TPS70448PWP datasheet(10/40 Pages) TI

Part #	TPS70448PWP

Description	DUAL-OUTPUT, LOW DROPOUT VOLTAGE REGULATORS WITH INTEGRATED SVS FOR SPLIT VOLTAGE SYSTEMS

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Manufacturer	TI [Texas Instruments]

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t

PG2

Output

VIN2

t

VIT+

(seeNoteA)

VOUT2

V

(seeNoteA)

Threshold

Voltage

IT-

NOTEA:

V

tripvoltageistypically5%lowerthantheoutputvoltage(95%V ).V

toV

isthehysteresisvoltage.

IT

-

O

IT+

TPS70445, TPS70448

TPS70451, TPS70458

TPS70402

SLVS307F – SEPTEMBER 2000 – REVISED APRIL 2010

www.ti.com

PG2 Timing Diagram (assuming VIN1 already powered up)

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

NO.

EN1

6

I

Active low enable for VOUT1

EN2

7

I

Active low enable for VOUT2

GND

9

—

Ground

GND/HEATSI

1, 12, 13, 24

—

Ground/heatsink

NK

MR

5

I

Manual reset input, active low, pulled up internally

NC

4, 17, 20

—

No connection

PG1

19

O

Open drain output, low when VOUT1 voltage is less than 95% of the nominal regulated voltage

PG2

18

O

Open drain output, low when VOUT2 voltage is less than 95% of the nominal regulated voltage

RESET

8

O

Open drain output, SVS (power-on reset) signal, active low

VIN1

2, 3

I

Input voltage of regulator 1

VIN2

10, 11

I

Input voltage of regulator 2

VOUT1

22, 23

O

Output voltage of regulator 1

VOUT2

14, 15

O

Output voltage of regulator 2

VSENSE1/FB1

21

I

Regulator 1 output voltage sense/regulator 1 feedback for adjustable

VSENSE2/FB2

16

I

Regulator 2 output voltage sense/regulator 2 feedback for adjustable

10

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