Renesas ISL9016IRUKFZ-T

Overview

ISL9016IRUKFZ-T from Intersil is a dual low-dropout linear regulator IC delivering two independent 150mA outputs with fixed voltages of 2.85V (VOUT1) and 2.5V (VOUT2), operating from 1.8V to 6.5V input. It features 80dB PSRR at 1kHz, 25µVRMS output noise, ±0.8% output voltage accuracy at +25°C, and reverse current protection - optimized for power-sensitive portable electronics requiring clean, sequenced rail generation.

For engineers reviewing the ISL9016IRUKFZ-T datasheet, ISL9016IRUKFZ-T pinout, ISL9016IRUKFZ-T application, or ISL9016IRUKFZ-T equivalent, key selection criteria include dual-rail enable control, µTDFN-6 package footprint compatibility, low-quiescent-current operation (49µA single-LDO active), and stability with 1µF–4.7µF ceramic output capacitors without external compensation.

Technical Context

The ISL9016IRUKFZ-T integrates two independent LDO regulators with separate EN1/EN2 inputs, enabling flexible power sequencing and rail shutdown. Each LDO employs internal bandgap reference, soft-start circuitry (30–60 µs/V ramp rate), and thermal foldback that disables only the overloaded channel above 145°C while preserving the other.

It delivers high AC performance via fast load transient response and maintains DC precision with ±0.8% initial accuracy and ±1.8% over –40°C to +85°C. Reverse current protection limits IORLC to <15µA when VIN = 0V and VOUT = 5.5V, preventing backfeed in battery-backed or hot-swap scenarios.

Key Specifications

Pinout & Package

ISL9016IRUKFZ-T is housed in a 1.6mm × 1.6mm, 6-lead µTDFN (Ultra Thin Dual Flat No-Lead) package with exposed thermal pad (e-pad). The package is RoHS-compliant, Pb-free, and rated MSL-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL9016IRUKFZ-T, TPS7A20285PDBVR lacks dual-rail integration and independent enable control, increasing system-level component count and PCB area; no alternative matches its combination of dual fixed outputs, 49µA IQ, and µTDFN-6 footprint in a single device.

Availability

ISL9016IRUKFZ-T is available at Aetrix Electronics and suitable for portable medical devices, smartphone subsystems, and industrial handheld data loggers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for ISL9016IRUKFZ-T 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

Intersil Corporation (now part of Renesas Electronics) designs high-performance analog semiconductors for power management and signal conditioning in portable, industrial, and communications markets.

The ISL9016 product line targets space-constrained, battery-operated applications demanding ultra-low quiescent current, high PSRR, and dual-rail flexibility - specifically engineered for smartphones, PDAs, and portable instrumentation.

FAQ

What are the fixed output voltages of the ISL9016IRUKFZ-T?

The ISL9016IRUKFZ-T provides factory-set output voltages of 2.85V on VOUT1 and 2.5V on VOUT2. These values are trimmed during production and require no external feedback resistors. Both outputs deliver up to 150mA continuously and maintain ±0.8% accuracy at +25°C, making ISL9016IRUKFZ-T ideal for applications needing precise, low-noise dual-rail generation without design overhead.

Does the ISL9016IRUKFZ-T support independent enable control for each LDO?

Yes, the ISL9016IRUKFZ-T features two dedicated enable pins: EN1 controls VOUT1 (2.85V) and EN2 controls VOUT2 (2.5V), both active-high. Each pin requires a 100kΩ pull-up resistor to a valid logic rail and must not be left floating. This architecture enables flexible power sequencing - for example, bringing up the 2.85V rail before the 2.5V rail - and allows dynamic shutdown of either output to reduce system-level quiescent current, a key advantage of ISL9016IRUKFZ-T in battery-powered designs.

What is the minimum output capacitance required for stability with the ISL9016IRUKFZ-T?

The ISL9016IRUKFZ-T is stable with ceramic output capacitors ranging from 1µF to 4.7µF, using X5R or X7R dielectrics with ESR up to 200mΩ. A 1µF capacitor is recommended per output. Unlike many LDOs, ISL9016IRUKFZ-T does not require an external compensation network or specific ESR tuning, simplifying layout and reducing BOM cost. The input capacitor should also be 1µF ceramic, placed close to the VIN and GND pins to ensure robust transient response and noise rejection.

How does the ISL9016IRUKFZ-T protect against reverse current flow?

The ISL9016IRUKFZ-T integrates reverse current protection that limits IORLC to less than 15µA when VIN is grounded and VOUT is held at 5.5V. This feature prevents backfeed from output to input during conditions such as battery hot-swap, system sleep with retained output voltage, or input disconnection - protecting upstream power sources and improving overall system reliability. This behavior is inherent to ISL9016IRUKFZ-T's internal architecture and requires no external components.

What thermal protection mechanism does the ISL9016IRUKFZ-T implement?

The ISL9016IRUKFZ-T includes thermal shutdown that activates at approximately +145°C junction temperature and recovers at ~+110°C. Crucially, it implements channel-level thermal foldback: only the LDO sourcing more than 50mA is disabled during overtemperature events, allowing the other rail to remain operational. This preserves partial system functionality - for example, maintaining MCU operation while disabling a high-load peripheral rail - a distinctive reliability feature of ISL9016IRUKFZ-T not found in most dual-LDO competitors.