LTC3401 Datasheet, PDF (14/16 Pages) Linear Technology – 1A, 3MHz Micropower Synchronous Boost Converter

LTC3401
TYPICAL APPLICATIO S
Li-Ion to 5V at 300mA, 1MHz Step-Up Converter
L1
V_IN = 2.5V TO 4.2V
10µH
D1*
R3
1M
Li-Ion
C1
4.7µF
LTC3401
3
4
V_IN
SW
10
SHDN
7
V_OUT
2
8
MODE/SYNC FB
6
PGOOD
1
R_t
9
V_C
5
GND
R_t
30k
R2
1.65M
C3
470pF
R5
82k
R1
C4 549k
4.7pF
V_OUT
5V
300mA
C2*
22µF
0 = FIXED FREQUENCY
1 = Burst Mode OPERATION
*LOCATE COMPONENTS AS CLOSE TO
IC AS POSSIBLE
C1: TAIYO YUDEN JMK212BJ475MG
C2: TAIYO YUDEN JMK325BJ226MM
D1: ON SEMICONDUCTOR MBRM120T3
L1: SUMIDA CDC5023-100
3404 TA07a
Efficiency
100
Burst Mode OPERATION
90
80
70
1MHz
60
FIXED
FREQUENCY
50
40
30
20
10
0
0.1
V_IN = 3.6V
1
10
100
LOAD CURRENT (mA)
1000
3401 TA07b
High Efficiency, Compact CCFL Supply with Remote Dimming
C3
27pF
1kV
65
T1
1 10 2 3 4
14
V_IN = 2.5V TO 4.2V
R1
300Ω
C2
Q1 _0.22µF Q2
CCFL
L1
D1
33µF
R4
D4 _20k
DIMMING
INPUT
0V TO 2.5V
R5
Li-Ion 1M
C1
10µF
LTC3401
3
4
V_IN
SW
10
SHDN
7
V_OUT
2
8
MODE/SYNC FB
6
PGOOD
1
R_t
9
V_C
GND ⁵
R_t
150k
D2
D3
R2
10k
C5
1µF
C4
0.1µF
R3
1k
3404 TA08
C1: TAIYO YUDEN JMK212BJ106MG
C2: PANASONIC ECH-U
D1: ZETEX ZHCS-1000
D2 TO D4: 1N4148
L1: SUMIDA CD-54-330MC
Q1, Q2: ZETEX FMMT-617
T1: SUMIDA C1Q122
CCFL BACKLIGHT APPLICATION CIRCUITS
CONTAINED IN THIS DATA SHEET ARE
COVERED BY U.S. PATENT NUMBER 5408162
AND OTHER PATENTS PENDING
3401fa