LTC4264IDE datasheet(2/24 Pages) LINER

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LTC4264

4264f

PACKAGE/ORDER INFORMATION

ELECTRICAL CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS

VIN Voltage................................................. 0.3V to –90V

VOUT Voltage ......... VIN + 90V (and ≤ GND) to VIN – 0.3V

SHDN Voltage ............................ VIN + 90V to VIN – 0.3V

RCLASS, ILIM_EN Voltage ............... VIN + 7V to VIN – 0.3V

PWRGD Voltage (Note 3)

Low Impedance Source ....VOUT + 11V to VOUT – 0.3V

Current Fed ..........................................................5mA

PWRGD Voltage ......................... VIN + 80V to VIN – 0.3V

PWRGD Current.....................................................10mA

RCLASS Current.....................................................100mA

Operating Ambient Temperature Range

LTC4264C ................................................ 0°C to 70°C

LTC4264I ............................................. –40°C to 85°C

Junction Temperature ........................................... 150°C

Storage Temperature Range................... –65°C to 150°C

(Notes 1, 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Supply Voltage

IEEE 802.3af System

Signature Range

Classiﬁcation Range

UVLO Turn-On Voltage

UVLO Turn-Off Voltage

Voltage with Respect to GND Pin

(Notes 5, 6, 7, 8)

●

–1.5

–12.5

–37.7

–29.8

–38.9

–30.6

–57

–10.1

–21

–40.2

–31.5

IIN_ON

IC Supply Current when On

VIN = –54V

●

3mA

IIN_CLASS

IC Supply Current During Classiﬁcation

VIN = –17.5V (Note 9)

●

0.55

0.62

0.70

ΔICLASS

Current Accuracy During Classiﬁcation

10mA < ICLASS < 75mA, –12.5V ≤ VIN ≤ –21V

(Notes 10,11)

●

±3.5

tCLASSRDY

Classiﬁcation Stability Time

VIN Stepped 0V to –17.5V, IIN_CLASS ≤3.5% of

Ideal, 10mA < ICLASS < 75mA (Notes 10, 11)

●

1ms

RSIGNATURE

Signature Resistance

–1.5V ≤ VIN ≤ –10.1V, IEEE 802.3af 2-Point

Measurement, SHDN Tied to VIN (Notes 6, 7)

●

23.25

26.00

RINVALID

Invalid Signature Resistance

–1.5V ≤ VIN ≤ –10.1V, IEEE 802.3af 2-Point

Measurement, SHDN Tied to GND (Notes 6, 7)

●

11.8

VIH_SHDN

SHDN High Level Input Voltage

With Respect to VIN, High Level = Shutdown

(Note 12)

●

357

VIL_SHDN

SHDN Low Level Input Voltage

With Respect to VIN

●

0.45

RINPUT_SHDN

SHDN Input Resistance

With Respect to VIN

●

100

kΩ

VIH_ILIM

ILIM_EN High Level Input Voltage

With Repect to VIN, High Level Enables Current

Limit (Note 13)

●

GND

PWRGD

VOUT

SHDN

RCLASS

ILIM_EN

VIN

TOP VIEW

DE12 PACKAGE

12-LEAD (4mm

× 3mm) PLASTIC DFN

TJMAX = 150°C, θJA = 43°C/W, θJC = 4.3°C/W

EXPOSED PAD (PIN 13) MUST BE SOLDERED TO

AN ELECTRICALLY ISOLATED HEAT SINK

ORDER PART NUMBER

DE PART MARKING*

LTC4264CDE

LTC4264IDE

4264

Order Options Tape and Reel: Add #TR

Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges.

*The temperature grade is identiﬁed by a label on the shipping container.

The

● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. (Note 4)

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