Agamem Microelectronics Inc. PRELIMINARY AA18375 SWITCHING REGULATOR CONTROLLER DESCRIPTION The AA18375 is a two-channel PWM DC-DC converter control IC that features low-voltage operation. This IC can obtain the step-up, step-down and inverting voltages with a small number of external components. Because the IC is compactly packaged, it is best suited for use as a power supply in portable equipment. FEATURES • Wide supply voltage range: 3.6 V to 15 V • Low current consumption: 1.6 mA typical • Control in a wide output frequency range is possible (1 KHz to 500 KHz) • Timer latch, short-circuit protection circuit is built in • Circuit to prevent malfunction during low input voltage is built in • Built-in reference voltage (1.28V) output pin • Dead time period is adjustable over the whole range of duty ratio • Synchronization operation is possible APPLICATIONS • LCD Displays • PDAs • Digital Still Cameras • Hand-held and portable instruments BLOCK DIAGRAM 5 6 6(7 &/5 4 4 ©Copyright Agamem Microelectronics Inc. 1 www.agamem.com.tw 2009/06/02 Ver 1.0 AGAMEM MICROELECTRONICS INCORPORATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.