, DDPak
LT3083 3 1.2 8/18† 50 0.31‡ 1mA Adj (0 to 7.5 or 0 to 17.5†) 40 E I MP 4x4 DFN-12, TSSOP-16E, TO-220, DD-Pak
* Integrated Ballast Resistor † DD-Pak and TO-220 Packages ‡ Dual-Supply Operation #Power Good § PNP pass transistor ¤ LDO+
Part Number
Output Current Range (mA)
Initial Accuracy (%)
Min VIN (V)
Max VIN (V)
Current Regulation (ppm/V)
Quiescent Current (µA)
Reverse Voltage Protection
Reverse Current Protection
Current Limiting
Thermal Protection
Temperature Grade Package
Current Sources
LM334 1µA to 10mA 3 0.8 40 200 280 — yes — — C T0-92, SO-8
LT3092 0.5 to 200 1 1.2 40 <10 300 yes yes yes yes E I MP TSOT-8, SOT-223, 3x3 DFN-8
LINEAR LDO REGULATOR SOLUTIONS8
OUTPUT CURRENT (A)0IN
PUT/
OUTP
UT D
IFFE
RENT
IAL
(V)
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5IFULL LOAD
VIN 4.75V
C110µF
* REQUIRED FOR STABILITY LT1584: C2 = 22µF, LT1585/LT1587: C2 = 10µF
3.3V7A, 4.6A, 3A
C2*SOLIDTANTALUM
++≥
NPN Positive Linear Regulators
First generation NPN positive linear regulator family:
•Based on Classic 3-Terminal Architecture
•Wide Input Voltage
•Wide Output Voltage
Dropout Voltage vs Output Current
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (mA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
NPN Positive Linear Regulators
LT1117 0.8 2.5 15 1.25 1.20 5 Adj, 2.85, 3.3, 5 0.003% C I DD-Pak, SOT-223
LT1118 –0.4/0.8 3.0 15 1.225 1.00 0.6 Adj, 2.5, 2.85, 5 – C SO-8, SOT-223
LT1086 1.5 2.6 25 1.25 1.30 5 Adj, 2.85, 3.3, 3.6, 5, 12 0.003% C I DD-Pak, TO-220
LT1085 3 2.6 30 1.25 1.30 5 Adj, 3.3, 3.6, 5, 12 0.003% C I DD-Pak, TO-220, TO-3P
LT1587 3 2.7 7 1.25 1.20 8 Adj, 1.5, 3.3, 3.38, 3.45, 3.6 0.003% C DD-Pak, TO-220
LT1585 4.6 2.4 7 1.25 1.10 8 Adj, 1.5, 3.3, 3.38, 3.45, 3.6 0.003% C DD-Pak, TO-220
LT1585A 5 2.5 7 1.25 1.20 8 Adj, 1.5, 3.3 0.003% C DD-Pak, TO-220
LT1084 5 2.6 30 1.25 1.30 5 Adj, 3.3, 3.6, 5, 12 0.003% C I DD-Pak, TO-220, TO-3P
LT1584 7 2.5 7 1.25 1.25 8 Adj, 3.3, 3.38, 3.45, 3.6 0.003% C I DD-Pak, TO-220
LT1580 7 1.8* 6 1.25 0.54‡ 10 Adj, 2.5 – C I DD-Pak, TO-220
LT1083 7.5 2.6 30 1.25 1.30 5 Adj, 3.3, 3.6, 5, 12 0.003% C DD-Pak, TO-220
LT1581 10 1.7* 6 1.25 0.43‡ 10 Adj, 2.5 – C TO-220
* Dual-Supply Operation
LT1584-3.3 LT1585-3.3 LT1587-3.3
LT®1584/5A/7: Low Dropout Fast Response Positive Regulator Adjustable & Fixed
9LINEAR LDO REGULATOR SOLUTIONS
BIAS0.1µF
1.5V
1µF
0.1µF
Li-IonOR
3-CELLNiMH
IN
SHDN
OUTVOUT = 1.2VIOUT 500mA
SENSE
GNDOFF ON
1.5V HIGHEFFICIENCY
DC/DCBUCK
≤
IN10µF
VIN1.2V
VOUT0.9V1A
SHDN
6981%
2001%
OUT
ADJ
GND
10µF
Very Low Dropout (VLDO) Positive Linear Regulators
VLDO™ regulator family features:
• Input Voltage Operation Down to 0.9V
•Output Voltage Down to 0.2V
•Typical Dropout Performance ≤ 150mV Enabling low VIN-to-VOUT Differential Applications
LTC3025-x Actual Size Demo Board
LT3022 Actual Size Demo Board
