Details, datasheet, quote on part number: SP6641B
PartSP6641B
CategoryPower Management => Regulators => Boost Regulators
TitleBoost Regulators
DescriptionIout = 90mA ;; Vin Min. = 0.9V ;; Vin Max. = 4.5V ;; Fixed Outputs = 3.3V, 5.0V ;; Output Range = 3.3V ;; Iq = 10µA ;; Efficiency = 87% ;; Package = 5 Pin SOT-23
CompanySipex Corporation
DatasheetDownload SP6641B datasheet
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Features, Applications

s Ultra Low Quiescent Current: 10A s Wide Input Voltage Range: s 90mA IOUT at 1.3V Input s 500mA IOUT at 2.6V Input s 100mA IOUT at 2.0V Input s 500mA IOUT at 3.3V Input (SP6641B-5.0V) s Fixed or 5.0V Output Voltage to 87% Efficiency s 0.3 NFET RDSon s Startup Voltage Guaranteed s 0.33A Inductor Current Limit s 1A Inductor Current Limit (SP6641B) s Logic Shutdown Control s SOT-23-5 Package

APPLICATIONS s PDA's s DSC's s CD/MP3 Players s Pagers s Digital Cameras s Portable Handheld Medical Devices

DESCRIPTION The 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 PDA's, MP3 players, and other handheld portable devices. The SP6641 features a 10A quiescent current, a 0.3 Nchannel charging switch, 0.9V input startup, and or 1.0A inductor current limiting feature. The SP6641 is offered 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 a 1nA active LOW shutdown pin.

These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. LX, VOUT, SHDN, VBATT to GND pin....... 6.0V LX Current.......................................................... 1.5A Reverse VBATT Current................................... 220mA Storage Temperature........................ to 150C Operating Temperature..................... to +85C Lead Temperature (Soldering, 10 sec).......... 300 C

VBATT = VSHDN = 1.3V, ILOAD 0mA, -40C <TA < +85C, VOUT or +5.0V preset, typical values at 27C unless otherwise noted. PARAMETER Input Voltage Operating Range, VBATT Startup Voltage, VBATT Output Voltage, VOUT Quiescent Current into VOUT, IQ(OUT) Quiescent Current into VBATT, IQB Shutdown Current into VOUT, ISHDN Shutdown Current into VBATT, ISHDN Inductor Current Limit (SP6641A) Inductor Current Limit (SP6641B) Output Current (SP6641AEK-3.3) Output Current (SP6641BEK-3.3) Output Current (SP6641AEK-5.0) Output Current (SP6641BEK-5.0) Minimum Off-Time Constant KOFF NMOS Switch Resistance SHDN Input Voltage Vil Vih SHDN Input Current MIN TYP MAX UNITS nA mA V*s % nA VBATT =1.3V VBATT =2.6V VBATT =1.3V VBATT =2.6V VBATT =2.0V VBATT =3.3V VBATT =2.0V VBATT =3.3V TOFF KOFF / (VOUT VIN) % of VBATT % of VBATT CONDITIONS after startup =27C RLOAD=3k,-40C <TA +85C 3.3V VOUT preset 5.0V VOUT preset VOUT=3.5V, 3.3V VOUT preset VOUT=5.5V, 5.0V VOUT preset VOUT=3.5V, 3.3V VOUT preset VOUT=5.5V, 5.0V VOUT preset VSHDN =0V VSHDN =0V

PIN NO. 1 PIN NAME LX DESCRIPTION Inductor switching node. Connect one terminal of the inductor to the positive terminal of the battery. Connect the second terminal of the inductor to this pin. The inductor charging current flows into LX, through the internal charging N-channel FET, and out through the GND pin. Ground pin. The internal regulator bias currents and the inductor charging current flows out of this pin. Output voltage sense pin, internal regulator voltage supply, and minimum off-time one shot input. Kelvin connect this pin to the positive terminal of the output capacitor, but for SP6641B, use 10 series resistor and 1F bypass per Figure 1 schematic. Shutdown. Tie this pin to VBATT for normal operation. Tie this pin the ground to disable all circuitry inside the chip. In shutdown mode, the output voltage will float at a diode drop below the battery potential. Battery voltage pin. The startup circuitry runs off of this pin. The regulating circuitry also uses this voltage to control the minimum offtime. TOFF KOFF / (VOUT VIN).

VBATT VOUT LOAD SU EN OSC VOUT VBATT R TOFF Q CHARGE NGATE M VOUT 1 DRIVER LX

 

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