LINER LT1762 3î¼a iq, 20ma, 45v low dropout fault tolerant linear regulators output current: 20ma Datasheet

LT3007 Series
3µA IQ, 20mA, 45V
Low Dropout Fault Tolerant
Linear Regulators
DESCRIPTION
FEATURES
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FMEA Fault Tolerant:
Output Stays at or Below Regulation Voltage During
Adjacent Pin Short or if a Pin Is Left Floating
Ultralow Quiescent Current: 3µA
Input Voltage Range: 2.0V to 45V
Output Current: 20mA
Dropout Voltage: 300mV
Adjustable Output (VADJ = VOUT(MIN) = 600mV)
Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V
Output Tolerance: ±2% Over Load, Line and
Temperature
Stable with Low ESR, Ceramic Output Capacitors
(2.2µF Minimum)
Shutdown Current: <1µA
Current Limit Protection
Reverse-Battery Protection
Thermal Limit Protection
TSOT-23 Package
APPLICATIONS
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Automotive
Low Current Battery-Powered Systems
Keep-Alive Power Supplies
Remote Monitoring
Utility Meters
Low Power Industrial Applications
The LT®3007 series are micropower, low dropout voltage
(LDO) linear regulators. The devices supply 20mA output
current with a dropout voltage of 300mV. 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 LT3007 regulators optimize stability and transient
response with low ESR ceramic capacitors, requiring a
minimum of only 2.2µF. 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 reversecurrent protection.
The LT3007 series are ideal for applications that require
moderate output drive capability coupled with ultralow
standby power consumption. The device is available in
fixed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and
5V, and an adjustable version with an output voltage range
of 0.6V to 44.5V. The LT3007 is available in the thermally
enhanced 8-lead TSOT-23 package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered and ThinSOT is a
trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
TYPICAL APPLICATION
Dropout Voltage/Quiescent Current
500
3.3V, 20mA Supply with Shutdown
OUT
LT3007-3.3
SHDN
SENSE
GND
3007 TA01a
2.2µF
DROPOUT VOLTAGE (mV)
IN
1µF
VOUT
3.3V
20mA
DROPOUT
VOLTAGE
400
350
5
4
300
250
IQ
200
3
2
150
100
QUIESCENT CURRENT (µA)
VIN
3.8V TO
45V
450
6
ILOAD = 20mA
1
50
0
–50 –25
0
0
25 50 75 100 125 150
TEMPERATURE (°C)
3007 TA01b
3007f
For more information www.linear.com/LT3007
1
LT3007 Series
ABSOLUTE MAXIMUM RATINGS
(Note 1)
IN Pin Voltage..........................................................±50V
OUT Pin Voltage.......................................................±50V
Input-to-Output Differential Voltage.........................±50V
ADJ Pin Voltage.......................................................±50V
SENSE Pin Voltage...................................................±50V
SHDN Pin Voltage (Note 8)......................................±50V
Output Short-Circuit Duration........................... Indefinite
Operating Junction Temperature Range (Notes 2, 3)
E, I Grade............................................–40°C to 125°C
Storage Temperature Range....................–65°C to 150°C
Lead Temperature: Soldering, 10 sec..................... 300°C
PIN CONFIGURATION
TOP VIEW
SHDN
GND
GND
GND
1
2
3
4
8
7
6
5
ADJ/SENSE**
OUT
NC
IN
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
TJMAX = 125°C, θJA = 65°C/W TO 85°C/W*
* See the Applications Information Section.
