FEATURES

? Wide input voltage range: 4.2V to 28V

? 2A output current

? 0.8V reference voltage

? Low RDS(ON) integrated power MOSFET

(180/110mΩ)

? 3μA(Max) shutdown current

? Integrated internal compensation

? High efficiency at light load

? Internal 1ms soft-start

? Cycle-by-cycle current limit

? Over-temperature protection with auto recovery

? Under voltage lockout(UVLO)

? Hiccup short circuit protection

? Available in PSOP8 package

DESCRIPTION

The A7322 is a fully integrated, synchronous rectified

step-down converter that provides wide 4.2V to 28V

input voltage range and 2A continuous load current

capability. The A7322 can operate at PFM mode to

achieve high efficiency and reduce power loss at light

load. In shutdown mode, the Max supply current is

about 3μA.

The A7322 protection function includes cycle-by-cycle

current limit, UVLO and thermal shutdown. Besides,

internal soft-start prevents inrush current at fast poweron.

This device uses slope compensated current mode

control which provides fast load transient response.

Internal loop compensation function reduces the

external compensator components and simplifies the

design process.

APPLICATION

? Distributed power system

? Flat panel television and monitors

? STB (set-top-box)

? Networking, XDSL modem