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Product Detailed Parameters
- Description：IC REG BUCK BST 3.3V 2A 20WLCSP
- Series：TinyPower™
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck-Boost
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：2.5V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：2A
- Frequency - Switching：1.8MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-UFBGA, WLCSP
- Supplier Device Package：20-WLCSP (1.96x1.56)
- Grade：-
- Qualification：-
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Overview
The FAN49100AUC330X is a synchronous buck-boost switching regulator IC from the TinyPower series by ON Semiconductor. It operates with an input voltage range of 2.5V to 5.5V and provides a fixed output voltage of 3.3V. The device delivers up to 2.5A of output current at a switching frequency of 1.8MHz. It features a positive output configuration and is housed in a 20-UFBGA, WLCSP package. The component supports operation across a temperature range of -40°C to 85°C.
Feature Summary
- Synchronous rectification for improved efficiency
- Buck-boost topology supporting wide input voltage ranges
- Fixed 3.3V output configuration
Applications
- Battery-powered portable devices
- Embedded systems requiring stable power from varying battery levels
- Industrial control modules
Procurement Notes
Verify the manufacturer designation carefully, as ON Semiconductor acquired Fairchild Semiconductor. Ensure the part number matches the specific suffix for the 3.3V fixed output variant. Confirm the package type is 20-WLCSP. Check for RoHS compliance status if required by your assembly process. Validate the operating temperature range against your environmental specifications.
Selection Notes
Select this component when a single-stage solution is needed for applications where the input voltage may rise above or fall below the required output level. The 1.8MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Ensure the load current does not exceed the 2.5A limit. Consider thermal performance within the 20-WLCSP package for high-current scenarios.
Part Context
This device belongs to the TinyPower series, designed for space-constrained applications. It integrates high-side and low-side switches into a compact WLCSP footprint. The synchronous design reduces power loss compared to asynchronous regulators. It is intended for use in systems requiring efficient power management from single-cell lithium-ion batteries or other variable DC sources.
Replacement Considerations
Check for direct pin-compatible substitutes within the same TinyPower family, such as variants with different fixed output voltages (e.g., 2.8V or 4.0V). Verify that any replacement maintains the 1.8MHz switching frequency and 2.5A current capability. Ensure the alternative part uses the same 20-WLCSP package to fit existing footprints.