** SENSE for Fixed Voltage Output Versions.
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3007ETS8#PBF
LT3007ETS8#TRPBF
LTGJW
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ITS8#PBF
LT3007ITS8#TRPBF
LTGJW
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ETS8-1.2#PBF
LT3007ETS8-1.2#TRPBF
LTGKB
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ITS8-1.2#PBF
LT3007ITS8-1.2#TRPBF
LTGKB
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ETS8-1.5#PBF
LT3007ETS8-1.5#TRPBF
LTGKD
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ITS8-1.5#PBF
LT3007ITS8-1.5#TRPBF
LTGKD
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ETS8-1.8#PBF
LT3007ETS8-1.8#TRPBF
LTGJZ
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ITS8-1.8#PBF
LT3007ITS8-1.8#TRPBF
LTGJZ
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ETS8-2.5#PBF
LT3007ETS8-2.5#TRPBF
LTGJX
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ITS8-2.5#PBF
LT3007ITS8-2.5#TRPBF
LTGJX
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ETS8-3.3#PBF
LT3007ETS8-3.3#TRPBF
LTGKC
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ITS8-3.3#PBF
LT3007ITS8-3.3#TRPBF
LTGKC
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ETS8-5#PBF
LT3007ETS8-5#TRPBF
LTGJY
8-Lead Plastic TSOT-23
–40°C to 125°C
LT3007ITS8-5#PBF
LT3007ITS8-5#TRPBF
LTGJY
8-Lead Plastic TSOT-23
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified 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 specifications, go to: http://www.linear.com/tapeandreel/
3007f
2
For more information www.linear.com/LT3007
LT3007 Series
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TJ = 25°C. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
2
45
V
LT3007-1.2: VIN = 2V, ILOAD = 100µA
2V < VIN < 45V, 1µA < ILOAD < 20mA
l
1.188
1.176
1.2
1.2
1.212
1.224
V
V
LT3007-1.5: VIN = 2.05V, ILOAD = 100µA
2.05V < VIN < 45V, 1µA < ILOAD < 20mA
l
1.485
1.47
1.5
1.5
1.515
1.53
V
V
LT3007-1.8: VIN = 2.35V, ILOAD = 100µA
2.35V < VIN < 45V, 1µA < ILOAD < 20mA
l
1.782
1.764
1.8
1.8
1.818
1.836
V
V
LT3007-2.5: VIN = 3.05V, ILOAD = 100µA
3.05V < VIN < 45V, 1µA < ILOAD < 20mA
l
2.475
2.45
2.5
2.5
2.525
2.55
V
V
LT3007-3.3: VIN = 3.85V, ILOAD = 100µA
3.85V < VIN < 45V, 1µA < ILOAD < 20mA
l
3.267
3.234
3.3
3.3
3.333
3.366
V
V
LT3007-5: VIN = 5.55V, ILOAD = 100µA
5.55V < VIN < 45V, 1µA < ILOAD < 20mA
l
4.95
4.9
5
5
5.05
5.1
V
V
VIN = 2V, ILOAD = 100µA
2V < VIN < 45V, 1µA < ILOAD < 20mA
l
594
588
600
600
606
612
mV
mV
Line Regulation (Note 3)
LT3007-1.2: ∆VIN = 2V to 45V, ILOAD = 1mA
LT3007-1.5: ∆VIN = 2.05V to 45V, ILOAD = 1mA
LT3007-1.8: ∆VIN = 2.35V to 45V, ILOAD = 1mA
LT3007-2.5: ∆VIN = 3.05V to 45V, ILOAD = 1mA
LT3007-3.3: ∆VIN = 3.85V to 45V, ILOAD = 1mA
LT3007-5: ∆VIN = 5.55V to 45V, ILOAD = 1mA
LT3007: ∆VIN = 2V to 45V, ILOAD = 1mA
l
l
l
l
l
l
l
1.2
1.5
1.8
2.5
3.3
5
0.6
6
7.5
9
12.5
16.5
25
3
mV
mV
mV
mV
mV
mV
mV
Load Regulation (Note 3)
LT3007-1.2: VIN = 2V, ILOAD = 1µA to 10mA
VIN = 2V, ILOAD = 1µA to 20mA
l
l
0.8
1
4
10
mV
mV
LT3007-1.5: VIN = 2.05V, ILOAD = 1µA to 10mA
VIN = 2.05V, ILOAD = 1µA to 20mA
l
l
1
1.3
5
13
mV
mV
LT3007-1.8: VIN = 2.35V, ILOAD = 1µA to 10mA
VIN = 2.35V, ILOAD = 1µA to 20mA
l
l
1.2
1.5
6
15
mV
mV
LT3007-2.5: VIN = 3.05V, ILOAD = 1µA to 10mA
VIN = 3.05V, ILOAD = 1µA to 20mA
l
l
1.7
2.1
8.3
21
mV
mV
LT3007-3.3: VIN = 3.85V, ILOAD = 1µA to 10mA
VIN = 3.85V, ILOAD = 1µA to 20mA
l
l
2.2
2.8
11
28
mV
mV
LT3007-5:
VIN = 5.55V, ILOAD = 1µA to 10mA
VIN = 5.55V, ILOAD = 1µA to 20mA
l
l
3.4
4.2
17
42
mV
mV
LT3007:
VIN = 2V, ILOAD = 1µA to 10mA
VIN = 2V, ILOAD = 1µA to 20mA
l
l
0.4
0.5
2
5
mV
mV
115
180
250
mV
mV
170
250
350
mV
mV
270
340
470
mV
mV
300
365
500
mV
mV
6
µA
µA
Operating Voltage
