LT3008 Series
µA I , 20mA, 45V
3
Q
Low Dropout Linear Regulators
FEATURES
DESCRIPTION
The LT®3008 series are micropower, low dropout voltage
(LDO) linear regulators. The devices supply 20mA output
currentwithadropoutvoltageof300mV.No-loadquiescent
current is 3μA. Ground pin current remains at less than
5% of output current as load increases. In shutdown,
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Ultralow Quiescent Current: 3μA
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Input Voltage Range: 2.0V to 45V
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Output Current: 20mA
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Dropout Voltage: 300mV
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Adjustable Output (V
= V
= 600mV)
ADJ
OUT(MIN)
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Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V
Output Tolerance: ±2% Over Load, Line and
Temperature
quiescent current is less than 1μA.
The LT3008 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 reverse-
current protection.
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Stable with Low ESR, Ceramic Output Capacitors
(2.2μF Minimum)
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Shutdown Current: <1μA
Current Limit Protection
Reverse-Battery Protection
Thermal Limit Protection
The LT3008 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 LT3008 is available in the thermally
enhanced 6-lead DFN and 8-lead TSOT-23 packages.
TSOT-23 and 2mm × 2mm DFN Packages
APPLICATIONS
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Automotive
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Low Current Battery-Powered Systems
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Keep-Alive Power Supplies
Remote Monitoring
Utility Meters
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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.
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Low Power Industrial Applications
TYPICAL APPLICATION
3.3V, 20mA Supply with Shutdown
Dropout Voltage/Quiescent Current
500
450
400
350
300
250
200
150
100
50
6
5
4
3
2
1
0
I
= 20mA
LOAD
DROPOUT
VOLTAGE
V
OUT
3.3V
IN
OUT
LT3008-3.3
V
IN
20mA
3.8V TO
45V
2.2μF
1μF
SHDN SENSE
I
Q
GND
3008 TA01a
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
3008 TA01b
3008fc
1