SI9169BQ-T1 datasheet(2/8 Pages) VISHAY

Part #	SI9169BQ-T1

Description	High Frequency 1-A Synchronous Buck/Boost Converter

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Manufacturer	VISHAY [Vishay Siliconix]

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2 / 8 page

Si9169

Vishay Siliconix

www.vishay.com

2

Document Number: 70945

S-40695—Rev. D, 19-Apr-04

ABSOLUTE MAXIMUM RATINGS

Voltages Referenced to GND

VDD

6.5 V

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

MODE, PWM/PSM, SYNC, SD,

VREF, ROSC COMP, FB

−0.3 V to VDD +0.3 V

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

VO

−0.3 V to VS +0.3 V

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

PGND

"0.3 V

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

Voltages Referenced to PGND

VS, VIN/OUT

6.5 V

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

COIL

−0.4 V to VIN/OUT +0.4 V

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

Peak Output Current

3 A for 1 ms

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

Continuous Output Current

1.4 A

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

Storage Temperature Range

−65 to 150_C

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

Operating Junction Temperature

150_C

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

Power Dissipation (Package)a

20-Pin TSSOP (Q Suffix)b

1.0 W

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

Thermal Impedance (ΘJA)

20-Pin TSSOPc

90_C/W

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

Operating Temperature Range

Si9169BQ

−25 to 85_C

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

Si9169DQ

−40 to 85_C

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

Notes

a.

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

b.

Derate 11 mW/

_C above 60_C.

c.

With Pin 1 connected to GND plane.

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 CONDITIONS

Voltages Referenced to GND

VDD

2.7 V to 6 V

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

MODE, PWM/PSM, SYNC, SD

0 V to VDD

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

Voltages Referenced to PGND

VS, VIN/OUT

2.7 V to 6 V

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

Fosc

200 kHz to 2 MHz

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

Rosc

25 kW to 300 kW

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

VREF Capacitor

0.1 mF

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

SPECIFICATIONS

Test Conditions

Unless Otherwise Specified

Limitse

Parameter

Symbol

Unless Otherwise Specified

2.7 V < VDD < 6V,

VIN/OUT = 3.3 V, VS = 3.3 V

Mina

Typb

Maxa

Unit

Reference

Output Voltage

VREF

IREF = 0

1.265

1.3

1.330

V

Output Voltage

VREF

TA = 25°C, IREF = 0

1.280

1.3

1.320

V

Load Regulation

DVREF

VDD = 3.3 V, −500 µA < IREF <0

3

mV

Power Supply Rejection

PSRR

60

dB

UVLO

Under Voltage Lockout (turn-on)

VUVLOLH

2.3

2.4

2.5

V

Hysteresis

VHYS

VUVLOLH − VUVLOHL

0.1

V

Soft-Start Time

SS time

tss

6

ms

MODE

Logic High

VIH

0.7 VDD

V

Logic Low

VIL

0.3 VDD

V

Input Current

IL

−1.0

1.0

mA

SD, SYNC, PWM/PSM

Logic High

VIH

2.4

V

Logic Low

VIL

0.8

V

Input Current

IL

−1.0

1.0

mA

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