LM5175PWPR datasheet(7/38 Pages) TI1

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LM5175

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SNVSA37A – OCTOBER 2015 – REVISED MAY 2016

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Electrical Characteristics (continued)

Typical values correspond to TJ = 25°C. Minimum and maximum limits apply over the –40°C to 125°C junction temperature

range unless otherwise stated. VIN = 24 V unless otherwise stated.

(1)

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

DITHER

IDITHER

Dither source/sink current

10.5

µA

VDITHER

Dither high threshold

1.27

Dither low threshold

1.16

SYNC

VSYNC

Sync input high threshold

2.1

Sync input low threshold

1.2

PWSYNC

Sync input pulse width

500

CURRENT LIMIT

VCS(BUCK)

Buck current limit threshold (Valley)

VIN = VVISNS = 24 V, VVOSNS = 12 V,

VSLOPE = 0 V, TJ = 25°C

53.2

VCS(BOOST)

Boost current limit threshold (Peak)

VIN = VVISNS = 12 V, VVOSNS = 18 V,

VSLOPE = 0 V, TJ = 25°C

119

170

221

IBIAS(CS/CSG)

CS/CSG pin bias current

VCS = VCSG = 0 V

-75

µA

IOFFSET(CS/CS

CSG pin bias current

VCS = VCSG = 0 V

CONSTANT CURRENT LOOP

VSNS

Average current loop regulation target

VISNS(-) = 24 V, sweep ISNS(+), VSS =

0.8 V

ISNS

ISNS(+)/ISNS(–) pin bias currents

VISNS(+) = VISNS(–) = VIN = 24 V

µA

gm of soft-start pull down amplifier

VISNS(+)–VISNS(–) = 55 mV, VSS = 0.5

SLOPE

ISLOPE

Buck adaptive slope current

VIN = VVINSNS = 24 V, VVOSNS = 12 V,

VSLOPE = 0 V

µA

Boost adaptive slope current

VIN = VVINSNS = 12 V, VVOSNS = 18 V,

VSLOPE = 0 V

gmSLOPE

Slope compensation amplifier gm

µS

MODE

IMODE

Source current out of MODE pin

µA

VDCM_HIC

DCM with hiccup threshold

0.60

0.7

0.76

VCCM_HIC

CCM with hiccup threshold

1.18

1.28

1.38

VCCM

CCM no hiccup threshold

2.22

2.4

2.6

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