LM5177DCPR datasheet(8/60 Pages) TI2

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5.5 Electrical Characteristics

Typical values correspond to TJ=25°C. Minimum and maximum limits apply over TJ=-40°C to 125℃. Unless otherwise stated,

V(BIAS) =12 V

PARAMETER

MIN

TYP

MAX UNIT

SUPPLY CURRENT

Shutdown current into VIN

V(VIN) = 12 V, V(BIAS) = 0

V V(EN) = 0 V

TJ = 25°C

2.8

µA

TJ = –40°C to 125°C

2.8

µA

Shutdown current into BIAS

V(VIN) = 0 V, V(EN) = 0 V

TJ = 25°C

2.8

µA

TJ = –40°C to 125°C

2.8

µA

Quiescent current into BIAS

V(EN) = 3.3 V, V(FB) > 1 V,

TJ = 25°C

µA

TJ = –40°C to 125°C

µA

IIL

Low-level input current (EN/UVLO)

V(EN/UVLO) ≤ 0.55 V

±0.01

±0.1

µA

VCC REGULATOR

VCC regulation

VBIAS 12.0 V ,I(VCC) = 20 mA

4.75

5.25

VVIN 12.0 V ,I(VCC) = 20 mA

4.75

5.25

VCC line regulation

I(VCC) = 1 mA

V(VIN) =3.5V V(BIAS) = 6.7

V to 42 V

±1

V(BIAS) =0 V V(VIN) = 6.7

V to 78 V

±1

BIAS LDO dropout load regulation

V(BIAS)= 6.7V, V(VIN) = 3.5

I(VCC) = 1 mA to 200 mA

120 mV

VBIAS = 3.5V, V(VIN) = 2.8 V, I(VCC) = 35 mA

200 mV

VIN LDO dropout load regulation

V(BIAS)= 0V, V(VIN) = 6.7V, I(VCC) = 1 mA to 175 mA

120 mV

V(BIAS)= 0V, V(VIN) = 3.5V, I(VCC) = 15 mA

200 mV

VCC UVLO delay

VCC rising

VCC sourcing current limit

VCC ≥ 4.5 V

V(BIAS)= 0V, V(VIN) = 12 V,

200

V(VIN) = 3.5 V,

200

VT+(VCC)

Positive going threshold

V(VCC) rising

3.4

3.45

3.5

VT-(VCC)

Negative going threshold

V(VCC) falling

3.2

3.25

3.3

VT+

(VCC,SUP)

Positive going threshold for LDO

switch-over

6.35

6.5

6.7

Vhyst(VCC,SU

LDO switch-over hysteresis

ENABLE

VT+(EN)

Enable positive-going threshold

EN rising

0.47

0.63

0.8

VT-(EN)

Enable negative-going threshold

EN falling

0.45

0.6

0.75

Vhyst(EN)

Enable threshold hysteresis

EN falling

100 mV

td(EN)

Shutdown delay time

UVLO

VDET positive-going threshold

V(VIN) rising

3.3

3.4

3.55

VDET negative-going threshold

V(VIN) falling

2.6

2.7

2.85

VT+(UVLO)

UVLO positive-going threshold

V(EN/UVLO) rising

1.22

1.25

1.28

VT-(UVLO)

UVLO negative-going threshold

V(EN/UVLO) falling

1.17

1.2

1.23

IUVLO

UVLO hysteresis sinking current

0.7 V ≤ V(EN/UVLO) < 1.22 V

µA

Enable time to start

switching

VCC = 5V, VT+(UVLO) > 1.3V

td(UVLO)

UVLO and VDET detection delay time V(EN/UVLO) falling; V(VDET) falling

25.5

34.5

µs

SYNC

LM5177

SNVSBU4F – JUNE 2022 – REVISED JANUARY 2025

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