Advanced Analog Technology, Inc.
AAT1105A
Details are subject to change without notice.
BUCK_BOOST & BOOST PWM CONTROLLER
Features
Complete PWM Power Control Circuitry
CH1: Buck_Boost, CH2: Boost
Under-Voltage Lockout (UVLO) Protection
Totem Pole Output
Output Short Circuit Protection
Dead-Time Control：0% to 100%
Wide Operating Frequency：
10kHz to 800kHz
Shutdown Control
Power Good Protection
General Description
The AAT1105A provides an integrated two-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system. This device
offers system engineers the 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 (SCP) and voltage
reference circuit are the common features for the
two channels.
The AAT1105A contains one step-up (boost) circuit
at channel two (CH2) and one inverting
(buck_boost) circuit at channel one (CH1).
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 CH1 and CH2
individually, and dead-time control inputs can be
used to control on / off operation.
The compact design and optimized external parts of
AAT1105A offers a simple and effective solution.
V
DD
Range: 2.6V~6.5V
Pin Configuration
TOP VIEW
C
t
R
t
SHDN
IE1
OE1
DTC1
OUT1
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
REF
SCP
PGO
IE2
OE2
DTC2
OUT2
V
DD
(TSSOP-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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