LT3012B_15 Datasheet, PDF (1/16 Pages) Linear Technology – 250mA, 4V to 80V Low Dropout Micropower Linear Regulator

LT3012B
250mA, 4V to 80V
Low Dropout
Micropower Linear Regulator
FEATURES
■ _{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}
■ _{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
U
APPLICATIO S
■ _{Low Current High Voltage Regulators}
■ _{Regulator for Battery-Powered Systems}
■ _{Telecom Applications}
■ _{Automotive Applications}
DESCRIPTIO
The LT^®3012B 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. De-
signed for use in battery-powered or high voltage sys-
tems, the low quiescent current (40µA operating) makes
the LT3012B an ideal choice. Quiescent current is also well
controlled in dropout.
Other features of the LT3012B include the ability to oper-
ate with very small output capacitors. The regulators are
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 regula-
tors. 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 LT3012B regulator is avail-
able 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
V_IN
5.4V TO
80V
5V Supply
IN
OUT
LT3012B
1µF
ADJ
GND
750k
V_OUT
5V
250mA
3.3µF
249k
3012B TA01
400
350
300
250
200
150
100
50
0
0
Dropout Voltage
50 100 150 200 250
OUTPUT CURRENT (mA)
3012B TA02
3012bf
1