Advanced Analog Technology, Inc.


– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, Inc. –
Page 1 of 14 V1.0
AAT1343
Details are subject to change without notice

2-CHANNEL SWITCHING REGULATOR

FEATURES
z Complete PWM Power Control Circuitry
z Precision Reference： 2.5V ± 1% (25
o
C)
z Under-Voltage Lockout (UVLO) Protection
z Open Drain Output
z Output Short Circuit Protection
z Low Dissipation Current： 1.6mA
z Dead-Time Control： 0 % to 100%
z Wide Operating Frequency：
10kHz to 800kHz
z
DD
VRange： 4.0V to 14.0V

PIN CONFIGURATION

1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IE1
OE1
DTC1
GND
OUT1
V
REF
NE2
SCP
IE2
OE2
DTC2
OUT2
TOP VIEW
NE1
V
DD
TSSOP-16 PACKAGE
R
t
C
t
GENERAL DESCRIPTION
The AAT1343 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 these
two channels.
Both channels of AAT1343 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 minimal number of external components, the
AAT1343 offers a simple and cost effective
solution.