LR8421 Datasheet - LRC

LR8421 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 LESHAN RADIO COMPANY, LTD. LR8421 Series INTRODUCTION: The LR8421 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 .

LR8421 Features

* z Up to 90% Efficiency at IOUT=2A VOUT=5V from 3.3V Input z Low Device Quiescent Current: 70ȝA (Max) z Guaranteed 2.5A Output Current at VOUT=5V from 3.3V Input z 500kHz PWM Switching Frequency z Synchronous and Embedded Power MOSFETs; No Schottky Diode Required z Low RDS(ON) (main switch/synchrono

LR8421-LRC.pdf