LM2633

SNVS139C – MAY 2004 – REVISED APRIL 2005

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Absolute Maximum Ratings

(1)

Voltages from the indicated pins to GND/PGND:

VIN, KS1, KS2, SW1, SW2

−0.3V to 31V

ILIM1, ILIM2

−0.3V to 31V

VID0-VID4

−0.3V to 5V

VLIN, VDD1, VDD2, PGOOD

−0.3V to 6V

FB1, FB2, SENSE2, G3, FB3, OUT3

−0.3V to 6V

CBOOT1

−0.3V to SW1+ 7V

CBOOT2

−0.3V to SW2+ 7V

ON/SS1, ON/SS2

−0.3V to 5V

FPWM

−0.3V to 7V

(2)

1.56W

Junction Temperature

+150°C

2kV

Ambient Storage Temperature Range

−65°C to +150°C

Wave

4 sec, 260°C

Infrared

10sec, 240°C

Vapor Phase

75sec, 219°C

(1)

Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is guaranteed. For guaranteed performance limits and associated test conditions, see the Electrical

Characteristics table.

(2)

condition of no heat sinking of the 48-pin TSSOP. Heat sinking allows the safe dissipation of more power. The Absolute Maximum

power dissipation should be derated by 12.5mW per °C above 25°C ambient. The LM2633 actively limits its junction temperature to

about 150°C.

(3)

Except for ILIM1 and ILIM2 pins, which are 1.5kV. For testing purposes, ESD was applied using the human-body model, a 100pF

capacitor discharged through a 1.5k

Ω resistor.

(4)

For detailed information on soldering plastic small-outline packages, refer to the Packaging Databook available from National

Semiconductor Corporation.

Operating Ratings

(1)

VIN (VIN and VLIN5 tied together)

4.5V to 5.5V

VIN (VIN and VLIN5 separate)

5.0V to 30V

Junction Temperature 1

0°C to +125°C

Junction Temperature 2

−40°C to +125°C

VDD1, VDD2

4.5V to 5.5V

(1)

Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is guaranteed. For guaranteed performance limits and associated test conditions, see the Electrical

Characteristics table.

8

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