LTC4274AIUHF-4#PBF datasheet, PDF

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LTC4274AIUHF-4#PBF: DescriptionIC CONTROLLER POE 38-QFN; CategoryPower/power management The power supply circuit; File Size321KB，30 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LTC4274AIUHF-4#PBF Overview

IC CONTROLLER POE 38-QFN

LTC4274AIUHF-4#PBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Parts packaging code	QFN
package instruction	HVQCCN, LCC38,.2X.28,20
Contacts	38
Manufacturer packaging code	UHF
Reach Compliance Code	compliant
ECCN code	EAR99
Adjustable threshold	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	R-PQCC-N38
JESD-609 code	e3
length	7 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	38
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	HVQCCN
Encapsulate equivalent code	LCC38,.2X.28,20
Package shape	RECTANGULAR
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	3.3,54 V
Certification status	Not Qualified
Maximum seat height	0.8 mm
Maximum supply current (Isup)	5 mA
Maximum supply voltage (Vsup)	4.3 V
Minimum supply voltage (Vsup)	3 V
Nominal supply voltage (Vsup)	3.3 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED
width	5 mm
Base Number Matches	1

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FEATURES

LTC4274A/LTC4274C

Single PoE/PoE+/LTPoE++

PSE Controller

DESCRIPTION

The

LTC

4274A

is a single Power Sourcing Equipment

(PSE) controller capable of delivering up to 90W of LTPoE++

power to a compatible LTPoE++ Powered Device (PD). A

proprietary detection/classification scheme allows mutual

identification between a LTPoE++ PSE and LTPoE++ PD

while remaining compatible and interoperable with existing

Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A

feature set is a superset of the popular LTC4274. These

PSE controllers feature low-R

external MOSFETs and

0.25Ω sense resistors which are especially important at

the LTPoE++ current levels to maintain the lowest possible

heat dissipation.

The LTC4274C targets fully automatic PSE systems power-

ing Type 1 (up to 13W) PDs.

Advanced power management features include: a 14-bit

current monitoring ADC, DAC-programmable current limit,

and versatile quick port shutdown. PD Discovery uses

a proprietary dual-mode 4-point detection mechanism

ensuring excellent immunity from false PD detection.

The LTC4274A/LTC4274C includes an I

C serial interface

operable up to 1MHz.

The LTC4274A/LTC4274C is available in multiple power

grades, allowing delivered PD power of 13W, 25.5W,

38.7W, 52.7W, 70W and 90W. These controllers are avail-

able in a 38-lead 5mm × 7mm QFN package.

Compliant with IEEE 802.3at Type 1 and 2

Low Power Dissipation

0.25Ω Sense Resistance Per Channel

Very High Reliability 4-Point PD Detection

2-Point Forced Voltage

2-Point Forced Current

High Capacitance Legacy Device Detection

1MHz I

C Compatible Serial Control Interface

Midspan Backoff Timer

Supports 2-Pair and 4-Pair Output Power

Available in Multiple Power Grades

LTC4274A-1: LTPoE++

™

38.7W

LTC4274A-2: LTPoE++ 52.7W

LTC4274A-3: LTPoE++ 70W

LTC4274A-4: LTPoE++ 90W

LTC4274C: PoE 13W

Available in 38-Lead 5mm × 7mm QFN Package

APPLICATIONS

LTPoE++ PSE Switches/Routers

LTPoE++ PSE Midspans

IEEE 802.3at Type 1 PSE Switches/Routers

IEEE 802.3at Type 1 PSE Midspans

LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

LTPoE++ are trademarks of Analog Devices, Inc. All other trademarks are the property of their

respective owners.

