LTC3129_15 Datasheet, PDF (23/30 Pages) Linear Technology – 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3A Quiescent Current

TYPICAL APPLICATIONS
LTC3129
Hiccup Converter Powers Wireless Sensor from Indoor Lighting
V_IN
+
PV PANEL
SANYO AM-1815
4.9cm × 5.8cm
UVLO = 3.5V
4.7µF
4.42M
470µF
6.3V
V_CC
10pF
2.37M
22nF _4.7µH 22nF
BST1 SW1
V_IN
SW2 BST2
V_OUT
LTC3129
RUN
MPPC
PWM
NC
NC
GND
FB
PGOOD
V_CC
PGND
PULSED I_OUT
25mA FOR 5ms
22µF
2M
V_OUT
3.6V
1M
976k
PGOOD
2.2µF
3129 TA02a
Transmit Rate vs Light Level
(Fluorescent)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
400 800 1200 1600 2000
LIGHT LEVEL (Lx)
3129 TA02b
Low Noise 3.6V Converter Using Bootstrap Diode to Extend Lower V_IN Range
V_IN
1.8V TO 15V
V_CC
10µF
22nF _6.8µH 22nF
BST1 SW1
V_IN
SW2 BST2
V_OUT
LTC3129
RUN
FB
MPPC
PWM
NC
NC
GND
PGOOD
V_CC
PGND
V_IN < 3.6V, I_OUT = 100mA
V_IN > 3.6V, I_OUT = 200mA
10µF
2M
33pF
976k
2.2µF
3129 TA03
V_OUT
3.6V
BAT54
For more information www.linear.com/LTC3129
3129fb
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