Global Mixed-mode Technology Inc.
AT1793
2-Channel Step-Down PWM Controller
Features
4.75V to 26V supply voltage operating.
Efficiency up to 85%.
Typical frequency operation to 1MHz.
Voltage-mode PWM step-down regulation.
1V±2% internal reference.
Shutdown current less than 30uA.
Soft-start built-in.
Short-circuit protection build-in
TQFN3X3-16 & SOP-14 package.
General Description
AT1793 is a voltage-mode PWM step-down controller
capable of driving loads over a wide input supply
range with excellent line and load regulation charac-
teristics. High efficiency is obtained through the use of
a low Rds(on) P-channel power switch.
It uses a fixed switching frequency up to 1MHz thus
allowing smaller sized components. The output volt-
age level is user-programmable via an external resis-
tive voltage divider. The built-in soft-start can reduce
inrush current on the input source at turn on. The
built-in short-circuit protection can prevent from a
short-circuit.
The AT1793 also has built-in 2 control pins that can
power down the regulator to a shutdown mode. In
shutdown mode the regulator draws less than 30uA of
supply current
AT1793 is available in TQFN3X3-16 or SOP-14 package
Applications
DC-DC power management.
Ordering Information
Part number
AT1793N_GRE_VER E
Package
Marking
QFN16,Green
▲▲▲▲▲▲E,
Date Code
Version E
SOP14,Green
AT1793S_GRE_VER E
▲▲▲▲▲▲E,
Date Code with one bottom line
Version E
*For more marking information, contact our sales representative directly
Pin Configuration
Ver: 1.0E
Apr 23, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