LTC®3025-x: 500mA Positive Low Noise LDO Regulator
Minimum Input Voltage
1MHz VIN Supply Rejection
LT3022: 1A, 0.9V to 10V, Very Low Dropout Linear Regulator
TEMPERATURE (°C)–50
MIN
IMUM
INPU
T VO
LTAG
E (V
)
0.3
0.9
1.0
1.1
0 50 75
0.1
0.7
0.5
0.2
0.8
0
0.6
0.4
–25 25 100 125
IL = 1A
VIN (V)1.2
0
REJE
CTIO
N (d
B)
5
15
20
25
50
35
1.6 2.0 2.2
10
40
45
30
1.4 1.8 2.4 2.6
BIAS = 3.6VVOUT = 1.2V
IOUT = 100mAIOUT = 300mA
COUT = 1µF
COUT = 10µF
LT3022
LTC3025-2
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
VLDO Positive Linear Regulators
LT3020 0.1 0.9 10 0.20 0.15 120 Adj (0.2 to 9.5), 1.2, 1.5, 1.8
245 E I MSOP-8, 3x3 DFN-8
LTC1844 0.15 1.6 6.5 1.25 0.11 35 Adj (1.25 to 6), 1.5, 1.8, 2.5, 2.8, 3.3
60 E TSOT-5
LTC3025 0.3 0.9 5.5 0.40 0.045 54 Adj (0.4 to 3.6) 80 E 2x2 DFN-6
LTC3035 0.3 1.7 5.5 0.40 0.05 100 Adj (0.4 to 3.6) 150 E 2x3 DFN-8
LT3021 0.5 0.9 10 0.20 0.16 120 Adj (0.2 to 9.5), 1.2, 1.5, 1.8
300 E I 5x5 DFN-16, SO-8
LTC3025-x 0.5 0.9 5.50 0.40 0.08 54 Adj (0.4 to 3.6), 1.2, 1.5, 1.8
80 E I 2x2 DFN-6
LT3022 1.0 0.95 10 0.20 0.15 400 Adj (0.2 to 9.5), 1.2, 1.5, 1.8
165 E I 3x5 DFN-16, TSSOP-16E
LTC3026‡ 1.5 1.14 3.5/5.5 0.40 0.10 400# Adj (0.4 to 2.6) 110* or 210† E I 3x3 DFN-10, MSOP-10E
* Boost Disabled † Boost Enabled ‡ LDO+ # VIN = 3.5V
LINEAR LDO REGULATOR SOLUTIONS10
NMOS Positive Linear Regulators for Digital IC Power
Our family of NMOS positive linear regulators has the performance demanded by modern high current, low voltage digital ICs:
•Ultrafast Transient Response
•Very Low Dropout Voltage
•High Output Current
•Low Output Voltage
•Good Power Supply Rejection Ratio (PSRR)
•VIOC—Control of Upstream Buck Regulator for VIN to VOUT Regulation across LT3070/71
LT3071: 5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator with Analog Margining
Dropout Voltage
Transient Load Response
LT3070: 5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator
BIAS
50k
IN
EN
VO0
VO1
330µF
2.2µF
2.2µF*
0.01µF1nF
4.7µF*
*X5R OR X7R CAPACITORS
10µF*
PWRGD
VOUT0.9V5A
VO2
MARGSEL
MARGTOL
VIOC
SENSE
OUT
VBIAS2.2V TO 3.6V
VIN1.2V PWRGD
REF/BYPGND
BIAS
50k
IN
EN
VO0
VO1
330µF
2.2µF
2.2µF*
0.01µF1k
*X5R OR X7R CAPACITORS
1nF
NC
4.7µF* 10µF*
PWRGD
VOUT0.9V5A
VMON2V AT 5AFULL SCALE
VO2
MARGA VIOC
SENSE
OUT
VBIAS2.2V TO 3.6V
VIN1.2V PWRGD
REF/BYPIMON
GND
OUTPUT CURRENT (A)
0
90
120
150
4
60
30
01 2 3 5
VOUT = 1.8VVBIAS = 3.3V
VOUT = 0.8VVBIAS = 2.5V
VIN = VOUT(NOMINAL)
LT3070
LT3071
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
NMOS Positive Linear Regulators
LT3070*‡# 5 0.95 3 0.6 0.09 1.1mA Adj (0.8 to 1.8) 25 E I MP 4x5 QFN-28
LT3071†‡ 5 0.95 3 0.6 0.09 1.1mA Adj (0.8 to 1.8) 25 E I MP 4x5 QFN-28
LT3072‡§ 2.5/2.5 0.9 4 0.6 0.085 1.5/1.5mA Adj (0.6 to 3.3) 20 E I MP 4x7 QFN-36, TSSOP-38E
* Digital Margining † Analog Output Margining ‡ LDO+ #Power Good § Future product, contact factory for information.
