LT3012
250mA, 4V to 80V
Low Dropout
Micropower Linear Regulator
DESCRIPTION
FEATURES
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Wide Input Voltage Range: 4V to 80V
Low Quiescent Current: 40μA
Low Dropout Voltage: 400mV
Output Current: 250mA
No Protection Diodes Needed
Adjustable Output from 1.24V to 60V
1μA Quiescent Current in Shutdown
Stable with 3.3μF Output Capacitor
Stable with Aluminum, Tantalum or Ceramic
Capacitors
Reverse-Battery Protection
No Reverse Current Flow from Output to Input
Thermal Limiting
Thermally Enhanced 16-Lead TSSOP and
12-Pin (4mm × 3mm) DFN Packages
APPLICATIONS
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The LT®3012 is a high voltage, micropower low dropout
linear regulator. The device is capable of supplying 250mA of
output current with a dropout voltage of 400mV. Designed
for use in battery-powered or high voltage systems, the low
quiescent current (40μA operating and 1μA in shutdown)
makes the LT3012 an ideal choice. Quiescent current is
also well controlled in dropout.
Other features of the LT3012 include the ability to operate
with very small output capacitors. The regulator is stable
with only 3.3μF on the output while most older devices
require between 10μF and 100μF for stability. Small ceramic capacitors can be used without any need for series
resistance (ESR) as is common with other regulators.
Internal protection circuitry includes reverse-battery
protection, current limiting, thermal limiting and reverse
current protection.
The device is available with an adjustable output with a
1.24V reference voltage. The LT3012 regulator is available
in the 16-lead TSSOP and 12 pin low profile (0.75mm)
(4mm × 3mm) DFN packages with an exposed pad for
enhanced thermal handling capability.
Low Current High Voltage Regulators
Regulator for Battery-Powered Systems
Telecom Applications
Automotive Applications
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
5V Supply with Shutdown
Dropout Voltage
400
VIN
5.4V TO
80V
LT3012
1μF
VOUT
5V
250mA
OUT
SHDN
GND
750k
3.3μF
ADJ
249k
3012 TA01
VSHDN
<0.3V
>2.0V
OUTPUT
OFF
ON
350
DROPOUT VOLTAGE (mV)
IN
300
250
200
150
100
50
0
0
50
100
150
200
OUTPUT CURRENT (mA)
250
3012 TA02
3012fd
1
