Renesas ISL8016IR12Z-T7A

Overview

ISL8016IR12Z-T7A from Renesas Electronics (formerly Intersil) is a 6A monolithic synchronous buck regulator with fixed 1.2V output, operating from 2.7V–5.5V input. It integrates low-R_DS(on) P- and N-channel MOSFETs, delivers up to 97% efficiency at 6A, supports adjustable frequency (500kHz–4MHz), and features reverse current protection, pre-bias start-up, and over-temperature shutdown. It powers FPGA core rails in portable instrumentation.

For engineers reviewing the ISL8016IR12Z-T7A datasheet, ISL8016IR12Z-T7A pinout, ISL8016IR12Z-T7A application, or ISL8016IR12Z-T7A equivalent, key selection criteria include its fixed 1.2V output accuracy (±1%), 100% duty-cycle capability for <200mV dropout, phase-interleaving support for >6A systems, and robust hiccup-mode short-circuit protection.

Technical Context

The ISL8016IR12Z-T7A employs peak current-mode control with slope compensation for fast transient response and loop stability. Its internal transconductance error amplifier (100 µA/V with internal compensation) regulates output via a precision 0.6V reference, achieving ±1% total output voltage accuracy over temperature, line, and load.

It supports dual operating modes: forced PWM (via SYNCIN high) for low-noise, constant-frequency operation, and PFM (via SYNCIN low) for ultra-low quiescent current (70 µA) at light loads. Current limit is configurable via ISET pin (6A default), and soft-start time is set by SS pin (1ms internal default).

Key Specifications

Pinout & Package

ISL8016IR12Z-T7A is housed in a RoHS-compliant, thermally enhanced 20-lead 3 mm × 4 mm QFN package with exposed pad (PKG DWG # L20.3x4). The exposed pad must be soldered to SGND for optimal thermal performance (θ_JA = 42°C/W, θ_JC = 5°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with TPS54620RGYT and MP2315GJ-Z, the ISL8016IR12Z-T7A uniquely combines fixed 1.2V accuracy, 70 µA PFM quiescent current, pre-bias start-up, and ±10% margining in a 3×4 mm package-making it optimal for space-constrained, battery-sensitive FPGA and instrumentation designs.

Availability

ISL8016IR12Z-T7A is available at Aetrix Electronics and suitable for FPGA core power, portable instrumentation, and Li-ion-powered embedded systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for ISL8016IR12Z-T7A 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 acquired Intersil in 2017 and maintains full technical and manufacturing continuity for the ISL8016 family. Renesas is a global semiconductor leader specializing in microcontrollers, analog, and power management ICs.

The ISL8016 product line was designed specifically for high-current, low-voltage point-of-load regulation in battery-powered and space-constrained applications-including FPGA, DSP, and µP core supplies-emphasizing efficiency, thermal performance, and ease of integration.

FAQ

What is the output voltage tolerance of the ISL8016IR12Z-T7A over temperature and load?

The ISL8016IR12Z-T7A guarantees ±1% output voltage accuracy over the full operating range of –40°C to +85°C ambient temperature, line (2.7V–5.5V VIN), and load (0–6A). This is achieved via a precision 0.6V internal reference and tight feedback resistor divider tolerance in the fixed-output variant. The measured V_VFB is 1.188–1.212 V, confirming the 1.2V nominal output meets this spec.

Does the ISL8016IR12Z-T7A support pre-bias start-up, and how is it enabled?

Yes, the ISL8016IR12Z-T7A supports start-up with a pre-biased output. This feature is inherent to its architecture and requires no external configuration-it activates automatically when the EN pin is asserted while the VOUT node is already charged. The device prevents reverse current flow using internal negative current sensing, making it safe for hot-swap and multi-rail sequencing applications.

Can the ISL8016IR12Z-T7A be synchronized to an external clock, and what is the supported frequency range?

Yes, the ISL8016IR12Z-T7A supports external synchronization via the SYNCIN pin across 500 kHz to 4 MHz. The rising edge of the external clock triggers the internal PHASE node. For reliable operation, the external clock frequency must exceed 50% of the internal oscillator frequency, and the minimum PHASE on-time must remain ≥140 ns-verified in the datasheet's synchronization waveforms and timing equations.

What is the thermal performance of the ISL8016IR12Z-T7A in its 3×4 mm QFN package?

The ISL8016IR12Z-T7A achieves θ_JA = 42°C/W and θ_JC = 5°C/W in the 20-lead 3×4 mm QFN package (L20.3x4) when the exposed pad is properly soldered to SGND with multiple thermal vias. At 6A output and 5V input, typical power dissipation is ~1.2 W, resulting in ~50°C junction rise above ambient-well within the –55°C to +125°C junction rating.

How does the ISL8016IR12Z-T7A handle short-circuit conditions?

The ISL8016IR12Z-T7A uses peak current limiting with hiccup-mode recovery. Upon detecting 17 consecutive overcurrent events (each blanked for 17 clock pulses), it shuts down and attempts auto-restart after eight soft-start delays. During hiccup, the output is discharged via soft-stop, and PG is held low-providing clear fault signaling without latch-up or manual reset requirements.