Datasheet

LTC3455/LTC3455-1
28
3455fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006
LT 0708 REV C • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
LT1616 500mA (I
OUT
), 1.4MHz, High Effi ciency Step-Down
DC/DC Converter
90% Effi ciency, V
IN
: 3.6V to 25V, V
OUT(MIN)
= 1.25V, I
Q
= 1.9mA,
I
SD
<1μA, ThinSOT
LTC1879 1.2A (I
OUT
), 550kHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.7V to 10V, V
OUT(MIN)
= 0.8V, I
Q
= 15μA,
I
SD
<1μA, TSSOP16
LTC3405/LTC3405A 300mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.7V to 6V, V
OUT(MIN)
= 0.8V, I
Q
= 20μA,
I
SD
<1μA, ThinSOT
LTC3406/LTC3406B 600mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 20μA,
I
SD
<1μA, ThinSOT
LTC3407 Dual 600mA (I
OUT
), 1.5MHz, Synchronous Step-Down
DC/DC Converter
96% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40μA,
I
SD
<1μA, MS10E
LTC3412 2.5A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 60μA,
I
SD
<1μA, TSSOP16E
LTC3414 4A (I
OUT
), 4MHz, Synchronous Step-Down
DC/DC Converter
95% Effi ciency, V
IN
: 2.25V to 5.5V, V
OUT(MIN)
= 0.8V, I
Q
= 64μA,
I
SD
<1μA, TSSOP16E
LTC3440/LTC3441 600mA/1A (I
OUT
), 2MHz/1MHz, Synchronous Buck-Boost
DC/DC Converter
95% Effi ciency, V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 2.5V, I
Q
= 25μA/50μA,
I
SD
<1μA, MS/DFN
SINGLE
CELL Li-ION
3.3V TO 4.2V
+
11
10
13
14
1Ω
C7
4.7μF
C3
1μF
C5
10μF
D1
C4
4.7μF
WALL 5V
REMOVE THESE
COMPONENTS IF
WALL ADAPTER
IS NOT USED
C1 TO C8: X5R OR X7R CERAMIC
L1, L2: TOKO DB318C
D1: ON SEMI MBRM110E
ALL RESISTORS 1%
3.3V, HS
8
6
5
9
1Ω
C6
4.7μF
5.6V
USB 5V
4
2
3
18
12
249k
L2, 4.7μH
80.6k
10pF
C2
10μF
3.3V
0.5A
1
7
100k
L1, 4.7μH
80.6k
10pF
C1
10μF
1.8V
0.4A
16
17
LBO
24
23
20
21
19
22
15
C8, 0.1μF
1k
806k
1M
1.8V
V
BAT
2.49M
1M
2.49k
1M
1.8V
25
3455 TA03
μC
USB
CONTROLLER
1.24k
3.32k
ON/OFF
WALLFB
HSI
HSO
V
MAX
USB
SUSPEND
USBHP
SW2
FB2
SW1
FB1
TIMER
PROG
AI
AO
V
BAT
ON
GND
CHRG
PBSTAT
RST
MODE
LTC3455/LTC3455-1
ON2
PWRON
HSON