lt3688fe Linear Technology Corporation, lt3688fe Datasheet - Page 25

• Manufacturer Part Number: lt3688fe
• Description: Lt3688 - Dual 800ma Step-down Switching Regulator With Power-on Reset And Watchdog Timer
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIONS
800mA
800mA
V
8V TO 36V
V
OUT1
1.8V
OUT
5V
V
IN
C4
47μF
C4
22μF
C1
4.7μF
C6
10pF
C6
10pF
6V TO 36V
3.3V and 1.8V Regulator with Power-On Reset and Watchdog Timers
and Input Under Voltage Lockout
5V and 3.3V Regulator with Power-On Reset and Watchdog Timers
ON OFF
R1
523k
R2
100k
R6
475k
R7
100k
R1
187k
R2
150k
V
C1-C5: X5R OR X7R
D1, D2: DIODES INC. B140
IN
18μH
C1-C5: X5R OR X7R
D1, D2: DIODES INC. B140
L1
RESET
μP
10μH
L1
RESET
μP
I/O
I/O
1nF
I/O
I/O
C8
1nF
C8
C1
4.7μF
C2
0.22μF
D1
C2
0.22μF
D1
BST1
SW1
DA1
FB1
RUN/SS1
WDE
WDI
WDO
RST1
RST2
EN/UVLO
CONFIG
EN/UVLO
BST1
SW1
DA1
FB1
RUN/SS1
WDE
WDI
WDO
RST1
RST2
LT3688
V
GND
IN
V
LT3688
IN
GND
CONFIG
RUN/SS2
C
C
RUN/SS2
SYNC
C
BST2
BIAS
POR1
POR2
SW2
DA2
WDT
FB2
C
C
RT
SYNC
C
BST2
BIAS
SW2
POR1
POR2
DA2
WDT
FB2
RT
1nF
C9
f
SW
1nF
C9
f
SW
D2
R5
110k
C3
0.22μF
= 500kHz
D2
R5
110k
C3
0.22μF
= 500kHz
C11
4.7nF
12μH
L2
C11
4.7nF
12μH
L2
C10
4.7nF
C10
4.7nF
R3
316k
R4
100k
R3
316k
R4
100k
3688 TA02
C12
1nF
3688 TA02
C12
1nF
C7
10pF
C7
10pF
C5
22μF
V
3.3V
800mA
C5
22μF
V
3.3V
800mA
OUT2
OUT2
LT3688
25
3688f