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Renesas ISL8016IR18Z-T
- Part No.:
- ISL8016IR18Z-T
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IR18Z-T.pdf
- Description:
- IC REG BUCK 1.8V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,072
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Product details
Overview
ISL8016IR18Z-T from Renesas Electronics (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 6A continuous output current at a fixed 1.8V output, operating from 2.7V–5.5V input. It integrates low-RDS(on) P- and N-channel MOSFETs, supports adjustable switching frequency (500kHz–4MHz), and features pre-bias start-up, reverse current protection, and overtemperature shutdown - deployed in FPGA core power supplies requiring tight regulation and fast transient response.
For engineers reviewing the ISL8016IR18Z-T datasheet, ISL8016IR18Z-T pinout, ISL8016IR18Z-T application, or ISL8016IR18Z-T equivalent, key selection considerations include its 1.8V fixed output accuracy (±1%), 100% duty-cycle capability for <200mV dropout at 6A, phase-interleaving support for >6A configurations, and robust protection suite including hiccup-mode short-circuit response.
Technical Context
The ISL8016IR18Z-T employs peak current-mode control with slope compensation for loop stability and fast load transient response. Its internal transconductance error amplifier (100 µA/V with internal compensation) regulates against a 0.6V reference, achieving ±1% output voltage accuracy over temperature, line, and load.
It supports dual operating modes: forced PWM (via SYNCIN high) for low-noise, predictable EMI; and PFM (via SYNCIN low) for ultra-low quiescent current (70 µA typical at no load). Frequency is set either by FS-to-VIN (default 1 MHz) or via external resistor (500 kHz–4 MHz), enabling optimization for size, efficiency, or noise constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% (VOUT = 1.782–1.818V at TA = –40°C to +85°C), enabling direct core supply for 1.8V I/O or logic domains without external feedback divider. |
| Max Output Current | 6A continuous, supported by integrated 31 mΩ (P-FET) / 19 mΩ (N-FET) MOSFETs at VIN = 5V, minimizing conduction loss and thermal stress. |
| Input Voltage Range | 2.7V to 5.5V DC, compatible with single-cell Li-ion (3.0–4.2V), 3.3V rail, or 5V system inputs - no external LDO required. |
| Quiescent Current | 70 µA in PFM mode at no load, extending battery runtime in portable instruments and always-on subsystems. |
| Switching Frequency | Adjustable 500 kHz–4 MHz (default 1 MHz); higher frequencies reduce inductor/capacitor size; lower frequencies improve light-load efficiency. |
| Protection Features | Peak current limiting (7.7–11.5A depending on ISET), hiccup-mode short-circuit recovery, thermal shutdown (150°C), reverse current blocking, and pre-bias start-up. |
| Efficiency | Up to 97% at 6A/1.8V/5VIN, reducing power dissipation and simplifying thermal design in space-constrained POL modules. |
Pinout & Package
ISL8016IR18Z-T is housed in a thermally enhanced 20-lead 3 mm × 4 mm QFN package with exposed pad (PKG DWG # L20.3x4), optimized for PCB heat sinking via multiple vias to SGND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19, 20 | PGND | Power ground return for high-current switching paths; must be connected to low-impedance ground plane to minimize noise and voltage bounce. |
| 2, 3, 4 | PHASE | Switch node connecting internal high-side and low-side MOSFETs to external inductor; requires short, low-inductance routing to limit ringing and EMI. |
| 5, 6, 7 | VIN | Main input supply (2.7–5.5V); requires two 22 µF ceramic capacitors placed close to pins for high-frequency decoupling and ripple suppression. |
| 8 | PG | Open-drain power-good signal; asserts after 1 ms delay when VOUT reaches regulation (±10% window), used for system sequencing and fault monitoring. |
| 10 | SYNCIN | Mode selection and synchronization input: logic high = PWM, logic low = PFM, external clock = sync master/slave operation up to 4 MHz. |
| 11 | EN | Active-high enable with internal 1 MΩ pull-down; drives low to shut down IC and discharge output capacitor via soft-stop circuitry. |
| 12 | FS | Frequency setting: tied to VIN for 1 MHz internal compensation; resistor to SGND adjusts frequency from 500 kHz to 4 MHz. |
| 14 | ISET | Peak current limit configuration: floating = 6A, VIN = 4A, SGND = 2A - sets OCP threshold and SKIP current limit simultaneously. |
