LTC9101-3/LTC9103

4

Rev. 0

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ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main PoE Supply Voltage

AGND – VEE

l

51

57

V

LTC9103 Undervoltage Lock-Out

AGND – VEE

l

8.2

9

V

VDD

VDD Supply Voltage

VDD – DGND

l

3.0

3.3

3.6

V

Undervoltage Lock-Out

2.8

V

VDD Slew Rate, Falling

2.4 ≤ VDD – DGND ≤ 3.0 (Note 7)

20.0

mV/μs

VCAP1, VCAP2 Internal Regulator Supply Voltage

VCAP1 – DGND, VCAP2 – DGND (Note 12)

1.2

V

VCAP3

Internal 3.3V Regulator Supply Voltage

CAP3 – VEE (Note 12)

l

3

3.3

3.6

V

tCAP3EXT

CAP3 External Supply Rise Time

0.5V < CAP3 < CAP3(min), EXT3 tied to

CAP3 (Note 7)

l

1

ms

VCAP4

Internal 4.3V Regulator Supply Voltage

CAP4 – VEE (Note 12)

4.3

V

IEE

VEE Supply Current

PWRIN Pin Connected to AGND, EXT3

LOW, All Gates Fully Enhanced

7.7

11

14

mA

3.3V Rail Supply Current

From CAP3 = 3.3V (EXT3 HIGH)

4.2

5.4

6.6

mA

IDD

VDD Supply Current

(VDD – DGND) = 3.3V

l

40

60

mA

Detection

Forced Current

Load Resistance 15.5K to 32K

l

l

220

143

240

160

260

180

μA

μA

Forced Voltage

Load Resistance 18.5K to 27.5K

l

l

7

3

8

4

9

5

V

V

Detection Current Compliance

AGND – OUTn = 0V

l

0.8

0.9

mA

VOC

Detection Voltage Compliance

AGND – OUTn, Open Port

l

10.4

12

V

Detection Voltage Slew Rate

AGND – OUTn, CPORT = 150nF (Note 7)

l

0.01

V/μs

Min. Valid Signature Resistance

l

15.5

17

18.5

kΩ

Max. Valid Signature Resistance

l

27.5

29.7

32

kΩ

Classification

VCLASS

Classification Voltage

AGND – OUTn, SENSEn – VSSKn < 5mV

l

16

20.5

V

Classification Current Compliance

SENSEn – VSSKn, OUTn = AGND (Note 14) l

7

8

9

V

Classification Threshold

SENSEn – VSSKn (Note 13)

Class Signature 0 – 1

Class Signature 1 – 2

Class Signature 2 – 3

Class Signature 3 – 4

Class Signature 4 – Overcurrent

l

l

l

l

l

0.5

1.3

2.1

3.1

4.5

0.65

1.45

2.3

3.3

4.8

0.8

1.6

2.5

3.5

5.1

mV

mV

mV

mV

mV

VMARK

Classification Mark State Voltage

AGND – OUTn, SENSEn – VSSKn < 5mV

l

7.5

9

10

V

Mark State Current Compliance

OUTn = AGND

l

7

8

9

mV

Gate Driver

GATE Pin Pull-Down Current

Port Off, GATEn = VEE + 5V

1

mA

GATE Pin Fast Pull-Down Curre

GATEn = VEE + 5V

65

mA

GATE Pin On Voltage

GATEn – VEE, IGATEn = 1μA

l

11

14

V

Output Voltage Sense

VPG

Power Good Threshold Voltage

OUTn – VEE

l

2

2.4

2.8

V

OUT Pin Pull-Up Resistance to AGN

Port On

Port Off

l

300

2500

500

700

kΩ

kΩ

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. AGND – VEE = 55V and VDD – DGND = 3.3V unless otherwise noted.

(Notes 3 and 4)