LT8611
absoluTe MaxiMuM raTings
(Note 1)
pin conFiguraTion
TOP VIEW
ICTRL
IMON
ISN
ISP
20 FB
19 PG
18 BIAS
25
GND
17 INTV
CC
16 BST
15 SW
14 SW
13 SW
9 10 11 12
NC
NC
NC
UDD PACKAGE
24-LEAD (3mm
×
5mm) PLASTIC QFN
θ
JA
= 40°C/W,
θ
JC(PAD)
= 5°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
NC
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
24 23 22 21
SYNC 1
TR/SS 2
RT 3
EN/UV 4
V
IN
5
V
IN
6
PGND 7
PGND 8
orDer inForMaTion
LEAD FREE FINISH
LT8611EUDD#PBF
LT8611IUDD#PBF
TAPE AND REEL
LT8611EUDD#TRPBF
LT8611IUDD#TRPBF
PART MARKING*
LGBR
LGBR
PACKAGE DESCRIPTION
24-Lead (3mm
×
5mm) Plastic QFN
24-Lead (3mm
×
5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–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.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
elecTrical characTerisTics
PARAMETER
Minimum Input Voltage
V
IN
Quiescent Current
CONDITIONS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
MIN
l
TYP
2.9
1.0
1.0
1.7
1.7
0.46
24
210
MAX
3.4
3
8
4
10
2
50
350
0.973
0.984
0.02
20
3.57
3.35
UNITS
V
µA
µA
µA
µA
mA
µA
µA
V
V
%/V
nA
V
V
8611f
V
EN/UV
= 0V, V
SYNC
= 0V
l
V
EN/UV
= 2V, Not Switching, V
SYNC
= 0V
l
V
EN/UV
= 2V, Not Switching, V
SYNC
= 2V
V
IN
Current in Regulation
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Pin Input Current
INTV
CC
Voltage
V
OUT
= 0.97V, V
IN
= 6V, Output Load = 100µA
V
OUT
= 0.97V, V
IN
= 6V, Output Load = 1mA
V
IN
= 6V, I
LOAD
= 0.5A
V
IN
= 6V, I
LOAD
= 0.5A
V
IN
= 4.0V to 42V, I
LOAD
= 0.5A
V
FB
= 1V
I
LOAD
= 0mA, V
BIAS
= 0V
I
LOAD
= 0mA, V
BIAS
= 3.3V
l
l
l
l
0.967
0.956
–20
3.23
3.25
0.970
0.970
0.004
3.4
3.29
2
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
