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Product Detailed Parameters
- Description：IC REG BOOST ADJ 500MA 8TSSOP
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Function：Step-Up
- Output Configuration：Positive
- Topology：Boost
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：1.6V
- Voltage - Input (Max)：4.5V
- Voltage - Output (Min/Fixed)：3V
- Voltage - Output (Max)：5V
- Current - Output：500mA (Switch)
- Frequency - Switching：-
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：8-TSSOP
- Grade：-
- Qualification：-
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Overview
The FAN4855MTCX is a high-efficiency boost regulator manufactured by Fairchild Semiconductor, designed for low-voltage DC-to-DC conversion in battery-powered systems. It operates with an input voltage range of 1.6V to 4.5V and provides an adjustable output up to 5V at a maximum current of 500mA. The device integrates synchronous rectification and functions at a switching frequency of 430 kHz. It is housed in an 8-pin TSSOP package.
Feature Summary
- Integrates synchronous rectification for enhanced power conversion efficiency
- Includes shutdown functionality to minimize quiescent current consumption
- Features low battery detect capability for system protection
- Supports adjustable output voltage settings
Applications
- Digital cameras
- Cell phones
- 2-cell battery powered systems
Procurement Notes
Verify the component status as obsolete when sourcing this part. Confirm that the manufacturer has transitioned to Onsemi, as legacy Fairchild products may require cross-referencing with updated documentation or alternative suppliers. Ensure compatibility with existing design constraints before procurement.
Selection Notes
Select this component for applications requiring efficient step-up conversion from low input voltages. It is suitable for portable devices where space is limited due to its compact TSSOP-8 packaging. Consider the 500mA output limit and 430 kHz frequency when designing the external inductor and capacitor network.
Part Context
This part belongs to the FAN4855 family of boost regulators. It is specifically engineered for portable electronics requiring reliable power management from dual-cell battery sources. The device represents a solution for maintaining stable output voltages in consumer handheld devices.
Replacement Considerations
Check for direct pin-compatible substitutes within the same product family. Verify if newer revisions from Onsemi offer equivalent specifications. Ensure any replacement maintains the 8TSSOP footprint and electrical characteristics.