| 15 | SS | Soft-start timing control: grounded = 1 ms internal ramp; capacitor to SGND extends ramp time for controlled inrush current management. |
| 16, 17 | COMP / VFB | VFB is feedback input referenced to 0.6V bandgap; COMP is error amplifier output - tied to SGND when using internal compensation (FS = VIN). |
| 18 | SGND | Signal ground reference for analog circuits (error amp, comparators); must be isolated from PGND at single point to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty-Cycle Operation | Enables <200 mV dropout at 6A output, supporting applications where VIN may dip close to VOUT (e.g., battery brownout conditions). |
| Pre-Biased Output Start-Up | Allows safe startup into an already charged output rail - critical for hot-swap and multi-rail systems where sequencing must avoid backfeeding. |
| Phase Interleaving Support | SYNCOUT/SYNCIN interface enables precise master-slave timing alignment for paralleled ISL8016 units, reducing input/output ripple and enabling >6A solutions. |
| ±10% Output Voltage Margining | VSET pin allows dynamic adjustment of output by ±10% (via VIN/SGND tie) for system-level margin testing without hardware change. |
| Internal Soft-Start (1 ms) | Guarantees controlled output ramp with no external components, preventing inrush current damage to downstream loads and input capacitors. |
| Reverse Current Protection | Blocks current flow from output to input during shutdown or fault, protecting upstream sources and avoiding unintended power path activation. |
Applications
| FPGA Core Power Supply | Li-ion Powered Portable Instrument |
|---|---|
|
Use Scenario: Powers 1.8V I/O banks and auxiliary logic in Xilinx Artix-7 or Intel Cyclone V FPGAs within handheld test equipment. IC Role / Device Role / Timing Role: Primary point-of-load (POL) regulator delivering stable 1.8V at up to 6A with sub-2% total output deviation across load, line, and temperature. Use Value: Eliminates need for external feedback resistors and compensation network; 97% peak efficiency reduces thermal load in sealed enclosures. |
Use Scenario: Supplies main system rail in battery-operated oscilloscope front-end modules with strict standby current budget. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating in PFM mode during sleep, transitioning to PWM under active measurement load. Use Value: 70 µA quiescent current extends battery life; pre-bias start-up ensures reliable wake-up from deep sleep without rail collapse. |
| DC/DC POL Module for Network Router | Industrial Embedded Controller Power |
|
Use Scenario: Integrated into compact 12A dual-phase POL module for 1.8V switch fabric ASICs in enterprise-grade routers. IC Role / Device Role / Timing Role: One of two synchronized ISL8016IR18Z-T units operating in interleaved 180° phase offset to halve input ripple current. Use Value: Phase interleaving reduces required input capacitance by ~50%, shrinking board area while meeting CISPR-32 conducted EMI limits. |
Use Scenario: Powers ARM Cortex-M7 microcontroller and associated peripherals in DIN-rail mounted PLC I/O modules. IC Role / Device Role / Timing Role: Robust primary regulator with overtemperature, overcurrent, and UVLO protection - certified for industrial ambient (–40°C to +85°C). Use Value: Hiccup-mode short-circuit protection prevents latch-up during field wiring faults; 100% duty-cycle maintains regulation during 24V supply dips to 1.9V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RGYT | 6A, 1.8V fixed output; 2.95–17V input; 500kHz–3.5MHz sync range; no pre-bias start; higher RDS(on) (42/22 mΩ). | Requires external feedback for non-standard voltages; lacks reverse current blocking and margining pins. | Preferred for wide-input industrial rails (>5.5V); less suitable for Li-ion or pre-biased systems. |
| MP2315DJ-LF-Z | 6A, 1.8V fixed output; 4.5–28V input; 350kHz–2.5MHz; no SYNCIN/PG; only basic OCP/OTP; no PFM mode. | No PFM, no soft-stop discharge, no margining - minimal feature set for cost-sensitive designs. | Appropriate for fixed 12V/24V input systems where ultra-low IQ and advanced sequencing are unnecessary. |
Compared with TPS54620RGYT and MP2315DJ-LF-Z, the ISL8016IR18Z-T delivers superior light-load efficiency via PFM mode, guaranteed pre-bias start-up, and integrated margining - making it optimal for portable, sequenced, and battery-critical applications despite its narrower 2.7–5.5V input range.
