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Renesas ISL8016IR18Z
- Part No.:
- ISL8016IR18Z
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IR18Z.pdf
- Description:
- IC REG BUCK 1.8V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:740
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Product details
Overview
ISL8016IR18Z from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 6A continuous output current with fixed 1.8V output, 2.7V–5.5V input range, and 97% peak efficiency. It integrates P- and N-channel MOSFETs, supports adjustable frequency (500kHz–4MHz), and features reverse current protection, pre-bias start-up, and over-temperature shutdown - deployed in FPGA and µP core power rails.
For engineers reviewing the ISL8016IR18Z datasheet, ISL8016IR18Z pinout, ISL8016IR18Z application, or ISL8016IR18Z equivalent, this page delivers verified technical context, validated pin functions, confirmed 1.8V fixed-output behavior, thermal performance data for the 3x4 QFN package, and two rigorously cross-checked alternative parts for POL and embedded power design.
Technical Context
The ISL8016IR18Z uses peak current-mode control with slope compensation (360mV/Ts) and internal 0.6V reference, enabling fast transient response and stable loop behavior across 0–6A load. Its dual-MOSFET architecture achieves <200mV dropout at 6A via 100% duty-cycle operation and supports forced continuous or discontinuous conduction mode selection via SYNCIN logic level.
It implements hiccup-mode short-circuit protection triggered after 17 consecutive overcurrent detections, with soft-stop output discharge during disable and 1ms internal soft-start ramp. The device offers ±10% output voltage margining via VSET pin and programmable current limit (2A/4A/6A) via ISET pin - all confirmed for the ISL8016IR18Z variant per FN7616 Rev 1.00.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.782–1.818V (±1% over -40°C to +85°C), set internally - no external feedback divider required. |
| Max Output Current | 6A continuous; peak current limit configurable to 7.7–11.5A (ISET = floating) for robust overload handling. |
| Input Voltage Range | 2.7V to 5.5V DC - compatible with single-cell Li-ion, 3.3V, and 5V intermediate bus architectures. |
| Switching Frequency | Default 1MHz (FS tied to VIN); adjustable 500kHz–4MHz via resistor - enables EMI optimization and size/efficiency trade-offs. |
| Quiescent Current | 70µA in PFM no-load mode - critical for battery-powered portable instruments and always-on subsystems. |
| Thermal Resistance | θJA = 42°C/W, θJC = 5°C/W (3x4 QFN) - supports >6A operation with minimal heatsinking in compact layouts. |
| Protection Features | Reverse current protection, pre-bias start-up, hiccup-mode OCP, thermal shutdown (150°C), and PG fault signaling. |
Pinout & Package
The ISL8016IR18Z is housed in a RoHS-compliant, lead-free 20-lead 3mm × 4mm QFN package (L20.3x4) with exposed thermal pad. The EPAD must be soldered to SGND for electrical integrity and optimal thermal dissipation (via count recommended).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19, 20 | PGND | Power ground return for high-current switching paths - requires low-inductance connection to input/output capacitors. |
| 2, 3, 4 | PHASE | Switch node connecting integrated high-side and low-side MOSFETs to inductor - drives LC filter and defines switching waveform. |
| 5, 6, 7 | VIN | Main input supply (2.7–5.5V); decoupled by two 22µF ceramic caps directly to PGND for stability. |
| 8 | PG | Open-drain power-good flag - pulled low during startup, fault, or disable; requires 10kΩ–100kΩ pull-up to VIN. |
| 10 | SYNCIN | Mode control: HI = PWM, LO = PFM, external clock = synchronization source - enables noise-sensitive or multi-phase designs. |
| 11 | EN | Active-high enable with 1MΩ internal pull-down - initiates soft-start on HI; discharges output on LO for controlled shutdown. |
| 12 | FS | Frequency select: tied to VIN = 1MHz default; resistor to SGND sets 500kHz–4MHz - determines compensation and layout constraints. |
| 14 | ISET | Peak current limit configuration: floating = 6A, VIN = 4A, SGND = 2A - sets OCP threshold and inductor sizing requirements. |
| 16, 17 | COMP / VFB | VFB is feedback input (shorted to output for fixed-VOUT variants); COMP is error amplifier output - internal compensation used for ISL8016IR18Z. |
| 18 | SGND | Signal ground reference for feedback, compensation, and logic pins - isolated from PGND except at EPAD for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N MOSFETs | Reduces BOM count by eliminating external switches; P-FET RDS(on) = 31–45mΩ, N-FET RDS(on) = 19–35mΩ at 5V VIN - enables >95% efficiency at 3A. |
| Pre-bias start-up | Allows safe turn-on when output capacitor is pre-charged - essential for hot-swap and multi-rail sequencing in FPGA systems. |
| Phase interleaving support | SYNCOUT current-source output (250µA) enables master-slave timing alignment for >6A applications - reduces input/output ripple by √N. |
| Adjustable soft-start | SS pin accepts capacitor (≤33nF) to extend ramp beyond internal 1ms - prevents inrush into large output capacitance or downstream LDOs. |
| Output voltage margining | VSET pin selects -10%, nominal, or +10% output - supports system-level validation, burn-in testing, and tolerance margin analysis. |
Applications
| FPGA Core Power | µP/ASIC Core Rail |
|---|---|
Use Scenario: Powers 28nm/16nm FPGA core logic requiring tightly regulated 1.8V at up to 6A with fast load-step response. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing POL (point-of-load) conversion from 5V or 3.3V intermediate bus. Use Value: 1.8V ±1% accuracy and 1MHz switching ensure stable core voltage under dynamic logic switching; hiccup OCP prevents damage during FPGA configuration faults. |
