LT3009 Series
1
3009fc
TEMPERATURE (°C)
DROPOUT VOLTAGE (mV)
QUIESCENT CURRENT (μA)
400
3009 TA01b
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
–50 –25 0 25 50 75 100 125 150
ILOAD = 20mA
DROPOUT
VOLTAGE
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
3
µ
A IQ, 20mA
Low Dropout Linear Regulators
The LT
®
3009 Series are micropower, low dropout voltage
(LDO) linear regulators. The devices supply 20mA output
current with a dropout voltage of 280mV. No-load quiescent
current is 3μA. Ground pin current remains at less than
5% of output current as load increases. In shutdown,
quiescent current is less than 1μA.
The LT3009 regulators optimize stability and transient
response with low ESR ceramic capacitors, requiring a
minimum of only 1μF. The regulators do not require the
addition of ESR as is common with other regulators.
Internal protection circuitry includes current limiting,
thermal limiting, reverse-battery protection and reverse-
current protection.
The LT3009 Series are ideal for applications that require
moderate output drive capability coupled with ultralow
standby power consumption. The device is available in
fi xed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V,
and as an adjustable device with an output voltage range
down to the 600mV reference. The LT3009 is available in
the 6-lead DFN and 8-lead SC70 packages.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
3.3V, 20mA Supply with Shutdown
n Ultralow Quiescent Current: 3μA
n Input Voltage Range: 1.6V to 20V
n Output Current: 20mA
n Dropout Voltage: 280mV
n Adjustable Output (VADJ = VOUT(MIN) = 600mV)
n Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V,
3.3V, 5V
n Output Tolerance: ±2% Over Load, Line and Temperature
n Stable with Low ESR, Ceramic Output Capacitors
(1μF minimum)
n Shutdown Current: <1μA
n Current Limit Protection
n Reverse-Battery Protection
n Thermal Limit Protection
n 8-Lead SC70 and 2mm × 2mm DFN Packages
n Low Current Battery-Powered Systems
n Keep-Alive Power Supplies
n Remote Monitoring
Utility Meters
Hotel Door Locks
IN
SHDN
1μF
3009 TA01a
OUT
VIN
3.75V TO
20V
GND
LT3009-3.3
VOUT
3.3V
20mA
1μF
Dropout Voltage/Quiescent Current
LT3009 Series
2
3009fc
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
IN Pin Voltage .........................................................±22V
OUT Pin Voltage ......................................................±22V
Input-to-Output Differential Voltage ........................±22V
ADJ Pin Voltage ......................................................±22V
SHDN Pin Voltage (Note 8) .....................................±22V
Output Short-Circuit Duration .......................... Indefi nite
(Note 1)
TOP VIEW
GND
SHDN
IN
ADJ/NC*
OUT
OUT
DC PACKAGE
6-LEAD (2mm s 2mm) PLASTIC DFN
4
5
7
6
3
2
1
TJMAX = 125°C, θJA = 65°C/W TO 85°C/W**
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
SHDN 1
GND 2
GND 3
GND 4
8 NC
7 ADJ/NC*
6 OUT
5 IN
TOP VIEW
SC8 PACKAGE
8-LEAD PLASTIC SC70
TJMAX = 125°C, θJA = 75°C/W TO 95°C/W**
Operating Junction Temperature Range (Notes 2, 3)
(E, I Grades) ......................................–40°C to 125°C
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature: Soldering, 10 sec
SC8 Package Only .............................................300°C
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3009EDC#PBF LT3009EDC#TRPBF LCQX 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC#PBF LT3009IDC#TRPBF LCQX 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-1.2#PBF LT3009EDC-1.2#TRPBF LDTW 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-1.2#PBF LT3009IDC-1.2#TRPBF LDTW 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-1.5#PBF LT3009EDC-1.5#TRPBF LDVB 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-1.5#PBF LT3009IDC-1.5#TRPBF LDVB 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-1.8#PBF LT3009EDC-1.8#TRPBF LDKC 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-1.8#PBF LT3009IDC-1.8#TRPBF LDKC 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-2.5#PBF LT3009EDC-2.5#TRPBF LDTY 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-2.5#PBF LT3009IDC-2.5#TRPBF LDTY 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-3.3#PBF LT3009EDC-3.3#TRPBF LDKD 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-3.3#PBF LT3009IDC-3.3#TRPBF LDKD 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-5#PBF LT3009EDC-5#TRPBF LDKF 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-5#PBF LT3009IDC-5#TRPBF LDKF 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
* The ADJ pin is not connected in fi xed output voltage versions.
