XC9237B37C4R-G

Voltage Regulators - DC DC Switching Regulators Overview

The XC9237B37C4R-G is a synchronous step-down DC/DC converter from the Torex XC9237 series. It features a built-in P-channel MOS driver transistor and N-channel MOS switching transistor, supporting an input voltage range of 2.0V to 6.0V. The device delivers a maximum output current of 600mA with a fixed output voltage of 3.7V. It operates at a selectable switching frequency of either 1.2MHz or 3.0MHz. The controller utilizes current-mode control with pulse width modulation (PWM). It is housed in a compact 6-pin USPEL package measuring 1.8mm by 2.0mm.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification topology with integrated power transistors for high efficiency
• Manual switchable between PWM and automatic PWM/PFM modes for load optimization
• Built-in UVLO function to force driver transistor OFF during low input conditions
• Optimized soft-start and current control circuits for stable operation

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring efficient buck conversion
• Battery-powered systems operating within 2.0V to 6.0V input ranges
• Applications necessitating low ripple and fast transient response
• Space-constrained designs utilizing small footprint packages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm the fixed output voltage and switching frequency selection. Ensure the ordering part number matches the required package type and temperature rating. Cross-reference the manufacturer's latest documentation for any revisions to pinout or electrical characteristics before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.7V output is required from a 2V to 6V source. The manual mode switching allows designers to prioritize efficiency at light loads via PFM or minimize ripple via PWM under heavy loads. Consider the 600mA current limit and the specific thermal requirements of the USPEL package for the target application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the XC9235/XC9236/XC9237 series of synchronous step-down converters. The XC9237 variant specifically distinguishes itself by allowing manual selection between PWM and PWM/PFM modes, unlike the XC9235 which is fixed PWM or the XC9236 which auto-switches. This flexibility supports diverse performance needs across varying load conditions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same series include other XC9237 variants with different fixed output voltages or frequencies, such as XC9237A or XC9237G types. Verify that alternative parts maintain the same 600mA output capability and compatible package dimensions for board-level compatibility.