POWER PAD

TPS54339

DDA

HSOP8

SW

VBST

SS

VFB

GND

8

2

3

4

1

EN

VREG5

7

6

5

VIN

TPS54339

SLVSBT2 – JANUARY 2013

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SOFT START

SS charge current

4.2

6.0

7.8

μA

SS discharge current

0.8

1.5

mA

HICCUP AND OVERVOLTAGE PROTECTION

Output OVP threshold

OVP Detect (L>H)

125%

Output Hiccup threshold

Hiccup detect (H>L)

65%

Output Hiccup delay

to Hiccup state

6

µs

Output Hiccup Enable delay

Relative to soft-start time

x1.7

UVLO

3.45

3.75

4.05

UVLO

UVLO threshold

V

0.17

0.33

0.47

DEVICE INFORMATION

DDA PACKAGE

(TOP VIEW)

PIN FUNCTIONS

PIN

DESCRIPTION

NAME

NO.

Supply input for the high-side FET gate drive circuit. Connect 0.1µF capacitor between VBST and SW pins.

VBST

1

An internal diode is connected between VREG5 and VBST.

VIN

2

Input voltage supply pin.

SW

3

Switch node connection between high-side NFET and low-side NFET.

Ground pin. Power ground return for switching circuit. Connect sensitive SS and VFB returns to GND at a

GND

4

single point.

VFB

5

Converter feedback input. Connect to output voltage with feedback resistor divider.

4

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