ISL78302AARLLZ

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

The ISL78302AARLLZ is a dual-channel low dropout (LDO) linear voltage regulator from the Renesas ISL78302A series, designed for automotive applications. It features two independent positive fixed outputs, each capable of sourcing 300 mA. The device operates with an input voltage range of 2.3 V to 6.5 V and provides fixed output voltages of 2.9 V on both channels. Key electrical specifications include a typical dropout voltage of 0.23 V at full load, a quiescent current of 36 µA, and a power supply rejection ratio (PSRR) of up to 90 dB. It is housed in a 10-DFN (3x3 mm) package with an exposed pad.

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

• Dual-output architecture providing independent regulation for two separate circuits within a single compact package.
• High power supply rejection ratio (PSRR) ensures effective suppression of input noise and ripple for sensitive downstream components.
• Automotive-grade reliability certified under AEC-Q100 standards for operation in harsh environmental conditions.
• Integrated protection mechanisms including overcurrent limiting and thermal shutdown to safeguard the device during fault conditions.

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

• Powering analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) in automotive infotainment systems.
• Supplying stable voltage rails for microcontrollers and sensors in engine control units (ECUs).
• Providing clean power for radio frequency (RF) modules and communication interfaces in vehicle networks.

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

Verify the specific suffix and marking code against the manufacturer's latest datasheet to confirm output voltage configurations and package type. Check for End-of-Life (EOL) notices or Production Change Notices (PCN) as availability may be limited. Ensure compatibility with RoHS3 and REACH regulations for your region. Confirm moisture sensitivity level (MSL) handling requirements during storage and assembly to prevent damage.

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

Select this component when dual isolated LDOs are required in space-constrained automotive designs. The 300 mA per channel rating suits moderate current loads, while the low quiescent current aids battery efficiency. Verify that the input voltage remains above the sum of the dropout voltage and required output voltage across all operating temperatures. Consider the 10-DFN package thermal performance and PCB copper area requirements for adequate heat dissipation.

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

The ISL78302AARLLZ belongs to the ISL78302A family of high-performance dual LDO regulators. This series is characterized by its low noise, high PSRR, and automotive qualification. It serves as a power management solution for applications requiring multiple clean voltage rails from a single source, replacing discrete regulator solutions to save board space and reduce component count.

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

Direct substitutes include other parts from the ISL78302A family with different output voltage combinations, such as ISL78302AARJRZ or ISL78302ARNWZ, provided the pinout and package dimensions remain identical. Verify functional equivalence regarding PSRR, noise specs, and thermal characteristics before substitution.