austriamicrosystems AS3681 Product Brief Power & Lighting Management Unit 1 General Description ! The AS3681 is a highly-integrated, ultra-flexible CMOS Power- and Lighting Management Unit to supply power to LCD- and camera-modules in mobile telephones, and other 1-cell Li+ or 3-cell NIMH powered devices. The AS3681 incorporates one low-power, low-dropout regulator (LDO), one Step Up DC/DC Converter for white backlight LEDs, one high-power Charge Pump for camera flash LEDs, one Analog-to-Digital Converter, support for up to 11 current sinks, a serial interface, and control logic all onto a single die. ! The linear analog regulator features extremely high analog performance regarding: ! ! ! ! Noise (< 30µVrms from 100Hz to 100kHz) ! Line/load Regulation (<1mV Static and <20mV Transient) Power Supply Rejection (>70dB@1kHz) Ultra-Low Power Consumption (1µA Shutdown, 6µA Standby) ! LDO output voltages and output currents are programmable via a serial interface. 2 Key Features ! ! ! Supports up to 11 Current Sinks - Three Programmable (4-bit) from: 10 to 150mA resp. 300mA - Two Programmable (4-bit) from: 2.5 to 37.5 mA - Three Programmable (4-bit) from: 2.5 to 37.5 mA for RGB LEDs - Three Programmable (4-bit) from: 2.5 to 37.5mA for General Purpose Applications - Programmable Hardware Control (Strobe, PWM) - Selectively Enable/Disable Current Sinks 10-bit Successive Approximation ADC - 11µs Conversion Time - Two Selectable Inputs: GPIO0 and GPIO1 Four General Purpose Inputs/Outputs - Digital Input, Digital Output, and Tristate - Programmable Pull-Up, and Pull-Down - GPIO2 can be used as Camera Flash Strobe Negative or High-Voltage Charge Pump - Regulated Output Voltage, Programmable by Dual Resistors e.g. -6V, 10mA for OLED or ±15V, 5mA for TFT - ± 5% Accuracy - Requires Few External Components Standby LDO - Regulated 2.5V - Maximum Output Current 10mA - Always On (Supplies Internal Digital Blocks) - 3µA Quiescent Current Programmable High-Performance Regulator - Low-Noise LDO (1.8 to 3.4V, 100mA) - 2.8V Default Output Voltage after Power-up - 3µA Quiescent Current in Standby (Iout <5mA) - Turns On/Off with Rising/Falling Edge of GPIO Supply Voltage - Programmable via Serial Interface ! ! Wide Battery Supply Range: 3.0 to 5.5V High-Efficiency Step Up DC/DC Converter - Up to 25V/50mA for White LEDs - Programmable Output Voltage with External Resistors and Serial Interface ! Serial Interface Control ! On-Chip Bandgap Tuning for High Accuracy (±1%) ! Overcurrent and Thermal Protection High-Efficiency High-Power Charge Pump - 1:1, 1.5:1 and 2:1 Mode - Output Current up to 400mA - Efficiency up to 95% - Only 4 External Capacitors Required: 2 x 1µF Flying Capacitors, 2 x 2.2µF Input/Output Capacitors - Supports LCD White Backlight LEDs, Camera Flash White LEDs, and Keypad Backlight LEDs ! ! 