DATA SHEET AAT3113/3114 High Efficiency 1.5X Fractional Charge Pumps for White LED Applications General Description Features The AAT3113 and AAT3114 are low noise, constant fre- AAT3113: Four Outputs quency charge pump DC/DC converters that use frac- AAT3114: Six Outputs tional (1.5X) conversion to increase efficiency in white 20mA Full-Scale Current 2 LED applications. The devices can be used to produce Simple Serial Control (S Cwire) Interface current levels up to 20mA for each output from a 2.7V 32-Position Logarithmic Scale with Digital Control to 5.5V input. A low external parts count (two 1F flying Low Noise Constant Frequency Operation capacitors and two small bypass capacitors at V and 33% Less Input Current Than Doubler Charge Pump IN OUT) makes these devices ideally suited for small, bat- High Accuracy Brightness Matching tery-powered applications. Small Application Circuit Regulated Output Current 2 Skyworks Simple Serial Control (S Cwire) interface is Automatic Soft Start used to enable, disable, and set the LED drive current for V Range: 2.7V to 5.5V IN 32-level logarithmic scale LED brightness control. No Inductors AAT3113 and AAT3114 devices have a thermal manage- 600kHz Switching Frequency ment system for protection in the event of a short-circuit I <1A in Shutdown Q condition on any of the output pins. Built-in soft-start Temperature Range: -40C to 85C circuitry prevents excessive inrush current during start- 12-Pin TSOPJW Package (AAT3113) up. A high switching frequency enables the use of small 16-Pin QFN Package (AAT3114) external capacitors. A low-current shutdown feature dis- connects the load from V and reduces quiescent current IN to less than 1A. The AAT3113 provides four LED current Applications source outputs, and the AAT3114 provides six. The Programmable Current Source AAT3113 is available in a Pb-free 12-pin TSOPJW pack- White LED Backlighting age, and the AAT3114 is available in a Pb-free 16-pin QFN package. Typical Application VIN VIN C1+ C1+ C1 C1 1F 1F C1- C1- OUT OUT C2+ C2+ C C C C IN OUT C2 IN OUT C2 V V BATTERY AAT3113 BATTERY AAT3114 1F 1F 1F 1F 1F 1F C2- C2- D1 D1 D2 D2 D3 D3 D4 D4 EN/SET EN/SET EN/SET EN/SET D5 D6 GND D4 D3 D2 D1 GND D6 D5 D4 D3 D2 D1 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 202128B Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. April 16, 2013 DI SC O N TI N U E D13 8 NC NC 14 7 VIN C1- 15 6 C1+ EN/SET 16 5 D6 D1 DATA SHEET AAT3113/3114 High Efficiency 1.5X Fractional Charge Pumps for White LED Applications Pin Descriptions Pin Number AAT3114 AAT3113 Symbol Function 1 7 D2 Current source output 2. If not used, leave pin oating. 2 6 D3 Current source output 3. If not used, leave pin oating. 3 5 D4 Current source output 4. If not used, leave pin oating. 4 N/A D5 Current source output 5. If not used, leave pin oating. 5 N/A D6 Current source output 6. If not used, leave pin oating. 6 4 C1+ Flying capacitor 1 positive terminal. 7 3 C1- Flying capacitor 1 negative terminal. 8 N/A NC No connect. 9 2 OUT Charge pump output. Requires 1F bypass capacitor to ground. 10 1 C2+ Flying capacitor 2 positive terminal. 11 12 C2- Flying capacitor 2 negative terminal. 12 11 GND Ground. 13 N/A NC No connect. 14 10 VIN Input power supply. Requires 1F bypass capacitor to ground. 2 15 9 EN/SET Control pin using S Cwire serial interface. Current source output 1. Required reference current source. Do not leave pin 16 8 D1 oating. EP Exposed paddle (bottom) connect to GND directly beneath package. Pin Configuration TSOPJW-12 QFN44-16 (Top View) (Top View) AAT3113 AAT3114 1 12 C2+ C2- 1 12 2 11 D2 GND OUT GND 3 10 C1- VIN 2 11 D3 C2- 4 9 C1+ EN/SET 3 10 5 8 D4 C2+ D4 D1 6 7 D3 D2 4 9 D5 OUT Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 202128B Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. April 16, 2013 DI SC O N TI N U E D