General Description

LA8521 is a voltage mode, step-down DC-DC

converter that is designed to meet 5A output

current, and utilizes PWM control scheme that

switches with 300KHz fixed frequency.

The input voltage range of LA8521 is from 3.6V

to 23V, and available in adjustable output

voltage from 0.8V to VIN. The supply current is

only 3mA during operation and under 1uA in

shutdown.

This device provides an enable function that

can be controlled by external logic signal. It

also provides excellent regulation during line

or load transient. Other features of current

limit, thermal shutdown protection, and short

circuit protection are also included. Due to the

low RDS(ON) of the internal power MOSFET, this

device provides high efficiency step-down

applications. It can also operate with a

maximum duty cycle of 100% for use in low

drop-out conditions. The package is available

in standard ESOP-8.

Features

l Adjustable Output Voltage from 0.8V to VIN

l 3.6V to 23V Input Voltage Range

l Continuous 5A Output Capability

l 300KHz Oscillation Frequency

l 0.8V Reference Voltage

l 1uA Low Shutdown Current

l 3mA Low Supply Current

l 100% Duty Cycle

l Built-in Low RDS(ON) Power MOSFET

l No External Compensation Required

l Adjustable Current Limit

l Short Circuit Protection

l Thermal Shutdown Protection

l ESOP-8 Package

l Meet RoHS Standard

Applications

l Broadband Communication Device

l LCD TV / Monitor

l Storage Device

l Wireless Application