32-Pin, Small Form-Factor QFN Package (5 x 5 x 1mm, 0.5mm pitch), Enhanced Thermal Characteristics 1 Watt Power Dissipation @ TAmbient = 70ºC 3 Application Power- and lighting-management for mobile telephones and other 1-cell Li+ or 3-cell NiMH powered devices. © 1997-2004, austriamicrosystems USA, Inc. 8601 Six Forks Road, Suite 400 Raleigh,NC 27615 USA. All Rights Reserved. www.austriamicrosystems.com Revision 1.0 1-4 austriam i c r o systems AS368 1 Product Bri ef 4 Block Diagrams Figure 1. Option (by software): Step Up DC/DC Converter (Pins 23, 24, 28, 29) and External Charge Pump (Pins 25, 26, 27). Battery R2 0.15Ω SENSE_P 24 23 SENSE_N 10µH, 5x5x1.2mm SD12-100 Coiltronics AS3681 Power Management Unit 28 C2 1µF VANA 22 R3 1MΩ C10 1.5µF R4 100kΩ C11 15nF DCDC_FB 21 LDO 1.85-3.4V 150mA C9 2.2µF D1 Q1 29 VBAT3 DCDC_GATE Step Up DC/DC Converter Battery 6 VBAT1 3 VBAT2 4 C2_P 2 C2_N LDO e.g. 2.8V C3 2.2µF V2_5 2.5V Charge Pump 30 1:1, 1.5:1, 2:1 C4 1µF RBIAS R1 240kΩ CREF C5 2.2µF Bandgap and VREF 32 400mA 31 C6 1µF White LEDs Backlight 7 C1_P 8 C1_N 5 CPOUT OLED_FB Feedback 25 C15 2.2µF OLED2 D2 27 D4 10 CURR31 11 CURR32 19 CURR1 20 CURR2 18 CLK 17 DATA 1 ADDR D8 C8 2.2µF O-LED Charge Pump C12 100nF D3 CURR30 D7 Pulse Skip R5 600kΩ -6V 10mA 9 D14 D11 Camera Flash Module C1 100nF Current Sinks 10-150mA D13 D10 D12 C7 1µF D6 D9 OLED1 26 Current Sinks 2.5-37.5mA C13 100nF C14 100nF D5 CLK Serial Interface GPIO/ ADC R6 1-10kΩ VDD_G Device Address Selector 16 15 13 12 GPIO0 GPIO1 GPIO2 GPIO3 14 30 VDD_G Exposed Pad © 1997-2004, austriamicrosystems USA, Inc. 8601 Six Forks Road, Suite 400 Raleigh,NC 27615 USA. All Rights Reserved. www.austriamicrosystems.com Revision 1.0 2-4 austriam i c r o systems AS368 1 Product Bri ef Figure 2. Option (by software): General Purpose Current Sinks (Pins 23, 24, 28, 29) and External Charge Pump (Pins 25, 26, 27). CURR53 24 23 CURR52 D18 AS3681 Power Management Unit 28 D19 CURR51 NC 29 CURR4 D20 VBAT3 C2 1µF VANA 21 Current Sinks 2.5-37.5mA LDO 1.85-3.4V 150mA 22 Battery 6 VBAT1 3 VBAT2 4 C2_P 2 C2_N 7 C1_P 8 C1_N 5 CPOUT LDO e.g. 2.8V C3 2.2µF V2_5 2.5V Charge Pump 30 1:1, 1.5:1, 2:1 C4 1µF RBIAS R1 240kΩ CREF Bandgap and VREF 32 400mA 31 C1 100nF Current Sinks 10-150mA Current Sinks 2.5-37.5mA CP_OUT or VBAT RGB LEDs D15 D16 D17 RGB1 25 RGB2 27 RGB3 26 C5 2.2µF Current SInks 2.5-37.5mA C6 1µF C7 1µF Camera Flash Module D6 9 CURR30 10 CURR31 11 CURR32 19 CURR1 20 CURR2 D7 D8 C8 2.2µF D21 D22 Serial Interface GPIO/ ADC 18 CLK 17 DATA 1 ADDR VDD_G R6 1-10kΩ Device Address Selector 16 15 13 12 GPIO0 GPIO1 GPIO2 GPIO3 14 VDD_GP 30 Exposed Pad © 1997-2004, austriamicrosystems USA, Inc. 8601 Six Forks Road, Suite 400 Raleigh,NC 27615 USA. All Rights Reserved. www.austriamicrosystems.com Revision 1.0 3-4 austriam i c r o systems AS368 1 Product Bri ef Copyrights Copyright © 1997-2004, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 e-mail: [email protected] For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com a u s t r i am i c r o s y s t e m s – a leap ahead in mixed signal © 1997-2004, austriamicrosystems USA, Inc. 8601 Six Forks Road, Suite 400 Raleigh,NC 27615 USA. All Rights Reserved. www.austriamicrosystems.com Revision 1.0 4-4