** See the Applications Information section.
LT3009 Series
3
3009fc
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3009ESC8#PBF LT3009ESC8#TRPBF LCQY 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-1.2#PBF LT3009ESC8-1.2#TRPBF LDTX 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-1.5#PBF LT3009ESC8-1.5#TRPBF LDVC 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-1.8#PBF LT3009ESC8-1.8#TRPBF LDKG 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-2.5#PBF LT3009ESC8-2.5#TRPBF LDTZ 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-3.3#PBF LT3009ESC8-3.3#TRPBF LDKH 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-5#PBF LT3009ESC8-5#TRPBF LDKJ 8-Lead Plastic SC70 –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3009EDC LT3009EDC#TR LCQX 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC LT3009IDC#TR LCQX 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-1.2 LT3009EDC-1.2#TR LDTW 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-1.2 LT3009IDC-1.2#TR LDTW 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-1.5 LT3009EDC-1.5#TR LDVB 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-1.5 LT3009IDC-1.5#TR LDVB 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-1.8 LT3009EDC-1.8#TR LDKC 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-1.8 LT3009IDC-1.8#TR LDKC 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-2.5 LT3009EDC-2.5#TR LDTY 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-2.5 LT3009IDC-2.5#TR LDTY 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-3.3 LT3009EDC-3.3#TR LDKD 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-3.3 LT3009IDC-3.3#TR LDKD 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009EDC-5 LT3009EDC-5#TR LDKF 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009IDC-5 LT3009IDC-5#TR LDKF 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C
LT3009ESC8 LT3009ESC8#TR LCQY 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-1.2 LT3009ESC8-1.2#TR LDTX 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-1.5 LT3009ESC8-1.5#TR LDVC 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-1.8 LT3009ESC8-1.8#TR LDKG 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-2.5 LT3009ESC8-2.5#TR LDTZ 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-3.3 LT3009ESC8-3.3#TR LDKH 8-Lead Plastic SC70 –40°C to 125°C
LT3009ESC8-5 LT3009ESC8-5#TR LDKJ 8-Lead Plastic SC70 –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi
cations, go to: http://www.linear.com/tapeandreel/
ORDER INFORMATION
LT3009 Series
4
3009fc
PARAMETER CONDITIONS MIN TYP MAX UNITS
Operating Voltage l1.6 20 V
Regulated Output Voltage (Note 4) LT3009-1.2: VIN = 1.7V, ILOAD = 100μA
1.7V < VIN < 20V, 1μA < ILOAD < 20mA l
1.188
1.176
1.2
1.2
1.212
1.224
V
V
LT3009-1.5: VIN = 2V, ILOAD = 100μA
2V < VIN < 20V, 1μA < ILOAD < 20mA l
1.485
1.470
1.5
1.5
1.515
1.530
V
V
LT3009-1.8: VIN = 2.3V, ILOAD = 100μA
2.3V < VIN < 20V, 1μA < ILOAD < 20mA l
1.782
1.764
1.8
1.8
1.818
1.836
V
V
LT3009-2.5: VIN = 3V, ILOAD = 100μA
3V < VIN < 20V, 1μA < ILOAD < 20mA l
2.475
2.45
2.5
2.5
2.525
2.55
V
V
LT3009-3.3: VIN = 3.8V, ILOAD = 100μA
3.8V < VIN < 20V, 1μA < ILOAD < 20mA l
3.267
3.234
3.3
3.3
3.333
3.366
V
V
LT3009-5: VIN = 5.5V, ILOAD = 100μA
3.8V < VIN < 20V, 1μA < ILOAD < 20mA l
4.950
4.900
5
5
5.050
5.100
V
V
ADJ Pin Voltage (Notes 3, 4) VIN = 1.6V, ILOAD = 100μA
1.6V < VIN < 20V, 1μA < ILOAD < 20mA l
594
588
600
600
606
612
mV
mV
Line Regulation (Note 3) LT3009-1.2: ΔVIN = 1.7V to 20V, ILOAD = 1mA
LT3009-1.5: ΔVIN = 2.0V to 20V, ILOAD = 1mA
LT3009-1.8: ΔVIN = 2.3V to 20V, ILOAD = 1mA
LT3009-2.5: ΔVIN = 3.0V to 20V, ILOAD = 1mA
LT3009-3.3: ΔVIN = 3.8V to 20V, ILOAD = 1mA
LT3009-5: ΔVIN = 5.5V to 20V, ILOAD = 1mA
LT3009: ΔVIN = 1.6V to 20V, ILOAD = 1mA
l
l
l
l
l
l
l
0.8
1.0
1.2
1.7
2.2
3.3
0.4
3.0
3.8
4.5
6.3
8.3
12.5
1.5
mV
mV
mV
mV
mV
mV
mV
Load Regulation (Note 3) LT3009-1.2: VIN = 1.7V, ILOAD = 1μA to 20mA
LT3009-1.5: VIN = 2V, ILOAD = 1μA to 20mA
LT3009-1.8: VIN = 2.3V, ILOAD = 1μA to 20mA
LT3009-2.5: VIN = 3V, ILOAD = 1μA to 20mA
LT3009-3.3: VIN = 3.8V, ILOAD = 1μA to 20mA
LT3009-5: VIN = 5.5V, ILOAD = 1μA to 20mA
LT3009: VIN = 1.6V, ILOAD = 1μA to 20mA
l
l
l
l
l
l
l
1.4
1.8
2.1
2.9
3.9
5.8
0.7
6
7.5
9.0
12.5
16.5
25
3
mV
mV
mV
mV
mV
mV
mV
Dropout Voltage
VIN = VOUT(NOMINAL) (Notes 5, 6)
ILOAD = 100μA
ILOAD = 100μA l
115 180
250
mV
mV
ILOAD = 1mA
ILOAD = 1mA l
170 250
350
mV
mV
ILOAD = 10mA
ILOAD = 10mA l
250 310
410
mV
mV
ILOAD = 20mA
ILOAD = 20mA l
280 350
450
mV
mV
Quiescent Current (Notes 6, 7) ILOAD = 0μA
ILOAD = 0μA l
3
6
μA
μA
GND Pin Current
VIN = VOUT(NOMINAL) + 0.5V (Notes 6, 7)
ILOAD = 0μA
ILOAD = 100μA
ILOAD = 1mA
ILOAD = 10mA
ILOAD = 20mA
l
l
l
l
l
3
6
23
200
450
6
12
50
500
1000
μA
μA
μA
μA
μA
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TJ = 25°C. (Note 2)
LT3009 Series
5
3009fc
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3009 regulators are tested and specifi ed under pulse load
conditions such that TJ ≈ TA. The LT3009E is 100% tested at TA = 25°C.
Performance at –40°C and 125°C is assured by design, characterization
and correlation with statistical process controls. The LT3009I is guaranteed
over the full –40°C to 125°C operating junction temperature range.
Note 3: The LT3009 adjustable version is tested and specifi ed for these
conditions with the ADJ pin connected to the OUT pin.
Note 4: Operating conditions are limited by maximum junction temperature.
