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Product attributes Property Value
Manufacturer Torex Semiconductor Ltd
Product Series XC9140
Packaging Tape & Reel (TR) |
Function Step-Up
Output Configuration Positive
Topology Boost
Output Type Fixed
Number of Outputs 1
Voltage - Input (Min) 0.9V
Voltage - Input (Max) 5.5V
Voltage - Output (Min/Fixed) 4.2V
Voltage - Output (Max) -
Current - Output 100mA
Frequency - Switching -
Synchronous Rectifier Yes
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-25
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Torex XC9140C422MR-G is a synchronous Boost DC-DC converter that provides a fixed 4.2V output from an input voltage between 0.9V and 5.5V. With a maximum output current of 100mA, it is designed for low-power, battery-operated applications. The converter is available in a compact SC-74A/SOT-753 package, making it easy to integrate into space-constrained designs. Its high-efficiency synchronous operation helps to maximize battery life, making it an excellent choice for portable electronics, charging circuits, and other applications requiring a stable 4.2V supply.

  • Optimal for Li-Ion Charging: The 4.2V output aligns with the standard full-charge voltage for single-cell Li-ion batteries.
  • Low Input Voltage Operation: Can start from as low as 0.9V, allowing use with nearly depleted batteries.
  • Efficient Power Conversion: Synchronous rectification reduces heat and improves efficiency, especially in battery-powered designs.
  • Easy Integration: The small SC-74A/SOT-753 package simplifies PCB layout and reduces overall solution size.

Li-Ion Battery Charging

The 4.2V output is perfectly matched to the full-charge voltage of a single-cell Li-ion battery, making this converter ideal for portable solar chargers or battery management systems that need to boost a lower voltage to charge the battery.

USB Power Delivery (Legacy)

For legacy USB devices requiring 4.2V, this converter can step up from a lower battery voltage to provide a stable power source, ensuring compatibility with older peripherals.

Portable Instrumentation

Precision instruments like digital calipers or thermocouple readers often need a stable 4.2V rail for their analog front-ends. This boost converter ensures accurate readings by providing a clean, regulated supply.

RF Transmitters

Short-range RF transmitters and beacons require a stable voltage for consistent output power. The XC9140C422MR-G boosts battery voltage to 4.2V, ensuring reliable signal transmission.

Backup Power Systems

In systems with a backup battery, this converter can maintain a 4.2V rail for critical circuits, ensuring seamless operation during main power loss.

Q: What type of converter is the XC9140C422MR-G?
A: It is a synchronous Boost (step-up) DC-DC converter IC.
Q: What is the input voltage range?
A: The input voltage range is from 0.9V to 5.5V.
Q: What is the output voltage?
A: The fixed output voltage is 4.2V.
Q: What is the maximum output current?
A: The maximum output current is 100mA.
Q: What is the switching frequency?
A: The switching frequency is not specified in the provided data.
Q: What package is available?
A: It is available in SC-74A and SOT-753 packages.
Base Product Number : XC9140C422MR
0.9V-5.5V 100mA 4.2V Output Boost DC-DC Converter Li-Ion Charging Portable SC-74A SOT-753 Step-Up Torex
Q: What type of converter is the XC9140C422MR-G?
A: It is a synchronous Boost (step-up) DC-DC converter IC.
Q: What is the input voltage range?
A: The input voltage range is from 0.9V to 5.5V.
Q: What is the output voltage?
A: The fixed output voltage is 4.2V.
Q: What is the maximum output current?
A: The maximum output current is 100mA.
Q: What is the switching frequency?
A: The switching frequency is not specified in the provided data.
Q: What package is available?
A: It is available in SC-74A and SOT-753 packages.