Si9176

Vishay Siliconix

New Product

www.vishay.com

2

Document Number: 71753

S-21825—Rev. A, 07-Oct-02

ABSOLUTE MAXIMUM RATINGS

Voltages Referenced to AGND = 0 V

6.2 V

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

--0.3to6.2 V

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

GND

--0.3 to +0.3 V

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

ESD Rating

2 kV

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

Storage Temperature

--65 to 125_C

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

Operating Junction Temperature

150_C

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

481 mW

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

10-pin MLP33

915 mW

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

10-Pin MSOP

135_C/W

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

10-Pin MLP33

71_C/W

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

Peak Inductor Current

1.8 A

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

Notes

a.

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

b.

Derate 7.4 mW/_C above 85_C.

c.

Derate 14 mW/_C above 85_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

2.6 V to 5.5 V

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

10 mF Ceramic

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

4.7 mF Ceramic

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

Inductor

2.2 mH

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

Operating Load Current PWM Mode

0 to 600 mA

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

Operating Load Current PSM Mode

0 to 150 mA

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

SPECIFICATIONS

Parameter

Test Conditions Unless Specified

Limits

Symbol

Unit

Under Voltage Lockout (UVLO)

Under Voltage Lockout (turn-on)

2.3

2.5

V

Hysteresis

0.1

V

Shutdown (SD)

Logic HIGH

1.6

V

Logic LOW

0.4

V

t

Settle Within ±2% accuracy SD rising

100

ms

Settle Within ±2% accuracy SD rising

100

ms

Pull Down

mA

Mode Selection Tri-Level Logic (MODE)

MODE Pin HIGH

PWM

V

MODE Pin LOW

Auto

0.4

V

Mode Pin Input Current

MODE = GND

--5

mA

Mode Pin Input Current

5

mA

Oscillator

Frequency

1.6

2

2.4

MHz

Error Amplifier (FB Pin)

FB Voltage Accuracy

1.190

1.215

1.240

V

FB Voltage Accuracy

1.173

1.257

V

Power Supply Rejection

PSRR

60

db

Input Bias Current

--1

0.01

1

mA