Use Scenario: Supplies core voltage to ARM-based microprocessors in industrial gateways with ambient temperature up to +85°C. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter operating in forced PWM mode to suppress RF interference near wireless modules. Use Value: 70µA quiescent current extends battery life in sleep modes; thermal resistance of 5°C/W enables full 6A operation without heatsink. |
| Portable Test Equipment | Li-ion Powered Instrumentation |
Use Scenario: Delivers clean 1.8V rail to ADC/DAC signal chains in handheld oscilloscopes with strict noise floor requirements. IC Role / Device Role / Timing Role: Low-noise buck regulator configured in PFM mode at light loads and synchronized to system clock to avoid beat frequencies. Use Value: Adjustable frequency (500kHz–4MHz) and phase-shift capability eliminate switching artifacts in 12-bit+ measurement bandwidths. |
Use Scenario: Powers sensor fusion subsystem (IMU, GPS, BLE) from single-cell Li-ion (3.0–4.2V) with minimal board area. IC Role / Device Role / Timing Role: Compact 3x4 QFN buck converter supporting 100% duty cycle for low-dropout operation as battery discharges. Use Value: 200mV dropout at 6A maintains regulation down to 2.9V input - extends usable battery runtime by >12% versus non-100% duty-cycle alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RGYR | 6A, 3–17V input, adjustable VOUT only; no fixed 1.8V option; requires external feedback resistors. | Suitable for wider input ranges but adds design complexity for fixed 1.8V use - increases BOM and layout area. | Select if input exceeds 5.5V or if programmable output margining is needed beyond ±10%. |
| MP2315GJ-Z | 6A, 4.5–28V input, fixed 1.8V option available; higher min input (4.5V) excludes Li-ion direct connection. | Limited to higher-voltage intermediate buses; lacks pre-bias start-up and phase interleaving capability. | Choose for cost-sensitive 12V/24V POL applications where thermal performance and sequencing are secondary. |
Compared with TPS54620RGYR and MP2315GJ-Z, the ISL8016IR18Z uniquely combines fixed 1.8V output, 2.7V minimum input for Li-ion compatibility, pre-bias start-up, and master-slave synchronization - making it optimal for space-constrained, battery-powered FPGA and µP core supplies requiring zero external feedback components.
Availability
ISL8016IR18Z is available at Aetrix Electronics and suitable for FPGA core power, µP/ASIC core rails, portable test equipment, and Li-ion powered instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL8016IR18Z 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 with full datasheet, simulation model, and application note availability.
The ISL8016IR18Z belongs to Renesas' ISL8016 family of monolithic synchronous buck regulators, designed specifically for high-current, low-voltage POL applications in computing, communications, and portable electronics where efficiency, thermal performance, and sequencing reliability are critical.
FAQ
What is the output voltage tolerance of the ISL8016IR18Z over temperature and load?
The ISL8016IR18Z delivers 1.782V to 1.818V (±1%) across -40°C to +85°C ambient and 0–6A load, as specified in Table 1 on page 7 of FN7616 Rev 1.00. This tight tolerance is achieved via internal trimming of the 0.6V bandgap reference and feedback network - no external calibration is required for the ISL8016IR18Z.
Does the ISL8016IR18Z require external compensation components?
No, the ISL8016IR18Z uses internal compensation when FS is tied to VIN (default 1MHz operation). Per page 3 of FN7616, the COMP pin must be connected to SGND in this configuration. External compensation is optional only when FS is resistor-programmed - not required for standard ISL8016IR18Z deployment.
Can the ISL8016IR18Z operate with a 2.5V input supply?
Yes, the ISL8016IR18Z supports input voltages from 2.7V to 5.5V, so 2.5V is below the absolute minimum. The undervoltage lockout (UVLO) rising threshold is 2.7V (typical), meaning the ISL8016IR18Z will remain disabled until VIN exceeds 2.7V - ensuring reliable start-up and preventing erratic regulation.
How is current limit configured on the ISL8016IR18Z?
The ISL8016IR18Z current limit is set via the ISET pin: floating = 6A (default), connected to VIN = 4A, connected to SGND = 2A. These settings directly configure the OCP comparator threshold per page 8 of FN7616 - allowing precise inductor and MOSFET stress management without changing the ISL8016IR18Z part number.
Is the ISL8016IR18Z pin-compatible with other ISL8016 fixed-output variants?
Yes, all ISL8016 fixed-output variants (IR12Z, IR15Z, IR18Z, IR25Z, IR33Z) share identical 20-lead 3x4 QFN packaging, pinout, and thermal pad layout per page 2 of FN7616. Only the internal feedback network differs - enabling drop-in replacement when adjusting output voltage within the same PCB footprint.
ISL8016IR18Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ISL8016IR18Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IR18Z 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 reliable?
The price and inventory of ISL8016IR18Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IR18Z is usually 5 days.
3.What payment methods are accepted for ISL8016IR18Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IR18Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IR18Z?
ISL8016IR18Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IR18Z 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?
For technical support, including ISL8016IR18Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IR18Z requirements.
6.How does Aetrix verify that ISL8016IR18Z is sourced from the original manufacturer or authorized distributors?
All ISL8016IR18Z 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 meets industry standards.
7.What is the process for return or replacement of ISL8016IR18Z?
All ISL8016IR18Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IR18Z, 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 part is unused and in its original packaging.
Return procedure for ISL8016IR18Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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