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





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


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


Description Version Size
Evaluation products license agreement 1.4 128 KB


型号 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 41.65 1 NEC EAR99 ITALY MORE INFO 直接购买 Add to cart 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


型号 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.