LTC4258 datasheet(3/28 Pages) LINER

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LTC4258

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ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. AGND = DGND = 0V, VDD = 3.3V, VEE = –48V unless otherwise noted

(Note 5).

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ITCLASS

Classification Threshold Current

Class 0-1

●

5.5

6.5

7.5

Class 1-2

●

14.5

Class 2-3

●

Class 3-4

●

Class 4-Overcurrent

●

Gate Driver

IGON

GATE Pin Current

Gate On, VGATEn = VEE

●

–20

–50

–70

µA

IGOFF

GATE Pin Current

Gate Off, VGATEn = VEE + 5V

●

300

µA

IGPD

GATE Pin Short-Circuit Pull-Down

VGATEn = VEE + 2V

∆VGATE

External Gate Voltage (VGATEn – VEE)IGATEn = – 1µA (Note 3)

●

Output Voltage Sense

VPG

Power Good Threshold Voltage

VOUTn – VEE

●

123

IVOUT

Out Pin Bias Current

0V > VOUTn > –10V

●

–6

µA

–10V > VOUTn > –30V

●

–18

µA

VOUTn = –48V

–20

µA

Current Sense

VCUT

Overcurrent Detection Sense Voltage

VSENSEn – VEE, VOUT = VEE (Note 7)

166

187.5

199

VLIM

Current Limit Sense Voltage

VSENSEn – VEE, VOUTn = VEE

201

212.5

224

VSENSEn – VEE, VOUTn = AGND – 30V

201

224

VSENSEn – VEE, VOUTn = AGND – 10V

30.2

VMIN

DC Disconnect Sense Voltage

VSENSEn – VEE

2.52

3.75

4.97

VSC

Short-Circuit Sense Voltage

275

ISENSE

SENSE Pin Bias Current

VSENSEn = VEE

–50

µA

Digital Interface

VOLD

Digital Output Low Voltage

ISDAOUT = 3mA, IINT = 3mA

●

0.4

ISDAOUT = 5mA, IINT = 5mA

●

0.7

VILD

Digital Input Low Voltage

SCL, SDAIN, RESET, SHDN

n, AUTO, ADn

●

0.8

VIHD

Digital Input High Voltage

SCL, SDAIN, RESET, SHDN

n, AUTO, ADn

●

2.4

RPU

Pull-Up Resistor to VDD

n, RESET, SHDNn

Ω

RPD

Pull-Down Resistor to DGND

AUTO

Ω

AC Characteristics

tDETDLY

Detection Delay

From Detect Command or Application of PD to Port

●

170

590

to Detect Complete (Figure 2)

tDET

Detection Duration

Time to Measure PD Signature Resistance (Figure 2)

●

170

230

tCLSDLY

Classification Delay

From Successful Detect in Auto or Semiauto Mode

●

10.1

to Class Complete

From Classify Command in Manual Mode (Figure 2)

●

10.1

420

tCLASS

Classification Duration

(Figure 2)

●

10.1

tPON

Power On Delay, Auto Mode

From Valid Detect to Port On in Auto Mode (Figure 2)

●

130

From Port On Command to GATE Pin Current = IGON

●

1ms

(Note 9)

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