TPS54061

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SLVSBB7A – MAY 2012 – REVISED MAY 2012

ELECTRICAL CHARACTERISTICS

(1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY VOLTAGE (VIN PIN)

Operating input voltage

VIN

4.7

60

V

Shutdown supply current

EN = 0V

1.4

µA

Iq Operating – Non switching

VSENSE = 0.9V, VIN = 12V

90

110

µA

ENABLE AND UVLO (EN PIN)

Rising

1.23

1.4

V

Enable threshold

Falling

1

1.18

V

Enable threshold +50 mV

–4.7

µA

Input current

Enable threshold –50 mV

–1.2

µA

Hysteresis

–3.5

µA

Enable high to start switching time

450

µs

VIN

VIN start voltage

VIN rising

4.5

V

VOLTAGE REFERENCE

0.792

0.8

0.808

Voltage reference

V

0.784

0.8

0.816

HIGH-SIDE MOSFET

Switch resistance

BOOT-PH = 5.7V

1.5

3.0

Ω

LOW-SIDE MOSFET

Switch resistance

VIN = 12V

0.8

1.5

Ω

ERROR AMPLIFIER

Input Current

VSENSE pin

20

nA

Error amp gm

108

µMhos

EA gm during slow start

27

µMhos

Error amp dc gain

VSENSE = 0.8V

1000

V/V

Min unity gain bandwidth

0.5

MHz

Error amp source/sink

±8

µA

Start Switching Threshold

0.57

V

COMP to Iswitch gm

1.0

A/V

CURRENT LIMIT

High side sourcing current limit

BOOT-PH = 5.7V

250

350

500

mA

threshold

Zero cross detect current

–1.1

mA

THERMAL SHUTDOWN

Thermal shutdown

176

C

RT/CLK

Operating frequency using RT mode

50

1100

kHz

Switching frequency

425

472

520

kHz

Minimum CLK pulsewidth

40

ns

RT/CLK voltage

0.53

V

RT/CLK high threshold

1.8

V

RT/CLK low threshold

0.5

V

RT/CLK falling edge to PH rising

Measure at 500 kHz with RT resistor

130

ns

edge delay

PLL lock in time

Measure at 500 kHz

100

µs

(1)

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 life of the

product containing it.

Copyright © 2012, Texas Instruments Incorporated

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