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Product Detailed Parameters
- Description：IC REG BOOST 4.5V 1A 9WLCSP
- Series：TinyBoost®
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Up
- Output Configuration：Positive
- Topology：Boost
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：2.5V
- Voltage - Input (Max)：4.8V
- Voltage - Output (Min/Fixed)：4.5V
- Voltage - Output (Max)：-
- Current - Output：1A (Switch)
- Frequency - Switching：2.5MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：9-UFBGA, WLCSP
- Supplier Device Package：9-WLCSP (1.22x1.22)
- Grade：-
- Qualification：-
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Overview
The FAN48610BUC45X is a synchronous boost switching regulator IC from onsemi, designed for fixed-output applications. It operates with a maximum switching frequency of 3000 kHz and delivers an output current of 1A. The device utilizes current-mode control to regulate voltage. It is housed in a 9-UFBGA, WLCSP package (PBGA9). The regulator provides a positive fixed output voltage of 4.5V. This component is classified as a low-power boost regulator suitable for battery-powered systems.
Feature Summary
- Synchronous rectification architecture for improved efficiency
- Current-mode control for stable regulation
- Fixed-output configuration simplifying circuit design
- Compact WLCSP packaging for space-constrained applications
Applications
- Single cell Lithium or Li-Ion battery powered devices
- Portable consumer electronics requiring regulated power rails
- IoT modules needing efficient step-up conversion
- Medical handheld equipment with strict size constraints
Procurement Notes
Verify the exact suffix UC45X against the manufacturer's latest datasheet revision to confirm pinout and electrical specifications match your design requirements. Ensure the 9-UFBGA package footprint aligns with your PCB layout guidelines. Cross-reference the part number with official onsemi distributors to avoid counterfeit components. Confirm thermal performance data for your specific ambient conditions before finalizing procurement.
Selection Notes
Select this component when a fixed 4.5V output is required from a single-cell lithium source. The synchronous design offers better efficiency than non-synchronous alternatives at moderate loads. The small WLCSP package is ideal for dense PCB layouts. Consider the 3MHz switching frequency for smaller external passive component sizes compared to lower-frequency regulators. Ensure input voltage ranges match the single-cell battery profile.
Part Context
This part belongs to the TinyBoost family of synchronous regulators from onsemi. These devices are engineered for high efficiency in portable applications. The FAN48610 series typically integrates power switches and control logic into a minimal footprint. It complements other fixed-output variants within the same product line, offering consistent performance characteristics across similar package types.
Replacement Considerations
The FAN48615UC11X is listed as a related part in the same product family. Verify if the output voltage and package compatibility meet your specific design needs before substitution. Check for any differences in switching frequency or control topology between these variants.