The regulated output voltage specifi cation will not apply for all possible
combinations of input voltage and output current. When operating at the
maximum input voltage, the output current range must be limited. When
operating at the maximum output current, the input voltage must be limited.
Note 5: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specifi ed output current. In dropout,
the output voltage equals (VIN – VDROPOUT). For the LT3009-1.2, dropout
voltage will be limited by the minimum input voltage under some voltage/
load conditions.
Note 6: To satisfy minimum input voltage requirements, the LT3009
adjustable version is tested and specifi ed for these conditions with an
external resistor divider (61.9k bottom, 280k top) which sets VOUT to 3.3V.
The external resistor divider adds 9.69μA of DC load on the output. This
external current is not factored into GND pin current.
Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.5V and a
current source load. GND pin current will increase in dropout. For the fi xed
output voltage versions, an internal resistor divider will add to the GND
pin current (∼2μA for the LT3009-5, ∼1μA for the LT3009-1.2, LT3009-1.5,
LT3009-1.8, LT3009-2.5 and LT3009-3.3). See the GND Pin Current curves
in the Typical Performance Characteristics section.
Note 8: The SHDN pin can be driven below GND only when tied to the IN
pin directly or through a pull-up resistor. If the SHDN pin is driven below
GND by more than –0.3V while IN is powered, the output will turn on.
Note 9: Output noise is listed for the adjustable version with the ADJ pin
connected to the OUT pin. See the RMS Output Noise vs Load Current
curve in the Typical Performance Characteristics Section.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage Noise (Note 9) COUT = 1μF, ILOAD = 20mA, BW = 10Hz to 100kHz 150 μVRMS
ADJ Pin Bias Current l–10 0.3 10 nA
Shutdown Threshold VOUT = Off to On
VOUT = On to Off
l
l0.2
0.66
0.36
1.5 V
V
SHDN Pin Current VSHDN = 0V, VIN = 20V
VSHDN = 20V, VIN = 20V
l
l0.5
±1
1.6
μA
μA
Quiescent Current in Shutdown VIN = 6V, VSHDN = 0V l<1 μA
Ripple Rejection (Note 3) VIN – VOUT = 1.5V, VRIPPLE = 0.5VP-P,
fRIPPLE = 120Hz, ILOAD = 20mA
LT3009
LT3009-1.2
LT3009-1.5
LT3009-1.8
LT3009-2.5
LT3009-3.3
LT3009-5
60
57
55.5
54
52
49
44
72
68
67
66
63
61
56
dB
dB
dB
dB
dB
dB
dB
Current Limit VIN = 20V, VOUT = 0
VIN = VOUT(NOMINAL) + 1V, ΔVOUT = – 5% l22
60 mA
mA
Input Reverse Leakage Current VIN = –20V, VOUT = 0 l200 350 μA
Reverse Output Current VOUT = 1.2V, VIN = 0 0.6 10 μA
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TJ = 25°C. (Note 2)
LT3009 Series
6
3009fc
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
TEMPERATURE (°C)
MINIMUM INPUT VOLTAGE (V)
3009 G03
ILOAD = 20mA
–50 –25 0 25 50 75 100 125 150
OUTPUT CURRENT (mA)
0
0
DROPOUT VOLTAGE (mV)
50
150
200
250
10 20
450
100
515
300
350
400
3009 G01
TA = 125°C
TA = 25°C
ILOAD = 20mA
TEMPERATURE (°C)
0
DROPOUT VOLTAGE (mV)
50
150
200
250
450
100
300
350
400
3009 G02
20mA 10mA
1mA 100μA
–50 –25 0 25 50 75 100 125 150
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage Dropout Voltage Minimum Input Voltage
ADJ Pin Voltage
TEMPERATURE (°C)
ADJ PIN VOLTAGE (V)
3009 G04
0.596
0.608
0.610
0.612
0.590
0.592
0.604
0.600
0.594
0.606
0.588
0.602
0.598
–50 –25 0 25 50 75 100 125 150
ILOAD = 100μA
TA = 25°C, unless otherwise noted.
Output Voltage
LT3009-1.2
Output Voltage
LT3009-1.5
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3009 G27
1.192
1.216
1.220
1.224
1.180
1.184
1.208
1.200
1.188
1.212
1.176
1.204
1.196
–50 –25 0 25 50 75 100 125 150
ILOAD = 100μA
Output Voltage
LT3009-2.5
Output Voltage
LT3009-3.3
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3009 G06
3.278
3.344
3.355
3.366
3.245
3.256
3.322
3.300
3.267
3.333
3.234
3.311
3.289
–50 –25 0 25 50 75 100 125 150
ILOAD = 100μA
Output Voltage
LT3009-1.8
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3009 G05
1.788
1.824
1.830
1.836
1.770
1.776
1.812
1.800
1.782
1.818
1.764
1.806
1.794
–50 –25 0 25 50 75 100 125 150
ILOAD = 100μA
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3009 G28
1.490
1.520
1.525
1.530
1.475
1.480
1.510
1.500
1.485
1.515
1.470
1.505
1.495
–50 –25 0 25 50 75 100 125 150
ILOAD = 100μA
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3009 G29
2.47
2.53
2.54
2.55
2.51
2.49
2.46
2.52
2.45
2.50
2.48
–50 –25 0 25 50 75 100 125 150
ILOAD = 100μA
LT3009 Series
7
3009fc
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
ADJ Pin Bias Current
Adjustable Version
Quiescent Current
Output Voltage
LT3009-5
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3009 G07
