Document
Advanced Analog Technology, Inc.
AAT1403A
Details are subject to change without notice
SIX-CHANNEL DIGITAL STILL CAMERA POWER SUPPLY
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FEATURES
GENERAL DESCRIPTION
The AAT1403A provides an integrated six-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC converter; this device offers system engineer flexibility to tailor-make the power supply circuitry for specific applications. Each channel contains its own error amplifier, PWM comparator, dead-time control and output driver. The under-voltage protection, oscillator, short circuit protection and voltage reference circuit are the common features for the six channels. In addition to two boost conversions and one inverting conversion, AAT1403A also has three synchronous rectifiers.
z Complete PWM Power Control Circuitry z Input Voltage Range: 1.4V to 6.5V z Low Start-Up Voltage: 1.4V (CH6) z Separate On/Off Control for CH1~CH6 z Supports Synchronous Boost Rectification (CH6) z Supports Synchronous Buck Rectification (CH1, 5) z Supports Boost Conversion (CH2, 4) z Supports White LED Driver (CH4) z Supports Inverting Conversion (CH3) z Totem Pole Output z Short Circuit Protection z VQFN40 and LQFP48 Package z Oscillator Frequency: 500 kHz (±15%)
APPLICATIONS
z Digital Cameras z CCD Imaging Devices z Camcorders
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Page 1 of 27 V1.0
Advanced Analog Technology, Inc.
AAT1403A
PIN CONFIGURATION
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(VQFN-40)
(LQFP-48)
FUNCTION TABLE
Condition SD − SD1= “Lo” SD1= “Hi” SD2= “Lo” SD2= “Hi” SD3= “Lo” SD3= “Hi” SD4= “Lo” SD4= “Hi” SD5= “Lo” SD5= “Hi” SD6= “Lo” SD6= “Hi” Channel Status CH1 Off On Off On Off On Off On Off On Off On CH2 CH3 CH4 CH5 CH6
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Page 2 of 27 V1.0
Advanced Analog Technology, Inc.
AAT1403A
PIN DESCRIPTION (VQFN-40)
Pin No
1 2 3 4 www.DataSheet4U.com 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Name
SD1 SD5 SD6 IE1 IE5 IE6 DTC1 OE1 DTC5 OE5 DTC6 OE6 VB GND
I/O Function
I I I I I I I O I O I O O P P O I I I I I I I O O O I I I O O O O P O O O O O ON/OFF Control for Channel 1 (CH1) ON/OFF Control for Channel 5 (CH5) ON/OFF Control for Channel 6 (CH6) Inverted Input for Error Amplifier 1 (EA1) Inverted Input for Error Amplifier 5 (EA5 Inverted Input for Error Amplifier 6 (EA6) Dead Time Control of Channel 1 (CH1) Output for Error Amplifier 1 (EA1) Dead Time Control of Channel 5 (CH5) Output for Error Amplifier 5 (EA5) Dead Time Control of Channel 6 (CH6) Output for Error Amplifier 6 (EA6) Reference Voltage 2.77V Output Ground Power Supply Reference Voltage 1.26V Output Short Circuit Protect Capacitor Connection Pin ON/OFF Control for Channel 4 (CH4) ON/OFF Control for Channel 3 (CH3) ON/OFF Control for Channel 2 (CH2) Inverted Input 2 for Error Amplifier 4 (EA4) Inverted Input for Error Amplifier 4 (EA4) Inverted Input for Error Amplifier 3 (EA.