L3380
DESCRIPTION
The L3380 is PWM step up DC-DC switching controller that operates from 0.9V. The low start up input voltage makes L3380 specially designed for powering portable equipment from one or two cells battery packs. This device consist of a soft start circuit, a reference voltage source, an error amplifier, an oscillator, a phase pensation, a PWM controller and an output drive circuit for driving external power transistor. Additionally, a chip enable feature is provided to power down the converter for extended battery life. The device features a voltage mode PWM control loop, providing stable and high efficiency operation over a broad load current range.
2 1
CMOS IC
5 4
SOT-25
- Pb-free plating product number: L3380L
FEATURES
- 0.9V low start-up Input voltage at 1m A load
- Low operation current
- 0.5u A low shutdown current
- Fix requency PWM at 100KHZ ..
- Built in PWM switching control circuit ,duty ratio is 0~83%
- Output voltage:0.1V step setting is available between...
