LTC3330_15 Datasheet, PDF (26/32 Pages) Linear Technology – Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Life Extender

LTC3330
APPLICATIONS
MIDE V25W
22µH
22µF
25V
4.7µF, 6.3V
1µF, 6.3V
AC2
V_IN
CAP
V_IN2
AC1 SWB SWA
LTC3330
SW
V_OUT
SCAP
UV3
BAL
UV2
UVLOR = 14V*
UVLOF = 13V
UV1
IPEAK_BB = 250mA
UV0
LDO_IN
LDO2
LDO1
LDO0
BAT
LDO_EN
PGVOUT
PG_LDO
4.7µF
6.3V
+
Li-ION
EH_ON
LDO_OUT
GND
V_IN3
IPK2 IPK1 IPK0 OUT2 OUT1 OUT0
22µH
1µF
6.3V
1.8V
22µF
6.3V
1.5V
22µF
6.3V
26
*FOR PEAK POWER TRANSFER, CENTER THE UVLO WINDOW
AT HALF THE RECTIFIED OPEN CIRCUIT VOLTAGE OF THE PIEZO
Efficiency Comparison Between Normal Buck-Boost
and Bypassed SWB Configuration
3330 F09a
100
L = 22µH, DCR = 0.36Ω, 100mA LOAD
95
90
V_OUT = 1.8V, BYPASS SWB
V_OUT = 1.8V, INCLUDE SWB
85
V_OUT = 3.3V, BYPASS SWB
V_OUT = 3.3V, INCLUDE SWB
80
75
2.5 3 3.5 4 4.5 5 5.5
BAT (V)
3330 F09b
Figure 9. Higher Efficiency Battery Powered Buck Regulator
For more information www.linear.com/LTC3330
3330fb