1 A, high efficiency single inductor DC-DC converter based on the STBB1-APUR

The STEVAL-ISA063V2 demonstration board implements a typical buck-boost DC-DC converter based on STMicroelectronics’ STBB1-APUR high efficiency single inductor dual mode buck-boost DC-DC converter.

The device is fixed frequency and capable of providing output voltages ranging from 1.2 V to 5.5 V and input voltages from 2.0 V to 5.5 V.

The STBB1-APUR can operate with input voltages higher than, equal to, or lower than the output voltage, rendering the product suitable for single lithium-ion (Li-Ion), multicell alkaline or NiMH applications where the output voltage is within the battery voltage range.

The integrated low-RDSonN-channel and P-channel MOSFET switches contribute to its high efficiency.

Key Features

  • Buck-boost DC-DC converter
  • Operating input voltage range: 2.0 V to 5.5 V
  • 2% DC feedback voltage tolerance
  • Synchronous rectification
  • Shutdown function
  • 1.5 MHz switching frequency
  • Power save mode at light load
  • Typical efficiency: > 94%
  • 1 A output current capability
  • Shutdown current: < 1 μA
  • RoHS compliant




Technical Documentation

Product Specifications
Description Version Size
DB1508 DB1508: 1 A, high efficiency single inductor DC-DC converter based on the STBB1-APUR 1.1 76 KB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-ISA063V2 gerber files 1.0 31 KB
Bill of Materials
Description Version Size
Schematic Pack
Description Version Size
STEVAL-ISA063V2 schematics 1.0 24 KB


License Agreement
Description Version Size
Evaluation products license agreement 1.4 128 KB
Support & Community

Sample & Buy

Part Number Core Product Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-ISA063V2 STBB1-APUR Active 45 1 NEC EAR99 ITALY MORE INFO No availability reported, please contact our Sales office

(*) 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**
STEVAL-ISA063V2 ActiveCARDIndustrialEcopack2

(**) 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.