5.000
5.100
4.925
4.950
5.050
4.975
4.900
5.075
5.025
–50 –25 0 25 50 75 100 125 150
ILOAD = 100μA
–10
–8
–4
–6
–2
0
2
4
6
8
10
TEMPERATURE (°C)
ADJ PIN BIAS CURRENT (nA)
3009 G08
–50 –25 0 25 50 75 100 125 150 0
1
3
2
4
5
6
TEMPERATURE (°C)
QUIESCENT CURRENT (μA)
3009 G09
–50 –25 0 25 50 75 100 125 150
Quiescent Current Quiescent Current
GND Pin Current
LT3009-1.2
0
200
450
500
246
100
350
150
400
50
0
300
250
13810
579
3009 G31
INPUT VOLTAGE (V)
GND PIN CURRENT (μA)
RL = 60Ω, IL = 20mA
RL = 120Ω, IL = 10mA
RL = 1.2k, IL = 1mA
RL = 12k, IL = 100μA
0
8
18
20
246
4
14
6
16
2
0
12
10
13810
579
3009 G10
INPUT VOLTAGE (V)
QUIESCENT CURRENT (μA)
LT3009-1.2
LT3009-1.5
LT3009-1.8
0
8
18
20
246
4
14
6
16
2
0
12
10
13810
579
3009 G30
INPUT VOLTAGE (V)
QUIESCENT CURRENT (μA)
LT3009-2.5
LT3009-3.3
LT3009-5
LT3009 Series
8
3009fc
LOAD (mA)
0.001
1
GND CURRENT (μA)
10
100
1000
0.01 0.1 1 10 100
3009 G14
VIN = 3.8V
VOUT = 3.3V
GND Pin Current vs ILOAD
GND Pin Current
LT3009-5
GND Pin Current
LT3009-3.3
0246
13810
579
3009 G12
INPUT VOLTAGE (V)
GND PIN CURRENT (μA)
RL = 165Ω, IL = 20mA
RL = 330Ω, IL = 10mA
RL = 3.3k, IL = 1mA
200
450
500
100
350
150
400
50
0
300
250
RL = 33k, IL = 100μA
0
200
450
246
100
350
150
400
50
0
300
250
13810
579
3009 G13
INPUT VOLTAGE (V)
GND PIN CURRENT (μA)
RL = 250Ω, IL = 20mA
RL = 500Ω, IL = 10mA
RL = 5k, IL = 1mA
RL = 50k, IL = 100μA
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
GND Pin Current
LT3009-1.5
0
200
450
500
246
100
350
150
400
50
0
300
250
13810
579
3009 G32
INPUT VOLTAGE (V)
GND PIN CURRENT (μA)
RL = 75Ω, IL = 20mA
RL = 150Ω, IL = 10mA
RL = 1.5k, IL = 1mA
RL = 15k, IL = 100μA
GND Pin Current
LT3009-1.8
0
200
450
500
246
100
350
150
400
50
0
300
250
13810
579
3009 G11
INPUT VOLTAGE (V)
GND PIN CURRENT (μA)
RL = 90Ω, IL = 20mA
RL = 180Ω, IL = 10mA
RL = 1.8k, IL = 1mA
RL = 18k, IL = 100μA
GND Pin Current
LT3009-2.5
0
200
450
500
246
100
350
150
400
50
0
300
250
13810
579
3009 G33
INPUT VOLTAGE (V)
GND PIN CURRENT (μA)
RL = 125Ω, IL = 20mA
RL = 250Ω, IL = 10mA
RL = 2.5k, IL = 1mA
RL = 25k, IL = 100μA
LT3009 Series
9
3009fc
SHDN PIN INPUT CURRENT (nA)
300
400
500
200
100
250
350
450
150
50
0
3009 G16
SHDN PIN VOLTAGE (V)
4 8 12 16 2020 6 10 14 18
SHDN Pin Thresholds SHDN Pin Input Current SHDN Pin Input Current
Current Limit
0
200
600
400
800
1000
1200
1400
1600
TEMPERATURE (°C)
SHDN PIN INPUT CURRENT (nA)
3009 G17
–50 –25 0 25 50 75 100 125 150
VSHDN = 20V
0
10
30
20
40
50
60
70
TEMPERATURE (°C)
CURRENT LIMIT (mA)
3009 G18
–50 –25 0 25 50 75 100 125 150
VIN = 1.6V
VIN = 20V
0
0.2
0.6
0.4
0.8
1.0
1.2
1.4
TEMPERATURE (°C)
3009 G15
–50 –25 0 25 50 75 100 125 150
SHDN PIN THRESHOLD VOLTAGE (V)
OFF TO ON
ON TO OFF
Reverse Output Current Input Ripple Rejection
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
0
5
15
10
20
25
30
35
40
45
50
TEMPERATURE (°C)
REVERSE OUTPUT CURRENT (μA)
3009 G19
OUT
ADJ
–50 –25 0 25 50 75 100 125 150
OUT = ADJ = 1.2V
IN = SHDN = GND
FREQUENCY (Hz)
0
INPUT RIPPLE REJECTION (dB)
10
30
40
50
90
20
60
70
80
3009 G20
4.7μF
1μF
10 100 1k 10k 100k 1M
VIN = 2V + 50mVRMS
VOUT = 600mV
ILOAD = 20mA
LT3009 Series
10
3009fc
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
Input Ripple Rejection Load Regulation Output Noise Spectral Density
RMS Output Noise vs Load
Current (10Hz to 100kHz) Transient ResponseTransient Response
–1.0
–0.5
0.5
0
1.0
1.5
2.0
2.5
3.0
TEMPERATURE (°C)
LOAD REGULATION (mV)
3009 G22
–50 –25 0 25 50 75 100 125 150
ΔIL = 1μA TO 20mA
VOUT = 600mV
VIN = 1.6V
0
10
30
20
40
50
60
70
80
TEMPERATURE (°C)
INPUT RIPPLE REJECTION (dB)
3009 G21
–50 –25 0 25 50 75 100 125 150
VIN = VOUT (NOMINAL) + 1V + 0.5VP-P
RIPPLE AT f = 120Hz
ILOAD = 20mA
ILOAD (mA)
0.001
500
600
700
10
3009 G24
400
300
0.01 0.1 1 100
200
100
0
OUTPUT NOISE (μVRMS)
600mV
1.8V
1.2V
1.5V
2.5V
3.3V
5V
FREQUENCY (Hz)
0.1
OUTPUT NOISE SPECTRAL DENSITY (μV√Hz)
1
100
10
3009 G23
10 100 1k 10k 100k
5V
3.3V
2.5V
1.8V
1.5V
1.2V
1V
0.6V
500μs/DIV
VOUT
50mV/DIV
IOUT
20mA/DIV
3009 G25
IOUT = 1mA TO 20mA
VIN = 5.5V
VOUT = 5V
COUT = 1μF
500μs/DIV
VOUT
50mV/DIV
IOUT
20mA/DIV
3009 G26
IOUT = 1mA TO 20mA
VIN = 5.5V
VOUT = 5V
COUT = 4.7μF
LT3009 Series
11
3009fc
PIN FUNCTIONS
SHDN (Pin 1/Pin 5): Shutdown. Pulling the SHDN pin
low puts the LT3009 into a low power state and turns the
output off. If unused, tie the SHDN pin to VIN. The LT3009
does not function if the SHDN pin is not connected. The
SHDN pin cannot be driven below GND unless tied to the
IN pin. If the SHDN pin is driven below GND while IN is
powered, the output will turn on. SHDN pin logic cannot
be referenced to a negative rail.