Regulated Output Voltage
ADJ Pin Voltage (Notes 3, 4)
Dropout Voltage
VIN = VOUT(NOMINAL) (Notes 5, 6)
Quiescent Current (Notes 6, 7)
ILOAD = 100µA
ILOAD = 100µA
l
ILOAD = 1mA
ILOAD = 1mA
l
ILOAD = 10mA
ILOAD = 10mA
l
ILOAD = 20mA
ILOAD = 20mA
l
ILOAD = 0µA
ILOAD = 0µA
l
3
3007f
For more information www.linear.com/LT3007
3
LT3007 Series
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TJ = 25°C. (Note 2)
PARAMETER
CONDITIONS
MIN
GND Pin Current
VIN = VOUT(NOMINAL) + 0.5V (Notes 6, 7)
ILOAD = 0µA
ILOAD = 100µA
ILOAD = 1mA
ILOAD = 10mA
ILOAD = 20mA
Output Voltage Noise (Note 9)
COUT = 2.2µF, ILOAD = 20mA, BW = 10Hz to 100kHz
l
l
l
l
l
Shutdown Threshold
VOUT = Off to On
VOUT = On to Off
l
l
SHDN Pin Current
VSHDN = 0V, VIN = 45V
VSHDN = 45V, VIN = 45V
l
l
Quiescent Current in Shutdown
VIN = 6V, VSHDN = 0V
l
Ripple Rejection (Note 3)
VIN – VOUT = 2V, VRIPPLE = 0.5VP-P,
fRIPPLE = 120Hz, ILOAD = 20mA
LT3007
LT3007-1.2
LT3007-1.5
LT3007-1.8
LT3007-2.5
LT3007-3.3
LT3007-5
UNITS
3
6
21
160
350
6
12
50
500
1200
µA
µA
µA
µA
µA
l
Input Reverse-Leakage Current
VIN = –45V, VOUT = 0
l
Reverse-Output Current
VOUT = 1.2V, VIN = 0
µVRMS
–10
0.4
10
nA
0.25
0.67
0.61
1.5
V
V
±1
2
µA
µA
<1
µA
0.65
58
54
53
52
49
47
42
VIN = 45V, VOUT = 0
VIN = VOUT(NOMINAL) + 1V, ∆VOUT = – 5%
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 LT3007 regulators are tested and specified under pulse
load conditions such that TJ @ TA. The LT3007E is guaranteed to meet
performance specifications from 0°C to 125°C operating junction
temperature. Specifications over the –40°C to 125°C operating junction
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT3007I is guaranteed over the full
– 40°C to 125°C operating junction temperature range.
Note 3: The LT3007 adjustable version is tested and specified 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 specification 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 specified output current. In dropout,
the output voltage equals (VIN – VDROPOUT). For the LT3007-1.2 and
LT3007‑1.5, dropout voltage will be limited by the minimum input voltage.
MAX
92
ADJ Pin Bias Current
Current Limit
TYP
22
70
66
65
64
61
59
54
dB
dB
dB
dB
dB
dB
dB
75
mA
mA
1
30
µA
0.6
10
µA
Note 6: To satisfy minimum input voltage requirements, the LT3007
adjustable version is tested and specified 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) + 0.55V and
a current source load. GND pin current will increase in dropout. For the
fixed output voltage versions, an internal resistor divider will add about
1μA to the GND pin current. 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.
3007f
4
For more information www.linear.com/LT3007
LT3007 Series
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage
Minimum Input Voltage
450
2.0
400
400
1.8
TJ = 125°C
350
300
TJ = 25°C
250
200
150
100
350
300
200
0
6 8 10 12 14 16 18 20
OUTPUT CURRENT (mA)
100µA
100
0
4
1mA
150
50
2
10mA
250
50
0
20mA
–50 –25
1.4
1.2
1
0.8
0.6
0.4
0
25
50
75
0
100 125 150
–50 –25
ILOAD = 100µA
1.220
ILOAD = 100µA
1.525
1.520
1.212
1.515
0.596
0.594
OUTPUT VOLTAGE (V)
1.216
0.598
1.208
1.204
1.200
1.196
1.192
1.188
1.510
1.505
1.500
1.495
1.490
1.485
1.184
1.480
0.590
1.180
1.176
–50 –25
1.475
1.470
–50 –25
0
25
50
75
100 125 150
ILOAD = 100µA
0.592
0.588
–50 –25
75
Output Voltage LT3007-1.5
1.530
0.606
0.600
50
3007 G03
0.608
0.602
25
TEMPERATURE (°C)
Output Voltage LT3007-1.2
1.224
0.604
0
3007 G02
OUTPUT VOLTAGE (V)
ADJ PIN VOLTAGE (V)
1.6
TEMPERATURE (°C)
ADJ Pin Voltage
0.610
ILOAD = 20mA
0.2
3007 G01
0.612
MINIMUM INPUT VOLTAGE (V)
450
DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
Dropout Voltage
TA = 25°C, unless otherwise noted.
