ISL78302ARNWZ-T

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

The ISL78302ARNWZ-T is a dual-channel low-dropout (LDO) voltage regulator from the Renesas ISL78302 series, designed for automotive applications. It features two positive fixed outputs of 1.2 V and 3.3 V, each capable of delivering up to 300 mA. The device operates with an input voltage range of 2.3 V to 6.5 V and exhibits a typical power supply rejection ratio (PSRR) of 64 dB. Quiescent current is specified at 47 µA, with a maximum dropout voltage of 300 mV at full load. It is housed in a 10-DFN (3x3 mm) package and certified to AEC-Q100 standards for operation between -40°C and +105°C.

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

• Dual output configuration providing independent 1.2 V and 3.3 V rails within a single compact package.
• High power supply rejection ratio (PSRR) ensures stable performance in electrically noisy automotive environments.
• Low noise architecture suitable for sensitive analog and RF circuitry powering requirements.
• Integrated protection mechanisms including overcurrent limiting and thermal shutdown.

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

• Automotive infotainment systems requiring clean power for audio and video processing.
• Sensor interface circuits in advanced driver-assistance systems (ADAS).
• Telematics control units needing regulated supplies for communication modules.
• Instrument cluster displays powered by low-noise linear regulators.

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

Verify component authenticity through authorized Renesas distributors or certified partners. Confirm the specific suffix 'T' indicates tape-and-reel packaging if required for automated assembly. Check for recent Product Change Notifications (PCNs) regarding label updates or manufacturing site changes. Ensure compliance with RoHS directives and automotive quality standards before integration into production designs.

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

Select this component when dual isolated rails are needed from a single input source in space-constrained automotive boards. Compare quiescent current specifications against battery drain requirements for always-on systems. Evaluate thermal dissipation capabilities based on the 10-DFN package footprint and expected ambient temperatures. Consider the fixed output voltages against system rail requirements to avoid external adjustment components.

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

This part belongs to the ISL78302 family of high-performance LDOs originally developed by Intersil and now managed by Renesas Electronics. The series is characterized by its focus on low noise and high PSRR for automotive electronics. The 'ARNWZ-T' designation specifies the pinout, temperature grade, and tape-and-reel packaging format within the broader product line.

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

Publicly confirmed substitute part numbers are not explicitly listed in the provided documentation. Designers should consult Renesas technical support for qualified alternatives that match the 10-DFN footprint and electrical specifications.

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

What is the stability requirement for the output capacitors?

The device is stable with output capacitance ranging from 1 µF to 10 µF and an equivalent series resistance (ESR) of up to 200 mΩ.

Is the Power-On Reset (POR) delay adjustable?

No, the POR delay for the first output (VO1) is internally fixed.

What certification does this component hold for automotive use?

The ISL78302 series is certified to the AEC-Q100 standard for automotive-grade reliability.