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AAT1105A

Advanced Analog Technology
Part Number AAT1105A
Manufacturer Advanced Analog Technology
Description BUCK BOOST AND BOOST PWM CONTROLLER
Published Aug 28, 2008
Detailed Description Advanced Analog Technology, Inc. AAT1105A Details are subject to change without notice. BUCK_BOOST & BOOST PWM CONTROLL...
Datasheet PDF File AAT1105A PDF File

AAT1105A
AAT1105A

Overview
Advanced Analog Technology, Inc.
AAT1105A Details are subject to change without notice.
BUCK_BOOST & BOOST PWM CONTROLLER Features www.
DataSheet4U.
com z Complete General Description PWM Power Control Circuitry CH1: Buck_Boost, CH2: Boost z z z z z z z z Under-Voltage Lockout (UVLO) Protection Totem Pole Output Output Short Circuit Protection Dead-Time Control¡G 0% to 100% Wide Operating Frequency¡G 10kHz to 800kHz Shutdown Control Power Good Protection VDD Range: 2.
6V~6.
5V Pin Configuration TOP VIEW Ct Rt SHDN IE1 OE1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VREF SCP PGO IE2 OE2 DTC2 OUT2 VDD 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.
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AAT1105A Pin Description Pin No Name Ct 1 2 3 4 www.
DataSheet4U.
com 5 6 7 8 9 10 11 12 13 14 15 16 Rt SHDN IE1 OE1 DTC1 OUT1 GND VDD OUT2 DTC2 OE2 IE2 PGO SCP VREF I/O Description - Exte...


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