Datasheet

LT8641
2
Rev B
For more information www.analog.com
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
V
IN
, EN/UV ................................................................65V
PG .............................................................................42V
BIAS .......................................................................... 25V
FB, TR/SS . .................................................................4V
SYNC/MODE Voltage . ................................................6V
Operating Junction Temperature Range (Note 2)
LT8641E ............................................. –40°C to 125°C
LT8641I .............................................. –40°C to 125°C
LT8641H ............................................ –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT8641EUDC#PBF LT8641EUDC#TRPBF LGSN 18-Lead (3mm × 4mm) Plastic QFN –40°C to 125°C
LT8641IUDC#PBF LT8641IUDC#TRPBF LGSN 18-Lead (3mm × 4mm) Plastic QFN –40°C to 125°C
LT8641HUDC#PBF LT8641HUDC#TRPBF LGSN 18-Lead (3mm × 4mm) Plastic QFN –40°C to 150°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.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage
l
2.6 3.0 V
V
IN
Quiescent Current V
EN/UV
= 0V
l
0.75
0.75
3
10
µA
µA
V
EN/UV
= 2V, Not Switching, V
SYNC
= 0V
l
1.7
1.7
4
10
µA
µA
V
EN/UV
= 2V, Not Switching, V
SYNC
= 2V 0.3 0.5 mA
V
IN
Current in Regulation V
OUT
= 0.8V, V
IN
= 6V, Output Load = 100µA
V
OUT
= 0.8V, V
IN
= 6V, Output Load = 1mA
l
l
17
200
50
350
µA
µA
Feedback Reference Voltage V
IN
= 6V, I
LOAD
= 0.5A
V
IN
= 6V, I
LOAD
= 0.5A
l
0.804
0.79
0.81
0.81
0.816
0.822
V
V
Feedback Voltage Line Regulation V
IN
= 4.0V to 42V, I
LOAD
= 0.5A
l
0.004 0.03 %/V
20 19 18 17
7 8 9 10
TOP VIEW
UDC PACKAGE
18-LEAD (3mm × 4mm) PLASTIC QFN
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
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
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