TPS54240DRCT datasheet(6/56 Pages) TI1

No de pièce	TPS54240DRCT

Description	3.5-V to 42-V Step-Down DC - DC Converter With Eco-Mode

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Fabricant	TI1 [Texas Instruments]

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TPS54240

SLVSAA6B – APRIL 2010 – REVISED NOVEMBER 2014

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6.5 Electrical Characteristics

TJ = –40°C to 150°C, VIN = 3.5 to 42 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY VOLTAGE (VIN PIN)

Operating input voltage

3.5

42

V

Internal undervoltage lockout threshold

No voltage hysteresis, rising and falling

2.5

V

Shutdown supply current

EN = 0 V, 25°C, 3.5 V

≤ VIN ≤ 42 V

1.3

4

μA

Operating : nonswitching supply current

VSENSE = 0.83 V, VIN = 12 V, 25°C

138

200

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

TJ = 25°C

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 (EA)

Input current

50

nA

Error amplifier transconductance (gM)

–2

μA < ICOMP < 2 μA, VCOMP = 1 V

310

μS

–2

μA < ICOMP < 2 μA, VCOMP = 1 V,

Error amplifier transconductance (gM)

70

μS

during slow start

VVSENSE = 0.4 V

Error amplifier dc gain

VVSENSE = 0.8 V

10,000

V/V

Error amplifier bandwidth

2700

kHz

Error amplifier source/sink

V(COMP) = 1 V, 100 mV overdrive

±27

μA

COMP to switch current

10.5

A/V

transconductance

6

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