100 125 150
0
TEMPERATURE (°C)
25
50
75
100 125 150
TEMPERATURE (°C)
0
25
50
75
100 125 150
TEMPERATURE (°C)
3007 G05
3007 G06
3007 G04
Output Voltage LT3007-1.8
1.830
Output Voltage LT3007-2.5
2.550
ILOAD = 100µA
2.540
1.812
1.806
1.800
1.794
1.788
1.782
3.355
3.344
2.520
2.510
2.500
2.490
2.480
2.470
1.776
1.770
1.764
–50 –25
ILOAD = 100µA
2.530
1.816
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
1.824
3.366
OUTPUT VOLTAGE (V)
1.836
0
25
50
75
TEMPERATURE (°C)
100 125 150
3007 G07
ILOAD = 100µA
3.333
3.322
3.311
3.300
3.289
3.278
3.267
3.256
2.460
2.450
–50 –25
Output Voltage LT3007-3.3
3.245
0
25
50
75
TEMPERATURE (°C)
100 125 150
3007 G08
3.234
–50 –25
0
25
50
75
TEMPERATURE (°C)
100 125 150
3007 G09
3007f
For more information www.linear.com/LT3007
5
LT3007 Series
TYPICAL PERFORMANCE CHARACTERISTICS
ADJ Pin Bias Current
Output Voltage LT3007-5
ILOAD = 100µA
6
8
ADJ PIN BIAS CURRENT (nA)
5.050
5.025
5.000
4.975
4.950
4.925
5
6
4
2
0
–2
–4
–6
0
25
50
75
–10
100 125 150
TEMPERATURE (°C)
–50 –25
QUIESCENT CURRENT (µA)
24
21
18
15
12
9
9 10
RL = 60Ω, IL = 20mA
300
250
200
RL = 120Ω, IL = 10mA
150
0
8
GND Pin Current LT3007-1.8
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
0
10
450
400
GND PIN CURRENT (µA)
450
400
RL = 180Ω, IL = 10mA
150
100
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
RL = 250Ω, IL = 10mA
150
8
9
10
3007 G16
0
RL = 2.5k, IL = 1mA
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
0
1
2
8
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3007 G15
RL = 165Ω, IL = 20mA
350
300
250
200
RL = 330Ω, IL = 10mA
150
100
RL = 25k, IL = 100µA
50
RL = 1.8k, IL = 1mA
0
300
250
100
RL = 18k, IL = 100µA
50
RL = 125Ω, IL = 20mA
200
RL = 1.5k, IL = 1mA
GND Pin Current LT3007-3.3
400
200
RL = 15k, IL = 100µA
3007 G14
450
300
RL = 150Ω, IL = 10mA
150
500
350
RL = 75Ω, IL = 20mA
200
500
250
100 125 150
250
GND Pin Current LT3007-2.5
500
RL = 90Ω, IL = 20mA
75
300
50
RL = 1.2k, IL = 1mA
0
350
100
RL = 12k, IL = 100µA
3007 G13
350
50
GND Pin Current LT3007-1.5
400
350
0
7
25
3007 G12
450
50
6
0
TEMPERATURE (°C)
450
INPUT VOLTAGE (V)
GND PIN CURRENT (µA)
0
–50 –25
100 125 150
400
100
5
75
500
3
4
50
500
6
3
25
3007 G11
GND PIN CURRENT (µA)
LT3007-1.2
LT3007-1.5
LT3007-1.8
LT3007-2.5
LT3007-3.3
LT3007-5
2
2
GND Pin Current LT3007-1.2
27
1
3
TEMPERATURE (°C)
3007 G10
Quiescent Current
30
0
0
GND PIN CURRENT (µA)
4.900
–50 –25
4
1
–8
GND PIN CURRENT (µA)
OUTPUT VOLTAGE (V)
5.075
Adjustable Quiescent Current
10
QUIESCENT CURRENT (µA)
5.100
TA = 25°C, unless otherwise noted.
9
10
3007 G17
RL = 33k, IL = 100µA
50
0
RL = 3.3k, IL = 1mA
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3007 G18
3007f
6
For more information www.linear.com/LT3007
LT3007 Series
TYPICAL PERFORMANCE CHARACTERISTICS
450
GND CURRENT (µA)
GND PIN CURRENT (µA)
RL = 250Ω, IL = 20mA
300
250
200
RL = 500Ω, IL = 10mA
150
100
10
RL = 50k, IL = 100µA
100
50
0
VIN = 3.8V
VOUT = 3.3V
SHDN PIN THRESHOLD (V)
1000
350
SHDN Pin Thresholds
GND Pin Current vs ILOAD
GND Pin Current LT3007-5
500
400
TA = 25°C, unless otherwise noted.
