AA18380

www.DataSheet4U.com Agamem Microelectronics Inc. PRELIMINARY OVERVIEW AA18380 Switching Regulator Controller The AA18380 is a single-channel PWM DC-DC regulator control IC that supports low-voltage operation. This IC features a low minimum operating voltage of 1.8 V and low current consumption, is optimal for use in high-efficiency power supplies for portable electronic equipment. FEATURES Wide operating supply voltage range: 1.8 V to 15 V Stable reference voltage circuit: 1.25V. Low current consumption: Typically 5.5 mA in operation, 1 µA or less in stand-by Wide PWM output frequency range: 10 kHz to 1 MHz Incorporates a soft start circuit and adjustable soft start time. Timer latch short-circuit protection circuit (SCP). Low input voltage malfunction prevention circuit (U.V.L.O.) On/off control function Totem-pole type output by using an external resistor to set the output current (for NPN transistors) PIN Configuration (TOP VIEW) INSCP VCC BR/CTL 1 2 3 4 8 FB 7 OSC 6 GND 5 OUT APPLICATIONS LCD Displays PDAs Digital Still Cameras Hand-held and portable instruments ©Copyright Agamem Microelectronics Inc. 1 www.agamem.com.tw 2007/1/15 www.DataSheet4U.com Agamem Microelectronics Inc. PRELIMINARY PIN DESCRIPTIONS Pin No. 1 2 3 4 5 6 7 8 Symbol INSCP VCC BR/CTL OUT GND OSC FB I/O I — — I O — — O AA18380 Switching Regulator Controller Description Internal error amplifier inverting input pin Soft start and short circuit protection setting ca...