LTC3401 Datasheet, PDF (13/16 Pages) Linear Technology – 1A, 3MHz Micropower Synchronous Boost Converter

TYPICAL APPLICATIO S
Single Cell to 3V at 50mA, 1.2mm High, 3MHz Step-Up Converter
V_IN = 0.9V TO 1.5V
R3
1M
+₁
CELL
C1
2.2µF
L1
R4
1µH ^5.1M D1
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
10k
R2
866k
C3
470pF _C4
R1
20pF ^619k
R5
39k
V_OUT
3V
100mA
C2
4.7µF
0 = FIXED FREQUENCY
1 = Burst Mode OPERATION
C1: TAIYO YUDEN JMK212BJ225MG
C2: TAIYO YUDEN JMK212BJ475MG
D1: CENTRAL SEMICONDUCTOR CMDSH-3
L1: TAIYO YUDEN LB2016
3404 TA05a
LTC3401
Efficiency
90
Burst Mode
80
OPERATION
70
60
50
FIXED
FREQUENCY
40
30
20
10
0
0.1
V_IN = 1.2V
1
10
100
OUTPUT CURRENT (mA)
1000
3401 TA05b
Single Cell to 3V at 200mA, 600kHz Step-Up Converter
V_IN = 0.9V TO 1.5V
R3
1M
+₁
CELL
C1
3.3µF
L1
10µH
R4
5.1M D1
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
50k
R2
866k
C3
470pF
R5
82k
R1
C4
619k
4.7pF
V_OUT
3V
200mA
C2
22µF
0 = FIXED FREQUENCY
1 = Burst Mode OPERATION
C1: TAIYO YUDEN JMK212BJ335MG
C2: TAIYO YUDEN JMK325BJ226MM
D1: ON SEMICONDUCTOR MBRM120T3
L1: SUMIDA CD54-100
3404 TA06a
Efficiency
100
90
Burst Mode
80 _OPERATION
70
FIXED
60
FREQUENCY
50
40
30
20
10
0
0.1
V_IN = 1.2V
1
10
100
LOAD CURRENT (mA)
1000
3401 TA06b
3401fa
13