GND (Pins 2, 3, 4/Pin 6): Ground. Connect the bottom
of the resistor divider that sets output voltage directly to
GND for the best regulation.
IN (Pin 5/Pin 4): Input. The IN pin supplies power to the
device. The LT3009 requires a bypass capacitor at IN if
the device is more than six inches away from the main
input fi lter capacitor. In general, the output impedance
of a battery rises with frequency, so it is advisable to
include a bypass capacitor in battery-powered circuits. A
bypass capacitor in the range of 0.1μF to 10μF will suf-
fi ce. The LT3009 withstands reverse voltages on the IN
pin with respect to ground and the OUT pin. In the case
of a reversed input, which occurs with a battery plugged
in backwards, the LT3009 acts as if a large resistor is in
series with its input. Limited reverse current fl ows into
the LT3009 and no reverse voltage appears at the load.
The device protects both itself and the load.
OUT (Pin 6/Pins 2, 3): Output. This pin supplies power to
the load. Use a minimum output capacitor of 1μF to prevent
oscillations. Large load transient applications require larger
output capacitors to limit peak voltage transients. See the
Applications Information section for more information on
output capacitance and reverse output characteristics.
ADJ (Pin 7/Pin 1): Adjust. This pin is the error amplifi er’s
inverting terminal. Its 300pA typical input bias current
fl ows out of the pin (see curve of ADJ Pin Bias Current vs
Temperature in the Typical Performance Characteristics
section). The ADJ pin voltage is 600mV referenced to GND
and the output voltage range is 600mV to 19.5V. This pin
is not connected in the fi xed output voltage versions.
NC (Pins 7, 8/Pin 1): No Connect. For the adjustable voltage
version, Pin 8 is an NC pin in the SC70 package. For the
fi xed voltage versions, Pin 7 and Pin 8 are NC pins in the
SC70 package, and Pin 1 is an NC pin in the DFN package.
NC pins are not tied to any internal circuitry. They may be
fl oated, tied to VIN or tied to GND.
Exposed Pad (Pin 7, DFN Package Only): Ground. The
Exposed Pad (backside) of the DFN package is an electri-
cal connection to GND. To ensure optimum performance,
solder Pin 7 to the PCB and tie directly to Pin 6.
(SC70/DFN)
LT3009 Series
12
3009fc
APPLICATIONS INFORMATION
The LT3009 is a low dropout linear regulator with ultra-
low quiescent current and shutdown. Quiescent current is
extremely low at 3μA and drops well below 1μA in shut-
down. The device supplies up to 20mA of output current.
Dropout voltage at 20mA is typically 280mV. The LT3009
incorporates several protection features, making it ideal for
use in battery-powered systems. The device protects itself
against both reverse-input and reverse-output voltages.
In battery backup applications, where a backup battery
holds up the output when the input is pulled to ground,
the LT3009 acts as if a blocking diode is in series with its
output and prevents reverse current fl ow. In applications
where the regulator load returns to a negative supply, the
output can be pulled below ground by as much as 22V
without affecting startup or normal operation.
Adjustable Operation
The LT3009 has an output voltage range of 0.6V to 19.5V.
Figure 1 shows that output voltage is set by the ratio of two
external resistors. The IC regulates the output to maintain
the ADJ pin voltage at 600mV referenced to ground. The
current in R1 equals 600mV/R1 and the current in R2 is
the current in R1 minus the ADJ pin bias current. The
ADJ pin bias current, typically 300pA at 25°C, fl ows out
of the pin. Calculate the output voltage using the formula
in Figure 1. An R1 value of 619k sets the divider current
to 0.97μA. Do not make R1’s value any greater than 619k
to minimize output voltage errors due to the ADJ pin bias
current and to insure stability under minimum load condi-
tions. In shutdown, the output turns off and the divider
current is zero. Curves of ADJ Pin Voltage vs Temperature
and ADJ Pin Bias Current vs Temperature appear in the
Typical Performance Characteristics.
Specifi cations for output voltages greater than 0.6V are
proportional to the ratio of the desired output voltage to
0.6V: VOUT/0.6V. For example, load regulation for an output
current change of 100μA to 20mA is –0.7mV typical at
VOUT = 0.6V. At VOUT = 5V, load regulation is:
5
06 07 583
V
VmV mV
.•( . ) .−=−
Table 1 shows resistor divider values for some com-
mon output voltages with a resistor divider current of
about 1μA.
