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SP6642EU

Single Alkaline Cell, High Efficiency Step-Up DC-DC Converter

Signal Processing Technologies 

ABSOLUTE MAXIMUM RATINGS

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.

VBATT to GND.............................................-0.3 to 6.0V

VOUT to GND..............................................-0.3 to 6.0V

LX, SHDN, FB, BATTLO, PFO to GND....-0.3 to 6.0V

PFI to GND...............................................-0.3 to 6.0V

Reverse battery Current, TAMB=+25OC.............220mA

(NOTE 1)

VBATT forward current............................................0.5A

VOUT, LX current......................................................1A

Storage Temperature Range............-65˚C to +165˚C

Lead Temperature (soldering 10s)..................+300˚C

Operating Temperature.......................-40˚C to +85˚C

Power Dissipation Per Package

8-pin µSOIC (derate 4.85mW/OC above +70OC)..........390mW

SPECIFICATIONS

V = V = 1.3V, I = 0mA, FB = GND, T = -40OC to +85OC, and typical values are at T = +25OC unless otherwise noted.

BATT

SHDN

LOAD

AMB

AMB

PARAMETER

MIN. TYP. MAX. UNITS

CONDITIONS

Minimum Operating Input Voltage, VBATT(MIN)

Maximum Operating Input Voltage, VBATT(MAX)

Start-Up Input Voltage (VBATT), NOTE 2

Start-Up Input Voltage (V ), Temperature Coefficient

BATT

0.85

0.2

0.75

-2

1.65

V RL=3kΩ

V

V

RL=3kΩ,TAMB=+25OC

mV/OC

SHDN Input Voltage

VIL

VIH

SHDN Input Current

FB Input Current

FB Set Voltage, VFB

PFI Input Current

PFI Trip Voltage

BATTLO Trip Voltage

Output Voltage, VOUT

Output Voltage Range

N-Channel On-Resistance

P-Channel On-Resistance

P-Channel Catch-Diode Voltage

20

80

10

10

1.215 1.262 1.309

10

590 614 632

0.96 1.00 1.04

3.16 3.30 3.44

2.0

5.5

0.6 1.5

0.8 2.2

0.8

% % of VBATT for the SP6642

% of VBATT for the SP6642

nA SP6642

nA VFB=1.3V

V external feedback

nA VPFI=650mV

mV falling PFI,hysteresis=1%

V VOUT = 3.3V, hysteresis = 2%, SP6643

V

VFB<0.1V

V external feedback

Ω

VOUT=3.3V

Ω

VOUT=3.3V

V IDIODE=100mA,P-Channel switch off

Rev. 10-6-00

SP6642/6643 High Efficiency Step-Up DC-DC Converter

2

© Copyright 2000 Sipex Corporation

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