LT3685 LINER [Linear Technology], LT3685 Datasheet - Page 26

• Manufacturer Part Number: LT3685
• Description: 36V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
LT3690
26
SLEEP: V
WAKE UP: V
14V TO 36V
V
IN
IN
< 12.3V
IN
> 13.4V
AUXILIARY SUPPLY
AUXILIARY SUPPLY
10µF
3.9V TO 36V
3.9V TO 36V
3.3V OR 5V
3.3V OR 5V
200k
21k
1nF
10nF
1nF
V
V
IN
IN
16k
14k
5V Step-Down Converter with Undervoltage Lockout
15k
1nF
2.2nF
1nF
10µF
ON OFF
ON OFF
2×
10µF
ON OFF
0.47µF
0.47µF
0.47µF
1.8V Step-Down Converter
1.2V Step-Down Converter
(FIXED FREQUENCY AT V
ƒ = 500kHz
ƒ = 170kHz
ƒ = 500kHz
UVLO
EN
SS
V
V
SYNC
UVLO
EN
SS
V
V
SYNC
UVLO
EN
SS
V
V
SYNC
C
CCINT
C
CCINT
C
CCINT
V
V
V
IN
IN
IN
LT3690
LT3690
LT3690
GND
GND
GND
BIAS
BIAS
BIAS
IN
< 18.5V)
BST
BST
BST
SW
SW
SW
PG
PG
PG
RT
RT
RT
FB
FB
FB
1µF
1µF
0.68µF
0.68µF
0.68µF
40.2k
140k
40.2k
100k
100k
4.7µH
8.2µH
4.7µH
15k
46.4k
102k
18.7k
23.2k
L
L
L
536k
3690 TA05
3690 TA07
POWER GOOD
POWER GOOD
100µF
100µF
100µF
V
1.8V
4A
V
1.2V
4A
V
5V
4A
OUT
OUT
OUT
3690 TA06
+
680µF
LOW ESR
3690f