SSPP66668822 HHiigghh EEffffiicciieennccyy WWhhiittee LLEEDD CChhaarrggee PPuummpp RReegguullaattoorr February 2009 Rev. 2.0.0 GENERAL DESCRIPTION APPLICATIONS The SP6682 is a current regulated charge Mobile Phones & PDAs pump ideal for converting a Li-Ion battery 3.3V to 5V Conversion input for driving white LEDs used in backlighting color displays or cell phone Palmtop Computers camera flash applications. Color LCD Modules The charge pump automatically switches between x1.5 and x2 modes based on the FEATURES program-mable VMODE voltage, providing improved efficiency over traditional methods 200mA Output Current using charge pump doubler followed by LDO. Low Profile Inductorless Regulator This input voltage threshold can be externally 600KHz Oscillator programmed by a resistor divider network for optimized efficiency at specific output voltages x1.5 and x2 Conversion Modes and currents. 2.7V to 5.5V Input Voltage Range The SP6682 operates with an internal 600kHz Fast Turn-on Time 175s clock, which reduces switching noise and improves V ripple. Output current or 1mA Quiescent Current OUT voltage can be accurately regulated by Adjustable Output Current and Voltage modulating the switcher between the charge pump and output capacitor. In shutdown PWM Dimming Control mode, the IC disconnects the output from the True Shutdown Disconnect input and draws less than 1.5A current. Soft Start The SP6682 is offered in a 10-pin MSOP package, and a small 10-Pin DFN Package. 10-pin MSOP and 10-pin DFN Packages TYPICAL APPLICATION DIAGRAM Fig. 1: SP6682 LCD Backlighting Application Diagram Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 Fax. +1 510 668-7001 SSPP66668822 HHiigghh EEffffiicciieennccyy WWhhiittee LLEEDD CChhaarrggee PPuummpp RReegguullaattoorr ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those Output Current I ............................................ 300mA OUT indicated in the operation sections of the specifications Power Dissipation (10-pin MSOP) below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect (derated 8.84mW/C above +70C).....................720mW reliability. Junction Temperature Range .............................. +125C Storage Temperature ..............................-65C to 150C V , V , V , EN/PWM ............................-0.3V to 6.0V IN MODE OUT ESD Rating (HBM - Human Body Model) ....................2kV V - V .............................................................. 0.7V IN OUT ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Ambient Temperature of T = 25C only limits applying over the full A Operating Ambient Temperature range are denoted by a . Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T = 25C, and are provided A for reference purposes only. Unless otherwise indicated, V = 2.7V to 5.0V, C =C =C =C =2.2F (ceramic, ESR=0.03 ), IN 1 2 4 5 C =0.1F (ceramic), T = 40C to 85C. 3 A Parameter Min. Typ. Max. Units Conditions Input Voltage 2.7 5.5 V Quiescent Current 1.2 3 mA V =4.2V, V =3.6V, I =100 A IN OUT OUT Shutdown Current 1.5 A EN/PWM=0V, V =5.5V IN Oscillator Frequency 0.42 0.60 0.78 MHz V =3.6V IN VFB Reference Voltage 0.275 0.306 0.337 V FB=0V, V =3.6V, I =20mA, IN OUT Charge Pump Output Resistence 11 18 V =High MODE V Threshold Voltage 1.15 1.25 1.35 V V falling 25C MODE IN Hysteresis for Mode Transition 30 mV V = 3.6V 25C PP IN Voltage V Pin Current 0.01 0.5 A V =1.25V MODE MODE EN/PWM Logic Low 0.4 V EN/PWM Logic High 1.6 V EN/PWM Pin Current 0.01 0.5 A V =4.2V EN/PWM FB Pin Current 0.5 A V =1V FB V Turn-On Time 175 500 s V =3.6V, FB within 90% regulation OUT IN PIN ASSIGNEMENT Fig. 2: SP6682 Pin Assignement 2009 Exar Corporation 2/13 Rev. 2.0.0