Datasheet

LT3640
21
3640f
3640 TA03
SYNC
D1
WDIWDI
WDE
PGOOD
1nF
1nF
1.5nF
1.5nF
32.4k
V
OUT2
1.2V/1A
V
OUT1
5V/0.8A
22µF
4.7µF
RST1
RST2
EN2
WDO
FB2
CWDT CPOR RT GND SS2 SS1
SW2
SW1EN/UVLO V
IN
V
IN
7V TO 35V
SW
LT3640
BST
V
IN2
FB1
L2
0.47µH
453k
100k
100k
OUT1
49.9k
49.9k
301k
100k
L1
4.7µH
0.22µF D2
DA
22µF
100k
100k
100k
L1: VISHAY IHLP-2020
L2: VISHAY IHLP-1616
D1: DIODES B240A
D2: CENTRAL SEMI CMDSH-4E
Typical applicaTions
2MHz 3.3V/1.3A and 1.8V/1A Buck Regulators
2MHz 5V/0.8A and 1.2V/1A Buck Regulators
3640 TA02
SYNC
D1
WDE
PGOOD
1nF
1nF
1.5nF
1.5nF
32.4k
V
OUT2
1.8V/1.1A
V
OUT1
3.3V/1.3A
V
IN2
2.5V TO 5.5V
22µF
4.7µF
RST1
RST2
EN2
WDO
WDI
L1: VISHAY IHLP-2020
L2: VISHAY IHLP-1616
D1: DIODES B240A
D2: CENTRAL SEMI CMDSH-4E
FB2
CWDT CPOR RT GND SS2 SS1
SW2
SW1EN/UVLO V
IN
V
IN
5V TO 35V
SW
LT3640
BST
V
IN2
FB1
L2
1µH
301k
100k
49.9k
100k
80.6k
49.9k
L1
3.3µH
D2
0.22µF
DA
4.7µF
22µF
3640 TA04
SYNC
WDE
PGOOD
1nF
1nF
1.5nF
1.5nF
22µF
4.7µF
RST1
RST2
WDO
WDI
FB2
CWDT CPOR RT GND SS2 SS1
SW2
SW1EN/UVLO V
IN
SW
LT3640
BST
V
IN2
FB1
68.1k
49.9k
0.22µF
DA
22µF
EN2
D1
32.4k
V
OUT2
0.6V/1A
V
OUT1
3V/0.8A
V
IN
4V TO 30V
L2
0.47µH
L1
3.3µH
D2
L1: VISHAY IHLP-2020
L2: VISHAY IHLP-1616
D1: ON SEMI MBRS230
D2: CENTRAL SEMI CMDSH2-3
2MHz 2.5V/0.8A and 0.6V/1A Buck Regulators