Ultra low power energy harvester and battery charger with embedded MPPT and LDOs

The SPV1050 is an ultralow power and high-efficiency energy harvester and battery charger, which implements the MPPT function and integrates the switching elements of a buck-boost converter.

The SPV1050 device allows the charge of any battery, including the thin film batteries, by tightly monitoring the end-of-charge and the minimum battery voltage in order to avoid the overdischarge and to preserve the battery life.

The power manager is suitable for both PV cells and TEG harvesting sources, as it covers the input voltage range from 75 mV up to 18 V and guarantees high efficiency in both buck-boost and boost configuration.

Furthermore the SPV1050 device shows very high flexibility thanks also to the trimming capability of the end-of-charge and undervoltage protection voltages. In such way any source and battery is matched.

The MPPT is programmable by a resistor input divider and allows maximizing the source power under any temperature and irradiance condition.

An unregulated voltage output is available (e.g. to supply a microcontroller), while two fully independent LDOs are embedded for powering sensors and RF transceivers. Both LDOs (1.8 V and 3.3 V) can be independently enabled through two dedicated pins.

Key Features

  • Transformerless thermoelectric generators and PV modules energy harvester
  • High efficiency for any harvesting source
  • Up to 70 mA maximum battery charging current
  • Fully integrated buck-boost DC-DC converter
  • Programmable MPPT by external resistors
  • 2.6 V to 5.3 V trimmable battery charge voltage level (± 1% accuracy)
  • 2.2 V to 3.6 V trimmable battery discharge voltage level (± 1% accuracy)
  • Two fully independent LDOs (1.8 V and 3.3 V output)
  • Enable/disable LDO control pins
  • Battery disconnect function for battery protection
  • Battery connected and ongoing charge logic open drain indication pins


Technical Documentation

Product Specifications
Description Version Size
DS10044 DS10044: Ultralow power energy harvester and battery charger 4.0 1 MB
Application Notes
Description Version Size
AN4395 AN4395: Autonomous wireless multi-sensor node powered by PV cells and based on SPV1050 (SPIDEr™) 1.0 2 MB
AN4394 AN4394: Evaluation board for SPV1050 ULP harvester (boost architecture) 2.0 534 KB
AN4397 AN4397: Evaluation board for SPV1050 ULP harvester (buck-boost architecture) 2.0 584 KB
AN4396 AN4396: STEVAL-ISV021V1, energy harvesting system based on SPV1050, PV panel and battery 1.0 754 KB

HW Model & CAD Libraries

HW Model & CAD Libraries
Description Version Size
SPV1050 spice model with examples 1.0 325 KB

Presentations & Training Material

Description Version Size
Getting started with SPV1050 1.0 720 KB

Publications and Collaterals

Description Version Size
Harvest the maximum power from ambient energy 1.0 958 KB
Description Version Size
Brochure Power management guide 05.2016 4 MB

Tools and Software

Evaluation Tools
Solution Evaluation Tools

Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
SPV1050-WST TESTED USWF Not Applicable -40 85 Preview 1.15 1000 NEC EAR99 - MORE INFO

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SPV1050TTR ActiveVFQFPN 20 3x3IndustrialEcopack2 0 0
SPV1050-WST PreviewTESTED USWFIndustrialN/A

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.