SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23 Ultra Low Quiescent Current: 10A Wide Input Voltage Range: 0.9V to 4.5V V LX 1 5 BATT 90mA I at 1.3V Input (SP6641A-3.3V) OUT SP6641 500mA I at 2.6V Input (SP6641B-3.3V) OUT GND 2 5 Pin SOT-23 100mA I at 2.0V Input (SP6641A-5.0V) OUT SHDN V 3 4 OUT 500mA I at 3.3V Input (SP6641B-5.0V) OUT Fixed 3.3V or 5.0V Output Voltage Up to 87% Efficiency 0.3 NFET R on APPLICATIONS DS Startup Voltage Guaranteed at 0.9V PDA s 0.33A Inductor Current Limit (SP6641A) DSC s 1A Inductor Current Limit (SP6641B) CD/MP3 Players Logic Shutdown Control Pagers SOT-23-5 Package Digital Cameras Portable Handheld Medical Devices Now Available in Lead Free Packaging DESCRIPTION The SP6641 is an ultra-low quiescent current, high efficiency, DC-DC boost converter designed for single and dual cell alkaline, or Li-ion battery applications found in PDAs, MP3 players, and other handheld portable devices. The SP6641 features a 10A quiescent current, a 0.3 N- channel charging switch, 0.9V input startup, and a 0.33A or 1.0A inductor current limiting feature. The SP6641 is offered in a 5 pin SOT-23 package and provides an extremely small power supply footprint optimized for portable applications. The SP6641 is preset to 3.3V and can be controlled by a 1nA active LOW shutdown pin. L1 0.9V to 4.5V 700 V BATT 650 600 C1 1 LX V 5 BATT 550 500 2 GND U1 D1 450 SP6641A SP6641B, 1.0A, 3.3V 4 400 3 V OUT SHDN SHDN SP6641B, 1.0A, 5V 350 SP6641A, 0.33A, 3.3V 300 C3 R1 SP6641A, 0.33A, 5V 250 200 V OUT 150 +3.3V or 5V C2 100 50 SP6641A 3.3V & 5V: C1 = C2 = 22F Ceramic, L1 = 22H CDRH5D28, 0 D1 = MBR0520, C3 = Open, R1 = Shorted. 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 SP6641B 3.3V & 5V: C1 = C2 = 100F POSCAP, L1 = 10H CDRH5D28, D1 = ZHCS2000, C3 = 1F Ceramic, R1 = 10 . V (V) IN Figure 1. Typical Application Schematic Figure 2. Maximum Load Current in Operation Rev. 5/26/05, *Patent Pending SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23 Copyright 2002 Sipex Corporation 1 I (mA) OUTABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional LX, V , SHDN, V to GND pin ....... -0.3 to 6.0V OUT BATT operation of the device at these ratings or any other LX Current .......................................................... 1.5A above those indicated in the operation sections of Reverse V Current ................................... 220mA BATT the specifications below is not implied. Exposure to Storage Temperature ........................ -65C to 150C absolute maximum rating conditions for extended Operating Temperature ..................... -40C to +85C periods of time may affect reliability. Lead Temperature (Soldering, 10 sec) .......... 300 C ELECTRICAL SPECIFICATIONS V = V = 1.3V, I = 0mA, -40C <T < +85C, V = +3.3V or +5.0V preset, typical values at 27C BATT SHDN LOAD A OUT unless otherwise noted. PARAMETER MIN TYP MAX UNITS CONDITIONS Input Voltage Operating Range, 0.5 4.5 V after startup V BATT Startup Voltage, V 0.85 0.90 V R =3k, T =27C BATT LOAD A 1.00 V R =3k,-40C <T < +85C LOAD A Output Voltage, V 3.16 3.30 3.44 V 3.3V V preset OUT OUT 4.80 5.00 5.20 V 5.0V V preset OUT Quiescent Current into V,1015 AV =3.5V, 3.3V V preset OUT OUT OUT I V =5.5V, 5.0V V preset Q(OUT) OUT OUT Quiescent Current into V , 250 500 nA V =3.5V, 3.3V V preset BATT OUT OUT I V =5.5V, 5.0V V preset QB OUT OUT Shutdown Current into V,1 500 nA V =0V OUT SHDN I SHDN Shutdown Current into V,20 100 nA V =0V BATT SHDN I SHDN Inductor Current Limit 280 330 380 mA (SP6641A) Inductor Current Limit 850 1000 1150 mA (SP6641B) Output Current (SP6641AEK-3.3) 90 mA V =1.3V BATT 190 mA V =2.6V BATT Output Current (SP6641BEK-3.3) 200 mA V =1.3V BATT 500 mA V =2.6V BATT Output Current (SP6641AEK-5.0) 100 mA V =2.0V BATT 175 mA V =3.3V BATT Output Current (SP6641BEK-5.0) 275 mA V =2.0V BATT 500 mA V =3.3V BATT Minimum Off-Time Constant 1.50 V*sT K / (V V ) OFF OFF OUT IN K OFF NMOS Switch Resistance 0.3 0.75 Inmos=100mA SHDN Input Voltage Vil 20 % % of V BATT Vih 80 % % of V BATT SHDN Input Current 1 100 nA Rev. 5/26/05, *Patent Pending SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23 Copyright 2002 Sipex Corporation 2