CE8421 Datasheet - Chipower

CE8421 500KHz Synchronous Boost Converter

Boost and Rectifying Switch Input. Connect an inductor between this pin and VIN. Keep the PCB trace lengths as short and wide as is practical I to reduce EMI and voltage overshoot. If the inductor current falls to zero, or pin CE is low, an internal anti-ringing switch is connected from this pi.

5A, 500KHz Synchronous Boost Converter with Output Disconnect CE8421 Series INTRODUCTION: The CE8421 devices provide a power supply solution for products powered by either a one-cell Li-Ion or Li-polymer, or a two to three-cell alkaline, NiCd or NiMH battery. The converter generates a stable output voltage that is adjusted by an external resistor divider. It provides high efficient power conversion and is capable of delivering output currents up to 2.1A at 5V at a supply voltage down to .

CE8421 Features

* Up to 90% Efficiency at IOUT=2A VOU T=5V from 3.3V Input

* Low Device Quiescent Current: 70μA (Max)

* Guaranteed 2.5A Output Current at VOUT=5V from 3.3V Input

* 500kHz PWM Switching Frequency

* Synchronous and Embedded Power MOSFETs; No Schottky Diode Required

* Low RDS(O

CE8421-Chipower.pdf