LM5642, LM5642X

SNVS219K – JUNE 2003 – REVISED APRIL 2013

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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

ABSOLUTE MAXIMUM RATINGS

(1) (2)

Voltages from the indicated pins to SGND/PGND:

VIN, ILIM1, ILIM2, KS1, KS2

−0.3V to 38V

SW1, SW2, RSNS1, RSNS2

FB1, FB2, VDD1, VDD2

−0.3V to 6V

SYNC, COMP1, COMP2, UV Delay

−0.3V to (VLIN5 +0.3)V

−0.3V to (VLIN5 +0.6)V

CBOOT1, CBOOT2

43V

CBOOT1 to SW1, CBOOT2 to SW2

−0.3V to 7V

LDRV1, LDRV2

−0.3V to (VDD+0.3)V

HDRV1 to SW1, HDRV2 to SW2

−0.3V

HDRV1 to CBOOT1, HDRV2 to CBOOT2

+0.3V

(4)

TSSOP

1.1W

HTSSOP

3.4W

Ambient Storage Temp. Range

−65°C to +150°C

Wave

4 sec, 260°C

Infrared

10sec, 240°C

Vapor Phase

75sec, 219°C

2kV

(1)

Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Range indicates conditions for

which the device is intended to be functional, but does not ensure specific performance limits. For ensured specifications and test

conditions, see the Electrical Characteristics. The ensured specifications apply only for the test conditions. Some performance

characteristics may degrade when the device is not operated under the listed test conditions.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and

specifications.

(3)

ON/SS1 and ON/SS2 are internally pulled up to one diode drop above VLIN5. Do not apply an external pull-up voltage to these pins. It

may cause damage to the IC.

(4)

worst-case condition of no heat sinking of the 28-pin TSSOP. The HTSSOP package has a

thermal ratings results from the IC being mounted on a 4 layer JEDEC standard board using the same temperature conditions as the

TSSOP package above. A thermal shutdown will occur if the temperature exceeds the maximum junction temperature of the device.

(5)

See http://www.ti.com for other methods of soldering plastic small-outline packages.

(6)

For testing purposes, ESD was applied using the human-body model, a 100pF capacitor discharged through a 1.5 k

Ω resistor.

OPERATING RATINGS

(1)

VIN (VLIN5 tied to VIN)

4.5V to 5.5V

VIN (VIN and VLIN5 separate)

5.5V to 36V

Junction Temperature

−40°C to +125°C

(1)

Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Range indicates conditions for

which the device is intended to be functional, but does not ensure specific performance limits. For ensured specifications and test

conditions, see the Electrical Characteristics. The ensured specifications apply only for the test conditions. Some performance

characteristics may degrade when the device is not operated under the listed test conditions.

4

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