LT4276

2

4276fa

For more information www.linear.com/LT4276

pin conFiguraTion

absoluTe MaxiMuM raTings

HSGATE Current.................................................. ±20mA

RCLASS, RCLASS++

Voltages.................................–0.3 to 8V (and ≤ VPORT)

ISEN+, ISEN– Voltages...........................................±0.3V

FB31 Voltage..................................................+12V/–30V

RCLASS/RCLASS++ Current .............................. –50mA

AUX Current........................................................ ±1.4mA

ROSC Current ..................................................... ±100µA

RLDCMP Current ................................................±500µA

T2P Current.........................................................–2.5mA

Operating Junction Temperature Range (Note 3)

LT4276AI/LT4276BI/LT4276CI..............–40°C to 85°C

LT4276AH/LT4276BH/LT4276CH ....... –40°C to 125°C

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

(Notes 1, 2)

9 10

TOP VIEW

UFD PACKAGE

28-LEAD (4mm

× 5mm) PLASTIC QFN

11 12 13

28 27 26 25 24

14

23

6

5

4

3

2

1

GND

AUX

RCLASS++/NC*

RCLASS

T2P/NC**

DNC

PG

GND

SG

ISEN+

ISEN–

RLDCMP

7

17

18

19

20

21

22

16

8

15

29

GND

EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB

*RCLASS++ is not connected in the LT4276B and LT4276C

**T2P is not connected in the LT4276C

orDer inForMaTion

LEAD FREE FINISH

TAPE AND REEL

PART MARKING* MAX PD POWER PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT4276AIUFD#PBF

LT4276AIUFD#TRPBF

4276A

90W

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 85°C

LT4276AHUFD#PBF

LT4276AHUFD#TRPBF

4276A

90W

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 125°C

LT4276BIUFD#PBF

LT4276BIUFD#TRPBF

4276B

25.5W

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 85°C

LT4276BHUFD#PBF

LT4276BHUFD#TRPBF

4276B

25.5W

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 125°C

LT4276CIUFD#PBF

LT4276CIUFD#TRPBF

4276C

13W

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 85°C

LT4276CHUFD#PBF

LT4276CHUFD#TRPBF

4276C

13W

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

designated sales channels with #TRMPBF suffix.