LTC3527-1_15 Datasheet, PDF (18/22 Pages) Linear Technology – Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters

LTC3527/LTC3527-1
TYPICAL APPLICATIONS
+ ^{1.8V TO 3.2V}
+
ALKALINE
CELLS
V_OUT
5V
300mA
C_OUT1
4.7μF
ON
OFF
1.2MHz, 2-Cell to V_OUT1 = 5V, V_OUT2 = 3.3V
C_IN
4.7μF _10μH
V_IN1 V_IN V_IN2
3.24M
1.02M
SW1
SW2
V_OUT1
15pF
FB1
LTC3527
V_OUT2
FB2
PGOOD1
SHDN1
PGOOD2
SHDN2
MODE GND FSEL
4.7μH
15pF 1.78M
1M
ON
OFF
L: SUMIDA CDRH3D164R7
C_IN, C_OUT: TAIYO YUDEN X5R JMK212BJ475MD
35271 TA05
V_OUT
3.3V
200mA
C_OUT2
4.7μF
Boost 1 Efficiency
100
2.4V 3V
90
BURST
80
1.8V
70
1.8V
3V
2.4V
60
50
40
30
FIXED
20
0.01
0.1
1
10 100 1000
LOAD CURRENT (mA)
35271 TA05b
Boost 2 Efficiency
100
2.4V
3V
90 _BURST
1.8V
80
70
3V
2.4V
1.8V
60
FIXED
50
40
30
20
0.01
0.1
1
10 100 1000
LOAD CURRENT (mA)
35271 G05
35271fc
18