Figure 1. Adjustable Operation
Table 1. Output Voltage Resistor Divider Values
VOUT R1 R2
1V 604k 402k
1.2V 604k 604k
1.5V 590k 887k
1.8V 590k 1.18M
2.5V 590k 1.87M
3V 590k 2.37M
3.3V 619k 2.8M
5V 590k 4.32M
Because the ADJ pin is relatively high impedance (de-
pending on the resistor divider used), stray capacitances
at this pin should be minimized. Special attention should
be given to any stray capacitances that can couple ex-
ternal signals onto the ADJ pin producing undesirable
output transients or ripple.
Extra care should be taken in assembly when using high
valued resistors. Small amounts of board contamination
can lead to signifi cant shifts in output voltage. Appro-
priate post-assembly board cleaning measures should
IN
SHDN
R2
R1
3009 F0
OUT
VIN
VOUT = 600mV* (1 + R2/R1) – (IADJ • R2)
VADJ = 600mV
IADJ = 0.3nA at 25°C
OUTPUT RANGE = 0.6V to 19.5V ADJ
GND
LT3009
VOU
T
LT3009 Series
13
3009fc
be implemented to prevent board contamination. If the
board is to be subjected to humidity cycling or if board
cleaning measures cannot be guaranteed, consideration
should be given to using resistors an order of magnitude
smaller than in Table 1 to prevent contamination from
causing unwanted shifts in the output voltage.
Output Capacitance and Transient Response
The LT3009 is stable with a wide range of output capaci-
tors. The ESR of the output capacitor affects stability, most
notably with small capacitors. Use a minimum output
capacitor of 1μF with an ESR of 3Ω or less to prevent os-
cillations. The LT3009 is a micropower device and output
load transient response is a function of output capacitance.
Larger values of output capacitance decrease the peak
deviations and provide improved transient response for
larger load current changes.
Give extra consideration to the use of ceramic capacitors.
Manufacturers make ceramic capacitors with a variety of
dielectrics, each with different behavior across tempera-
ture and applied voltage. The most common dielectrics
APPLICATIONS INFORMATION
DC BIAS VOLTAGE (V)
CHANGE IN VALUE (%)
3009 F02
20
0
–20
–40
–60
–80
–100 04810
26 12 14
X5R
Y5V
16
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
TEMPERATURE (°C)
–50
40
20
0
–20
–40
–60
–80
–100 25 75
3009 F03
–25 0 50 100 125
Y5V
CHANGE IN VALUE (%)
X5R
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
Figure 2. Ceramic Capacitor DC Bias Characteristics Figure 3. Ceramic Capacitor Temperature Characteristics
are specifi ed with EIA temperature characteristic codes
of Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics
provide high C-V products in a small package at low cost,
but exhibit strong voltage and temperature coeffi cients as
shown in Figures 2 and 3. When used with a 5V regulator,
a 16V 10μF Y5V capacitor can exhibit an effective value
as low as 1μF to 2μF for the DC bias voltage applied and
over the operating temperature range. The X5R and X7R
dielectrics yield more stable characteristics and are more
suitable for use as the output capacitor. The X7R type has
better stability across temperature, while the X5R is less
expensive and is available in higher values. One must still
exercise care when using X5R and X7R capacitors; the
X5R and X7R codes only specify operating temperature
range and maximum capacitance change over temperature.
Capacitance change due to DC bias with X5R and X7R
capacitors is better than Y5V and Z5U capacitors, but can
still be signifi cant enough to drop capacitor values below
appropriate levels. Capacitor DC bias characteristics tend
to improve as component case size increases, but expected
capacitance at operating voltage should be verifi ed.
LT3009 Series
14
3009fc
Figure 4. Noise Resulting from Tapping
on a Ceramic Capacitor
Voltage and temperature coeffi cients are not the only
sources of problems. Some ceramic capacitors have a
piezoelectric response. A piezoelectric device generates
voltage across its terminals due to mechanical stress,
similar to the way a piezoelectric accelerometer or micro-
phone works. For a ceramic capacitor, the stress can be
induced by vibrations in the system or thermal transients.
The resulting voltages produced can cause appreciable
amounts of noise, especially when a ceramic capacitor is
used for noise bypassing. A ceramic capacitor produced
Figure 4’s trace in response to light tapping from a pencil.
Similar vibration induced behavior can masquerade as
increased output voltage noise.
APPLICATIONS INFORMATION
Thermal Considerations
The LT3009’s maximum rated junction temperature of
125°C limits its power-handling capability. Two components
comprise the power dissipated by the device:
1. Output current multiplied by the input/output voltage
differential: IOUT • (VIN – VOUT)
2. GND pin current multiplied by the input voltage:
IGND • VIN
GND pin current is found by examining the GND Pin Cur-
rent curves in the Typical Performance Characteristics
section. Power dissipation equals the sum of the two
components listed prior.
The LT3009 regulator has internal thermal limiting designed
to protect the device during overload conditions. For con-
tinuous normal conditions, do not exceed the maximum
junction temperature rating of 125°C. Carefully consider
all sources of thermal resistance from junction to ambi-
ent including other heat sources mounted in proximity to
the LT3009. For surface mount devices, heat sinking is
accomplished by using the heat spreading capabilities of
the PC board and its copper traces. Copper board stiffeners
and plated through-holes can also be used to spread the
heat generated by power devices.
100ms/DIV
VOUT
500μV/DIV
3009 F0
4
VOUT = 0.6V
COUT = 22μF
ILOAD = 10μA
LT3009 Series
15
3009fc
The following tables list thermal resistance for several dif-
ferent board sizes and copper areas. All measurements
were taken in still air on 3/32" FR-4 board with one ounce
copper.
Calculating Junction Temperature
Example: Given an output voltage of 3.3V, an input volt-
age range of 12V ±5%, an output current range of 0mA
to 20mA and a maximum ambient temperature of 85°C,
what will the maximum junction temperature be for an
application using the DC package?
