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Ultra low power energy harvester and battery charger with embedded MPPT and LDOs
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The SPV1050 is an ultralow power and high-efficiency energy harvester and battery charger, which implements the MPPT function and integrates all 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 less than 180 mV up to 8 V and guarantees high efficiency in both buck-boost and boost configuration, that is either in indoor or outdoor environments.

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 battery chemistry can be matched.

The MPPT is programmable by a resistor input divider and allows maximizing the source power under any temperature and irradiance condition. The MPPT function can be disabled and the duty cycle will be set according to the external voltage reference set by the user.

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 supply up to 50 mA each and can be enabled independently through two dedicated pins.

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Errata Sheet
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Key Features

  • Transformerless thermoelectric generators and PV modules energy harvester
  • High efficiency for all harvesting sources, PV cells and TEG
  • Up to 70 mA maximum battery current
  • Fully integrated buck-boost DC-DC converter
  • 2.5 V to 5.3 V trimmable battery charge voltage level (± 1% accuracy)
  • 2.1 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
  • Programmable MPPT by external resistors

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS10044: Ultralow power energy harvester and battery charger with embedded MPPT and LDOs
1.0 2,417 KB

Application Notes

Description Version Size
AN4394: Evaluation board for SPV1050 ULP harvester (boost architecture)
1.0 532 KB
AN4396: STEVAL-ISV021V1, energy harvesting system based on SPV1050, PV panel and battery
1.0 755 KB
AN4397: Evaluation board for SPV1050 ULP harvester (buck-boost architecture)
1.0 592 KB

Presentations & Training Material


Description Version Size
Getting started with SPV1050
720 KB
SPV1050 ultra-low-power energy harvester and battery charger
578 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STEVAL-IDS002V1 Autonomous wireless multi-sensor node powered by PV cells and based on SPV1050 (SPIDEr ™)
STEVAL-IDS003V1 Autonomous Wireless Multi-Sensor Node powered by thermoelectric generator and based on the SPV1050 (SPIDEr)
STEVAL-ISV019V1 Evaluation Board for SPV1050 ULP Energy Harvester and Battery Charger - Boost Configuration
STEVAL-ISV020V1 Evaluation Board for SPV1050 ULP Energy Harvester and Battery Charger - Buck-Boost Configuration
STEVAL-ISV021V1 Energy harvesting Evaluation kit based on the SPV1050

Publications and Collaterals


Description Version Size
Harvest the maximum power from ambient energy
958 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
SPV1050-WSTPreviewTESTED USWFNot Applicable-4085_-1.15No availability reported, please contact our Sales officeN/A-
SPV1050TTRPreviewVFQFPN 20 3x3Tape And Reel-4085_-1.15No availability reported, please contact our Sales officeEcopack2-

(*) 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
(**) The Material Declaration forms available on 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.
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