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

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Parameter NameParameter Value
Target ApplicationDC-DC Topologies
Core ProductSTBB1-APUR
Input Voltage Min Volt2.0
Input Voltage Max Volt5.5
Packing TypeNot Applicable
RoHs compliantEcopack2
Package NameCARD

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