Datasheet

LTC3129
23
3129fa
For more information www.linear.com/LTC3129
Typical applicaTions
Low Noise 3.6V Converter Using Bootstrap Diode to Extend Lower V
IN
Range
Hiccup Converter Powers Wireless Sensor from Indoor Lighting
Transmit Rate vs Light Level
(Fluorescent)
LIGHT LEVEL (Lx)
0
TRANSMIT RATE (Hz)
4.5
4.0
2.0
3.5
3.0
2.5
1.5
1.0
0.5
0
3129 TA02b
2000
800 1200 1600400
BST1
V
OUT
V
OUT
3.6V
SW1 SW2
LTC3129
22nF
BST2
PGOOD
FB
GND
V
CC
V
IN
V
IN
1.8V TO 15V
RUN
MPPC
PWM
V
CC
NC
NC
22nF
6.8µH
2M
BAT54
976k
10µF
10µF
33pF
2.2µF
3129 TA03
PGND
V
IN
< 3.6V, I
OUT
= 100mA
V
IN
> 3.6V, I
OUT
= 200mA
BST1
V
OUT
V
OUT
3.6V
SW1
SW2
LTC3129
22nF
BST2
PGOOD
FB
PGOOD
GND
V
CC
V
IN
V
IN
UVLO = 3.5V
RUN
MPPC
PWM
V
CC
NC
NC
22nF
4.7µH
1M
2M
976k
2.37M
4.42M
470µF
6.3V
+
10pF
22µF4.7µF
2.2µF
3129 TA02a
PGND
PV PANEL
SANYO AM-1815
4.9cm × 5.8cm
PULSED I
OUT
25mA FOR 5ms