Key facts
- Brand
- Linear Technology
- Model
- LTC3588
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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Linear Technology LTC3588-1 Piezoelectric Energy Harvesting Power Supply Application Note
The document introduces the LTC3588-1, an integrated power supply solution that combines a low-loss internal bridge rectifier with a synchronous step-down DC/DC converter. It is specifically engineered to manage energy harvested from high-impedance piezoelectric elements, such as those used in vibration-based wireless sensor networks.
The note details the device's operation modes, including an undervoltage lockout (UVLO) phase that draws less than a microamp of quiescent current to accumulate charge on an input capacitor. Once sufficient energy is stored, the internal buck converter transfers power to the output in short bursts. The document also covers design considerations for piezoelectric elements and storage options.
Linear Technology LTC3588 specifications
| Harvested Energy Power Range | about 1mw-10mw |
|---|---|
| Active Sensor-Transmitter Power Requirement | 1comw-250mw |
| Battery Capacity | 8mah |
| Float Voltage Setting | 4.1v |
| Maximum Float Voltage Tolerance | +1% |
| Charging Time from Empty | about 75 hours |
Source: LINEAR LTC4071_LTC3588 Manual
All Linear Technology LTC3588 documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the maximum average load current the buck converter delivers?
The buck delivers up to 100mA of average load current when switching.
From: Linear Technology LTC3588-1 Piezoelectric Energy Harvesting Power Supply Application Note
What are the selectable output voltages for this power supply?
Four output voltages, 1.8V, 2.5V, 3.3V and 3.6V, are pin selectable to accommodate powering of microprocessors.
From: Linear Technology LTC3588-1 Piezoelectric Energy Harvesting Power Supply Application Note
How is the battery protected from over-discharge?
The LTC4071 provides an internal low battery disconnect circuit to ensure the battery voltage never falls below a safe limit (e.g., 2.7v or 3.2V).
What happens when the piezoelectric transducer stops delivering power?
The system enters discharging-sending mode, where the batteries supply energy until the disconnect circuit activates to protect them.