Datasheet

LTC3442
16
3442fa
SW1
V
IN
SHDN/SS
R
LIM
R
T
SGND
SW2
V
OUT
FB
V
C
BURST
PGND
LTC3442
0.01µF
C
IN
: TAIYO YUDEN JMK212BJ106MG
C
OUT
: TAIYO YUDEN JMK325BJ476MM
L1: TDK RLF7030T-4R7M3R4
2.5V TO 5.5V
Li-Ion
15k
340k
200k
2.2k
0.01µF
220pF
V
OUT
3.3V
600mA
200k
470pF
3442 TA03
64.9k143k
1M
1nF
R
SNUB
**
1Ω
USB/5V
2Ω
D1
MBRM120T3
1nF
A SNUBBER RESISTOR IS REQUIRED TO PREVENT
RINGING IF THERE IS SIGNIFICANT INPUT INDUCTANCE,
SUCH AS FROM A USB CABLE
**
USB
PRESENT
2N7002
143k
C
IN
10µF
L1
4.7µH
C
OUT
22µF
TYPICAL APPLICATIO S
U
1MHz Li-Ion to 3.3V at 1.2A Converter with
Manual Mode Control (and Peak Current Limit Only)
SW1
V
IN
SHDN/SS
R
LIM
R
T
SGND
SW2
V
OUT
FB
V
C
BURST
PGND
LTC3442
C
IN
10µF
0.01µF
C
IN
: TAIYO YUDEN JMK212BJ106MG
C
OUT
: TAIYO YUDEN JMK325BJ226MM
L1: TDK RLF7030T-3R3M4R
2.5V TO 4.2V
Li-Ion
15k
340k 2.2k
L1
3.3µH
C
OUT
22µF
220pF
V
OUT
3.3V
1.2A
200k
470pF
3442 TA02
43.2k
BURST FIXED FREQ
1M
Multi-Input 3.3V at 600mA Boost Converter for Portable Applications
with Automatic Burst Mode Operation and Average Input Current Limit for USB Powered Devices