LT3008 Series
3µA IQ, 20mA, 45V
Low Dropout Linear Regulators
FEATURES
DESCRIPTION
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The LT®3008 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.
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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 and 2mm × 2mm DFN Packages
APPLICATIONS
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Automotive
Low Current Battery-Powered Systems
Keep-Alive Power Supplies
Remote Monitoring
Utility Meters
Low Power Industrial Applications
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 reversecurrent 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.
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.
TYPICAL APPLICATION
3.3V, 20mA Supply with Shutdown
Dropout Voltage/Quiescent Current
500
OUT
2.2μF
1μF
VOUT
3.3V
20mA
LT3008-3.3
SHDN
SENSE
GND
3008 TA01a
DROPOUT VOLTAGE (mV)
IN
6
ILOAD = 20mA
DROPOUT
VOLTAGE
400
350
5
4
300
250
IQ
3
200
2
150
100
QUIESCENT CURRENT (μA)
VIN
3.8V TO
45V
450
1
50
0
–50 –25
0
0
25 50 75 100 125 150
TEMPERATURE (°C)
3008 TA01b
3008fc
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