Datasheet
LT8612
2
8612fa
For more information www.linear.com/LT8612
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)
LT8612E ............................................. –40°C to 125°C
LT8612I .............................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
11
TOP VIEW
29
GND
UDE PACKAGE
28-LEAD (3mm × 6mm) PLASTIC QFN
12 13 14
28 27 26 25
6
5
4
3
2
1
SYNC
TR/SS
RT
EN/UV
V
IN
V
IN
V
IN
PGND
PGND
PGND
FB
PG
BIAS
INTV
CC
BST
SW
SW
SW
SW
SW
NC
NC
NC
NC
GND
GND
GND
GND
7
19
20
21
22
23
24
18
8
9
10
17
16
15
θ
JA
= 40°C/W, θ
JC(PAD)
= 5°C/W
EXPOSED PAD (PIN 29) 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
LT8612EUDE#PBF LT8612EUDE#TRPBF LGHW 28-Lead (3mm × 6mm) Plastic QFN –40°C to 125°C
LT8612IUDE#PBF LT8612IUDE#TRPBF LGHW 28-Lead (3mm × 6mm) 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
5
20
µA
µA
V
EN/UV
= 2V, Not Switching, V
SYNC
= 0V
l
1.7
1.7
6
20
µA
µA
V
EN/UV
= 2V, Not Switching, V
SYNC
= 2V 0.3 0.6 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
230
60
370
µA
µA
Feedback Reference Voltage V
IN
= 12V, I
LOAD
= 500mA
V
IN
= 12V, I
LOAD
= 500mA
l
0.964
0.958
0.970
0.970
0.976
0.982
V
V
Feedback Voltage Line Regulation
V
IN
= 4.0V to 25V, I
LOAD
= 0.5A
l
0.004 0.025 %/V
Feedback Pin Input Current V
FB
= 1V –20 0.5 20 nA
http://www.linear.com/product/LT8612#orderinfo
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