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Document Number: 73579

S09-1454-Rev. B, 03-Aug-09

Vishay Siliconix

SiP12503

Notes:

a. Derate 20 mW/°C above 70 °C.

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

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.

ABSOLUTE MAXIMUM RATINGS (all voltages referenced to GND = 0 V)

Parameter

Limit

Unit

- 0.3 to 6

V

LX Voltage

- 0.3 to 6

XSHD Voltage

FB Voltage

- 0.3 to 6

Maximum Junction Temperature

150

°C

Storage Temperature

- 55 to 150

Operating Junction Temperature

125

a

1100

mW

PowerPAK MLP33-6

50

°C/W

RECOMMENDED OPERATING RANGE (all voltages referenced to GND = 0 V)

Parameter

Limit

Unit

0.85 to 5.0

V

2.0 to 5

XSHD Voltage

LX Voltage

FB Voltage

Operating Temperature Range

- 40 to 85

°C

SPECIFICATIONS

Parameter

Symbol

Test Conditions Unless Specified

Limits

Unit

Minimum Start-Up Voltage

Full

0.65

0.85

V

0.55

UVLO

Full

1.8

2

UVLO Hysteresis

Full

0.100

FB Voltage Accuracy

- 1.5

+ 1.5

%

- 25 to

85 °C

- 3.0

+ 3.0

Full

- 3.5

+ 3.5

Feedback Input Current

1nA

Maximum PWM Duty Cycle

MAXDTY

Full

80

87

%

PWM Switching Frequency

Full

225

300

375

kHz