Datasheet

LTC3523/LTC3523-2
14
3523fb
TYPICAL APPLICATIONS
V
IN1
SW1 SW2
FB2
MODE
PGOOD2
SHDN2
FB1
PGOOD1
SHDN1
V
OUT
10pF 10μF
V
OUT2
STEP-DOWN
OUTPUT
2.5V
200mA
768k
243k
V
IN
3523 TA03
768k
243k
4.7μH
10μH
V
IN2
LTC3523
V
BAT
GND1 GND2 GND3
4.7μF
Li-Ion
V
IN
2.5V TO 4.2V
V
OUT1
STEP-UP
OUTPUT
5V
150mA
10μF
OFF ONOFF ON
+
Li-Ion to 5V/150mA, 2.5V/200mA
LOAD CURRENT (mA)
0
0
EFFICIENCY (%)
POWER LOSS (mW)
10
30
40
50
100
70
1
10
3523 TA03b
20
80
90
60
0
1
10
1000
100
100
1000
STEP-UP
STEP-DOWN
V
IN
= 3.6V
V
OUT1
= 5V
V
OUT2
= 2.5V
f
OSC
= 1.2MHz
EFFICIENCY
P0WER
LOSS
Effi ciency and Power Loss
vs Load Current