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Renesas ISL8016IR15Z
- Part No.:
- ISL8016IR15Z
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IR15Z.pdf
- Description:
- IC REG BUCK 1.5V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,882
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Product details
Overview
ISL8016IR15Z from Renesas (formerly Intersil) is a 6A monolithic synchronous buck regulator with fixed 1.5V output, designed for point-of-load DC/DC conversion in FPGA, microprocessor, and DSP power supplies. It operates from 2.7V–5.5V input, delivers ±1% output accuracy over temperature/load/line, supports 100% duty-cycle operation (<200mV dropout at 6A), and integrates low-RDS(on) P- and N-channel MOSFETs.
For engineers reviewing the ISL8016IR15Z datasheet, ISL8016IR15Z pinout, ISL8016IR15Z application, or ISL8016IR15Z equivalent, key selection considerations include its fixed 1.5V output, adjustable current limit (2A/4A/6A via ISET), 500kHz–4MHz frequency programming, pre-bias start capability, and thermal shutdown protection - all in a 20-lead 3×4 QFN package with exposed pad.
Technical Context
The ISL8016IR15Z employs peak current-mode control with slope compensation for fast transient response and inherent loop stability. Its integrated dual-MOSFET power stage uses a P-channel high-side switch (45mΩ typical at 5V) and N-channel low-side switch (35mΩ typical at 5V), enabling high efficiency up to 97% and 100% duty-cycle operation for ultra-low dropout.
It supports dual operating modes: PWM (forced continuous conduction) for low-noise applications and PFM (pulse-skipping) for light-load efficiency optimization. Mode selection is controlled by SYNCIN logic level, while synchronization up to 4MHz and phase interleaving enable multi-phase >6A configurations with reduced input/output ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.500V ±1% over -40°C to +85°C - ensures stable core voltage for 1.5V FPGA I/O or processor subsystems without external feedback resistors. |
| Max Output Current | 6A continuous - supports high-current digital loads such as multi-core SoCs and dense FPGA banks without external current sharing. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), 3.3V rail, or 5V intermediate bus architectures. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 1MHz) - enables optimization of inductor size, efficiency, and EMI profile per system constraints. |
| Quiescent Current | 70µA in PFM no-load mode - extends battery life in portable instrumentation and always-on subsystems. |
| Thermal Resistance | θJA = 42°C/W, θJC = 5°C/W - validated for high-power density layouts using the exposed pad tied to SGND and multiple thermal vias. |
| Protection Features | Overcurrent (hiccup mode), overtemperature (150°C shutdown), reverse current, UVLO (2.7V rising), and soft-stop discharge - ensures robust operation under fault conditions without external circuitry. |
Pinout & Package
The ISL8016IR15Z is housed in a RoHS-compliant, lead-free 20-lead 3×4 mm QFN package (L20.3x4) with an exposed thermal pad requiring connection to SGND for optimal electrical and thermal performance.
