Datasheet LT3012B (Analog Devices)

LT3012B 250mA, 4V to 80V Low Dropout Micropower Linear Regulator
U FEATURES DESCRIPTIO
■
Wide Input Voltage Range: 4V to 80V
The LT®3012B is a high voltage, micropower low dropout ■
Low Quiescent Current: 40
µ
A
linear regulator. The device is capable of supplying 250mA ■
Low Dropout Voltage: 400mV
of output current with a dropout voltage of 400mV. De- ■
Output Current: 250mA
signed for use in battery-powered or high voltage sys- ■ No Protection Diodes Needed tems, the low quiescent current (40µA operating) makes ■ Adjustable Output from 1.24V to 60V the LT3012B an ideal choice. Quiescent current is also well ■ Stable with 3.3µF Output Capacitor controlled in dropout. ■ Stable with Aluminum, Tantalum or Ceramic Other features of the LT3012B include the ability to oper- Capacitors ate with very small output capacitors. The regulators are ■ Reverse-Battery Protection stable with only 3.3µF on the output while most older ■ No Reverse Current Flow from Output to Input devices require between 10µF and 100µF for stability. ■ Thermal Limiting Small ceramic capacitors can be used without any need for ■ Thermally Enhanced 16-Lead TSSOP and 12-Pin series resistance (ESR) as is common with other regula- (4mm × 3mm) DFN Packages tors. Internal protection circuitry includes reverse-battery
U
protection, current limiting, thermal limiting and reverse
APPLICATIO S
current protection. ■ Low Current High Voltage Regulators The device is available with an adjustable output with a ■ Regulator for Battery-Powered Systems 1.24V reference voltage. The LT3012B regulator is avail- ■ Telecom Applications able in the 16-lead TSSOP and 12 pin low profile (0.75mm) ■ Automotive Applications (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.
U TYPICAL APPLICATIO Dropout Voltage
400
5V Supply
350 V 300 OUT IN OUT 5V V 250 IN 250mA LT3012B 5.4V TO 750k 1µF 3.3µF 80V 200 ADJ GND 249k 150 DROPOUT VOLTAGE (mV) 100 3012B TA01 50 0 0 50 100 150 200 250 OUTPUT CURRENT (mA) 3012B TA02 3012bf 1