Datasheet

14
LTC3401
3401fb
Li-Ion to 5V at 300mA, 1MHz Step-Up Converter
Efficiency
TYPICAL APPLICATIO S
U
3
10
2
6
1
3404 TA07a
LTC3401
V
IN
SHDN
MODE/SYNC
PGOOD
R
t
SW
V
OUT
FB
V
C
GND
4
7
8
9
5
C3
470pF
C4
4.7pF
Li-Ion
C1
4.7μF
R3
1M
R5
82k
R
t
30k
R2
1.65M
R1
549k
D1*
V
OUT
5V
300mA
L1
10μH
C2*
22μF
*LOCATE COMPONENTS AS CLOSE TO
IC AS POSSIBLE
C1: TAIYO YUDEN JMK212BJ475MG
C2: TAIYO YUDEN JMK325BJ226MM
D1: ON SEMICONDUCTOR MBRM120T3
L1: SUMIDA CDC5023-100
V
IN
= 2.5V TO 4.2V
0 = FIXED FREQUENCY
1 = Burst Mode OPERATION
LOAD CURRENT (mA)
0.1
0
EFFICIENCY (%)
10
30
40
50
100
70
3401 TA07b
20
80
90
60
110
100
1000
1MHz
FIXED
FREQUENCY
Burst Mode OPERATION
V
IN
= 3.6V
High Efficiency, Compact CCFL Supply with Remote Dimming
3
10
2
6
1
3404 TA08
LTC3401
V
IN
SHDN
MODE/SYNC
PGOOD
R
t
SW
V
OUT
FB
V
C
GND
4
7
8
9
5
C5
1μF
C4
0.1μF
Li-Ion
C1
10μF
R5
1M
R
t
150k
R2
10k
R3
1k
R4
20k
D4
D1
D2 D3
Q1
Q2
C2
0.22μF
T1
1
10 2 3
4
5
6
C3
27pF
1kV
CCFL
DIMMING
INPUT
0V TO 2.5V
V
IN
= 2.5V TO 4.2V
R1
300Ω
L1
33μF
C1: TAIYO YUDEN JMK212BJ106MG
C2: PANASONIC ECH-U
D1: ZETEX ZHCS-1000
D2 TO D4: 1N4148
CCFL BACKLIGHT APPLICATION CIRCUITS
CONTAINED IN THIS DATA SHEET ARE
COVERED BY U.S. PATENT NUMBER 5408162
AND OTHER PATENTS PENDING
L1: SUMIDA CD-54-330MC
Q1, Q2: ZETEX FMMT-617
T1: SUMIDA C1Q122