| 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 | Switching node connecting to inductor - carries high di/dt square wave; requires short, low-inductance layout to reduce EMI and ringing. |
| 5, 6, 7 | VIN | Main input supply - requires two 22µF ceramic capacitors placed close to pins for effective high-frequency decoupling. |
| 8 | PG | Open-drain power-good signal - indicates regulation status after 1ms delay; requires external 10kΩ–100kΩ pull-up to VIN for system sequencing. |
| 10 | SYNCIN | Mode control/synchronization input - logic high enables PWM, low enables PFM, and external clock synchronizes switching edge. |
| 11 | EN | Enable/disable control with internal 1MΩ pull-down - active-high; drives low to shut down IC and discharge output capacitor. |
| 12 | FS | Frequency set pin - connects to GND via resistor (402kΩ → 525kHz; 42.4kΩ → 3.9MHz) or to VIN for default 1MHz internal compensation. |
| 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 = 1ms internal ramp; capacitor to SGND adjusts ramp time (≤33nF recommended). |
| 16, 17 | COMP / VFB | Compensation node / feedback input - VFB monitors output via divider (not needed for fixed-VOUT variants); COMP used only with external compensation. |
| 18 | SGND | Signal ground reference - separate from PGND; connects to exposed pad and forms reference for error amplifier and bias circuits. |
Key Features
| Feature | Design Value |
|---|---|
| 1% reference accuracy over temp/load/line | Ensures tight output regulation across industrial temperature range (-40°C to +85°C) without calibration, critical for voltage-sensitive logic cores. |
| Adjustable current limit (2A/4A/6A) | Allows design flexibility: lower limits protect against inrush or board faults; full 6A rating supports peak FPGA dynamic loads. |
| Pre-bias start capability | Enables safe startup into pre-charged output rails - essential for hot-swap systems and multi-rail power sequencing where VOUT may already be biased. |
| 100% duty-cycle operation | Supports <200mV dropout at 6A, enabling use in low-VIN scenarios (e.g., 1.8V input → 1.5V output) without linear regulator fallback. |
| Phase interleaving support | Permits paralleling multiple ISL8016IR15Z units with master/slave SYNCOUT/SYNCIN to deliver >6A with reduced input/output ripple and thermal spreading. |
Applications
| FPGA Core Power Supply | Microprocessor I/O Domain |
|---|---|
Use Scenario: Providing stable 1.5V rail to Xilinx Artix-7 or Intel Cyclone V FPGA core logic under dynamic load transients up to 4A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 1.5V at up to 6A with <1% output error and sub-10µs transient recovery. Use Value: Eliminates need for external current sensing or compensation components; integrated MOSFETs and 1ms soft-start prevent inrush damage during FPGA configuration. | Use Scenario: Powering ARM Cortex-A series processor I/O banks requiring tightly regulated 1.5V with low noise and fast load-step response. IC Role / Device Role / Timing Role: Point-of-load regulator with programmable frequency (1MHz default) and PWM/PSM mode selection to balance efficiency vs. EMI. Use Value: 97% peak efficiency reduces thermal load on compact PCBs; PFM mode cuts quiescent current to 70µA during idle states. |
| Portable Test Instrumentation | Industrial PLC I/O Module |
Use Scenario: Battery-powered handheld oscilloscope or DMM requiring 1.5V for ADC reference and signal conditioning circuitry. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating from single-cell Li-ion (3.0–4.2V) with low dropout and reverse current protection. Use Value: 100% duty-cycle operation extends runtime near battery end-of-discharge; soft-stop discharge prevents backfeed during shutdown. | Use Scenario: DIN-rail mounted PLC module needing reliable 1.5V supply for isolated digital I/O drivers under wide ambient temperature (-40°C to +85°C). IC Role / Device Role / Timing Role: Robust POL regulator with overtemperature shutdown (150°C), UVLO (2.7V), and hiccup-mode OCP for field-deployed reliability. Use Value: Exposed-pad QFN package with θJC = 5°C/W enables passive cooling in sealed enclosures; -40°C to +85°C rating meets industrial grade requirements. |
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, 1.5V fixed output; 4.5–17V input; 3.5MHz max frequency; integrated FETs but higher RDS(on) (50/30mΩ); no pre-bias start. | Requires higher input voltage (≥4.5V); unsuitable for Li-ion direct input; lacks pre-bias capability for hot-swap systems. | Select when input bus is ≥4.5V and high-frequency operation (>2MHz) is prioritized over low-VIN efficiency. |
| MP2315GJ-Z | 6A, adjustable output (0.8V–6V); 4.5–28V input; 500kHz–2.2MHz frequency; no PFM mode; no margining or SYNCOUT. | Not pin-compatible; requires external feedback resistors; lacks PFM for ultra-low-IQ; no phase interleaving support. | Select for cost-sensitive industrial applications with wide-input buses and no requirement for light-load efficiency or multi-phase sync. |
Compared with TPS54620RGYT and MP2315GJ-Z, the ISL8016IR15Z uniquely combines 2.7V minimum input, fixed 1.5V output, pre-bias start, and PFM/PWM mode flexibility - making it optimal for battery-powered and low-voltage POL designs where simplicity, efficiency, and robustness are jointly required.
