LTC3588-2
Piezoelectric Energy
Harvesting Power Supply
with 14V Minimum V
IN
FeaTures
DescripTion
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1500nA Input Quiescent Current (Output in
The LTC®3588-2 integrates a low-loss full-wave bridge
rectifier with a high efficiency buck converter to form a
complete energy harvesting solution optimized for high
output impedance energy sources such as piezoelectric
transducers.
Regulation – No Load, V = 18V)
IN
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830nA Input Quiescent Current in UVLO, V = 12V
IN
14V to 20V Input Operating Range
Integrated Low-Loss Full-Wave Bridge Rectifier
16V UVLO Improves Power Utilization from High
Voltage Current Limited Inputs
Anultralowquiescentcurrentundervoltagelockout(UVLO)
mode with a 16V rising threshold enables efficient energy
extraction from piezoelectric transducers with high open
circuit voltages. This energy is transferred from the input
capacitor to the output via a high efficiency synchronous
buck regulator. The 16V UVLO threshold also allows for
input to output current multiplication through the buck
regulator. The buck features a sleep state that minimizes
bothinputandoutputquiescentcurrentswhileinregulation.
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Up to 100mA of Output Current
High Efficiency Integrated Hysteretic Buck DC/DC
Selectable Output Voltages: 3.45V, 4.1V, 4.5V, 5.0V
Input Protective Shunt – Up to 25mA Pull-Down at
V ≥ 20V
IN
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Available in 10-Lead MSE and 3mm × 3mm DFN
Packages
Four output voltages of 3.45V, 4.1V, 4.5V and 5.0V are
pin selectable with up to 100mA of continuous output
applicaTions
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Piezoelectric Energy Harvesting
current, and suit Li-Ion and LiFePO batteries as well as
4
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Electro-Mechanical Energy Harvesting
supercapacitors. An input protective shunt set at 20V
provides overvoltage protection.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
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Low Power Battery Charging
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Wireless HVAC Sensors
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Mobile Asset Tracking
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Tire Pressure Sensors
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Battery Replacement for Industrial Sensors
Typical applicaTion
High Voltage Piezoelectric Energy Harvesting Power Supply
LTC3588-2 5.0V Regulator Start-Up Profile
20
C
= 10µF, C
= 47µF
STORAGE
IN
V
IN
18 NO LOAD, I = 2µA
VIN
16
14
12
10
8
MIDE V25W
PZ1
PZ2
SW
22µH
V
V
IN
OUT
LTC3588-2
1µF
6V
C
STORAGE
V
OUT
6V
CAP
PGOOD
D0, D1
10µF
25V
2
OUTPUT
VOLTAGE
SELECT
V
OUT
V
6
IN2
GND
4.7µF
6V
4
35882 TA01
2
PGOOD = LOGIC 1
400 600
0
0
200
TIME (sec)
35882 TA01b
35882fa
1