LT3690 LINER [Linear Technology], LT3690 Datasheet - Page 18

• Manufacturer Part Number: LT3690
• Description: 42V, 2.5A Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

LT8610
TYPICAL APPLICATIONS
18
(42V TRANSIENT)
5.5V TO 42V
5.5V TO 42V
3.8V TO 42V
3.8V TO 27V
V
V
V
IN
IN
IN
V
IN
10nF
10nF
f
SW
10nF
4.7μF
f
4.7μF
f
SW
4.7μF
SW
10nF
f
3.3V Step-Down Converter
SW
3.3V Step-Down Converter
4.7μF
= 400kHz
1μF
1μF
5V Step-Down Converter
= 2MHz
5V Step-Down Converter
= 400kHz
1μF
= 2MHz
1μF
18.2k
110k
110k
18.2k
V
EN/UV
SYNC
TR/SS
INTV
V
EN/UV
SYNC
TR/SS
INTV
IN
IN
V
EN/UV
PG
SYNC
TR/SS
INTV
RT
RT
V
EN/UV
PG
SYNC
TR/SS
INTV
IN
RT
IN
CC
CC
RT
CC
LT8610
LT8610
CC
PGND
PGND
LT8610
PGND
LT8610
PGND
GND
GND
GND
BIAS
BIAS
GND
BST
BST
SW
SW
BIAS
PG
PG
BST
FB
FB
BIAS
SW
BST
FB
SW
FB
100k
100k
243k
8610 TA02
243k
8610 TA03
8610 TA05
0.1μF
0.1μF
412k
2.5μH
10pF
10μH
10pF
1M
1M
412k
8610 TA04
0.1μF
4.7pF
8.2μH
1M
0.1μF
1.8μH
4.7pF
1M
POWER GOOD
POWER GOOD
47μF
68μF
68μF
47μF
V
5V
2.5A
V
5V
2.5A
V
3.3V
2.5A
OUT
OUT
OUT
V
3.3V
2.5A
OUT
5.5V TO 42V
V
IN
4.7μF
3.4V TO 42V
(42V TRANSIENT)
FB1: TDK MPZ2012S221A
12.5V TO 42V
Ultralow EMI 5V 2.5A Step-Down Converter
BEAD
3.4V TO 15V
FB1
V
IN
V
IN
V
IN
4.7μH
4.7μF
1.8V 2MHz Step-Down Converter
10nF
f
4.7μF
SW
10nF
1.8V Step-Down Converter
4.7μF
f
12V Step-Down Converter
= 400kHz
SW
1μF
10nF
f
4.7μF
SW
1μF
= 1MHz
10nF
= 2MHz
110k
1μF
4.7μF
41.2k
V
EN/UV
PG
SYNC
TR/SS
INTV
IN
1μF
RT
18.2k
V
EN/UV
SYNC
TR/SS
INTV
f
SW
IN
CC
RT
V
EN/UV
PG
SYNC
TR/SS
INTV
52.3k
IN
LT8610
PGND
= 800kHz
CC
RT
V
EN/UV
PG
SYNC
TR/SS
INTV
LT8610
CC
PGND
IN
RT
LT8610
PGND
GND
CC
BIAS
LT8610
GND
PGND
BST
SW
FB
BIAS
GND
BST
SW
PG
FB
BIAS
BST
SW
GND
FB
BIAS
BST
SW
1M
8610 TA07
FB
0.1μF
4.7μH
4.7pF
866k
100k
88.7k
8610 TA09
0.1μF
10μH
10pF
1M
8610 TA06
1M
0.1μF
4.7pF
866k
1μH
243k
8610 TA11
0.1μF
4.7μH
10pF
1M
POWER GOOD
120μF
47μF
68μF
V
1.8V
2.5A
OUT
V
12V
2.5A
47μF
OUT
V
1.8V
2.5A
OUT
8610p
V
5V
2.5A
OUT