The power dissipated by the device is equal to:
I
OUT(MAX) (VIN(MAX) – VOUT) + IGND (VIN(MAX))
where,
I
OUT(MAX) = 20mA
V
IN(MAX) = 12.6V
I
GND at (IOUT = 20mA, VIN = 12.6V) = 0.45mA
So,
P = 20mA(12.6V – 3.3V) + 0.45mA(12.6V) = 191.7mW
The thermal resistance will be in the range of 65°C/W to
85°C/W depending on the copper area. So the junction
temperature rise above ambient will be approximately
equal to:
0.1917W(75°C/W) = 14.4°C
The maximum junction temperature equals the maximum
junction temperature rise above ambient plus the maximum
ambient temperature or:
T
J(MAX) = 85°C + 14.4°C = 99.4°C
Table 2: Measured Thermal Resistance for DC Package
COPPER AREA BOARD
AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)TOPSIDE* BACKSIDE
2500mm22500mm22500mm265°C/W
1000mm22500mm22500mm270°C/W
225mm22500mm22500mm275°C/W
100mm22500mm22500mm280°C/W
50mm22500mm22500mm285°C/W
*Device is mounted on the topside.
Table 3: Measured Thermal Resistance for SC70 Package
COPPER AREA BOARD
AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)TOPSIDE* BACKSIDE
2500mm22500mm22500mm275°C/W
1000mm22500mm22500mm280°C/W
225mm22500mm22500mm285°C/W
100mm22500mm22500mm290°C/W
50mm22500mm22500mm295°C/W
*Device is mounted on the topside.
APPLICATIONS INFORMATION
LT3009 Series
16
3009fc
OUTPUT AND ADJ VOLTAGE (V)
0
60
80
100
8
40
20
50
70
90
30
10
021 43 67 9
510
3009 F05
REVERSE CURRENT (μA)
OUT CURRENT
ADJ CURRENT
Figure 5. Reverse Output Current
Protection Features
The LT3009 incorporates several protection features that
make it ideal for use in battery-powered circuits. In ad-
dition to the normal protection features associated with
monolithic regulators, such as current limiting and thermal
limiting, the device also protects against reverse-input
voltages, reverse-output voltages and reverse output-to-
input voltages.
Current limit protection and thermal overload protection
protect the device against current overload conditions at
the output of the device. For normal operation, do not
exceed a junction temperature of 125°C.
The LT3009 IN pin withstands reverse voltages of 22V. The
device limits current fl ow to less than 1mA (typically less
than 220μA) and no negative voltage appears at OUT. The
device protects both itself and the load against batteries
that are plugged in backwards.
The SHDN pin cannot be driven below GND unless tied to
the IN pin. If the SHDN pin is driven below GND while IN
is powered, the output will turn on. SHDN pin logic cannot
be referenced to a negative rail.
The LT3009 incurs no damage if OUT is pulled below
ground. If IN is left open circuit or grounded, OUT can be
pulled below ground by 22V. No current fl ows from the
pass transistor connected to OUT. However, current fl ows
in (but is limited by) the resistor divider that sets output
voltage. Current fl ows from the bottom resistor in the
divider and from the ADJ pin’s internal clamp through the
top resistor in the divider to the external circuitry pulling
OUT below ground. If IN is powered by a voltage source,
OUT sources current equal to its current limit capability
and the LT3009 protects itself by thermal limiting if neces-
sary. In this case, grounding the SHDN pin turns off the
LT3009 and stops OUT from sourcing current.
The LT3009 incurs no damage if the ADJ pin is pulled
above or below ground by 22V. If IN is left open circuit or
grounded, ADJ acts like a 100k resistor in series with a
diode when pulled above or below ground.
In circuits where a backup battery is required, several
different input/output conditions can occur. The output
voltage may be held up while the input is either pulled
to ground, pulled to some intermediate voltage or is left
open circuit. Current fl ow back into the output follows the
curve shown in Figure 5.
If the LT3009 IN pin is forced below the OUT pin or the
OUT pin is pulled above the IN pin, input current typically
drops to less than 1μA. This occurs if the LT3009 input is
connected to a discharged (low voltage) battery and either
a backup battery or a second regulator circuit holds up
the output. The state of the SHDN pin has no effect in the
reverse current if OUT is pulled above IN.
APPLICATIONS INFORMATION
LT3009 Series
17
3009fc
TYPICAL APPLICATIONS
IN
SHDN
3.3V
3009 TA02
OUT
1μF 1μF
GND
LT3009-3.3
NO PROTECTION
DIODES NEEDED!
VIN
12V
LOAD:
SYSTEM MONITOR,
VOLATILE MEMORY, ETC.
