TPS54618-Q1 datasheet(5/42 Pages) TI1

No de pièce	TPS54618-Q1

Description	2.95-V to 6-V Input, 6-A Output, 2-MHz, Synchronous Step-Down SWIFT Switcher

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Fabricant	TI1 [Texas Instruments]

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TPS54618-Q1

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SLVSBY9D – AUGUST 2013 – REVISED JANUARY 2016

6.5 Electrical Characteristics

at TJ = –40°C to 125°C, VIN = 2.95 to 6 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY VOLTAGE (VIN PIN)

Operating input voltage

2.95

6

V

VIN UVLO STOP

2.28

2.5

Internal undervoltage lockout threshold

V

VIN UVLO START

2.45

2.6

Shutdown supply current

EN = 0 V, 25°C, 2.95 V

≤ VIN ≤ 6 V

5.5

15

μA

Quiescent current, Iq

VSENSE = 0.9 V, VIN = 5 V, 25°C, RT = 400 k

Ω

515

650

μA

ENABLE AND UVLO (EN PIN)

Rising

1.25

Enable threshold

V

Falling

1.18

Enable threshold + 50 mV

–3.5

Input current

μA

Enable threshold – 50 mV

–1.9

VOLTAGE REFERENCE (VSENSE PIN)

Voltage reference

2.95 V

≤ VIN ≤ 6 V, –40°C <TJ < 150°C

0.791

0.799

0.807

V

MOSFET

BOOT-PH = 5 V

12

25

High-side switch resistance

m

Ω

BOOT-PH = 2.95 V

16

33

VIN = 5 V

13

25

Low-side switch resistance

m

Ω

VIN = 2.95 V

17

33

ERROR AMPLIFIER

Input current

2

nA

Error amplifier transconductance (gm)

–2

μA < I(COMP) < 2 μA, V(COMP) = 1 V

245

μmhos

Error amplifier transconductance (gm)

–2

μA < I(COMP) < 2 μA, V(COMP) = 1 V,

79

μmhos

during slow-start

Vsense = 0.4 V

Error amplifier source/sink

V(COMP) = 1 V, 100-mV overdrive

±20

μA

COMP to Iswitch gm

25

A/V

CURRENT LIMIT

VIN = 6 V, 25°C < TJ < 150°C

7.46

10.6

15.3

Current limit threshold

A

VIN = 2.95 V, 25°C < TJ < 150°C

7.68

10.2

13.5

THERMAL SHUTDOWN

Thermal shutdown

168

°C

Hysteresis

20

°C

BOOT (BOOT PIN)

BOOT charge resistance

VIN = 5 V

16

Ω

BOOT-PH UVLO

VIN = 2.95 V

2.1

V

SLOW-START AND TRACKING (SS/TR PIN)

Charge current

V(SS/TR) = 0.4 V

2

μA

SS/TR to VSENSE matching

V(SS/TR) = 0.4 V

54

mV

SS/TR to reference crossover

98% normal

1.1

V

SS/TR discharge voltage (Overload)

VSENSE = 0 V

61

mV

SS/TR discharge current (Overload)

VSENSE = 0 V, V(SS/TR) = 0.4 V

350

µA

SS discharge current (UVLO, EN, Thermal

VIN = 5 V, V(SS) = 0.5 V

1.9

mA

fault)

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