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AAT1107

Advanced Analog Technology
Part Number AAT1107
Manufacturer Advanced Analog Technology
Description BUCK BOOST & BOOST PWM CONTROLLER
Published Aug 28, 2008
Detailed Description Advanced Analog Technology, Inc. AAT1107 Details are subject to change without notice. BUCK_BOOST & BOOST PWM CONTROLLE...
Datasheet PDF File AAT1107 PDF File

AAT1107
AAT1107

Overview
Advanced Analog Technology, Inc.
AAT1107 Details are subject to change without notice.
BUCK_BOOST & BOOST PWM CONTROLLER WITH ADJUSTABLE LDO www.
DataSheet4U.
com FEATURES z z z Complete PWM Power Control Circuitry CH1: Buck_Boost, CH2: Boost Adjustable Low Dropout (LDO) Regulator Under-Voltage Lockout (UVLO) Protection Totem Pole Output Output Short Circuit Protection Dead Time Control : 0% to 100% Wide Operating Frequency: 10kHz to 800kHz GENERAL DESCRIPTION The AAT1107 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 the specific applications.
Each channel contains its own error amplifier, PWM comparator, dead-time control (DTC) and output driver.
The two channels share common features of under-voltage protection, oscillator, short circuit protection and voltage reference circuit.
Two dead-time control inputs are assigned for channel (CH1) and channel 2 (CH2) individually, and dead-time control inputs can be used to control on/off operation.
The AAT1107 contains one step-up (boost) circuit at CH2 and one inverting (buck_boost) circuit at CH1.
In addition, DTC can be set to provide 0% to 100% dead-time through a resistive divider network and soft-start can be implemented by paralleling the DTC resistor with a capacitor.
The Maximum output current of LDO regulator can be enlarged by connecting an nMOSFET (or NPN bipolar) as a source follower stage at OUT3 pin.
z z z z PIN CONFIGURATION TOP VIEW Ct Rt IE3 IE1 OE1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VREF SCP OUT3 IE2 OE2 DTC2 OUT2 VDD TSSOP-16 PACKAGE ¥ ÆWÃþ¤ñ¬ì§ÞªÑ¥÷¦³-½q – – x – Advanced Analog Technology, Inc.
– Page 1 of 16 V 1.
0 Advanced Analog Technology, Inc.
AAT1107 PIN DESCRIPTION Pin No 1 2 3 www.
DataSheet4U.
com 4 5 6 7 8 9 10 11 12 13 14 15 16 Name Ct Rt IE3 IE1 OE1 DTC1 OUT1 GND VDD OUT2 DTC2 OE2 IE2 NE2 SCP VREF I/O Descript...


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