TYPICAL APPLICATION

3.3V

10Ω

Complete Single-Port Ethernet High Power Source

SMAJ5.0A

0.1µF

DGND

AGND

AD0 AD1 AD2 AD3

SCL SDAIN SDAOUT

INT

AUTO

MSD

RESET

MID

SHDN

0.22µF

100V

10µF

10Ω

SMAJ58A

TVSBULK

LTC4274AC

BULK

–54V

1µF

100V

SENSE

GATE OUT

S1B

4274AC TA01

PORT

S1B

–54V

4274acfe

For more information

www.linear.com/LTC4274A

LTC4274AIUHF-4#PBF Related Products

	LTC4274AIUHF-4#PBF	LTC4274AIUHF-1#TRPBF	LTC4274AIUHF-2#TRPBF	LTC4274AIUHF-3#TRPBF	LTC4274AIUHF-4#TRPBF	LTC4274AIUHF-2#PBF	LTC4274CIUHF#PBF	LTC4274CIUHF#TRPBF
Description	IC CONTROLLER POE 38-QFN	IC CONTROLLER POE 38-QFN	IC CONTROLLER POE 38-QFN	IC CONTROLLER POE 38-QFN	IC CONTROLLER POE 38-QFN	IC CONTROLLER POE 38-QFN	IC CONTROLLER POE 38-QFN	IC CONTROLLER POE 38-QFN
Number of channels	1	1	1	1	1	1	1	1
Brand Name	Linear Technology	Linear Technology	Linear Technology	Linear Technology	-	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	conform to	conform to	conform to	conform to	-	conform to	conform to	conform to
Parts packaging code	QFN	QFN	QFN	QFN	-	QFN	QFN	QFN
package instruction	HVQCCN, LCC38,.2X.28,20	HVQCCN, LCC38,.2X.28,20	HVQCCN, LCC38,.2X.28,20	HVQCCN, LCC38,.2X.28,20	-	HVQCCN, LCC38,.2X.28,20	HVQCCN, LCC38,.2X.28,20	HVQCCN, LCC38,.2X.28,20
Contacts	38	38	38	38	-	38	38	38
Manufacturer packaging code	UHF	UHF	UHF	UHF	-	UHF	UHF	UHF
Reach Compliance Code	compliant	compliant	compliant	compliant	-	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99	-	EAR99	EAR99	EAR99
Adjustable threshold	YES	YES	YES	YES	-	YES	YES	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT	POWER SUPPLY MANAGEMENT CIRCUIT	POWER SUPPLY MANAGEMENT CIRCUIT	POWER SUPPLY MANAGEMENT CIRCUIT	-	POWER SUPPLY MANAGEMENT CIRCUIT	POWER SUPPLY MANAGEMENT CIRCUIT	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	R-PQCC-N38	R-PQCC-N38	R-PQCC-N38	R-PQCC-N38	-	R-PQCC-N38	R-PQCC-N38	R-PQCC-N38
JESD-609 code	e3	e3	e3	e3	-	e3	e3	e3
length	7 mm	7 mm	7 mm	7 mm	-	7 mm	7 mm	7 mm
Humidity sensitivity level	1	1	1	1	-	1	1	1
Number of functions	1	1	1	1	-	1	1	1
Number of terminals	38	38	38	38	-	38	38	38
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	-	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-	-40 °C	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	HVQCCN	HVQCCN	HVQCCN	HVQCCN	-	HVQCCN	HVQCCN	HVQCCN
Encapsulate equivalent code	LCC38,.2X.28,20	LCC38,.2X.28,20	LCC38,.2X.28,20	LCC38,.2X.28,20	-	LCC38,.2X.28,20	LCC38,.2X.28,20	LCC38,.2X.28,20
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	-	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
power supply	3.3,54 V	3.3,54 V	3.3,54 V	3.3,54 V	-	3.3,54 V	3.3,54 V	3.3,54 V
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	0.8 mm	0.8 mm	0.8 mm	0.8 mm	-	0.8 mm	0.8 mm	0.8 mm
Maximum supply current (Isup)	5 mA	5 mA	5 mA	5 mA	-	5 mA	5 mA	5 mA
Maximum supply voltage (Vsup)	4.3 V	4.3 V	4.3 V	4.3 V	-	4.3 V	4.3 V	4.3 V
Minimum supply voltage (Vsup)	3 V	3 V	3 V	3 V	-	3 V	3 V	3 V
Nominal supply voltage (Vsup)	3.3 V	3.3 V	3.3 V	3.3 V	-	3.3 V	3.3 V	3.3 V
surface mount	YES	YES	YES	YES	-	YES	YES	YES
technology	CMOS	CMOS	CMOS	CMOS	-	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	-	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	NO LEAD	NO LEAD	NO LEAD	NO LEAD	-	NO LEAD	NO LEAD	NO LEAD
Terminal pitch	0.5 mm	0.5 mm	0.5 mm	0.5 mm	-	0.5 mm	0.5 mm	0.5 mm
Terminal location	QUAD	QUAD	QUAD	QUAD	-	QUAD	QUAD	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
width	5 mm	5 mm	5 mm	5 mm	-	5 mm	5 mm	5 mm
Maker	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )

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