7404 datasheet(1/11 Pages) STMICROELECTRONICS

Part #	7404

Description	TRIPLE VOLTAGE REGULATOR

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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November 2000

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ONLY TWO CELL NEED AS INPUT

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THREE REGULATED OUTPUT

1) HIGH EFFICENCY PFM DC/DC

CONVERTER 3.3V AT 200mA (87%

EFFICENCY)

2) VERY LOW NOISE AND VERY LOW

DROP VREG (3V AT 20mA)

3) VERY LOW NOISE AAND VERY LOW

DROP VREG (1.9V AT 20mA)

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LOGIC CONTROLLED ELECTRONIC

SHUTDOWN

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LOW BATTERY DETECTOR

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VIRTUAL GND PIN

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TEMPERATURA RANGE: -40 TO 85°C

ST3M01

TRIPLE VOLTAGE REGULATOR

SHDN

DC/DC

Linear A

Linear B

IN_Linear

OUT DC/DC

OUT LA

OUT LB

150 µF

1 µF

15 µH

DC/DC

Ref

Vref

Lx

Virtual GND

100 nF

GND_SW

-

+

GND_Signal

IN_SW

Vin

150 µF

1 µF

1 K

Ω

LBO

On-Mode

Off-Mode

SCHEMATIC DIAGRAM

SO-14

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