BU1CJA2DG-CTR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The BU1CJA2DG-CTR is a fixed-output CMOS LDO regulator manufactured by ROHM Semiconductor, designed for automotive applications. It provides a fixed output voltage of 1.25V with a maximum output current of 200mA. The device features a typical power supply rejection ratio (PSRR) of 68dB and a dropout voltage of 160mV. It operates within an input voltage range of 1.7V to 6V and supports a junction temperature range from -40°C to +125°C. The component is AEC-Q100 qualified and housed in an SSOP-5 package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• CMOS architecture ensures low circuit current consumption of 33µA.
• High ripple rejection capability of 68dB for noise-sensitive circuits.
• Integrated protection functions including thermal shutdown and over-current protection.
• Supports functional safety analysis as an FS supportive product.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Automotive camera systems
• Automotive radar sensors
• General automotive electronic control units

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'CTR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 1.25V fixed output aligns precisely with the target rail requirements, as alternative voltages exist within the same series. Ensure the SSOP-5 footprint matches the design layout constraints before finalizing procurement orders.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a stable 1.25V rail is required for automotive-grade environments with strict noise immunity needs. The high PSRR makes it suitable for powering sensitive analog front-ends. Consider the 200mA current limit against peak load demands. The AEC-Q100 qualification ensures reliability under automotive thermal and vibration stress conditions compared to commercial grade alternatives.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the BUxxJA2DG-C series of low-dropout regulators optimized for automotive use. The series shares common packaging and protection features but varies in output voltage and current ratings. The BU1CJA2DG-CTR specifically targets low-voltage logic or sensor biasing applications requiring high accuracy and low quiescent current in compact surface-mount packages.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include other parts from the BUxxJA2DG-C family with matching pinouts and similar electrical characteristics. Verify that any replacement maintains the AEC-Q100 qualification and SSOP-5 package dimensions to ensure mechanical compatibility without redesigning the PCB footprint.