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DESCRIPTION (CONT.)

DEVICE RATINGS

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED OPERATING CONDITIONS

ELECTROSTATIC DISCHARGE (ESD) PROTECTION

PACKAGE DISSIPATION RATINGS

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TPS40040, TPS40041

SLUS700B – MARCH 2006 – REVISED MARCH 2006

One of three short circuit threshold levels may be selected by the addition of an external resistor from the COMP

pin to circuit ground. During power on, and before the internal soft start commands the output voltage to rise, the

TPS40040/1 enters a calibration cycle, measures the current out of the COMP pin, and selects an internal SCP

threshold voltage. At the end of the 1.6-ms calibration time, the output voltage is allowed to rise for a 4-ms soft

start. During operation, the selected SCP threshold voltage is compared to the upper MOSFET’s voltage drop

during its ON time to determine whether there is an overload condition.

The packaging of the TPS40040/1 is unique in that the PowerPAD™ is used as an electrical ground connection

as well as a thermal connection.

ORDERING INFORMATION

OPERATING FREQUENCY

PACKAGE

TAPE AND REEL QTY.

PART NUMBER

300 kHz

Plastic 8-pin SON (DRB)

250

TPS40040DRBT

300 kHz

Plastic 8-pin SON (DRB)

2500

TPS40040DRBR

600 kHz

Plastic 8-pin SON (DRB)

250

TPS40041DRBT

600 kHz

Plastic 8-pin SON (DRB)

2500

TPS40041DRBR

over operating free-air temperature range (unless otherwise noted, all voltages are with respect to GND.)

PARAMETER

VALUE

UNIT

VDD

6.5

SW

-3 to 10.5

SW

transient (< 50 ns)

-5

BOOT

SW+6.5

V

HDRV

SW to SW+6.5

EN, FB, LDRV

-0.3 to 6.5

COMP

-0.3 to 3

Operating junction temperature

-40 to 150

°C

Storage junction temperature

-55 to 150

over operating free-air temperature range (unless otherwise noted)

PARAMETER

MIN

TYP

MAX

UNIT

Input voltage

2.25

5.5

V

Junction temperature

-40

125

°C

PARAMETER

MIN

TYP

MAX

UNIT

Human body model

2500

V

CDM

1500

V

THERMAL IMPEDANCE

JUNCTION-TO-AMBIENT

48

°C/W

2W

0.8W

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For more information on the DRB package and the test method, refer to TI technical brief, literature number SZZA017.

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