RL = 5k, IL = 1mA
0
1
3 4 5 6 7
INPUT VOLTAGE (V)
2
8
9
1
0.001
10
0.01
0.1
1
10
100
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50 –25
OFF TO ON
ON TO OFF
0
LOAD (mA)
3007 G19
25 50 75 100 125 150
TEMPERATURE (°C)
3007 G21
3007 G20
Current Limit
SHDN Pin Input Current
100
1.8
1.8
90
1.6
80
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
5
10
15 20 25 30 35
SHDN PIN VOLTAGE (V)
1.4
1.2
1
VSHDN = 45V
0.8
0.6
40 45
0
INPUT RIPPLE REJECTION (dB)
REVERSE OUTPUT CURRENT (µA)
25
20
15
ADJ
5
0
–50 –25
OUT
0
25 50 75 100 125 150
TEMPERATURE (°C)
3007 G25
Input Ripple Rejection
VIN = 2.1V + 50mVRMS
VOUT = 600mV
ILOAD = 20mA
80
30
25 50 75 100 125 150
TEMPERATURE (°C)
3007 G24
Input Ripple Rejection
35
0
3007 G23
OUT = ADJ = 1.2V
IN = SHDN = GND
10
30
0
–50 –25
25 50 75 100 125 150
TEMPERATURE (°C)
90
40
VIN = 2V
40
10
Reverse-Output Current
45
50
20
3007 G22
50
60
0.2
0
–50 –25
VIN = 45V
70
0.4
70
60
50
COUT = 10µF
40
30
20
COUT = 2.2µF
10
0
10
100
1000
10000
100000 1000000
FREQUENCY (Hz)
3007 G26
80
70
INPUT RIPPLE REJECTION (dB)
0
CURRENT LIMIT (mA)
2.0
SHDN PIN INPUT CURRENT (µA)
SHDN PIN INPUT CURRENT (µA)
SHDN Pin Input Current
2.0
60
50
40
30
20
10
VIN = VOUT (NOMINAL) + 2V + 0.5VP-P
RIPPLE AT f = 120Hz
ILOAD = 20mA
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
3007 G27
3007f
For more information www.linear.com/LT3007
7
LT3007 Series
TYPICAL PERFORMANCE CHARACTERISTICS
4.5
LOAD REGULATION (mV)
4.0
∆IL = 1µA to 20mA
VOUT = 600mV
VIN = 2V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
100
COUT = 2.2µF
ILOAD = 20mA
5V
3.3V
2.5V
1.8V
1.5V
1V
0.6V
10
1
0.1
10
100
1k
10k
FREQUENCY (Hz)
IOUT = 1mA TO 20mA
VIN = 5.5V
VOUT = 5V
COUT = 2.2µF
VOUT
50mV/DIV
500µs/DIV
3007 G31
COUT = 10µF
5V
400
350
3.3V
300
2.5V
250
1.8V
200
1.5V
150
100
1.2V
50
0.6V
0
0.001
0.01
0.1
1
100
10
ILOAD (mA)
3007 G30
Transient Response
Transient Response
IOUT
20mA/DIV
450
3007 G29
3007 G28
VOUT
50mV/DIV
100k
500
OUTPUT NOISE (µVRMS)
5.0
RMS Output Noise
vs Load Current
Output Noise Spectral Density
OUTPUT NOISE SPECTRAL DENSITY (µV√Hz)
Load Regulation
TA = 25°C, unless otherwise noted.
Transient Response (Load Dump)
IOUT = 1mA TO 20mA
VIN = 5.5V
VOUT = 5V
COUT = 10µF
VOUT
50mV/DIV
45V
VOUT = 5V
IOUT = 20mA
COUT = 4.7µF
VIN
10V/DIV
IOUT
20mA/DIV
500µs/DIV
3007 G32
1ms/DIV
12V
3007 G33
3007f
8
For more information www.linear.com/LT3007
LT3007 Series
PIN FUNCTIONS
SHDN (Pin 1): Shutdown. Pulling the SHDN pin low puts
the LT3007 into a low power state and turns the output off.
If unused, tie the SHDN pin to VIN. The LT3007 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): Ground. Connect the bottom of the
resistor divider that sets output voltage directly to GND
for the best regulation.
IN (Pin 5): Input. The IN pin supplies power to the device.
The LT3007 requires a bypass capacitor at IN if the device
is more than six inches away from the main input filter
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 suffice. The LT3007
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
LT3007 acts as if a blocking diode is in series with its
input. No reverse current flows into the LT3007 and no
reverse voltage appears at the load. The device protects
both itself and the load.
NC (Pin 6): No Connect. Pin 6 is an NC pin in the TSOT-23
package. This pin is not tied to any internal circuitry. LTC
recommends that the NC pin be floated for fault tolerant
operation.
OUT (Pin 7): Output. This pin supplies power to the load.
Use a minimum output capacitor of 2.2µF 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 8): Adjust. This pin is the error amplifier’s inverting
terminal. Its 400pA typical input bias current flows 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 44.5V.
SENSE (Pin 8): Sense. For fixed voltage versions of the
LT3007 (LT3007-1.2, LT3007-1.5, LT3007-1.8, LT3007-2.5,
LT3007-3.3, LT3007-5), the SENSE pin is the input to the
error amplifier. Optimum regulation is obtained at the point
where the SENSE pin is connected to the OUT pin of the
regulator. In critical applications, small voltage drops are
caused by the resistance (RP) of PC traces between the
regulator and the load. These may be eliminated by connecting the SENSE pin to the output at the load as shown
in Figure 1 (Kelvin Sense Connection). Note that the voltage drop across the external PC traces add to the dropout
voltage of the regulator. The SENSE pin bias current is
1µA at the nominal rated output voltage. The SENSE pin
can be pulled below ground (as in a dual supply system
where the regulator load is returned to a negative supply)
and still allow the device to start and operate.
