TPS54418_15 datasheet(6/40 Pages) TI

No. de pieza	TPS54418

Descripción Electrónicos	TPS54418 2.95-V to 6-V Input, 4-A Output, 2-MHz , Synchronous Step-Down Switcher With Integrated FETs (SWIFT??

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Fabricante Electrónico	TI [Texas Instruments]

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TPS54418

SLVS946D – SEPTEMBER 2009 – REVISED DECEMBER 2014

www.ti.com

Electrical Characteristics (continued)

–40°C

≤ TJ ≤ 150°C, 2.95 ≤ VVIN ≤ 6 V (unless otherwise noted) over operating free-air temperature range

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

HIGH-SIDE POWER MOSFET (PH)

Measured at 50% points on PH, IOUT = 4

60

tON(min)

Minimum on time

ns

Measured at 50% points on PH, VVIN = 5 V,

110

IOUT = 0 A

Prior to skipping off pulses,

tOFF(min)

Minimum off time

60

ns

(VBOOT – VPH) = 2.95 V, IOUT = 4

tRISE

Rise time

VVIN = 5 V

1.5

V/ns

tFALL

Fall time

VVIN = 5 V

1.5

V/ns

BOOT (BOOT)

RBOOT

BOOT charge resistance

VVIN = 5 V

16

Ω

VUVLO(Boot)

BOOT-PH UVLO

VVIN = 2.95 V

2.1

V

SOFT-START (SS )

ICHG

Charge current

VSS = 0.4 V

1.8

μA

VSSxREF

SS to reference crossover

98% nominal

0.9

V

VDSCHG(SS)

SS discharge voltage (overload)

VVSENSE = 0 V

20

μA

SS discharge current (UVLO,

IDSCHG(SS)

VVIN = 5 V, VSS = 0.5 V

1.25

mA

EN, thermal fault)

POWER GOOD (PWRGD)

VVSENSE falling (fault)

91%

VVSENSE rising (good)

93%

VTH(PG)

VSENSE threshold

VVSENSE rising (fault)

107%

VREF

VVSENSE falling (Good)

105%

VHYST(PG)

Hysteresis

VVSENSE falling

2%

IPH(lkg)

Output high leakage

VVSENSE = VREF, VPWRGD = 5.5 V

2

nA

RPG

Power Good on-resistance

100

Ω

VOL

Low-level output voltage

IPWRGD = 3.5 mA

0.3

V

Minimum input voltage for valid

VMIN(PG)

VPWRGD < 0.5 V , IOUT = 100 μA

1.2

1.6

V

output

6

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