AAT1351 Datasheet, PDF (1/16 Pages) Advanced Analogic Technologies – 2-CHANNEL SWITCHING REGULATOR

Advanced Analog Technology, Inc.
Details are subject to change without notice
AAT1351
2-CHANNEL SWITCHING REGULATOR
FEATURES
z Complete PWM Power Control Circuitry
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
10 kHz to 800 kHz
z V_DD Range 4.0V to 14.0V
PIN CONFIGURATION
TOP VIEW
Ct
1
Rt
2
NE1 3
IE1
4
OE1 5
16 ^VREF
15 SCP
14 NE2
13 IE2
12 OE2
DTC1 6
OUT1 7
GND ⁸
11 _DTC2
10 OUT2
9
V_DD
SOP-16 PACKAGE
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.
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– Advanced Analog Technology, Inc. –
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