IN
SHDN
5V
3009 TA03
OUT FAULT
1μFSUPERCAP 1μF
SENSE
PWR TO
MONITORING
CENTER
GND
GND
LT3009-5
LINE POWER
VLINE
12V TO 15V
DCHARGE
RLIMIT
LINE
INTERRUPT
DETECT
Keep-Alive Power Supply
Last-Gasp Circuit
LT3009 Series
18
3009fc
DC Package
6-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1703)
2.00 p0.10
(4 SIDES)
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WCCD-2)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
0.38 p 0.05
BOTTOM VIEW—EXPOSED PAD
0.56 p 0.05
(2 SIDES)
0.75 p0.05
R = 0.115
TYP
1.37 p0.05
(2 SIDES)
1
3
64
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
0.200 REF
0.00 – 0.05
(DC6) DFN 1103
0.25 p 0.05
1.42 p0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
0.61 p0.05
(2 SIDES)
1.15 p0.05
0.675 p0.05
2.50 p0.05
PACKAGE
OUTLINE
0.25 p 0.05
0.50 BSC
0.50 BSC
PIN 1
CHAMFER OF
EXPOSED PAD
PACKAGE DESCRIPTION
LT3009 Series
19
3009fc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTION
SC8 Package
8-Lead Plastic SC70
(Reference LTC DWG # 05-08-1639 Rev Ø)
1.15 – 1.35
(NOTE 4)
1.80 – 2.40
0.15 – 0.27
8 PLCS (NOTE 3)
SC8 SC70 0905 REV Ø
1.80 – 2.20
(NOTE 4)
0.50 BSC
PIN 1
PIN 8
0.80 – 1.00
1.00 MAX
0.00 – 0.10
REF
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. DETAILS OF THE PIN 1 IDENTIFIER ARE OPTIONAL,
BUT MUST BE LOCATED WITHIN THE INDEX AREA
7. EIAJ PACKAGE REFERENCE IS EIAJ SC-70 AND JEDEC MO-203 VARIATION BA
2.8 BSC
0.30
MAX
0.50
REF
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
1.8 REF
1.00 REF
INDEX AREA
(NOTE 6)
0.10 – 0.18
(NOTE 3)
0.26 – 0.46
GAUGE PLANE
0.15 BSC
0.10 – 0.40
LT3009 Series
20
3009fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2007
LT 0709 REV C • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
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VIN: 2.7V to 20V, VOUT = 1.21V, VDO = 0.34V, IQ = 1mA, ISD < 1μA, Low Noise < 40μVRMS,
“A” Version Stable with Ceramic Capacitors, DD and TO220-5 Packages
LTC1844 150mA, Low Noise Micropower VLDO VIN: 1.6V to 6.5V, VOUT(MIN) = 1.25V, VDO = 0.09V, IQ = 35μA, ISD < 1μA,
Low Noise: < 30μVRMS, ThinSOT Package
LT1962 300mA, Low Noise Micropower LDO VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, VDO = 0.27V, IQ = 30μA, ISD < 1μA,
Low Noise: < 20μVRMS, MS8 Package
LT1963/LT1963A 1.5A, Low Noise, Fast Transient
Response LDOs
VIN: 2.1V to 20V, VOUT(MIN) = 1.21V, VDO = 0.34V, IQ = 1mA, ISD < 1μA,
Low Noise: < 40μVRMS, “A” Version Stable with Ceramic Capacitors, DD, TO220-5,
SOT223 and S8 Packages
LT1964 200mA, Low Noise Micropower,
Negative LDO
VIN: –2.2V to –20V, VOUT(MIN) = 1.21V, VDO = 0.34V, IQ = 30μA, ISD = 3μA,
Low Noise: < 30μVRMS, Stable with Ceramic Capacitors,ThinSOT Package
LT3010 50mA, High Voltage, Micropower LDO VIN: 3V to 80V, VOUT(MIN) = 1.275V, VDO = 0.3V, IQ = 30μA, ISD < 1μA,
Low Noise: < 100μVRMS, Stable with 1μF Output Capacitor, MS8E Package
LT3012/LT3012B 250mA, High Voltage, Micropower LDOs VIN: 4V to 80V, VOUT(MIN) = 1.24V, VDO = 0.4V, IQ = 40μA, ISD < 1μA,
Low Noise: <100μVRMS, Stable with 3.3μF Output Capacitor, 12-Lead 4mm × 3mm DFN
and 16-Lead FE Packages
LT3013/LT3013B 250mA, High Voltage, Micropower LDOs
with PWRGD
VIN: 4V to 80V, VOUT(MIN) = 1.22V, VDO = 0.4V, IQ = 40μA, ISD < 1μA,
Low Noise: < 100μVRMS, Stable with 3.3μF Output Capacitor,
12-Lead 4mm × 3mm DFN and 16-Lead FE Packages
LT3014/LT3014B 20mA, High Voltage, Micropower LDO VIN: 3V to 80V, VOUT(MIN) = 1.2V, VDO = 0.35V, IQ = 7μA, ISD < 1μA,
Low Noise: < 100μVRMS, Stable with 0.47μF Output Capacitor, SOT23-5 and
3mm × 3mm DFN Packages
LT3020 100mA, Low Voltage VLDO VIN: 0.9V to 10V, VOUT(MIN) = 0.20V, VDO = 0.15V, IQ = 120μA, ISD < 1μA, 3mm × 3mm DFN
and MS8 Packages
LT3021 500mA, Low Voltage VLDO VIN: 0.9V to 10V, VOUT(MIN) = 0.20V, VDO = 0.16V, IQ = 120μA, ISD < 3μA, 5mm × 5mm DFN
and SO8 Packages
LT3023 Dual 100mA, Low Noise,
Micropower LDO
VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, VDO = 0.30V, IQ = 40μA, ISD < 1μA, DFN and
MS10 Packages
LT3024 Dual 100mA/500mA, Low Noise,
Micropower LDO
VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, VDO = 0.30V, IQ = 60μA, ISD < 1μA, DFN and TSSOP-
16E Packages
LTC3025 300mA, Low Voltage Micropower VLDO 45mV Dropout Voltage, Low Noise 110μVRMS, VIN = 1.14V to 5.5V, Low IQ: 54μA,
6-Lead 2mm × 2mm DFN Package
LTC3026 1.5A, Low Input Voltage VLDO 100mV Dropout Voltage, Low Noise 80μVRMS, VIN = 0.9V to 5.5V, Low IQ: 950μA,
10-Lead 3mm × 3mm DFN and MS10E Packages
LT3027 Dual 100mA, Low Noise, Micropower
LDO with Independent Inputs
VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, VDO = 0.30V, IQ = 40μA, ISD < 1μA, DFN and
MS10E Packages
LT3028 Dual 100mA/500mA, Low Noise,
Micropower LDO with Independent
Inputs
VIN: 1.8V to 20V, VOUT(MIN) = 1.22V, VDO = 0.30V, IQ = 60μA, ISD < 1μA, DFN and
TSSOP-16E Packages
ThinSOT is a trademark of Linear Technology Corporation.