VOUT50mV/DIV
AC-COUPLED
IOUT2A/DIV
I = 500mATO 5A
20µs/DIVVOUT = 1VCOUT = 10µF + 4.7µF + 2.2µFIOUT tRISE/tFALL = 100ns
LT3070 Actual Size Demo Board
DROP
OUT
VOLT
AGE
(mV)
11LINEAR LDO REGULATOR SOLUTIONS
Negative Linear Regulators
Rugged and hard to kill negative linear regulator family features:
•Low Output Voltage Noise
•Wide Voltage Range
•Low Dropout Voltage
•Reverse Output Protection
LT3090 Actual Size Demo Board
LT3090: 36V, 600mA Negative Linear Regulator with Programmable Current Limit
Dropout Voltage
Output Noise: 10Hz to 100kHz
LT3015: 1.5A, Low Noise, Negative LDO Regulator with Precision Current Limit
GND
SHDN ADJ
IN OUT
10µF 10µF
3.48k1%
10.5k1%VIN
–5.5V TO –30V
VOUT–5V –1.5A
LT3015
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
Negative Linear Regulators
LT1964 0.2 –1.9 –20 –1.22 0.34 30 Adj, –5 30 E I TSOT-5, 3x3 DFN-8
LT1175 0.5 –4.3 –20 –3.8 0.50 45 Adj, –5 134 C I MP SOT-223, SO-8, DIP-8, DD-Pak, TO-220
LT3090* 0.6 –1.5 –36 50µA 0.30 1mA Adj (0 to –32) 18 E I H MP 3x3 DFN-12, MSOP-12E
LT3015 1.5 –1.8 –30 –1.22 0.31 1.1mA Adj (–1.22 to –30) 60 E I MP DD-Pak, TO-220, MSOP-12E, 3x3 DFN-8
LT1185 3.0 –4.3 –35 –2.37 0.67 2.5mA Adj (–2.37 to –30) 49 C I DD-Pak, TO-220
Dual Output Positive and Negative Linear Regulators
LT3032 ±0.15 ±1.9 ±20 ±1.22 0.30/-0.34 55 Adj, ±3.3, ±5, ±12, ±15
20 / 30 E I MP 3x4 DFN-14
* LDO+
LOAD CURRENT (mA)
00
DROP
OUT
VOLT
AGE
(V)
0.05
0.15
0.20
0.25
–1000
0.45
0.10
–500–250 –1250–750 –1500
0.30
0.35
0.40TJ = 25°C
VIN: –3.5V VOUT: –2VCOUT: 4.7µF, CSET: 0.1µFIL: 600mA
VOUT100µV/DIV
1ms/DIV
LT3090VOUT–2.5VMAX IOUT600mA
SET GND
ILIMSHDN
–
+
50µA
IMONP OUT
IMONN
0.1µF
4.7µF
49.9k3.32k
TO ADC (IMON)
INVIN–3V TO
–10V
10k
3.3V
4.7µF
0.1µF
LINEAR LDO REGULATOR SOLUTIONS12
Linear Regulator Controllers
Linear regulator controller family features:
•An Off-Board Power Device
•Reduced On-Chip Power Dissipation
•Spreads Heat More Evenly on a PC Board
LT3150 Actual Size Demo Board
LT1573: Low Dropout Regulator Controller
Transient Response for 0.1A to 4A Output Load Step
Transient Response for 0.2A to 5A Output Load Step
LT3150: Fast Transient Response, Low Input Voltage, LDO Controller
Part Number
Output Current (A)
Min VIN (V)
Max VIN (V)
Reference Voltage (V)
Dropout Voltage (V@IOUT)
Typ IQ (Supply) (μA)
Output Voltage (V)
Noise (µVRMS) or % of VOUT
Temperature Grade Package
Discrete Pass Element Drivers and Regulators—Very Low Dropout
LT1123 3 n/a 30 5 –* 700 5 – C SOT-223, TO-92
LT1573 5* 2.8 10 1.265 –* 1.7mA Adj, 2.5, 2.8, 3.3 – C I SO-8
LT3150 10* 1.4 10 1.23 0.13 12mA Adj – C SSOP-16
LT1575 –* n/a 22 1.21 –* 12mA Adj, 1.5, 2.8, 3.3, 5 – C DIP-8, SO-8
LT1577 –* n/a 22 1.21 –* 12mA Adj, 2.8, 3.3 – C SO-16
* Depends On Selection of External Pass Device
+
VIN2FB1SHDN2SWGNDGNDGND
SWVIN1
SHDN1IPOSINEG
GATEFB2
COMP
MBR0520L
L110µH
1.5k
CIN: PANASONIC SP SERIES EEFUE0E221R 20%C1: AVX TAJA475M020R 20V 20%L1: MURATA LQH32CN100K11 OR SUMIDA CDRH3D16100
2431%
10201%
C14.7µF
+ CIN220µF2.5Vx2
VIN1.8V
VOUT1.5V4A
6.19k1%
1.37k1%
Si4410
2.2µF x10X5R CERAMIC0805 CASE
5.1
6800pF 50pF
LT3150
50µV/DIV
2A/DIV
20μS/DIV
50µV/DIV
2.5A/DIV
10μS/DIV
