ISL78302AARLLZ-T

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

The ISL78302AARLLZ-T is an automotive-grade dual low-dropout (LDO) voltage regulator from the Renesas ISL78302A series. It provides two independent positive fixed outputs, typically configured for 2.9V each, with a maximum output current of 300mA per channel. The device operates within an input voltage range of 2.3V to 6.5V and maintains a typical quiescent current of 47µA when active. It features very high power supply rejection ratio (PSRR) of 90dB at 1kHz and low output noise. The component is housed in a 10-DFN (3x3mm) package with exposed pad, rated for operation between -40°C and +105°C, and complies with AEC-Q100 standards.

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

• Integrates two high-performance LDOs capable of sourcing 300mA each with excellent transient response.
• Provides individually controllable outputs via separate Enable pins and integrated Power-On-Reset (POR) functions.
• Features extremely low quiescent current consumption and high PSRR suitable for noise-sensitive applications.
• Includes a reference bypass pin for external noise filtering to enhance performance in critical circuits.

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

• Automotive electronic control units requiring stable dual voltage rails
• Sensor interfaces demanding low noise and high PSRR
• Actuator driver circuits in vehicle body electronics
• Infotainment systems needing regulated power supplies

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

Verify the specific suffix configuration against official datasheets, as packaging options vary between tape-and-reel and tube formats. Confirm availability status directly with Renesas or authorized distributors, as lead times may fluctuate due to automotive demand. Ensure the selected variant matches the required output voltage combination and thermal requirements for the target application environment.

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

Select this component when dual isolated LDO outputs are required in a compact automotive footprint. Consider the 300mA current limit per channel and the 2.3V minimum input voltage constraint. Evaluate the need for external POR timing capacitors if precise reset sequencing is necessary. Verify compatibility with the system's ground plane design for optimal thermal dissipation in the DFN package.

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

The ISL78302A series represents Renesas' solution for high-reliability automotive power management. Designed under AEC-Q100 guidelines, it addresses the need for clean, stable power in modern vehicles. The dual-output architecture reduces board space compared to using single LDOs, supporting trends toward miniaturization in E/E architectures while maintaining robust performance across wide temperature ranges.

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

Check for direct substitutes within the ISL78302 family with different output voltage combinations or packaging styles. Verify pin-to-pin compatibility before replacing existing designs. Consult Renesas documentation for any updated revisions or end-of-life notices affecting long-term supply chain stability.