LM5035

SNVS428H – JANUARY 2006 – REVISED OCTOBER 2015

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Electrical Characteristics (continued)

VVIN = 48 V, VVCC = 10 V externally applied, RRT = 15.0 kΩ, RDLY = 27.4 kΩ, VUVLO = 3 V, VOVP = 0 V unless otherwise

stated

(1)(2).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

UVLO AND SHUTDOWN (UVLO PIN)

TJ = 25°C

1.25

VUVLO

Undervoltage threshold

V

TJ = –40°C to 125°C

1.212

1.288

TJ = 25°C

23

IUVLO

Hysteresis current

UVLO pin sinking

µA

TJ = –40°C to 125°C

19

27

Undervoltage shutdown

UVLO voltage falling, TJ = 25°C

0.3

V

threshold

Undervoltage standby

UVLO voltage rising, TJ = 25°C

0.4

V

enable threshold

OVERVOLTAGE PROTECTION (OVP PIN)

TJ = 25°C

1.25

VOVP

Overvoltage threshold

V

TJ = –40°C to 125°C

1.212

1.288

TJ = 25°C

23

IOVP

Hysteresis current

OVP pin sourcing

µA

TJ = –40°C to 125°C

19

27

CURRENT SENSE INPUT (CS PIN)

TJ = 25°C

0.25

VCS

Current limit threshold

V

TJ = –40°C to 125°C

0.228

0.272

TJ = 25°C, CS from zero to 1 V, Time for HO and LO to

CS delay to output

80

ns

fall to 90% of VCC Output load = 0 pF

Leading edge blanking time

TJ = 25°C

50

ns

at CS

TJ = 25°C

32

CS sink impedance

Internal FET sink

Ω

(clocked)

impedance

TJ = –40°C to 125°C

60

CURRENT LIMIT RESTART (RES PIN)

TJ = 25°C

2.5

VRES

RES threshold

V

TJ = –40°C to 125°C

2.4

2.6

TJ = 25°C

22

Charge source current

VRES = 1.5 V

µA

TJ = –40°C to 125°C

16

28

TJ = 25°C

12

Discharge sink current

VRES = 1 V

µA

TJ = –40°C to 125°C

8

16

SOFT-START (SS PIN)

TJ = 25°C

55

Charging current in normal

ISS

VSS = 0

µA

operation

TJ = –40°C to 125°C

40

70

TJ = 25°C

1.2

Charging current during a

VSS = 0

µA

hiccup mode restart

TJ = –40°C to 125°C

0.6

1.8

TJ = 25°C

55

Soft-stop current sink

VSS = 2.5 V

µA

TJ = –40°C to 125°C

40

70

OSCILLATOR (RT PIN)

TJ = 25°C

185

200

215

Frequency 1 (at HO, half

FSW1

RRT = 15 kΩ,

kHz

oscillator frequency)

TJ = –40°C to 125°C

180

220

TJ = 25°C

500

Frequency 2 (at HO, half

FSW2

RRT = 5.49 kΩ

kHz

oscillator frequency)

TJ = –40°C to 125°C

430

570

DC level

TJ = 25°C

2

V

TJ = 25°C

3

Input Sync threshold

V

TJ = –40°C to 125°C

2.5

3.4

6

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