Datasheet

LT8608/LT8608B
24
Rev. D
For more information www.analog.com
D16877 0-3/19(D)
www.analog.com
 ANALOG DEVICES, INC. 2016-2019
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LT8609/
LT8609A
42V, 2A/3A Peak, 93% Efficiency, 2.2MHz Synchronous MicroPower
Step-Down DC/DC Converter with I
Q
=2.5µA
V
IN
=3.2Vto42V, V
OUT(MIN)
=0.8V, I
Q
=2.5µA, I
SD
<1µA,
MSOP-10E Package
LT8610A/
8610AB
42V, 3.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
=2.5µA
V
IN
=3.4Vto42V, V
OUT(MIN)
=0.97V, I
Q
=2.5µA, I
SD
<1µA,
MSOP-16E Package
LT8610AC 42V, 3.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
=2.5µA
V
IN
=3Vto42V, V
OUT(MIN)
=0.8V, I
Q
=2.5µA, I
SD
<1µA,
MSOP-16E Package
LT8610 42V, 2.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
=2.5µA
V
IN
=3.4V to42V, V
OUT(MIN)
=0.97V, I
Q
=2.5µA, I
SD
<1µA,
MSOP-16E Package
LT8611 42V, 2.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
=2.5µA and Input/Output Current Limit/Monitor
V
IN
=3.4V to42V, V
OUT(MIN)
=0.97V, I
Q
=2.5µA, I
SD
<1µA,
3mm×5mm QFN-24 Package
LT8616 42V, Dual 2.5A + 1.5A, 95% Efficiency, 2.2MHz Synchronous
MicroPower Step-Down DC/DC Converter with I
Q
=5µA
V
IN
=3.4V to42V, V
OUT(MIN)
=0.8V, I
Q
=5µA, I
SD
<1µA,
TSSOP-28E, 3mm×6mm QFN-28 Packages
LT8620 65V, 2.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
=2.5µA
V
IN
=3.4V to65V, V
OUT(MIN)
=0.97V, I
Q
=2.5µA, I
SD
<1µA,
MSOP-16E, 3mm×5mm QFN-24 Packages
LT8614 42V, 4A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
=2.5µA
V
IN
=3.4V to42V, V
OUT(MIN)
=0.97V, I
Q
=2.5µA, I
SD
<1µA,
3mm×4mm QFN-18 Package
LT8612 42V, 6A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
=2.5µA
V
IN
=3.4V to42V, V
OUT(MIN)
=0.97V, I
Q
=3.0µA, I
SD
<1µA,
3mm×6mm QFN-28 Package
LT8640 42V, 5A/7A Peak, 96% Efficiency, 3MHz Synchronous MicroPower Step-
Down DC/DC Converter with I
Q
=2.5µA
V
IN
=3.4V to42V, V
OUT(MIN)
=0.97V, I
Q
=2.5µA, I
SD
<1µA,
3mm×4mm QFN-18 Package
LT8602 42V, Quad Output (2.5A+1.5A+1.5A+1.5A) 95% Efficiency, 2.2MHz
Synchronous MicroPower Step-Down DC/DC Converter with I
Q
=25µA
V
IN
=3V to42V, V
OUT(MIN)
=0.8V, I
Q
=25µA, I
SD
<1µA,
6mm×6mm QFN-40 Package
3.3V and 1.8V with Ratio Tracking
C7
0.1µF
C8
4.7µF
R9
31.6k
R10
10k
C10
47µF
C11
10pF
L2
2.2µH
R5
18.2k
R6
1M
R7
768k
R8
100k
C12
1µF
V
IN
EN/UV
SYNC
LT8608
INTV
CC
TR/SS
RT
GND
FB
PG
SW
BST
POWER
GOOD
f
SW
= 2MHz
V
OUT
1.8V
1.5A
8608 TA02
C2, C8 X7R 1206
C4, C10, X7R 1210
C1
0.1µF
C2
4.7µF
C3
1µF
C4
47µF
C5
10pF
L1
2.2µH
R1
18.2k
R2
1M
R3
309k
R4
100k
C6
10nF
V
IN
EN/UV
LT8608
INTV
CC
TR/SS
RT
GND
FB
PG
SW
BST
V
IN
3.9V
TO 42V
POWER
GOOD
f
SW
= 2MHz
V
OUT
3.3V, 1.5A
SYNC
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