IN
OUT
RP
LT3007
VIN
+
SHDN
+
SENSE
LOAD
GND
RP
3007 F01
Figure 1. Kelvin Sense Connection
3007f
For more information www.linear.com/LT3007
9
LT3007 Series
APPLICATIONS INFORMATION
The LT3007 is a low dropout linear regulator with ultralow quiescent current and shutdown. Quiescent current is
extremely low at 3µA and drops well below 1µA in shutdown. The device supplies up to 20mA of output current.
Dropout voltage at 20mA is typically 300mV. The LT3007
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 LT3007 acts as if a blocking diode is in series with its
output and prevents reverse current flow. In applications
where the regulator load returns to a negative supply, the
output can be pulled below ground by as much as 50V
without affecting start-up or normal operation.
current and to insure stability under minimum load conditions. 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.
Specifications 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 –0.5mV typical at
VOUT = 0.6V. At VOUT = 5V, load regulation is:
5V
• (−0.5mV) = −4.17mV
0.6V
Table 1 shows resistor divider values for some common output voltages with a resistor divider current of
about 1µA.
Adjustable Operation
The LT3007 has an output voltage range of 0.6V to 44.5V.
Figure 2 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 400pA at 25°C, flows out
of the pin. Calculate the output voltage using the formula
in Figure 2. 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
VOUT = 600mV • (1 + R2/R1) – (IADJ • R2)
VADJ = 600mV
IADJ = 0.4nA at 25°C
OUTPUT RANGE = 0.6V to 44.5V
Table 1. Output Voltage Resistor Divider Values
IN
VIN
VOUT
R1
R2
1V
604k
402k
1.2V
590k
590k
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
VOUT
OUT
LT3007
SHDN
GND
R2
ADJ
R1
3007 F02
Figure 2. Adjustable Operation
3007f
10
For more information www.linear.com/LT3007
LT3007 Series
APPLICATIONS INFORMATION
Because the ADJ pin is relatively high impedance (depending 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 external 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 significant shifts in output voltage. Appropriate
post-assembly board cleaning measures should 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. A fixed
voltage option in the LT3007 series does not need these
special considerations.
Output Capacitance and Transient Response
The LT3007 is stable with a wide range of output capacitors. The ESR of the output capacitor affects stability, most
notably with small capacitors. Use a minimum output
capacitor of 2.2µF with an ESR of 3Ω or less to prevent
oscillations. The LT3007 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.
20
40
20
X5R
CHANGE IN VALUE (%)
CHANGE IN VALUE (%)
Voltage and temperature coefficients are not the only
sources of problems. Some ceramic capacitors have a
piezoelectric response. A piezoelectric device generates
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10µF
0
–20
–40
–60
Y5V
–80
–100
Give extra consideration to the use of ceramic capacitors.
Manufacturers make ceramic capacitors with a variety of
dielectrics, each with different behavior across temperature
and applied voltage. The most common dielectrics are
specified 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 coefficients as
shown in Figures 3 and 4. 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 significant 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 verified.
–20
–40
2
4
8
6
10 12
DC BIAS VOLTAGE (V)
14
16
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10µF
–100
–50 –25
3007 F03
Figure 3. Ceramic Capacitor DC Bias Characteristics
Y5V
–60
–80
0
X5R
0
50
25
75
0
TEMPERATURE (°C)
100
125
3007 F04
Figure 4. Ceramic Capacitor Temperature Characteristics
3007f
For more information www.linear.com/LT3007
11
LT3007 Series
APPLICATIONS INFORMATION
voltage across its terminals due to mechanical stress,
similar to the way a piezoelectric accelerometer or microphone 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 5’s trace in response to light tapping from a pencil.
Similar vibration induced behavior can masquerade as
increased output voltage noise.
VOUT = 0.6V
COUT = 22µF
ILOAD = 10µA
VOUT
500µV/DIV
100ms/DIV
3007 F05
Figure 5. Noise Resulting from Tapping
on a Ceramic Capacitor
Thermal Considerations
The LT3007’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
Current curves in the Typical Performance Characteristics
section. Power dissipation is equal to the sum of the two
components listed prior.
The LT3007 regulator has internal thermal limiting designed
to protect the device during overload conditions. For continuous normal conditions, do not exceed the maximum
junction temperature rating of 125°C. Carefully consider
all sources of thermal resistance from junction to ambient including other heat sources mounted in proximity to
the LT3007. 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.
The following tables list thermal resistance for several
different board sizes and copper areas. All measurements
were taken in still air on 3/32" FR-4 two-layer boards with
one ounce copper.
