Datasheet

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DESCRIPTION (CONT.)
DEVICE RATINGS
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
ELECTROSTATIC DISCHARGE (ESD) PROTECTION
PACKAGE DISSIPATION RATINGS
(1)
TPS40040 , TPS40041
SLUS700D – MARCH 2006 – REVISED DECEMBER 2007
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) 3000 TPS40040DRBR
600 kHz Plastic 8-pin SON (DRB) 250 TPS40041DRBT
600 kHz Plastic 8-pin SON (DRB) 3000 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
V
IN
Input voltage 2.25 5.5 V
T
J
Junction temperature -40 125 C
PARAMETER MIN TYP MAX UNIT
Human body model 2500 V
CDM 1500 V
THERMAL IMPEDANCE
T
A
= 25C POWER RATING T
A
= 85C POWER RATING
JUNCTION-TO-AMBIENT
48C/W 2W 0.8W
(1) For more information on the DRB package and the test method, refer to TI technical brief, literature number SZZA017.
2 Copyright © 2006 – 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS40040 TPS40041