SI91871DMP-22-T1 datasheet(2/9 Pages) VISHAY

Part #	SI91871DMP-22-T1

Description	300-mA Ultra Low-Noise LDO Regulator With Discharge Option

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Manufacturer	VISHAY [Vishay Siliconix]

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Si91871

Vishay Siliconix

New Product

www.vishay.com

2

Document Number: 72012

S-03156—Rev. B, 03-Feb-03

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings

Input Voltage, VIN to GND

- 6.0 to 6.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VSD (See Detailed Description)

- 0.3 V to VIN

. . . . . . . . . . . . . . . . . . . . . . . . . .

Output Current, IOUT

Short Circuit Protected

. . . . . . . . . . . . . . . . . . . . . . . . . .

Output Voltage, VOUT

-0.3 V to VIN + 0.3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package Power Dissipation, (Pd)b

2.3 W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Thermal Resistance (

qJA)a

55

_C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

R(qJA)a

8

_C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maximum Junction Temperature, TJ(max)

150

_C

. . . . . . . . . . . . . . . . . . . . . . .

Storage Temperature, TSTG

-65

_C to 150_C

. . . . . . . . . . . . . . . . . . . . . . . . . .

Notes

a.

Device mounted with all leads soldered or welded to PC board.

b.

Derate 20 mW/

_C above TA = 25_C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation

of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

Input Voltage, VIN

2 V to 6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input Voltage, VSD

0 V to VIN

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Current

0 to 300 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CIN, COUTa (Ceramic)

2.2

mF

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CEB (Ceramic)

0.01

mF

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Ambient Temperature, TA

-40

_C to 85_C

. . . . . . . . . . . . . . . . . . . .

Operating Junction Temperature, TJ

-40

_C to 125_C

. . . . . . . . . . . . . . . . . . .

Notes

a.

Maximum ESR of COUT: 0.2 W.

SPECIFICATIONS

Test Conditions Unless Specified

TA = 25_C, VIN = VOUT(nom) + 1 V

Limits

- 40 to 85

_C

Parameter

Symbol

IOUT = 1 mA, CIN = 2 mF, COUT = 2.0 mF

VSD = 1.5 V

Tempa

Minb

Typc

Maxb

Unit

Start-Up BP Current

IOUT

ON/OFF = High

Room

1

mA

Input Voltage Range

VIN

Full

2

6

V

w

Room

- 2.0

1

2.0

v

VOUT w 1.8 V

Full

- 3.0

1

3.0

Output Voltage Accuracy

1 mA

v IOUT v 300 mA

Room

- 2.5

1

2.5

%

VOUT = 1.2 V

Full

- 3.5

1

3.5

Line Regulation (VOUT v 3 V)

Full

- 0.06

0.18

Line Regulation

(3.0 V < VOUT v3.6 V)

DV

OUT

100

DV

IN

V

OUT(nom)

From VIN = VOUT(nom) + 1 V to VOUT(nom) + 2 V

Full

0

0.3

%/V

Line Regulation (5-V Version)

IN

OUT(nom)

From VIN = 5.5 V to 6 V

Full

0

0.4

IOUT = 1 mA

Room

1

Room

45

80

Dropout Voltaged, g

(V

w 2.6 V)

IOUT = 50 mA

Full

50

90

(VOUT(nom) w 2.6 V)

Room

300

350

VIN - VOUT

IOUT = 300 mA

Full

415

mV

IN

OUT

Room

65

100

Dropout Voltaged, g

t

w

IOUT = 50 mA

Full

120

(VOUT(nom) t 2.6 V, VIN w

2 V)

Room

400

520

2 V)

IOUT = 300 mA

Full

570

Room

100

150

Ground Pin Currente, g

IOUT = 0 mA

Full

180

Ground Pin Currente, g

(VOUT(nom) v 3 V)

Room

130

200

IOUT = 300 mA

Full

330

m

IGND

Room

110

170

mA

Ground Pin Currente

IOUT = 0 mA

Full

200

Ground Pin Currente

(VOUT(nom) u 3 V)

Room

150

225

IOUT = 300 mA

Full

275

Peak Output current

IO(peak)

VOUT w 0.95 x VOUT(nom). tPW = 2 ms

Full

400

mA

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