Availability
ISL8016IR18Z-T is available at Aetrix Electronics and suitable for FPGA power delivery, Li-ion portable instrumentation, and industrial embedded controller applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8016IR18Z-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
Renesas Electronics acquired Intersil in 2017 and continues to support its high-performance analog and power management portfolio, emphasizing reliability, automotive qualification, and industrial longevity.
The ISL8016 belongs to Renesas' high-efficiency synchronous buck regulator product line, designed specifically for demanding point-of-load applications in portable, networking, and industrial systems where thermal performance, transient response, and protection integrity are critical.
FAQ
What is the output voltage tolerance of the ISL8016IR18Z-T over temperature and load?
The ISL8016IR18Z-T delivers a fixed 1.8V output with ±1% accuracy over the full operating temperature range (–40°C to +85°C), line (2.7V–5.5V), and load (0–6A). This is confirmed by the VVFB specification: 1.782V (min) to 1.818V (max) at TA = –40°C to +85°C, ensuring reliable core voltage compliance for 1.8V logic families without external trimming.
Does the ISL8016IR18Z-T support pre-bias start-up, and how is it enabled?
Yes, the ISL8016IR18Z-T supports pre-biased output start-up natively - no configuration required. When EN is asserted, the device detects existing output voltage and initiates soft-start without forcing reverse current, preventing disruption to downstream powered circuits. This behavior is inherent to the control architecture and verified in Figure 24 of the FN7616 datasheet.
Can the ISL8016IR18Z-T be synchronized to an external clock, and what is the valid frequency range?
Yes, the ISL8016IR18Z-T accepts external synchronization via the SYNCIN pin across 500 kHz to 4 MHz. The rising edge of the external clock triggers the PHASE node, and the internal oscillator is disabled. Minimum on-time (140 ns) must be respected, and SYNCIN logic thresholds are specified as 0.70–0.80 V for high, with 0.15 V hysteresis.
What protection features are integrated into the ISL8016IR18Z-T?
The ISL8016IR18Z-T integrates peak current limiting, hiccup-mode short-circuit protection (17 consecutive faults trigger shutdown), overtemperature shutdown (150°C), undervoltage lockout (2.7V rising threshold), reverse current blocking, and soft-stop output discharge during disable. All protections are fully autonomous and require no external components.
Is the ISL8016IR18Z-T pin-compatible with other variants in the ISL8016 family?
Yes, all ISL8016 variants - including ISL8016IR12Z, ISL8016IR15Z, ISL8016IR18Z-T, ISL8016IR25Z, and ISL8016IR33Z - share identical 20-lead 3×4 QFN packaging, pinout, and footprint (PKG DWG # L20.3x4), enabling voltage-scaling flexibility without PCB redesign.
ISL8016IR18Z-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 6A
- Frequency - Switching:
- 525kHz ~ 3.9MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x4)
ISL8016IR18Z-T FAQ
1.How can I place an order for ISL8016IR18Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IR18Z-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL8016IR18Z-T reliable?
The price and inventory of ISL8016IR18Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IR18Z-T is usually 5 days.
3.What payment methods are accepted for ISL8016IR18Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IR18Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IR18Z-T?
ISL8016IR18Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IR18Z-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL8016IR18Z-T?
For technical support, including ISL8016IR18Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IR18Z-T requirements.
6.How does Aetrix verify that ISL8016IR18Z-T is sourced from the original manufacturer or authorized distributors?
All ISL8016IR18Z-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL8016IR18Z-T meets industry standards.
7.What is the process for return or replacement of ISL8016IR18Z-T?
All ISL8016IR18Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IR18Z-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL8016IR18Z-T part is unused and in its original packaging.
Return procedure for ISL8016IR18Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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