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A8603 Datasheet(PDF) 4 Page - Allegro MicroSystems |
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A8603 Datasheet(HTML) 4 Page - Allegro MicroSystems |
4 / 42 page Multiple-Output Regulator for Automotive LCD Displays A8603 4 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Terminal List Table Number Name Function 1 VIN Input supply voltage (3 to 10 V) for the IC 2 FAULT Open-drain output, pulls low in case of error condition 3 EN Enable pin for enabling the IC; system can only be enabled after VIN is above UVLO level (refer to Startup Timing Diagram) 4 VCOM Output from internal low-dropout (LDO) regulator (item 2 in Functional Block Diagram) powered by AVDD 5 GNDVCOM Ground reference for VCOM; connect to ground plane 6 NC No Connect (reserved for Test Mode); connect to GND in actual PCB 7 SCL I2C clock signal 8 SDA I2C data signal 9 ADDR I2C address selection (up to 4 physical IC addresses based on voltage level) 10 FSET Input for synchronizing boost and charge pump signals switching frequency to external clock signal; alternatively, it can be connected to an external resistor to set the switching frequency 11 BIAS Output from internal 2.8 V bias regulator; connect to GND via 1 μF ceramic capacitor for decoupling 12 COMP Compensation pin, connect to external COMP components (RZ and CZ) 13 AVDD Output from internal LDO (item 1 in Functional Block Diagram) powered by VOUT 14 AGND Analog GND reference for signals; connect to ground plane 15 VGL Inverted charge pump output (item 3 in Functional Block Diagram) 16 CP22 Capacitor terminals for inverted charge pump (item 3 in Functional Block Diagram) 17 CP21 18 VGH 2× charge pump output (item 4 in Functional Block Diagram) 19 VGH3 3× charge pump output (item 4 in Functional Block Diagram) 20 CP11 Capacitor terminals for charge pump (item 4 in Functional Block Diagram) 21 CP12 22 VOUT Connect to boost output for internal LDO and charge pump regulators 23 PGND Power ground for internal boost switch; connect this pin to ground terminal of output ceramic capacitor(s) 24 SW Internal boost converter switch node – PAD Package ES, 24-Pin QFN Pinouts 1 EN 2 VCOM 3 GNDVCOM 4 5 6 NC AVDD AGND 13 VGL 14 CP22 15 CP21 16 VGH 17 18 VIN FAULT PAD PINOUT DIAGRAMS AND TERMINAL LIST TABLE |
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