Product Brief 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER Description AP3406 Parametric Table The AP3406 is a 1.1MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 650mA load with high efficiency, excellent line and load regulation. The device integrates a main switch and a synchronous switch without an external Schottky diode. It is ideal for powering portable equipment that runs from a single Li-ion battery. A standard series of inductors are available from several different manufacturers optimized for use with the AP3406. This feature greatly simplifies the design of switch-mode power supplies. Input Voltage Range (V) 2.5 to 5.5 Maximum Output Current (Min) (mA) 650 Feedback Voltage (V) 0.6 Oscillator Frequency (MHz) 1.1 Efficiency @200mA (%) VIN=4.2V, VOUT=3.3V 95 VIN=3.6V, VOUT=1.8V 92 This IC is available in TSOT-23-5 and SOT-23-5 packages. Features • • • • • • • • • • Benefits High Efficiency: up to 95% Output Current: 650mA Input Voltage Range: 2.5V to 5.5V Fixed 1.1MHz Frequency Current Mode Control 100% Duty Cycle in Dropout Built-in Short Circuit Protection Built-in Thermal Shutdown Function Built-in Current Limit Function Shutdown Current: <1µA • • • Additional Available Materials • • • • • • Applications • • • • High Efficiency High Output Current Easy to Use GPS WiFi Card Portable Media Player Digital Still and Video Cameras Jun. 2008 Samples Preliminary Datasheet Demo Board Demo Board Manual Application Note ESD Report BCD Semiconductor Manufacturing Limited 1 Product Brief 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406 Pin Configuration TSOT-23-5/SOT-23-5 EN 1 GND 2 SW 3 5 FB 4 VIN Ordering Information Example Package Temperature Range Part Number Marking ID Green Green Packing Type TSOT-23-5 -40 to 85°C AP3406KT-ADJTRG1 L1B Tape & Reel SOT-23-5 -40 to 85°C AP3406K-ADJTRG1 FBC Tape & Reel Detailed information please refer to the relevant datasheet. Sales Office: Shanghai No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Tel : 86-21-24162266 Fax : 86-21-24162277 USA 30920 Huntwood Ave. Hayward, CA 94544, USA Tel : +1-510-324-2988 Fax : +1-510-324-2788 Taiwan 4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel : 886-2-2656-2808 Fax : 886-2-2656-2806 Shenzhen Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel : 86-755-8826 7951 Fax : 86-755-8826 7865 Jun. 2008 BCD Semiconductor Manufacturing Limited 2