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

STEVAL-ISA063V2

Overview

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-R_DSonN-channel and P-channel MOSFET switches contribute to its high efficiency.

Main 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:
RoHS compliant

Design Files

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Update:2025-06-02 15:11:07

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