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AAT2845 Datasheet(PDF) 2 Page - Advanced Analogic Technologies |
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AAT2845 Datasheet(HTML) 2 Page - Advanced Analogic Technologies |
2 / 19 page AAT2845 Four-Channel Backlight Driver with Dual LDOs 2 2845.2006.12.1.0 Pin Descriptions Pin Configuration TQFN34-20 (Top View) 1 3 2 5 4 6 16 14 15 12 13 11 D2 D1 LDOB IN PGND IN C1+ EN/SET C1- OUT ENLDO D4 Pin # Symbol Function 1 D2 Current sink input #2. 2 D1 Current sink input #1. 3 LDOB Output of LDO B. Connect a 2.2µF or larger ceramic capacitor to ground. 4 IN Input power supply for charge pump. Requires a 1µF or larger ceramic capacitor connected between this pin and ground. 5 PGND Power ground. 6 IN Input power pin for both LDOs. Connect a 1µF or larger ceramic capacitor from this pin to PGND. 7 FBA Feedback pin of LDO A. Regulated at 1.2V. 8 LDOA Output of LDO A. Connect a 2.2µF or larger ceramic capacitor to ground. 9 C2- Flying capacitor 2 negative terminal. 10 C2+ Flying capacitor 2 positive terminal. Connect a 1µF ceramic capacitor between C2+ and C2-. 11 OUT Charge pump output to drive load circuit. Connect a 1µF or larger ceramic capacitor between this pin and PGND. 12 C1- Flying capacitor 1 negative terminal. 13 C1+ Flying capacitor 1 positive terminal. Connect a 1µF ceramic capacitor between C1+ and C1-. 14 EN/SET S2Cwire control pin for backlighting. 15 ENLDO Enable pin for LDO A and B. 16 D4 Current sink input #4. 17 D3 Current sink input #3. 18 GND Ground. 19 CBP Bypass pin for the internal reference. 20 FBB Feedback pin of LDO B. Regulated at 1.2V. Connect a 0.1µF ceramic capacitor from this pin to GND. EP Exposed paddle (bottom); connect to PGND as closely as possible to the device. |
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