Datasheet
LT8640/LT8640-1
2
Rev.C
For more information www.analog.com
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
V
IN
, EN/UV, PG ..........................................................42V
BIAS .......................................................................... 25V
FB, TR/SS . .................................................................4V
SYNC Voltage . ............................................................6V
Operating Junction Temperature Range (Note 2)
LT8640E/LT8640-1E .......................... –40°C to 125°C
LT8640I/LT8640-1I ............................ –40°C to 125°C
LT8640H/LT8640-1H ......................... –40°C to 150°C
Storage Temperature Range ......................–65 to 150°C
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT8640EUDC#PBF LT8640EUDC#TRPBF LGNJ
18-Lead (3mm × 4mm) Plastic QFN
–40°C to 125°C
LT8640IUDC#PBF LT8640IUDC#TRPBF LGNJ
18-Lead (3mm × 4mm) Plastic QFN
–40°C to 125°C
LT8640HUDC#PBF LT8640HUDC#TRPBF LGNJ
18-Lead (3mm × 4mm) Plastic QFN
–40°C to 150°C
LT8640EUDC-1#PBF LT8640EUDC-1#TRPBF LGVT
18-Lead (3mm × 4mm) Plastic QFN
–40°C to 125°C
LT8640IUDC-1#PBF LT8640IUDC-1#TRPBF LGVT
18-Lead (3mm × 4mm) Plastic QFN
–40°C to 125°C
LT8640HUDC-1#PBF LT8640HUDC-1#TRPBF LGVT 18-Lead (3mm × 4mm) Plastic QFN –40°C to 150°C
LT8640EUDCF#PBF LT8640EUDCF#TRPBF LHJK 18-Lead (3mm × 4mm) Plastic Side
Wettable QFN
–40°C to 125°C
LT8640IUDCF#PBF LT8640IUDCF#TRPBF LHJK 18-Lead (3mm × 4mm) Plastic Side
Wettable QFN
–40°C to 125°C
LT8640EUDCF-1#PBF LT8640EUDCF-1#TRPBF LHGX 18-Lead (3mm × 4mm) Plastic Side
Wettable QFN
–40°C to 125°C
LT8640IUDCF-1#PBF LT8640IUDCF-1#TRPBF LHGX 18-Lead (3mm × 4mm) Plastic Side
Wettable QFN
–40°C to 125°C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
20 19 18 17
7 8 9 10
TOP VIEW
UDC AND UDCF PACKAGES
18-LEAD (3mm × 4mm) PLASTIC QFN
1
BIAS
INTV
CC
BST
V
IN1
GND1
TR/SS
RT
EN/UV
V
IN2
GND2
GND1
SW
SW
GND2
FB
PG
GND
SYNC/MODE
16
15
14
13
11
2
3
4
6
21
SW
22
SW
θ
JA
= 40°C/W, θ
JC(PAD)
= 12°C/W (Note 3)
EXPOSED PAD (PINS 21, 22) ARE SW, SHOULD BE SOLDERED TO PCB
NOTE: PINS 5 AND 12 ARE REMOVED. CONFIGURATION DOES NOT MATCH
JEDEC 20-LEAD PACKAGE OUTLINE
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