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Product Detailed Parameters
- Description：IC REG BOOST 3.3V 650MA 6WLCSP
- 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)：2.3V
- Voltage - Input (Max)：3.2V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：650mA (Switch)
- Frequency - Switching：3MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：6-UFBGA, WLCSP
- Supplier Device Package：6-WLCSP (1.23x0.88)
- Grade：-
- Qualification：-
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Overview
The FAN4860UC33X is a synchronous boost regulator from onsemi's TinyBoost series, designed for single-cell lithium or Li-ion battery applications. It provides a fixed regulated output of 3.3 V with a maximum switch current of 650 mA. The device operates within an input voltage range of 2.3 V to 4.5 V and features a switching frequency of 3 MHz. It includes shutdown functionality and operates across a temperature range of -40°C to +85°C. Packaged in a compact 6-pin WLCSP (1.23x0.88 mm) format, it supports surface-mount installation.
Feature Summary
- Synchronous rectification architecture for improved efficiency
- Fixed 3.3 V output optimized for single-cell battery systems
- Compact 6-pin WLCSP package for space-constrained designs
Applications
- Single-cell Lithium battery powered portable devices
- Li-ion battery backup power supplies
- Low-power consumer electronics requiring stable 3.3 V rail
Procurement Notes
Verify component authenticity through authorized channels due to potential counterfeit risks. Confirm RoHS compliance status via official manufacturer declarations. Check for End-of-Life (EOL) notices or Product Change Notifications (PCN) as availability may be restricted. Ensure packaging specifications match design requirements for the 6-WLCSP form factor.
Selection Notes
Select this model when a fixed 3.3 V output is required from a single-cell source. The 650 mA output current limits suitability for high-power loads; consider higher-current variants like the FAN48630 if load demands exceed this threshold. The 3 MHz frequency allows for smaller external passive components compared to lower-frequency alternatives.
Part Context
Part of the TinyBoost family, the FAN4860 series offers low-power synchronous boost regulation. The UC33X suffix denotes the specific 3.3 V fixed output variant within the 6-pin WLCSP package. It complements other models like the FAN48630, which offers higher current capacity but in a larger 16-pin package.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult onsemi directly for qualified replacements or pin-compatible alternatives.
