Datasheet

LTC3534
15
3534fb
For more information www.linear.com/LTC3534
Typical applicaTions
+
SW1
R
FF
10k
R
SS
200k
C
SS
0.056µF
R
Z
15k
R2
162k
R1
649k
3534 TA02a
C
Z1
33pF
C
P1
330pF
C
P2
10pF
C
OUT
22µF
V
OUT
5V
500mA
SW2
PGND2PGND1 GND
PV
IN
V
IN
PWM
RUN/SS
*BURST PWM
V
OUT
FB
V
C
L1
5µH
LTC3534
C
IN
10µF
4 ALKALINE/
NiMH CELLS
V
IN
3.6V TO 6.4V
L1: COILCRAFT MSS7341
*PWM MUST BE DRIVEN HIGH DURING START-UP. WHEN V
OUT
IS IN REGULATION,
THE PWM PIN MAY BE DRIVEN LOW TO COMMAND BURST MODE OPERATION.
LOAD CURRENT (mA)
EFFICIENCY (%)
3534 TA02b
100
90
50
60
70
80
40
30
10
20
0.01 0.1 100 1000101
Burst
Mode
OPERATION
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 6.4V
4 Alkaline/NiMH to 5V at 500mA
4 Alkaline/NiMH Cells to 5V Efficiency vs I
LOAD