Datasheet

LT3688
26
3688f
TYPICAL APPLICATIONS
V
IN
LT3688
GND
CONFIG
BIASEN/UVLO
BST1
C2
0.1µF
ON OFF
C1
4.7µF
V
OUT1
5V
800mA
V
IN
6V TO 36V
C4
10µF
C6
10µF
L1
8.2µH
L2
8.2µH
R1
523k
R2
100k
R3
316k
R4
100k
C8
1nF
C9
1nF
µP
C3
0.1µF
SW1
DA1
D2D1
BST2
SW2
DA2
FB1
RUN/SS1
WDE
WDI
WDO
RST1
RST2
I/O
I/O
RESET
FB2
RUN/SS2
C
WDT
C
POR1
C
POR2
RT
SYNC
C5
22µF
C7
10pF
C12
1nF
3688 TA04
C10
4.7nF
C11
4.7nF
R5
20k
C1-C5: X5R OR X7R
D1, D2: DIODES INC. B140
f
SW
= 2MHz: 8V < V
IN
< 16V, T
J
< 85°C
V
OUT2
3.3V
800mA
2MHz Switching Frequency, 5V and 3.3V Regulator with
Power-On Reset and Watchdog Timers
V
IN
LT3688
GND
BIASEN/UVLO
BST1
C2
0.22µF
ON OFF
C1
4.7µF
V
OUT1
1.2V
800mA
V
IN
4V TO 36V
C4
100µF
L1
8.2µH
L2
15µH
R1
90.9k
R2
182k
R3
316k
R4
100k
C8
1nF
C9
1nF
µP
C3
0.22µF
SW1
DA1
D2D1
BST2
SW2
DA2
FB1
RUN/SS1
WDE
WDI
WDO
RST1
RST2
I/O
RESET
FB2
RUN/SS2
C
WDT
C
POR1
C
POR2
RT
SYNC
C5
22µF
C7
10pF
C12
1nF
3688 TA05
C10
4.7nF
C11
4.7nF
R5
143k
C1-C5: X5R OR X7R
D1, D2: DIODES INC. B140
f
SW
= 400kHz: V
IN
< 25V
V
OUT2
3.3V
800mA
WATCHDOG DEFEAT
C6
10pF
CONFIG
3.3V and 1.2V Regulator with Power-On Reset Timer and
Defeatable Watchdog, Timing Error Resets Microprocessor