Datasheet

LT8640/LT8640-1
30
Rev.C
For more information www.analog.com
RELATED PARTS
TYPICAL APPLICATION
2MHz 1.8V, 5A Step-Down Converter
PART DESCRIPTION COMMENTS
LT8609 42V, 2A, 94% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
= 2.5µA
V
IN(MIN)
= 3V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.8V, I
Q
= 2.5µA,
I
SD
< 1µA, MSOP-10E
LT8610A/AB 42V, 3.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-
Down DC/DC Converter with I
Q
= 2.5µA
V
IN(MIN)
= 3.4V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.97V, I
Q
= 2.5µA,
I
SD
< 1µA, MSOP-16E
LT8610AC 42V, 3.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-
Down DC/DC Converter with I
Q
= 2.5µA
V
IN(MIN)
= 3V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.8V, I
Q
= 2.5µA,
I
SD
< 1µA, MSOP-16E
LT8610 42V, 2.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-
Down DC/DC Converter with I
Q
= 2.5µA
V
IN(MIN)
= 3.4V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.97V, I
Q
= 2.5µA,
I
SD
< 1µA, MSOP-16E
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(MIN)
= 3.4V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.97V, I
Q
= 2.5µA,
I
SD
< 1µA, 3mm × 5mm QFN-24
LT8616 42V, Dual 2.5A + 1.5A, 95% Efficiency, 2.2MHz Synchronous
MicroPower Step-Down DC/DC Converter with I
Q
= 5µA
V
IN(MIN)
= 3.4V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.8V, I
Q
= 5µA,
I
SD
< 1µA, TSSOP-28E, 3mm × 6mm QFN-28
LT8620 65V, 2.5A, 94% Efficiency, 2.2MHz Synchronous MicroPower Step-
Down DC/DC Converter with I
Q
= 2.5µA
V
IN(MIN)
= 3.4V, V
IN(MAX)
= 65V, V
OUT(MIN)
= 0.97V, I
Q
= 2.5µA,
I
SD
< 1µA, MSOP-16E, 3mm × 5mm QFN-24
LT8614 42V, 4A, 96% Efficiency, 2.2MHz Synchronous Silent Switcher Step-
Down DC/DC Converter with I
Q
= 2.5µA
V
IN(MIN)
= 3.4V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.97V, I
Q
= 2.5µA,
I
SD
< 1µA, 3mm × 4mm QFN18
LT3975 42V, 2.5A, High Efficiency, 2MHz MicroPower Step-Down DC/DC
Converter with I
Q
= 2.7uA
V
IN(MIN)
= 4.3V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 1.2V, I
Q
= 2.7µA,
I
SD
< 1µA, MSOP-16E
LT3976 40V,
5A, High Efficiency, 2MHz MicroPower Step-Down DC/DC
Converter with I
Q
= 3.3uA
V
IN(MIN)
= 4.3V, V
IN(MAX)
= 40V, V
OUT(MIN)
= 1.2V, I
Q
= 3.3µA,
I
SD
< 1µA, MSOP-16E
LT8612 42V, 6A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down
DC/DC Converter with I
Q
= 2.5µA
V
IN(MIN)
= 3.4V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.97V, I
Q
= 3.0µA,
I
SD
< 1µA, 3mm × 6mm QFN-28
LT8613 42V, 6A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-
Down DC/DC Converter with Current Limiting
V
IN(MIN)
= 3.4V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.97V, I
Q
= 3.0µA,
I
SD
< 1µA, 3mm × 6mm QFN-28
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(MIN)
= 3V, V
IN(MAX)
= 42V, V
OUT(MIN)
= 0.8V, I
Q
= 2.5µA,
I
SD
< 1µA, 6mm × 6mm QFN-40
V
IN2
V
IN1
EN/UV
PG
LT8640/
LT8640-1
8640 TA07
BST
SYNC/MODE SW
TR/SS BIAS
INTV
CC
FB
RT GND
0.1µF
1µF
EXTERNAL
SOURCE >3.1V
OR GND
100µF
1210
X5R/X7R
10pF
866k
V
OUT
1.8V
5A
1µF
0603
1µF
0603
4.7µF
V
IN
3.4V TO 22V
(42V TRANSIENT)
10nF
18.2k
1µF
1µH
1M
GND2GND1
f
SW
= 2MHz
L: VISHAY IHLP2525CZ-01
 ANALOG DEVICES, INC. 2015–2019
02/19
www.analog.com
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