STEVAL-ISA063V2 STMicroelectronics

STEVAL-ISA063V2 1 A, high efficiency single inductor DC-DC converter based on the STBB1-APUR Data brief 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 A STEVAL-ISA063V2 RoHS compliant Description 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 N-channel and P- DSon channel MOSFET switches contribute to its high efficiency. December 2011 Doc ID 022622 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4Schematic diagram STEVAL-ISA063V2 1 Schematic diagram Figure 1. STEVAL-ISA063V2 circuit schematic - /54 . 6 /54 /54 . 6 -/ % 39. ). 6 . /54 6 . 37 0 . 34 37 ). ). 6 6 %. -/ % 39. %. 5 ). 6 . % -/ % 39. ). 6 . ). 6 . 2/4 Doc ID 022622 Rev 1