Datasheet

LTC3458
14
3458fa
TYPICAL APPLICATIO S
U
V
IN
GND/PGND
SHDN
SYNC
R
T
I
LIM
SW
V
OUT
FB
COMP
SS
BURST
LTC3458
Li-Ion
2.5V to 4.2V
2.2μF
WURTH
12μH
774775112
ON OFF
243k 124k 133k
324k
33k
0.01μF
0.01μF
560pF
10pF
10pF
1M
22μF
X5R
V
OUT
5V
450mA
3458 TA03a
V
IN
GND/PGND
SHDN
SYNC
R
T
I
LIM
SW
V
OUT
FB
COMP
SS
BURST
LTC3458
2 ALKALINE
1.8V to 3.3V
2.2μF
WURTH
12μH
774775112
ON OFF
243k 124k 133k
324k
33k
0.01μF
0.01μF
560pF
10pF
1M
22μF
X5R
V
OUT
5V
200mA
3458 TA04a
10pF
V
IN
GND/PGND
SHDN
SYNC
R
T
I
LIM
SW
V
OUT
FB
COMP
SS
BURST
LTC3458
Li-Ion
2.5V to 4.2V
2.2μF
COEV
10μH
DQ7545
ON OFF
200k 124k 133k
316k
33k
0.01μF
0.01μF
560pF
10pF
1.5M
22μF
X5R
V
OUT
7V
250mA
3458 TA05a
10pF
Lithium-Ion to 5V, 500mA at 850kHz
Two Cell to 5V
OUT
, 200mA at 850kHz
Lithium-Ion Battery to 7V
OUT
, 250mA at 1MHz
LOAD CURRENT (mA)
EFFICIENCY
100
95
90
85
80
75
70
65
0.1 10 100 1000
3458 TA03b
1
4.2V
IN
3.6V
IN
2.5V
IN
LOAD CURRENT (mA)
EFFICIENCY
100
95
90
85
80
75
70
65
0.1 10 100 1000
3458 TA04b
1
3.3V
IN
1.8V
IN
LOAD CURRENT (mA)
EFFICIENCY
100
95
90
85
80
75
70
65
0.1 10 100 1000
3458 TA05b
1
4.2V
IN
3.6V
IN
2.5V
IN
Li-Ion to 5V
OUT
Two Alkaline to 5V
OUT
Li-Ion to 7V
OUT