TS3420

TS3420 2A, 1.25MHz Synchronous Buck Converter SOT-26 Pin Definition: 1. EN 2. Ground 3. Switching Output 4. Input 5. Ground 6. Feedback General Description TS3420 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version. Supply current with no load is 200uA and drops to <1uA in shutdown. The 2.8V to 5.5V input voltage range makes TS3420 ideally suited for single Li-Ion, two to three AA battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Switching frequency is internally set at 1.25MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and decreases need of an external schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. Features ● ● ● ● ● ● ● ● ● ● High Efficiency: Up to 96% 2.8V to 5.5V Input Voltage Range Output Voltage from 0.6V to VIN Short Circuit Protection (SCP) Build in Soft-Start Function 1.25MHz Constant Frequency Operation Up to 2A Output Current No Schottky Diode Required in Application ≤1uA Shutdown Current Current Mode Operation for Excellent Line and Load Transient Response Application ● ● ● ● Cellular Phones Digital Still Cameras Portable Electronics USB Devices Pin Description Name EN GND SW VCC FB Description Power-off pin H：normal operation L：Step-down operation stop...