LTC3588-1 Datasheet, PDF (1/20 Pages) Linear Technology – Piezoelectric Energy Harvesting Power Supply

FEATURES
n _{950nA Input Quiescent Current (Output in}
Regulation – No Load)
n _{450nA Input Quiescent Current in UVLO}
n _{2.7V to 20V Input Operating Range}
n _{Integrated Low-Loss Full-Wave Bridge Rectifier}
n _{Up to 100mA of Output Current}
n _{Selectable Output Voltages of 1.8V, 2.5V, 3.3V, 3.6V}
n _{High Efficiency Integrated Hysteretic Buck DC/DC}
n _{Input Protective Shunt – Up to 25mA Pull-Down at}
V_IN ≥ 20V
n _{Wide Input Undervoltage Lockout (UVLO) Range}
n _{Available in 10-Lead MSE and 3mm × 3mm DFN}
Packages
APPLICATIONS
n _{Piezoelectric Energy Harvesting}
n _{Electro-Mechanical Energy Harvesting}
n _{Wireless HVAC Sensors}
n _{Mobile Asset Tracking}
n _{Tire Pressure Sensors}
n _{Battery Replacement for Industrial Sensors}
n _{Remote Light Switches}
n _{Standalone Nanopower Buck Regulator}
LTC3588-1
Piezoelectric Energy
Harvesting Power Supply
DESCRIPTION
The LTC^®3588-1 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 wide hysteresis window allows
charge to accumulate on an input capacitor until the buck
converter can efficiently transfer a portion of the stored
charge to the output. In regulation, the LTC3588-1 enters
a sleep state in which both input and output quiescent
currents are minimal. The buck converter turns on and
off as needed to maintain regulation.
Four output voltages, 1.8V, 2.5V, 3.3V and 3.6V, are pin
selectable with up to 100mA of continuous output current;
however, the output capacitor may be sized to service a
higher output current burst. An input protective shunt set
at 20V enables greater energy storage for a given amount
of input capacitance.
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
100mA Piezoelectric Energy Harvesting Power Supply
ADVANCED CERAMETRICS PFC-W14
1μF
6V
C_STORAGE
25V
4.7μF
6V
PZ1
PZ2
V_{IN LTC3588-1} SW
V_OUT
CAP
PGOOD
V_IN2
D0, D1
GND
35881 TA01
10μH
2 _OUTPUT
VOLTAGE
SELECT
V_OUT
47μF
6V
LTC3588-1 3.3V Regulator Start-Up Profile
22
20
C_STORAGE = 22μF, C_OUT = 47μF
NO LOAD, I_VIN = 2μA
18
16
14
V_IN
12
10
8
6
4
V_OUT
2
PGOOD = LOGIC 1
0
0
200
400
600
TIME (s)
35881 TA01b
35881f
1