TPS57114QRTERQ1 datasheet(5/38 Pages) TI1

Part #	TPS57114QRTERQ1

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

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Manufacturer	TI1 [Texas Instruments]

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5 / 38 page

TPS57114-Q1

www.ti.com

SLVSAH5B – DECEMBER 2010 – REVISED APRIL 2012

ELECTRICAL CHARACTERISTICS (continued)

TJ = –40°C to 150°C, VIN = 2.95 to 6 V (unless otherwise noted)

DESCRIPTION

CONDITIONS

MIN

TYP

MAX

UNIT

PH (PH PIN)

Minimum On time

Measured at 50% points on PH, IOUT = 4 A

75

ns

Measured at 50% points on PH, VIN = 6 V,

120

IOUT = 0 A

Minimum Off time

Prior to skipping off pulses, BOOT-PH = 2.95 V,

60

ns

IOUT = 4 A

Rise Time

2.25

VIN = 6 V, 4 A

V/ns

Fall Time

2

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

60

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)

POWER GOOD (PWRGD PIN)

VSENSE falling (Fault)

91

% Vref

VSENSE rising (Good)

93

% Vref

VSENSE threshold

VSENSE rising (Fault)

109

% Vref

VSENSE falling (Good)

107

% Vref

Hysteresis

VSENSE falling

2

% Vref

Output high leakage

VSENSE = VREF, V(PWRGD) = 5.5 V

7

nA

On resistance

56

100

Ω

Output low

I(PWRGD) = 3 mA

0.3

V

Minimum VIN for valid output

V(PWRGD) < 0.5 V at 100 μA

0.650

1.5

V

5

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