TPS54260-Q1

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SLVSAH8A

– DECEMBER 2010 – REVISED APRIL 2011

THERMAL INFORMATION

TPS54260-Q1

DGQ

UNITS

10 PINS

Junction-to-ambient thermal resistance (standard board)

62.5

57

Junction-to-case (top) thermal resistance

83

Junction-to-board thermal resistance

28

°C/W

Junction-to-top characterization parameter

1.7

Junction-to-board characterization parameter

20.1

Junction-to-case (bottom) thermal resistance

21

(1)

For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

(2)

distortion starts to substantially increase. See power dissipation estimate in application section of this data sheet for more information.

(3)

Test boards conditions:

(a) 3 inches x 3 inches, 2 layers, thickness: 0.062 inch

(b) 2 oz. copper traces located on the top of the PCB

(c) 2 oz. copper ground plane, bottom layer

(d) 6 thermal vias (13mil) located under the device package

ELECTRICAL CHARACTERISTICS

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY VOLTAGE (VIN PIN)

Operating input voltage

3.5

60

V

Internal undervoltage lockout

No voltage hysteresis, rising and falling

2.5

V

threshold

Shutdown supply current

EN = 0 V, 25

°C, 3.5 V ≤ VIN ≤ 60 V

1.3

4

μA

Operating : nonswitching supply

VSENSE = 0.83 V, VIN = 12 V, 25

°C

138

200

current

ENABLE AND UVLO (EN PIN)

Enable threshold voltage

No voltage hysteresis, rising and falling, 25

°C

1.15

1.25

1.36

V

Enable threshold +50 mV

–3.8

Input current

μA

Enable threshold

–50 mV

–0.9

Hysteresis current

–2.9

μA

VOLTAGE REFERENCE

0.792

0.8

0.808

Voltage reference

V

0.784

0.8

0.816

HIGH-SIDE MOSFET

VIN = 3.5 V, BOOT-PH = 3 V

300

On-resistance

m

Ω

VIN = 12 V, BOOT-PH = 6 V

200

410

ERROR AMPLIFIER

Input current

50

nA

310

μMhos

70

μMhos

during slow start

Error amplifier dc gain

10,000

V/V

Error amplifier bandwidth

2700

kHz

Error amplifier source/sink

±27

μA

COMP to switch current

10.5

A/V

transconductance

CURRENT LIMIT

Current limit threshold

3.5

6.1

A

Copyright

© 2010–2011, Texas Instruments Incorporated

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