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Renesas ISL8016IRAJZ-T
- Part No.:
- ISL8016IRAJZ-T
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IRAJZ-T.pdf
- Description:
- IC REG BUCK ADJ 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:14,510
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Product details
Overview
ISL8016IRAJZ-T from Renesas Electronics (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 6A continuous output current from a 2.7V–5.5V input, with adjustable output voltage from 0.6V to VIN. It integrates low-RDS(on) P- and N-channel MOSFETs, supports 500kHz–4MHz switching frequency, and features pre-bias start-up, reverse current protection, and overtemperature shutdown. It is used in FPGA and microprocessor point-of-load (POL) power supplies.
For engineers reviewing the ISL8016IRAJZ-T datasheet, ISL8016IRAJZ-T pinout, ISL8016IRAJZ-T application, or ISL8016IRAJZ-T equivalent, key selection considerations include its adjustable current limit (2A/4A/6A via ISET), ±10% output margining (VSET), 1% reference accuracy over temperature/load/line, forced-continuous or discontinuous light-load operation, and phase-interleaving capability for >6A systems.
Technical Context
The ISL8016IRAJZ-T employs peak current-mode control with slope compensation for fast transient response and loop stability. Its dual-MOSFET architecture enables 100% duty-cycle operation (<200mV dropout at 6A) and eliminates external high-side switch requirements.
It supports three operational modes: PWM (SYNCIN = HI), PFM (SYNCIN = LO), and external synchronization (SYNCIN driven by master clock). Frequency is set either internally at 1MHz (FS tied to VIN) or externally via resistor (500kHz–4MHz), with internal compensation defaulting when FS = VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6A continuous - supports high-current POL rails for FPGAs and SoCs without external MOSFETs. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion, 3.3V, and 5V intermediate bus architectures. |
| Output Voltage Range | 0.6V to VIN - enables core voltage regulation down to sub-1V for modern processors. |
| Switching Frequency | 500kHz–4MHz adjustable - allows EMI optimization and small external component selection (e.g., 1µH inductor). |
| Reference Accuracy | ±1% over temperature/load/line - ensures tight output regulation critical for sensitive digital loads. |
| Quiescent Current | 70µA in PFM no-load - extends battery life in portable instrumentation and handheld devices. |
| Efficiency | Up to 97% - minimizes thermal stress and improves power density in space-constrained designs. |
Pinout & Package
The ISL8016IRAJZ-T is housed in a thermally enhanced 20-lead 3mm × 4mm QFN package with exposed pad (L20.3x4), requiring connection of the EPAD to SGND for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,19,20 PGND | Power ground return | Low-inductance path for high pulsed currents; must be connected directly to power plane under EPAD. |
| 2,3,4 PHASE | Switching node | Connects to inductor; carries high di/dt square wave - requires short, wide trace routing. |
| 5,6,7 VIN | Main input supply | Accepts 2.7V–5.5V; requires two 22µF ceramic capacitors placed close to pins for high-frequency decoupling. |
| 8 PG | Power-good open-drain output | Signals regulation status after 1ms delay; requires external 10kΩ–100kΩ pull-up to VIN. |
| 10 SYNCIN | Mode selection/synchronization input | Logic-high = PWM; logic-low = PFM; external clock = sync master/slave timing control. |
| 11 EN | Enable control | Active-high; internal 1MΩ pull-down prevents floating; drives low to discharge output capacitor. |
| 12 FS | Frequency setting | Resistor-to-GND sets 500kHz–4MHz; tied to VIN for 1MHz default with internal compensation. |
| 14 ISET | Current limit configuration | Floating = 6A; VIN = 4A; SGND = 2A - sets OCP threshold and SKIP current limit. |
| 15 SS | Soft-start timing | SGND = 1ms internal ramp; capacitor-to-SGND adjusts ramp time (≤33nF recommended). |
| 16 COMP / 17 VFB | Compensation / feedback | VFB senses output divider; COMP is error amp output - tied to SGND if using internal compensation (FS = VIN). |
| 18 SGND | Signal ground reference | Separate from PGND; connects to EPAD and forms reference for VFB, COMP, and analog blocks. |
| 9,13 SYNCOUT / VSET | Synchronization output / margining control | SYNCOUT sources 250µA pulse for multi-phase sync; VSET = VIN/-10%/floating selects +10%/-10%/no margining. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N MOSFETs | Eliminates external high-side switch and reduces BOM count; P-FET RDS(on) = 45mΩ (VIN=5V), N-FET = 35mΩ. |
| Adjustable current limit | Three discrete settings (2A/4A/6A) via ISET pin - enables safe operation across varying load profiles and fault conditions. |
| Pre-bias start-up | Allows safe turn-on into pre-charged output - essential for hot-swap and redundant power systems. |
| Reverse current protection | Blocks negative inductor current flow during shutdown or light load - prevents output capacitor discharge into input rail. |
