XC9237B38DER-G

Voltage Regulators - DC DC Switching Regulators Overview

The XC9237B38DER-G is a synchronous-rectification step-down DC/DC converter from Torex Semiconductor Ltd. 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 with a maximum output current of 0.6A. The device operates at a selectable switching frequency of either 1.2MHz or 3.0MHz and utilizes current-mode control with pulse width modulation. It provides a fixed output voltage of 3.8V with ±2.0% accuracy. The IC includes soft-start and current-limiting functions, achieving low standby current consumption of 1.0μA when disabled.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Built-in synchronous rectification using integrated P-channel and N-channel transistors for high efficiency
• Selectable switching frequencies of 1.2MHz or 3.0MHz to optimize component size and performance
• Automatic PWM/PFM switching control mode ensures high efficiency across light to heavy load conditions
• Integrated soft-start and current control functions provide stable startup and protection

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring efficient power management
• Battery-powered equipment utilizing ceramic capacitors
• Systems needing compact DC/DC conversion solutions
• Applications requiring low standby current consumption

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'G' indicates RoHS compliance and REACH status as per manufacturer documentation. Confirm the package type matches the required PCB layout, specifically the 6-pin configuration. Ensure the fixed 3.8V output aligns with system voltage requirements. Check thermal dissipation capabilities within the operating temperature range of -40°C to 85°C. Validate that external components meet the specifications for the selected switching frequency.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model for applications requiring a fixed 3.8V output from a 2V to 6V input source. Choose based on the need for manual switching between PWM and PWM/PFM modes via the MODE pin. Consider the 0.6A output capability for moderate load requirements. Evaluate the trade-off between component size and efficiency at 1.2MHz versus 3.0MHz. Ensure compatibility with ceramic output capacitors due to the built-in driver transistor characteristics.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the XC9235/XC9236/XC9237 series of 600mA synchronous step-down converters. The XC9237 variant specifically allows manual selection of the operation mode. It shares architectural similarities with the XC9235 (PWM only) and XC9236 (auto PWM/PFM) but offers flexibility through the MODE pin. The series is designed for use with ceramic capacitors, reducing external component count.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include other models within the XC9235, XC9236, and XC9237 series that match the input/output voltage ranges and package type. Verify if alternative part numbers offer different fixed output voltages or switching frequencies suitable for the design. Cross-reference pinouts and electrical characteristics to ensure functional equivalence.