LTC3405 Linear Technology, LTC3405 Datasheet - Page 14

• Manufacturer Part Number: LTC3405
• Description: Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
• Manufacturer: Linear Technology

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LTC3405
14
TYPICAL APPLICATIO S
100
90
80
70
60
50
40
30
0.1
100
90
80
70
60
50
40
30
0.1
V
IN
= 4.2V
OUTPUT CURRENT (mA)
1
V
OUTPUT CURRENT (mA)
1
V
IN
IN
= 3.6V
= 2.7V
V
10
IN
TO 4.2V
V
TO 4.2V
= 3.6V
IN
10
2.7V
V
= 4.2V
2.7V
IN
Using All Ceramic Capacitors Optimized for Smallest Footprint
V
V
IN
IN
U
100
= 2.7V
100
3405 TA03b
C
2.2 F
CER
Using Ceramic and Tantalum Output Capacitors
IN
C
1 F
CER
IN
**
3405 TA02b
**
1000
Single Li-Ion to 1.8V/300mA Regulator
Single Li-Ion to 1.8V/200mA Regulator
1000
4
1
6
4
1
6
V
RUN
MODE
IN
V
RUN
MODE
LTC3405
IN
LTC3405
GND
GND
2
2
SW
V
FB
SW
V
FB
3
5
3
5
698k
3405 TA02a
1M
4.7 H*
3405 TA03a
200k
22pF
887k
3.3 H*
22pF
332k
***
**
**
*
†
*
†
TAIYO YUDEN LB2016T3R3M
TAIYO YUDEN CERAMIC JMK107BJ105MA
TAIYO YUDEN CERAMIC JMK212BJ475MG
MURATA LQH3C4R7M34
TAIYO YUDEN CERAMIC LMK212BJ225MG
TAIYO YUDEN CERAMIC JMK107BJ105MA
AVX TAJA226M006R
AC COUPLED
AC COUPLED
100mV/DIV
200mA/DIV
200mA/DIV
100mV/DIV
200mA/DIV
200mA/DIV
C
1 F
CER
I
I
V
LOAD
V
OUT1
LOAD
OUT
OUT
V
1.8V
I
C
4.7 F
CER
I
L
L
OUT
OUT
***
V
V
I
V
I
LOAD =
LOAD =
IN
OUT
IN
†
+
= 3.6V
= 3.6V
= 1.8V
100mA TO 250mA
100mA TO 250mA
C
22 F
TANT
V
1.8V
OUT2
OUT
†
40 s/DIV
40 s/DIV
3405 TA02c
3405 TA03c
sn3405 3405fs