16
LTC3405A
3405afa
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
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OUT
to 450mA,
LTC1174-5 Burst Mode Operation
LTC1265 1.2A, High Efficiency Step-Down DC/DC Converter Constant Off-Time, Monolithic, Burst Mode Operation
LTC1474/LTC1475 Low Quiescent Current Step-Down DC/DC Converters Monolithic, I
OUT
to 250mA, I
Q
= 10µA, 8-Pin MSOP
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OUT
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IN
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LT1616 600mA, 1.4MHz Step-Down DC/DC Converter 6-Pin ThinSOT, V
IN
from 3.6V to 25V
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OUT
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Regulation, V
IN
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OUT
to 500mA, 1MHz Operation,
V
IN
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REF
Pin, Constant Frequency, I
OUT
to 600mA,
V
IN
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IN
from 2.5V to 9.8V
LTC1877 High Efficiency Monolithic Step-Down Regulator 550kHz, MS8, V
IN
Up to 10V, I
Q
= 10µA, I
OUT
to 600mA at V
IN
= 5V
LTC1878 High Efficiency Monolithic Step-Down Regulator 550kHz, MS8, V
IN
Up to 6V, I
Q
= 10µA, I
OUT
to 600mA at V
IN
= 3.3V
LTC3404 1.4MHz High Efficiency Monolithic Step-Down Regulator 1.4MHz, MS8, V
IN
Up to 6V, I
Q
= 10µA, I
OUT
to 600mA at V
IN
= 3.3V
LTC3405A-1.5/ 1.5MHz High Efficiency Monolithic Step-Down Regulators Fixed Output Versions of the LTC3405A
LTC3405A-1.8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LT/TP 0604 1K REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2002
U
TYPICAL APPLICATIO
Single Li-Ion to 1.5V/150mA Regulator
Using All Ceramic Capacitors Optimized for Smallest Footprint
V
IN
C
IN
**
2.2µF
CER
V
IN
2.7V
TO 4.2V
*
**
LTC3405A
RUN
MODE
3
2.2µH*
22pF
887k
1M
3405A TA03a
TAIYO YUDEN LB2012T2R2M
TAIYO YUDEN CERAMIC LMK212BJ225MG
5
4
6
1
2
SW
V
FB
GND
C
OUT
**
2.2µF
CER
V
OUT
1.5V
OUTPUT CURRENT (mA)
0.1
EFFICIENCY (%)
10
1000
90
80
70
60
50
40
30
3405A TA03b
1 100
V
IN
= 2.7V
V
IN
= 4.2V
V
OUT
= 1.5V
V
IN
= 3.6V
V
OUT
100mV/DIV
AC COUPLED
I
LOAD
100mA/DIV
I
L
200mA/DIV
20µs/DIV
V
IN
= 3.6V
V
OUT
= 1.5V
I
LOAD
=
50mA TO 150mA
3405A TA03c
