TPS54310

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SLVS412E – DECEMBER 2001 – REVISED DECEMBER 2014

7.5 Dissipation Ratings

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

(1) (2)

PACKAGE

POWER RATING

POWER RATING

POWER RATING

20-Pin PWP with solder

2.12 W

1.54 W

20-Pin PWP without solder

1.73 W

0.96 W

0.69 W

(1)

For more information on the PWP package, refer to TI technical brief, literature number SLMA002.

(2)

Test board conditions:

(a) 3 inch × 3 inch, 2 layers, Thickness: 0.062 inch

(b) 1.5 oz copper traces located on the top of the PCB

(c) 1.5 oz copper ground plane on the bottom of the PCB

(d) Ten thermal vias (see recommended land pattern in application section of this data sheet)

(3)

Maximum power dissipation may be limited by overcurrent protection.

7.6 Electrical Characteristics

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY VOLTAGE, VIN

VIN input voltage range

3

6

V

6.2

9.6

8.4

12.8

Quiescent current

mA

open

Shutdown, SS/ENA = 0 V

1

1.4

UNDER VOLTAGE LOCK OUT

Start threshold voltage, UVLO

2.95

3

V

Stop threshold voltage, UVLO

2.70

2.80

Hysteresis voltage, UVLO

0.14

0.16

V

2.5

µs

BIAS VOLTAGE

Output voltage, VBIAS

2.70

2.80

2.90

V

100

µA

CUMULATIVE REFERENCE

Accuracy

0.882

0.891

0.900

V

REGULATION

0.07

%/V

0.07

0.03

%/A

0.03

OSCILLATOR

SYNC

≤ 0.8 V, RT open

280

350

420

Internally set free-running frequency range

kHz

SYNC

≥ 2.5 V, RT open

440

550

660

RT = 180 k

252

280

308

Externally set free-running frequency range

RT = 100 k

Ω (1% resistor to AGND)

460

500

540

kHz

RT = 68 k

663

700

762

High-level threshold voltage, SYNC

2.5

V

Low-level threshold voltage, SYNC

0.8

V

50

330

700

kHz

0.75

V

(1)

Specified by the circuit used in Figure 10.

(2)

Static resistive loads only

(3)

Specified by design

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