Datasheet
LT8611
2
8611fa
For more information www.linear.com/LT8611
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
V
IN
, EN/UV, PG, ISP, ISN ...........................................42V
BIAS .......................................................................... 30V
BST Pin Above SW Pin................................................4V
FB, TR/SS, RT, INTV
CC
, IMON, ICTRL. ........................ 4V
SYNC Voltage . ............................................................6V
Operating Junction Temperature Range (Note 2)
LT8611E ................................................. –40 to 125°C
LT8611I .................................................. –40 to 125°C
Storage Temperature Range ......................–65 to 150°C
(Note 1)
24 23 22 21
9 10
TOP VIEW
25
GND
UDD PACKAGE
24-LEAD (3mm × 5mm) PLASTIC QFN
11 12
6
5
4
3
2
1
15
16
17
18
19
20
SYNC
TR/SS
RT
EN/UV
V
IN
V
IN
PGND
PGND
FB
PG
BIAS
INTV
CC
BST
SW
SW
SW
ICTRL
IMON
ISN
ISP
NC
NC
NC
NC
14
7
13
8
θ
JA
= 40°C/W, θ
JC(PAD)
= 5°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
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
LT8611EUDD#PBF LT8611EUDD#TRPBF LGBR 24-Lead (3mm × 5mm) Plastic QFN –40°C to 125°C
LT8611IUDD#PBF LT8611IUDD#TRPBF LGBR 24-Lead (3mm × 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/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. 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
2.9 3.4 V
V
IN
Quiescent Current V
EN/UV
= 0V, V
SYNC
= 0V
l
1.0
1.0
3
8
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 0.46 2 mA
V
IN
Current in Regulation V
OUT
= 0.97V, V
IN
= 6V, Output Load = 100µA
V
OUT
= 0.97V, V
IN
= 6V, Output Load = 1mA
l
l
24
210
50
350
µA
µA
Feedback Reference Voltage V
IN
= 6V, I
LOAD
= 0.5A
V
IN
= 6V, I
LOAD
= 0.5A
l
0.967
0.956
0.970
0.970
0.973
0.984
V
V
Feedback Voltage Line Regulation
V
IN
= 4.0V to 42V, I
LOAD
= 0.5A
l
0.004 0.02 %/V
Feedback Pin Input Current V
FB
= 1V –20 20 nA
INTV
CC
Voltage I
LOAD
= 0mA, V
BIAS
= 0V
I
LOAD
= 0mA, V
BIAS
= 3.3V
3.23
3.25
3.4
3.29
3.57
3.35
V
V
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