LT3012 Datasheet, PDF (1/16 Pages) Linear Technology – 250mA, 4V to 80V Low Dropout Micropower Linear Regulator

FEATURES
n _{Wide Input Voltage Range: 4V to 80V}
n _{Low Quiescent Current: 40μA}
n _{Low Dropout Voltage: 400mV}
n _{Output Current: 250mA}
n _{No Protection Diodes Needed}
n _{Adjustable Output from 1.24V to 60V}
n _{1μA Quiescent Current in Shutdown}
n _{Stable with 3.3μF Output Capacitor}
n _{Stable with Aluminum, Tantalum or Ceramic}
Capacitors
n _{Reverse-Battery Protection}
n _{No Reverse Current Flow from Output to Input}
n _{Thermal Limiting}
n _{Thermally Enhanced 16-Lead TSSOP and}
12-Pin (4mm × 3mm) DFN Packages
APPLICATIONS
n _{Low Current High Voltage Regulators}
n _{Regulator for Battery-Powered Systems}
n _{Telecom Applications}
n _{Automotive Applications}
LT3012
250mA, 4V to 80V
Low Dropout
Micropower Linear Regulator
DESCRIPTION
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 ce-
ramic 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.
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
V_IN
5.4V TO
80V
IN
OUT
LT3012
1μF
SHDN ADJ
GND
V_SHDN
<0.3V
>2.0V
OUTPUT
OFF
ON
750k
V_OUT
5V
250mA
3.3μF
249k
3012 TA01
400
350
300
250
200
150
100
50
0
0
Dropout Voltage
50 100 150 200 250
OUTPUT CURRENT (mA)
3012 TA02
3012fd
1