XC9237B1LCMR-G

Voltage Regulators - DC DC Switching Regulators Overview

The XC9237B1LCMR-G is a synchronous step-down DC/DC converter from the XC9237 series by Torex Semiconductor. It features a built-in P-channel driver transistor and N-channel switching transistor, supporting an input voltage range of 2.0V to 6.0V. The device provides a fixed output voltage of 1.85V with a maximum output current of 600mA. It operates at a selectable switching frequency of 1.2MHz or 3.0MHz and utilizes automatic PWM/PFM switching control for high efficiency across load ranges. Quiescent current is 15µA, and it functions within a temperature range of -40°C to +85°C in a SOT-25-5 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Built-in synchronous rectification with integrated driver and switching transistors
• Automatic PWM/PFM switching control for optimized efficiency under varying loads
• Selectable internal oscillator frequencies for application flexibility
• Low quiescent current consumption during standby operations

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems needing extended operational life
• Embedded circuits utilizing ceramic output capacitors
• Consumer electronics with strict size constraints

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'G' indicates RoHS compliance and lead-free status as per manufacturer standards. Confirm the fixed output voltage variant matches the design requirement, as the XC9237 series offers multiple fixed voltage options. Ensure the SOT-25-5 package footprint aligns with the PCB layout. Check for any regional distribution restrictions or availability updates directly from authorized distributors before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact synchronous buck converter is needed for inputs up to 6V. The automatic PWM/PFM mode makes it suitable for applications with variable load currents where efficiency at light loads is critical. Compare against the XC9235 (PWM only) and XC9236 (Auto PWM/PFM) series if different control modes are preferred. Ensure the required output voltage is available in the fixed variants or consider adjustable versions if custom voltages are necessary.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the XC9237 series of 600mA synchronous step-down converters. The series is characterized by its ability to use small external components, including ceramic capacitors, due to high-frequency operation. It is designed for portable equipment where space and battery life are primary concerns. The B-type designation typically refers to specific output voltage configurations within the family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements within the same series include other XC9237 variants with different fixed output voltages or packages, such as XC9237A1LCMR-G or XC9237B1CMLR-G. Cross-series alternatives like the XC9236B1LCMR-G offer similar functionality but may differ in control mode specifications. Verify pin compatibility and thermal performance when substituting.