ISL78302AR1AZ-T7A

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

The ISL78302AR1AZ-T7A is a high-performance dual low-dropout (LDO) linear voltage regulator manufactured by Renesas Electronics. It provides two independent positive fixed output voltages of 1.2 V and 1.8 V, each capable of sourcing up to 300 mA. The device features a typical quiescent current of 47 µA and a dropout voltage of 300 mV at full load. It offers a typical power supply rejection ratio (PSRR) of 64 dB and maintains a load regulation of 0.1%. Operating within an extended temperature range from -40°C to +105°C, it is housed in a compact 10-lead DFN (3x3 mm) package.

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

• Dual-output architecture delivering independent regulated rails with individual 300 mA sourcing capability
• High power supply rejection ratio ensuring effective noise attenuation across frequency ranges
• Low standby current consumption optimized for battery-powered and energy-efficient systems
• Integrated protection mechanisms including overcurrent limiting and thermal shutdown

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

• Automotive electronic control units requiring stable dual-voltage power supplies
• Infotainment systems needing low-noise regulation for sensitive analog circuits
• Sensor interfaces demanding precise fixed voltage references
• Body control modules utilizing automotive-grade power management components

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

Verify the specific suffix AR1AZ confirms the 1.2 V/1.8 V output configuration, as other variants exist within the ISL78302 family. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Check for end-of-life notifications or alternative part recommendations from Renesas due to potential obsolescence in this product line. Ensure the 10-DFN package footprint matches your PCB design constraints.

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

Select this component when dual isolated rails are required from a single input source without complex external feedback networks. The fixed 1.2 V and 1.8 V outputs suit digital logic and memory interfaces directly. Consider the 300 mA per channel limit against peak load demands. The automotive qualification and wide operating temperature range make it suitable for harsh environments where standard commercial LDOs may fail.

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

This device belongs to the ISL78302 series of dual LDO regulators designed for automotive and industrial applications. It complements other Renesas PMIC solutions by providing simple, high-reliability linear regulation. The series emphasizes low noise and high PSRR, addressing the needs of RF and audio circuits in modern vehicles. It serves as a robust alternative to discrete transistor-based regulation schemes.

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

Publicly confirmed substitute part numbers include ISL78302ARCWZ-T7A and ISL78302ARBNZ. Verify that these alternatives match the required output voltages and package type before substitution. Cross-reference pinouts and electrical characteristics to ensure compatibility with existing designs.