Renesas ISL78302AARGCZ

Overview

ISL78302AARGCZ from Renesas Electronics (formerly Intersil) is a dual low-dropout linear regulator IC designed for automotive power management, delivering 300mA per channel with 2.7V and 1.8V fixed outputs, ±1.8% regulation accuracy over -40°C to +105°C, 90dB PSRR at 1kHz, and 47µA quiescent current with both LDOs active - used in camera modules and infotainment systems requiring ultra-low noise and high PSRR.

For engineers reviewing the ISL78302AARGCZ datasheet, ISL78302AARGCZ pinout, ISL78302AARGCZ application, or ISL78302AARGCZ equivalent, key selection considerations include dual independent enable/POR control, 1µF–10µF ceramic capacitor stability, AEC-Q100 qualification, and programmable POR2 delay via CPOR pin for synchronized system reset sequencing.

Technical Context

The ISL78302AARGCZ integrates two independent PMOS-based LDO regulators with trimmed 1V internal references and resistor dividers to achieve precise 2.7V and 1.8V outputs. Each LDO features dedicated error amplifiers, soft-start (30µs/V ramp rate), staged turn-on priority (VO1 first), and adaptive biasing for low IQ.

Its POR architecture uses open-drain outputs (POR1 fixed ~2ms delay, POR2 externally programmable via CPOR capacitor), UVLO detection (2.1V turn-on, 1.8V shutdown), and thermal protection (145°C trip, 110°C recovery) with selective LDO shutdown based on load current - all implemented within a single 3mm×3mm DFN package rated for automotive temperature range.

Key Specifications

Pinout & Package

Tiny 10-lead 3mm×3mm DFN package (RoHS-compliant, exposed thermal pad) with wettable flank leads for automated optical inspection. Pin 1 marked by index area on top surface; thermal pad soldered to PCB ground plane for optimal heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-LDO automotive power management applications.

Compared with TPS7B8753QKVURQ1 and NCP1117ST28T3G, the ISL78302AARGCZ uniquely delivers integrated dual-rail regulation with automotive-grade reliability, programmable reset timing, and ultra-low noise - eliminating discrete solutions while reducing PCB area and BOM count in safety-critical domains.

Availability

ISL78302AARGCZ is available at Aetrix Electronics and suitable for automotive camera modules, infotainment systems, and GPS navigation units requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.

Supply support for ISL78302AARGCZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global leader in microcontrollers, analog, power management, and SoC solutions, formed through the merger of Renesas Technology and NEC Electronics.

The ISL78302AARGCZ belongs to Renesas' automotive-qualified power management portfolio, engineered specifically for noise-sensitive ADAS and infotainment subsystems demanding high PSRR, low IQ, and robust thermal protection in harsh environments.

FAQ

What are the fixed output voltages of the ISL78302AARGCZ?

The ISL78302AARGCZ provides factory-trimmed fixed outputs of 2.7V on VO1 and 1.8V on VO2. These values are specified in the Ordering Information table of the FN7932 datasheet and cannot be adjusted externally. The 2.7V/1.8V combination targets common automotive sensor and processor I/O voltage requirements, and the ISL78302AARGCZ maintains ±1.8% accuracy across -40°C to +105°C ambient temperature.

How does the POR2 delay work on the ISL78302AARGCZ?

The ISL78302AARGCZ implements programmable POR2 delay via the CPOR pin: connecting a capacitor between CPOR and GND sets the delay time (e.g., 0.01µF = 200ms). This delay governs how long POR2 remains asserted low after VO2 reaches 94% of its nominal voltage. POR1 delay is fixed at ~2ms. The ISL78302AARGCZ uses this feature to enforce safe power sequencing - for example, holding off a processor's 1.8V domain until its 2.7V analog supply is fully stabilized.

What output capacitors are required for stability with the ISL78302AARGCZ?

The ISL78302AARGCZ is stable with ceramic output capacitors ranging from 1µF to 10µF, provided their ESR is ≤ 200mΩ and tolerance is better than ±20%. A 1µF X5R/X7R capacitor is recommended per output (VO1 and VO2) for optimal transient response and minimal board area. The ISL78302AARGCZ does not require series resistance or specialized capacitor types - enabling low-cost, high-reliability designs.

Is the ISL78302AARGCZ qualified for automotive applications?

Yes, the ISL78302AARGCZ is AEC-Q100 qualified (Grade 2) and rated for operation from -40°C to +105°C ambient temperature. It is manufactured under TS16949 quality systems and includes automotive-specific protections: UVLO (2.1V turn-on), thermal shutdown (145°C trip), current limiting (475mA), and robust ESD ratings (3000V HBM). These features make the ISL78302AARGCZ suitable for under-hood and cabin applications including camera modules and infotainment systems.

What is the quiescent current of the ISL78302AARGCZ in active and shutdown modes?

The ISL78302AARGCZ draws 47µA typical quiescent current when both LDOs are enabled and active, and less than 0.3µA typical in shutdown mode (both EN1 and EN2 low). These values are measured across the full -40°C to +105°C temperature range and are critical for meeting automotive ISO 16750-2 quiescent current limits. The ISL78302AARGCZ achieves ultra-low IQ through adaptive biasing that dynamically adjusts internal circuit currents based on load conditions.