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Product Detailed Parameters
- Description：IC REG BUCK BOOST ADJ 2.5A 20QFN
- Series：Enpirion®
- Mfr：Altera
- Package：Tape & Reel (TR)
- Function：Step-Down, Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck, Buck-Boost
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：36V
- Voltage - Output (Min/Fixed)：0.5V
- Voltage - Output (Max)：36V
- Current - Output：2.5A
- Frequency - Switching：200kHz ~ 2.2MHz
- Synchronous Rectifier：Both
- Operating Temperature：-40°C ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-VFQFN Exposed Pad
- Supplier Device Package：20-QFN-EP (4x4)
- Grade：-
- Qualification：-
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Overview
The ER3125QI is a synchronous step-down and step-up switching regulator from the Enpirion series, manufactured by Altera. It accepts an input voltage range of 3 V to 36 V and provides a single adjustable output voltage between 0.5 V and 3.6 V. The device delivers a maximum output current of 2.5 A. Designed for surface-mount technology (SMD/SMT) installation, it operates in both buck and boost modes. The component is RoHS compliant and utilizes a QFN package.
Feature Summary
- Integrated synchronous buck-boost topology for flexible voltage conversion
- Wide input voltage capability supporting diverse power sources
- Adjustable output voltage with fixed maximum current rating
Applications
- Portable electronic devices requiring wide input ranges
- Battery-powered systems needing buck or boost regulation
- Industrial equipment with variable supply voltages
Procurement Notes
Verify the manufacturer designation carefully, as historical records may list Altera while current ownership falls under Intel Programmable Solutions Group. Confirm the specific package variant and suffix codes against official datasheets to ensure compatibility with your design requirements. Check for end-of-life status or alternative recommendations from the supplier.
Selection Notes
Select this component when a single IC must handle both step-down and step-up operations within the specified voltage windows. Ensure the load current does not exceed 2.5 A and that the PCB layout supports the thermal requirements of the QFN package. Validate that the input source remains within the 3 V to 36 V operational limits.
Part Context
This part belongs to the Enpirion family of power management ICs, which are characterized by high integration and compact form factors. While Altera is primarily known for FPGAs, this specific product line represents their power management offerings, now managed under the Intel Programmable Solutions Group umbrella following corporate acquisitions.
Replacement Considerations
Consult official distributor databases for current substitute part numbers. Verify pinout compatibility and electrical specifications before replacing legacy stock.
