6.5 Electrical Characteristics (continued)

TJ = –40°C to +125°C, VVCC = 3 V (internal), VVIN = 4 V to 16 V. Typical values are at TJ = 25°C and VVIN = 12 V (unless

otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VUVP

Undervoltage-protection (UVP) threshold

voltage

VFB falling

77%

80%

83%

tUVPDLY

UVP filter delay

70

µs

Hiccup wait time

TPS54KB21 and TPS54KB23

7 x tSS

ms

POWER GOOD

VPGTH(RISE_OV)

Power Good threshold

FB rising, PG high to low

113%

116%

119%

VPGTH(RISE_UV)

Power Good threshold

FB rising, PG low to high

89%

92.5%

95%

VPGTH(FALL_UV)

Power Good threshold

FB falling, PG high to low

77%

80%

83%

PG delay going from low to high during

startup

1.1

1.5

ms

PG delay going from high to low

4

6.2

µs

IPG(LKG)

PG pin leakage current when open drain

output is high

VPG = 4.5 V

5

µA

PG pin output low-level voltage

IPG = 7 mA

500

mV

PG pin output low-level when VIN and VCC

are low

VVIN = 0 V, VVCC = 0 V, VEN = 0 V, PG pulled

up to 3.3 V through a 100-kΩ resistor

850

mV

PG pin output low-level when VIN and VCC

are low

VVIN = 0 V, VVCC = 0 V, VEN = 0 V, PG pulled

up to 3.3 V through a 10-kΩ resistor

1000

mV

THERMAL SHUTDOWN

TJ(SD)

Thermal shutdown threshold

Temperature rising

150

165

°C

TJ(HYS)

Thermal shutdown hysteresis

15

°C

OUTPUT DISCHARGE

Output discharge resistor on SW pin

VIN = 12 V, VSW = 1 V, power conversion

disabled

50

Ω

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TPS54KB20

SLVSGP3 – MAY 2023

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