PCB layers, copper weight, board layout and thermal vias
affect the resultant thermal resistance. Although Table 2
provides thermal resistance numbers for 2-layer boards
with 1 ounce copper, modern multilayer PCBs provide better performance than found in these tables. For example,
a 4-layer, 1 ounce copper PCB board with three thermal
vias from the three fused TSOT-23 GND pins to inner layer
GND planes achieves 45°C/W thermal resistance. This
is approximately a 30% improvement over the lowest
numbers shown in Table 2.
Table 2: Measured Thermal Resistance for TSOT-23 Package
COPPER AREA
TOPSIDE*
BACKSIDE
BOARD
AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
2500mm2
2500mm2
2500mm2
65°C/W
1000mm2
2500mm2
2500mm2
67°C/W
225mm2
2500mm2
2500mm2
70°C/W
100mm2
2500mm2
2500mm2
75°C/W
50mm2
2500mm2
2500mm2
85°C/W
*Device is mounted on the topside.
Calculating Junction Temperature
Example: Given an output voltage of 3.3V, an input voltage 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?
The power dissipated by the device is equal to:
IOUT(MAX) (VIN(MAX) – VOUT) + IGND (VIN(MAX))
where,
IOUT(MAX) = 20mA
VIN(MAX) = 12.6V
IGND at (IOUT = 20mA, VIN = 12.6V) = 0.3mA
3007f
12
For more information www.linear.com/LT3007
LT3007 Series
APPLICATIONS INFORMATION
P = 20mA(12.6V – 3.3V) + 0.3mA(12.6V) = 189.8mW
The thermal resistance ranges from 65°C/W to 85°C/W
depending on the copper area. So, the junction temperature
rise above ambient approximately equals:
0.1898W(75°C/W) = 14.2°C
The maximum junction temperature equals the maximum
junction temperature rise above ambient plus the maximum
ambient temperature or:
TJ(MAX) = 85°C + 14.2°C = 99.2°C
Protection Features
The LT3007 incorporates several protection features that
make it ideal for use in battery-powered circuits. In addition 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-toinput 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
typical thermal shutdown circuitry temperature threshold
is 160°C.
The IN pin withstands reverse voltages of 50V. The device
limits current flow to less than 30µA (typically less than
1µA) 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 LT3007 incurs no damage if OUT is pulled below
ground. If IN is left open circuit or grounded, OUT can be
pulled below ground by 50V. No current flows from the
pass transistor connected to OUT. However, current flows
in (but is limited by) the resistor divider that sets output
voltage. Current flows 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 LT3007 protects itself by thermal limiting if necessary. In this case, grounding the SHDN pin turns off the
LT3007 and stops OUT from sourcing current.
The LT3007 incurs no damage if the ADJ pin is pulled
above or below ground by 50V. 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 flow back into the output follows the
curve shown in Figure 6.
If the LT3007 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 LT3007 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.
100
90
REVERSE CURRENT (µA)
So,
80
70
ADJ CURRENT
60
50
40
30
20
OUT CURRENT
10
0
1
0
2 3 4 5 6 7 8 9
OUTPUT AND ADJ VOLTAGE (V)
10
3007 F06
Figure 6. Reverse-Output Current
3007f
For more information www.linear.com/LT3007
13
LT3007 Series
APPLICATIONS INFORMATION
Fault Tolerance
The LT3007 regulators tolerate single fault conditions.
Shorting two adjacent pins together or leaving one single
pin floating does not increase VOUT above its regulated value
or cause damage to the LT3007 regulators. However, the
Table 4: Effects of Floating Pins
PIN
NUMBER
1
Table 3: Effects of Pin-to-Pin Shorts
PIN
NUMBERS PIN NAMES EFFECT
1-2
SHDN-GND LT3007 is in Micropower
Shutdown, VOUT is Off
2-3
GND-GND No Effect. Pins 2, 3 and 4
are Normally Tied to GND
3-4
GND-GND No Effect. Pins 2, 3 and 4
are Normally Tied to GND
5-6
IN-NC
No Effect as Long as NC
is Floating
6-7
NC-OUT No Effect as Long as NC
is Floating
7-8
OUT-ADJ VOUT Decreases to 600mV
as the Top Resistor in the
VOUT Divider is Shorted
7-8
OUT-SENSE No Effect as These
Two Pins are Normally
Shorted Together
application circuit must meet the requirements discussed
in this section to achieve this tolerance level. Tables 3 and
4 show the effects that result from shorting adjacent pins
or from a floating pin, respectively.
COMMENT
2
3
4
5
6
7
LT3007 Adjustable
Version
8
LT3007 Fixed
Voltage version.
