Advanced Analog Technology, Inc.
AAT1351
Details are subject to change without notice
2-CHANNEL SWITCHING REGULATOR
FEATURES
Complete PWM Power Control Circuitry
Under-Voltage Lockout (UVLO) Protection
Open Drain Output
Output Short Circuit Protection
Low Dissipation Current:1.6mA
Dead-Time Control:0% to 100%
Wide Operating Frequency:
10 kHz to 800 kHz
GENERAL DESCRIPTION
The AAT1351 provides an integrated two-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system; this device offers
the systems engineer flexibility to tailor-make the
power supply circuitry for specific applications.
Each channel contains its own error amplifier,
PWM comparator, dead–time control (DTC) and
output driver. The under-voltage protection,
oscillator, short circuit protection and voltage
reference circuit are the common features for the
two channels.
Both channels of AAT1351 can be used for DC-DC
converter operations including step-up, step-down,
and inverting. Dead-time control can be set to
provide 0% to 100% dead-time through a resistive
divider network. Soft-start can be implemented by
paralleling the DTC resistor with a capacitor. Two
dead-time control inputs are assigned for channel 1
(CH1) and channel 2 (CH2) individually, and dead-
time control inputs can be used to control on / off
operation.
With a minimum number of external components,
the AAT1351 offers a simple and cost effective
solution.
V
DD
Range
:
4.0V to 14.0V
PIN CONFIGURATION
TOP VIEW
C
t
R
t
NE1
IE1
OE1
DTC1
OUT1
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
REF
SCP
NE2
IE2
OE2
DTC2
OUT2
V
DD
SOP-16 PACKAGE
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台灣類比科技股�½有限公司
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Advanced Analog Technology, Inc
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