TPS54335

TPS54336

1

2

3

4

5

6

7

8

BOOT

VIN

PH

GND

RT

EN

COMP

VSENSE

PowerPAD

(9)

1

2

3

4

5

6

7

8

BOOT

VIN

PH

GND

SS

EN

COMP

VSENSE

PowerPAD

(9)

TPS54335

TPS54336

SLVSC03B – MAY 2013 – REVISED NOVEMBER 2013

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

The Electrical Ratings specified in this section will apply to all specifications in this document unless otherwise noted. These

specifications will be interpreted as conditions that will not degrade the device’s parametric or functional specifications for the

PARAMETERS

CONDITIONS

MIN

TYP

MAX

UNIT

THERMAL SHUTDOWN

Thermal shutdown

160

175

°C

Thermal shutdown hysterisis

10

°C

Thermal shutdown hiccup time

32768

Cycles

PH (PH PIN)

Minimum on time

94

145

ns

Minimum off time

BOOT-PH

≥ 3V

0

%

BOOT (BOOT PIN)

BOOT-PH UVLO

2.1

3

V

SWITCHING FREQUENCY

TPS54335

50

1500

kHz

TPS54335, Rrt = 100 k

Ω

384

480

576

kHz

Switching frequency range

TPS54335, Rrt = 1000 k

Ω, –40°C~105°C

40

50

60

kHz

TPS54335, Rrt = 30 k

Ω

1200

1500

1800

kHz

Internal switching frequency

TPS54336

272

340

408

kHz

SLOW START

Internal slow start time

TPS54335

2

ms

Slow start charge current

TPS54336

2.3

µA

PIN ASSIGNMENTS

8-PIN SOIC WITH THERMAL PAD

(TOP VIEW)

PIN FUNCTIONS

PIN

DESCRIPTION

NAME

NUMBER

A bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor is below the

BOOT

1

minimum required by the output device, the output is forced to switch off until the capacitor is

refreshed.

Vin

2

Input supply voltage, 4.5 V to 28 V.

PH

3

The source of the internal high side power MOSFET.

GND

4

Ground.

VSENSE

5

Inverting node of the gm error amplifier.

Error amplifier output, and input to the output switch current comparator. Connect frequency

COMP

6

compensation components to this pin.

EN

7

Enable pin. Float to enable.

4

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