LTC3588-2_10 Datasheet, PDF (1/18 Pages) Linear Technology – Piezoelectric Energy Harvesting Power Supply with 14V Minimum VIN

Features
n _{1500nA Input Quiescent Current (Output in}
Regulation – No Load, V_IN = 18V)
n _{830nA Input Quiescent Current in UVLO, VIN = 12V}
n _{14V to 20V Input Operating Range}
n _{Integrated Low-Loss Full-Wave Bridge Rectifier}
n _{16V UVLO Improves Power Utilization from High}
Voltage Current Limited Inputs
n _{Up to 100mA of Output Current}
n _{High Efficiency Integrated Hysteretic Buck DC/DC}
n _{Selectable Output Voltages: 3.45V, 4.1V, 4.5V, 5.0V}
n _{Input Protective Shunt – Up to 25mA Pull-Down at}
V_IN ≥ 20V
n _{Available in 10-Lead MSE and 3mm × 3mm DFN}
Packages
Applications
n _{Piezoelectric Energy Harvesting}
n _{Electro-Mechanical Energy Harvesting}
n _{Low Power Battery Charging}
n _{Wireless HVAC Sensors}
n _{Mobile Asset Tracking}
n _{Tire Pressure Sensors}
n _{Battery Replacement for Industrial Sensors}
LTC3588-2
Piezoelectric Energy
Harvesting Power Supply
with 14V Minimum V_IN
Description
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.
An ultralow quiescent current undervoltage lockout (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
both input and output quiescent currents while in regulation.
Four output voltages of 3.45V, 4.1V, 4.5V and 5.0V are
pin selectable with up to 100mA of continuous output
current, and suit Li-Ion and LiFePO₄ batteries as well as
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.
Typical Application
High Voltage Piezoelectric Energy Harvesting Power Supply
10µF
25V
1µF
6V
4.7µF
6V
MIDE V25W
PZ1
PZ2
V_{IN LTC3588-2} SW
V_OUT
CAP
PGOOD
V_IN2
D0, D1
GND
35882 TA01
22µH
2 _OUTPUT
VOLTAGE
SELECT
V_OUT
C_STORAGE
6V
LTC3588-2 5.0V Regulator Start-Up Profile
20
C_IN = 10µF, C_STORAGE = 47µF
18 NO LOAD, I_VIN = 2µA
V_IN
16
14
12
10
8
6
V_OUT
4
2
PGOOD = LOGIC 1
0
0
200
400
600
TIME (sec)
35882 TA01b
35882fa
1