lt3645 Linear Technology Corporation, lt3645 Datasheet - Page 2

• Manufacturer Part Number: lt3645
• Description: 36v 500ma Step-down Regulator And 200ma Ldo
• Manufacturer: Linear Technology Corporation

ABSOLUTE MAXIMUM RATINGS
LT3645
(Note 1)
V
BOOST Voltage……………………………………….55V
BOOST Above SW Voltage ............................... …….25V
V
V
FB, FB2 Voltages .......................................... –0.3V to 6V
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH
LT3645EUD#PBF
LT3645IUD#PBF
LT3645EMSE#PBF
LT3645IMSE#PBF
LT3645HMSE#PBF
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
2
CC2
OUT2
IN
, EN/UVLO (Note 5) .......................…….–0.3V to 55V
Voltage .............................................. –0.3V to 16V
Voltage .............................................. –0.3V to 8V
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
16-LEAD (3mm × 3mm) PLASTIC QFN
NPG
EN2
NC
NC
θ
1
2
3
4
JA
TAPE AND REEL
LT3645EUD#TRPBF
LT3645IUD#TRPBF
LT3645EMSE#TRPBF
LT3645IMSE#TRPBF
LT3645HMSE#TRPBF
= 58.7°C/W, θ
16 15 14 13
5
UD PACKAGE
TOP VIEW
6
GND
17
7
JC
8
= 7.1°C/W
12
11
10
9
NC
V
BOOST
SW
IN
http://www.linear.com/leadfree/
PART MARKING*
LFVS
LFVS
3645
3645
3645
http://www.linear.com/tapeandreel/
EN2, NPG Voltages .................................... –0.3V to 16V
Operating Junction Temperature Range (Note 2)
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)…… ........... 300°C
LT3645E ............................................ –40°C to 125°C
LT3645I ............................................. –40°C to 125°C
LT3645H ............................................ –40°C to 150°C
PACKAGE DESCRIPTION
16-Lead Plastic QFN
16-Lead Plastic QFN
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
EN/UVLO
BOOST
θ
GND
JA
SW
DA
FB
= 40°C/W, θ
1
2
3
4
5
6
12-LEAD PLASTIC MSOP
MSE PACKAGE
TOP VIEW
JC
= 5°C/W TO 10°C/W
GND
13
12
11
10
9
8
7
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
NPG
EN2
FB2
OUT2
V
V
CC2
IN
3645f