+
COMP
VOUT
VIN
DRIVE
FB
LATCH
SHDN
GND
LT1573
CTIME
COUT2220FTANT
COUT11FCERX 24
CC100pF
VIN5V
RC1k
RD24
VOUT3.3V
GND
RB50
R11.6k
R21k
LOAD+ +
QOUTMOTOROLAD45H11
VOUT = 1.265V (1 + R1/R2)FOR T < 45C, COUT1 = 24 x 1F Y5V CERAMIC SURFACE MOUNT CAPACITORS.FOR T > 45C, COUT1 = 24 x 1F X7R CERAMIC SURFACE MOUNT CAPACITORS.PLACE COUT1 IN THE MICROPROCESSOR SOCKET CAVITY
CIN100FTANT
13LINEAR LDO REGULATOR SOLUTIONS
Radiation Hardened (RH) Linear Regulators
Linear Technology manufactures a broad range of rugged radiation tolerant (rad hard) voltage regulators that are ideal for space and military applications. We also partner with several outside vendors to provide monolithic packaged and hybrid products of Linear Technology RH DICE.
ReferencesRobert Dobkin, New Linear Regulators Solve Old Problems,
Linear Technology Corporation, Application Note 142, August 2013
Jim Williams, Load Transient Response Testing for Voltage Regulators, Linear Technology Corporation, Application Note 104, October 2006.
Jim Williams, Minimizing Switching Regulator Residue in Linear Regulator Outputs, Linear Technology Corporation, Application Note 101, July 2005.
Todd Owen and Jim Williams, Performance Verification of Low Noise, Low Dropout Regulators, Linear Technology Corporation, Application Note 83, March 2000.
Craig Varga, LT1575 Ultrafast Linear Controller Makes Fast Transient Response Power Supplies, Linear Technology Corporation, Application Note 69, September 1996 (see Appendix A, Using PCB Material as Low Value Resistors).
Goran Perica, Ceramic Input Capacitors Can Cause Overvoltage Transients, Linear Technology Corporation, Application Note 88, March 2001.
Bill Roehr, Mounting Considerations for Power Semiconductors, ON Semiconductor, Application Note 1040/D, May 2001.
Tom Gross, LDO Linear Regulators Rival Switchers for Efficiency, Linear Technology Corporation, Linear Technology Magazine, May 2005.
LT1963A 1.5A, Low Noise, Fast Transient Response LDO Regulator data sheet, Linear Technology Corporation.
All reference materials listed above are available at www.linear.com
Videos / Video Product Briefs LT3009 LT3015 LT3070/71 LT3080 LT3081 LT3086 LT3090 LT3092
All videos listed above are available at www.linear.com/solutions/video
Part Number Polarity Output Current (A) Max. VIN (V) Reference Voltage (Adj.) Package
Radiation Hardened (Rad Hard or RH) Linear Regulators
RH1084 Positive 5 25 1.25V TO-3
RH1086M Positive 0.5/1.5 25 1.25V Dice, TO–3, TO–39
RH117 Positive 0.5/1.5 40 1.25V Dice, TO–3, TO–39
RH137 Negative 1.5 –30 –1.25V Dice, TO–3, TO–39
RH1573 Positive 5 10 1.265V Dice
RH1185 Negative 3 –35 –2.37V Dice
RH3080* Positive 1 35 10uA Dice
RH3083* Positive 3 23 50µA Dice
* Current Source Reference
Linear Technology Corporation1630 McCarthy Blvd. Milpitas, CA 95035-7417 • Tel: 408-432-1900 • www.linear.com CF061410KU
Sales Of f ices
25%
, Linear Technology, LT, LTC, and the Linear logo are registered trademarks and LDO+ and VLDO are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. © 2014 Linear Technology Corporation.
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