8
PIN NAME EFFECT
SHDN
LT3007 is in Micropower
Shutdown, VOUT is Off
GND
No Effect as Long as Pins
3 or 4 are Tied to GND
GND
No Effect as Long as Pins
2 or 4 are Tied to GND
GND
No Effect as Long as Pins
2 or 3 are Tied to GND
IN
LT3007 Has No Input
Power, VOUT is Off
NC
No Effect
OUT
VOUT Internal to LT3007
is ≅VIN. VOUT Externally
Decreases to 0V
ADJ
VOUT Decreases to Less
Than Regulated VOUT
SENSE
VOUT Increases to ≅VIN
Unless an External Clamp
is Added
COMMENT
LT3007 Adjustable
Version
LT3007 Fixed
Voltage version.
TYPICAL APPLICATIONS
Keep-Alive Power Supply
NO PROTECTION
DIODES NEEDED!
VIN
12V
IN
1µF
3.3V
OUT
2.2µF
LT3007-3.3
SHDN
LOAD:
SYSTEM MONITOR,
VOLATILE MEMORY, ETC.
SENSE
GND
3007 TA02
Last-Gasp Circuit
VLINE
12V TO 15V
LINE POWER
RLIMIT
IN
SUPERCAP
SENSE
DCHARGE
1µF
OUT
LT3007-5
SHDN
LINE
INTERRUPT
DETECT
5V
PWR
2.2µF
FAULT
GND
TO
MONITORING
CENTER
3007 TA03
SENSE
GND
3007f
14
For more information www.linear.com/LT3007
LT3007 Series
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
TS8 Package
8-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1637 Rev A)
0.40
MAX
2.90 BSC
(NOTE 4)
0.65
REF
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.22 – 0.36
8 PLCS (NOTE 3)
0.65 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
1.95 BSC
TS8 TSOT-23 0710 REV A
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. JEDEC PACKAGE REFERENCE IS MO-193
3007f
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 representation that the interconnection
of its circuits
as described
herein will not infringe on existing patent rights.
For more
information
www.linear.com/LT3007
15
LT3007 Series
TYPICAL APPLICATION
Average Power Savings for Low Duty Cycle Applications
0mA to 10mA Pulsed Load, IN = 12V
Low Duty Cycle Applications
100
IN
1µF
OUT
90
2.2µF
LT3007-3.3
SHDN
SENSE
GND
80
LOW DUTY CYCLE
PULSED LOAD
0mA TO 10mA
3007 TA04a
POWER SAVINGS (%)
VIN
12V
3.3V
70
60
100µA IQ
50
40
30µA IQ
30
20
10
0
0.1
10µA IQ
1
10
DUTY CYCLE (%)
3007 TA04b
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1761
100mA, Low Noise Micropower LDO
VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 20µA, ISD < 1µA, Low Noise: < 20µVRMS ,
Stable with 1µF Ceramic Capacitors, ThinSOTTM Package
LT1762
150mA, Low Noise Micropower LDO
VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 25µA, ISD < 1µA, Low Noise: < 20µVRMS ,
MS8 Package
LT1763
500mA, Low Noise Micropower LDO
VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 30µA, ISD < 1µA, Low Noise: < 20µVRMS ,
S8 Package
LT1764/LT1764A
3A, Low Noise, Fast Transient
Response LDOs
VIN : 2.7V to 20V, VOUT = 1.21V, VDO = 0.34V, IQ = 1mA, ISD < 1µA, Low Noise: < 40µVRMS ,
LT1764A Version Stable with Ceramic Capacitors, DD and TO220-5 Packages
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 , LT1963A Version Stable with Ceramic Capacitors, DD, TO220-5,
SOT223 and S8 Packages
LT3008
20mA, 45V, 3µA IQ Micropower LDO
300mV Dropout Voltage, Low IQ: 3µA, VIN: 2V to 45V, VOUT: 0.6V to 39.5V, ThinSOT and
2mm × 3mm DFN-6 Packages
LT3009
20mA, 3µA IQ Micropower LDO
VIN : 1.6V to 20V, Low IQ: 3µA, VDO = 0.28V, 2mm × 2mm DFN and SC70-8 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
LT3080/LT3080-1
1.1A, Parallelable, Low Noise,
Low Dropout Linear Regulator
300mV Dropout Voltage (2-Supply Operation), Low Noise: 40µVRMS, VIN: 1.2V to 36V,
VOUT: 0V to 35.7V, Current-Based Reference with 1-Resistor VOUT Set; Directly Parallelable
(No Op Amp Required), Stable with Ceramic Caps, TO-220, SOT-223, MSOP and 3mm ×
3mm DFN Packages; LT3080-1 Version Has Integrated Internal Ballast Resistor
LT3085
500mA, Parallelable, Low Noise,
Low Dropout Linear Regulator
275mV Dropout Voltage (2-Supply Operation), Low Noise: 40µVRMS , VIN: 1.2V to 36V,
VOUT: 0V to 35.7V, Current-Based Reference with 1-Resistor VOUT Set; Directly Parallelable
(No Op Amp Required), Stable with Ceramic Caps, MSOP-8 and 2mm × 3mm DFN Packages
3007f
16
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
For more information www.linear.com/LT3007
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com/LT3007
LT 0313 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2013