Availability
ISL8016IR15Z is available at Aetrix Electronics and suitable for FPGA power delivery, microprocessor I/O domains, and portable instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for ISL8016IR15Z 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 product support, documentation, and manufacturing continuity for the ISL8016 family.
The ISL8016 product line was designed specifically for high-current, low-voltage point-of-load regulation in space-constrained digital systems - emphasizing integration, thermal efficiency, and ease of use in FPGA, µP, and DSP power applications.
FAQ
What is the output voltage tolerance of the ISL8016IR15Z over temperature and load?
The ISL8016IR15Z provides ±1% output voltage accuracy over the full industrial temperature range (-40°C to +85°C), across line (2.7V–5.5V VIN), load (0–6A), and process variations. This is achieved via a precision 0.6V internal reference and trimmed feedback network specific to the 1.5V fixed-output variant, eliminating external resistor drift errors. The ISL8016IR15Z datasheet specifies 1.485V to 1.515V at nominal conditions.
Does the ISL8016IR15Z support pre-bias start, and how is it implemented?
Yes, the ISL8016IR15Z supports pre-bias start - it safely powers up into an output rail already charged to 1.5V without forcing reverse current or damaging downstream components. This is enabled by internal circuitry that monitors VFB during startup and disables the high-side FET until the internal soft-start ramp reaches the pre-biased voltage level. No external components are required; the feature is inherent to the ISL8016IR15Z silicon design.
How do I configure the ISL8016IR15Z for 6A current limiting?
To configure the ISL8016IR15Z for its full 6A current limit, leave the ISET pin floating (unconnected). When ISET is floating, the internal current sense threshold is set to 7.7–11.5A peak, corresponding to a nominal 6A continuous output. Do not tie ISET to VIN (4A limit) or SGND (2A limit) unless derating is required for thermal or reliability reasons. The ISL8016IR15Z datasheet confirms this configuration on page 7 under "Positive Peak Current Limit".
Can the ISL8016IR15Z be synchronized to an external clock, and what is the valid frequency range?
Yes, the ISL8016IR15Z can be synchronized to an external clock applied to the SYNCIN pin across a 500kHz–4MHz range. The external clock's rising edge triggers the PHASE node, and the internal oscillator is disabled. Valid input requires logic-high voltage ≥0.75V and minimum pulse width sufficient to meet the 140ns minimum on-time requirement. The ISL8016IR15Z also provides a 250µA SYNCOUT current source for daisy-chaining or master-slave phase shifting.
What thermal management practices are recommended for the ISL8016IR15Z in high-current operation?
For reliable 6A operation, the ISL8016IR15Z requires the exposed thermal pad (EPAD) to be soldered directly to the SGND plane using ≥6 thermal vias (0.3mm diameter) placed within the pad area. The PCB must provide ≥250mm² of 2oz copper on inner/outer layers connected to SGND. Ambient temperature must remain ≤+85°C, and junction temperature should be verified to stay below 125°C using θJA = 42°C/W. The ISL8016IR15Z thermal data is specified in Table "Thermal Information" on page 7 of FN7616 Rev 1.00.
ISL8016IR15Z 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):
- 1.5V
- 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)
ISL8016IR15Z FAQ
1.How can I place an order for ISL8016IR15Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IR15Z 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 ISL8016IR15Z reliable?
The price and inventory of ISL8016IR15Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IR15Z is usually 5 days.
3.What payment methods are accepted for ISL8016IR15Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IR15Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IR15Z?
ISL8016IR15Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IR15Z 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 ISL8016IR15Z?
For technical support, including ISL8016IR15Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IR15Z requirements.
6.How does Aetrix verify that ISL8016IR15Z is sourced from the original manufacturer or authorized distributors?
All ISL8016IR15Z 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 ISL8016IR15Z meets industry standards.
7.What is the process for return or replacement of ISL8016IR15Z?
All ISL8016IR15Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IR15Z, 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 ISL8016IR15Z part is unused and in its original packaging.
Return procedure for ISL8016IR15Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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