LTC3402_15 Datasheet, PDF (13/16 Pages) Linear Technology – 2A, 3MHz Micropower Synchronous Boost Converter

TYPICAL APPLICATIO S
Single Cell to 3V at 500mA, All Ceramic Capacitor, 3MHz Step-Up Converter
V_IN = 0.9V TO 1.5V
R3
1M
+₁
CELL
C1
3.3μF
L1
R4
2.2μH ^5.1M D1
LTC3402
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
500mA
C2
10μF
0 = FIXED FREQUENCY
1 = Burst Mode OPERATION
C1: TAIYO YUDEN JMK212BJ335MG
C2: TAIYO YUDEN JMK325BJ106MM
D1: ON SEMICONDUCTOR MBRM120T3
L1: COILCRAFT DO1608-222
3404 TA05a
LTC3402
Efficiency
90
Burst Mode
80 _OPERATION
70
60
3MHz FIXED
FREQUENCY
50
40
30
20
10
0
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
3402 TA05b
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
LTC3402
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
30.1k
R2
1.65M
C3
470pF
R5
82k
C4
R1
4.7pF 549k
V_OUT
5V
600mA
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 CDH53-100
3402 TA07a
Efficiency
100
Burst Mode OPERATION
90
80
70
1MHz
60
FIXED
FREQUENCY
50
40
30
20
10
V_IN = 3.6V
0
0.1
1
10
100
LOAD CURRENT (mA)
1000
3402 G10
3402fb
13