SI9150DY datasheet(2/5 Pages) VISHAY

Part #	SI9150DY

Description	Synchronous Buck Converter Controller

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Manufacturer	VISHAY [Vishay Siliconix]

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Si9150

Vishay Siliconix

www.vishay.com

2

Document Number: 70020

S-40752—Rev. F, 19-Apr-04

ABSOLUTE MAXIMUM RATINGS

Voltages Referenced to GND.

VDD

18 V

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

ISENSE Input

−2 V to VDD +2 V

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

All Other Inputs

−0.3 to VDD + 0.3 V

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

P-Gate, N-Gate Continuous Source/Sink Current

50 mA

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

Storage Temperature

−65 to 125_C

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

Operating Junction Temperature

150_C

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

Power Dissipation (Package)a

14-Pin SOIC (Y Suffix)b

900 mW

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

Thermal Impedance (QJA)

14-Pin SOIC

140_C/W

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

Notes

a.

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

b.

Derate 7.2 mW/_C.

SPECIFICATIONSa

Test Conditions

Unless Otherwise Specified

Limits

C Suffix 0 to 70_C

Limits

D Suffix −40 to 85_C

Parameter

Symbol

Unless Otherwise Specified

6.0 v VDD v 16.5 V

Minb

Typc

Maxb

Minb

Typc

Maxb

Unit

Reference

Output Voltage

VREF

TA = 25_C

Measured at Feedbacke Pin 5

2.45

2.50

2.55

2.45

2.50

2.55

V

Output Voltage

VREF

TMIN to TMAXd

2.425

2.500

2.575

2.40

2.500

2.60

V

Oscillator

Maximum Frequency

fMAX

COSC =94.3 pF, ROSC = 28.7 kW

TA = 25_Cf

255

300

345

255

300

345

kHz

Initial Accuracy

fOSC

COSC =212 pF, ROSC = 41.2 kW

TA = 25_Cf

85

100

115

85

100

115

kHz

Oscillator Ramp Amplitude

VOSC

TA = 25_C, 100 kHz

2.05

2.65

2.85

2.05

2.65

2.85

V

Temperature Stabilityd

fTEMP

VDD = 10 V, TMIN to TMAX

−5

"3

+5

−6

"4

+6

%

Error Amplifier

Input BIAS Current

IB

VFB = VREF

25

500

25

750

nA

Open Loop Voltage Gaind

AVOL

60

72

58

72

dB

Offset Voltage

VOS

10

25

10

30

mV

Unity Gain Bandwidthd

BW

1

1.5

1

1.5

MHz

Output Current

IOUT

Source, VCOMP = 2.50 V

−0.30

−0.20

−0.30

−0.15

mA

Output Current

IOUT

Sink, VCOMP = 1.0 V

1

2.5

0.9

2.5

mA

Power Supply Rejection

PSRR

50

70

48

70

dB

Protection

Current Limit

Threshold Voltage

VCL

TA = 25_C, VDD = 10 V

0.43

0.49

0.55

0.43

0.49

0.55

V

Current Limit

Delay to Outputd

td

TA = 25_C

500

1000

500

1000

ns

Undervoltage

Lockout Voltage

VUVLO

Upper Threshold

5.4

5.7

6.0

5.38

5.7

6.01

V

Undervoltage Hysteresis

VHYS

0.10

0.17

0.25

0.10

0.17

0.26

V

Softstart Pull-Up Current

ISS

20

mA

Supply

Supply Current

(Enable Low)

IOFF

60

100

60

100

mA

Supply Current

(Enable High)

ICC

CL = 0 pF, fOSC = 100 kHz

VDD = 10 V

2.2

3.0

2.2

3.0

mA

Supply Current (STBY Low)

ISB

300

500

300

550

mA

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