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AS3693A QFN48
Table of Contents
austria micro systems
1
2
3
4
5
General Description ....................................................................................................................................... 1
Key Features.................................................................................................................................................. 1
Applications.................................................................................................................................................... 1
Block Diagram................................................................................................................................................ 2
Characteristics ............................................................................................................................................... 4
5.1
5.2
5.3
Absolute Maximum Ratings .................................................................................................................... 4
Operating Conditions .............................................................................................................................. 5
Electrical Characteristics......................................................................................................................... 5
6
Typical Operation Characteristics .................................................................................................................. 7
6.1
6.2
6.3
6.4
Output current vs Output Voltage ........................................................................................................... 7
Vsupply vs VREG and V2.5 at startup .................................................................................................... 7
9us Slew Rate ......................................................................................................................................... 8
Supply Regulation ................................................................................................................................... 8
7
Block Description ........................................................................................................................................... 9
7.1
Feedback Circuit ..................................................................................................................................... 9
7.1.1
7.1.2
Feedback Selection ....................................................................................................................... 10
Voltage fault registers .................................................................................................................... 11
7.2
7.3
Curreg 1-16........................................................................................................................................... 11
PWM – modes ...................................................................................................................................... 13
7.3.1
7.3.2
7.3.3
SYNC mode (PWM_MODE = 00) .................................................................................................. 13
ASYNC – mode (PWM_MODE = 01) ............................................................................................ 14
SIGMA DELTA – mode (PWM_MODE = 10) ................................................................................. 15
7.4
7.5
PWM – high time, period and delay registers ....................................................................................... 16
Shunt Regulator .................................................................................................................................... 17
7.5.1
Undervoltage lockout ..................................................................................................................... 17
7.6
7.7
Over temperature control ...................................................................................................................... 17
Device address setup ........................................................................................................................... 18
7.7.1
7.7.2
I2C Device Address setup ............................................................................................................. 18
SPI Device Address setup ............................................................................................................. 18
7.8
Digital interface ..................................................................................................................................... 19
7.8.1
7.8.2
I2C interface .................................................................................................................................. 19
SPI interface .................................................................................................................................. 21
8
9
Register map................................................................................................................................................ 23
Pinout and Packaging .................................................................................................................................. 26
9.1
9.2
9.3
9.4
Pinout.................................................................................................................................................... 26
Package drawing QFN48, 6x6mm, 0.4mm pitch .................................................................................. 28
Package drawing QFN48, 7x7mm, 0.5mm pitch .................................................................................. 31
Package Drawing MLF48...................................................................................................................... 34
10 Ordering Information .................................................................................................................................... 38
Copyright............................................................................................................................................................. 39
Disclaimer ........................................................................................................................................................... 39
Contact Information ............................................................................................................................................. 39
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Revision 1.14 / 2010
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