SI91821DH-18-T1-E3 datasheet(2/10 Pages) VISHAY

Part #	SI91821DH-18-T1-E3

Description	Micropower 300-mA CMOS LDO Regulator With Error Flag

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Manufacturer	VISHAY [Vishay Siliconix]

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Si91821

Vishay Siliconix

www.vishay.com

2

Document Number: 71614

S-51147–Rev. E, 20-Jun-05

ABSOLUTE MAXIMUM RATINGS

Input Voltage, VIN

6.5 V

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

SD Input Voltage, VSD

−0.3 V to VIN

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

Output Current, IOUT

Short Circuit Protected

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

Output Voltage, VOUT

−0.3 V to VO(nom) + 0.3 V

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

Maximum Junction Temperature, TJ(max)

150_C

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

Storage Temperature, TSTG

−55_C to 150_C

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

ESD (Human Body Model)

2 kV

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

Power Dissipation (Package)a

8-Pin MSOPb

666 mW

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

Thermal Impedance (QJA)a

8-Pin MSOPb

185_C/W

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

Notes

a.

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

b.

Derate 10 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.

RECOMMENDED OPERATING RANGE

Input Voltage, VIN

2.35 V to 6 V

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

Output Voltage, VOUT

1.5 to 5.0 V

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

SD Input Voltage, VSD

0 V to VIN

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

IOUT

0 to 300 mA

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

Operating Ambient Temperature, TA

−40_C to 85_C

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

Operating Junction Temperature, TJ

−40_C to 125_C

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

CIN = 2.2 mF, COUT = 2.2 mF (ceramic, X5R or X7R type) , CNOISE = 0.033 mF (ceramic)

COUTRange = 1 mF to 10 mF ("10%, x5R or x7R type)

CIN w COUT

SPECIFICATIONS

Test Conditions

Unless Otherwise Specified

V

1 V I

1 A

Limits

−40 to 85_C

Parameter

Symbol

VIN = VOUT(nom) + 1 V, IOUT = 1 mA

CIN = 2.2 mF, COUT = 2.2 mF, VSD = 1.5 V

Tempa

Minb

Typc

Maxb

Unit

Input Voltage

VIN

2.35

6.0

V

Output Voltage

VOUT

Adjustable Version

Full

1.5

5.0

V

Output Voltage Accuracy

VOUT

1 mA v IOUT v 300 mA

Room

−1.5

1.5

%

Output Voltage Accuracy

(to stated output voltage)

VOUT

1 mA v IOUT v 300 mA

Full

−2.5

2.5

%

VOUT(nom)

Feedback Voltage (ADJ Version)

VSET

Room

1.191

1.215

1.239

V

Feedback Voltage (ADJ Version)

VSET

Full

1.179

1.251

V

Line Regulation

(Except 5-V Version)

DV

100

From VIN = VOUT(nom) + 1 V

to VOUT(nom) + 2 V

Full

−0.18

0.18

Line Regulation (5-V Version)

DVOUT 100

V

From VIN = 5.5 V to 6 V

Full

−0.18

0.18

%/V

Line Regulation (ADJ Version)

VIN VOUT(nom)

VOUT = 1.5 V From VIN = 2.5 V to 3.5 V

Full

−0.18

0.18

%/V

Line Regulation (ADJ Version)

VOUT = 5 V From VIN = 5.5 V to 6 V

Full

−0.18

0.18

IOUT = 10 mA

Room

5

20

Dropout Voltaged

VIN − VOUT

IOUT = 200 mA

Full

80

135

mV

pg

IN

OUT

IOUT = 300 mA

Full

120

200

IOUT = 0 mA

Full

150

270

Ground Pin Current

IGND

IOUT = 200 mA

Room

500

mA

GND

IOUT = 300 mA

Room

600

mA

Shutdown Supply Current

IIN(off)

VSD = 0 V

Room

0.1

1

Peak Output Current

IO(peak)

VOUT w 0.95 x VOUT(nom), tpw = 2 ms

Room

500

mA

BW = 10 Hz to 100 kHz

w/o CNOISE

Room

260

Output Noise Voltage

eN

BW = 10 Hz to 100 kHz

IOUT = 150 mA

CNOISE = 0.1 mF

Room

37

mV (rms)

Output Noise Voltage

eN

BW = 10 to 100 kHz

IOUT = 10 mA

CNOISE = 33 nF

Room

54

mV (rms)

f = 1 kHz

Room

60

Ripple Rejection

DVOUT/DVIN

IOUT = 150 mA

f = 10 kHz

Room

50

dB

pp

j

OUT

IN

OUT

f = 100 kHz

Room

40

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