| Phase interleaving support | SYNCOUT/SYNCIN interface enables precise master-slave timing alignment for multi-phase >6A configurations with reduced input/output ripple. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, high-density DC/DC modules for telecom and industrial backplanes requiring stable 1.2V–3.3V rails at up to 6A. IC Role / Device Role / Timing Role: Primary synchronous buck controller with integrated power switches and full protection suite. Use Value: Reduces solution size to <0.15in² while maintaining 97% efficiency and robust fault handling. | Use Scenario: Core voltage supply for Xilinx Artix-7 FPGAs or ARM Cortex-A series processors in embedded edge devices. IC Role / Device Role / Timing Role: Point-of-load regulator delivering tightly regulated sub-1V to 1.8V outputs with fast load-transient response. Use Value: 1% reference accuracy and current-mode control ensure <±15mV output deviation during 0→6A step loads. |
| Portable Instruments | Li-ion Battery Powered Devices |
Use Scenario: Handheld test equipment (e.g., portable oscilloscopes) operating from 3.7V nominal Li-ion batteries. IC Role / Device Role / Timing Role: Main system rail converter supporting dynamic voltage scaling and ultra-low quiescent operation. Use Value: 70µA PFM quiescent current extends runtime; 100% duty-cycle mode maintains regulation down to 2.9V input. | Use Scenario: Wearables and medical sensors powered by single-cell Li-ion with strict thermal and size constraints. IC Role / Device Role / Timing Role: High-efficiency buck regulator supplying 1.8V/3.3V rails to RF transceivers and ADCs. Use Value: Exposed-pad QFN package achieves θJA = 42°C/W, enabling 6A operation without heatsink in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546B24RVFT | 6A, 4.5–18V input, fixed 1.2V output; PMBus interface; higher input range but no adjustable VOUT. | Targeted at industrial 12V intermediate bus; lacks VSET margining and pre-bias start. | Select when digital telemetry and higher input voltage are required; not suitable for 2.7–5.5V battery inputs. |
| MP2315GJ-Z | 6A, 4.5–28V input, adjustable 0.8–15V output; lower quiescent (30µA), no SYNCOUT or phase interleaving. | Optimized for cost-sensitive consumer power; missing PFM/PWM mode select and current limit programming. | Choose for simpler, lower-cost 6A buck where sync capability and precision margining are unnecessary. |
Compared with TPS546B24RVFT and MP2315GJ-Z, the ISL8016IRAJZ-T uniquely combines 2.7–5.5V input compatibility, ±10% output margining, programmable current limit, and hardware-based phase synchronization - making it optimal for battery-powered, multi-rail FPGA and µP systems requiring design flexibility and robustness.
Availability
ISL8016IRAJZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/µP and FPGA power delivery, and portable instrumentation requiring stable component supply and long-term production continuity.
Supply support for ISL8016IRAJZ-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.
The ISL8016IRAJZ-T belongs to Renesas' high-efficiency synchronous buck regulator product line, designed specifically for low-voltage, high-current point-of-load applications in battery-powered and space-constrained embedded systems.
FAQ
What is the maximum output current capability of the ISL8016IRAJZ-T?
The ISL8016IRAJZ-T delivers up to 6A continuous output current under recommended operating conditions (TA ≤ +85°C, proper PCB layout, and thermal management). Its 100% duty-cycle capability ensures regulation even at low dropout (e.g., <200mV at 6A), and phase interleaving with a second ISL8016IRAJZ-T enables >6A solutions. The actual achievable current depends on ambient temperature, input voltage, and heatsinking - refer to the thermal resistance (θJA = 42°C/W) and derating curves in the FN7616 datasheet.
How does the ISL8016IRAJZ-T support output voltage margining?
The ISL8016IRAJZ-T supports ±10% output voltage margining via the VSET pin: connect VSET to VIN for +10%, to SGND for –10%, or leave floating for nominal regulation. This feature enables system-level validation of supply tolerance margins during production testing and field diagnostics. Margining applies directly to the internal 0.6V reference, preserving the same 1% accuracy across all three states - critical for verifying downstream logic and memory timing margins without changing feedback resistors.
Can the ISL8016IRAJZ-T operate with a pre-biased output?
Yes, the ISL8016IRAJZ-T supports start-up into a pre-biased output, a requirement for hot-swap and redundant power systems. During pre-bias start-up, the IC disables the high-side MOSFET until the internal soft-start ramp reaches the output voltage level, preventing reverse current flow and output overshoot. This behavior is enabled by default and requires no external configuration - confirmed in the "Start-up with Pre-Biased Output" feature list and Figure 24 of the FN7616 datasheet.
What are the key differences between PWM and PFM modes on the ISL8016IRAJZ-T?
PWM mode (SYNCIN = HI) forces constant-frequency operation for low-noise, predictable EMI profiles and best transient response. PFM mode (SYNCIN = LO) skips pulses at light load to reduce switching losses, achieving 70µA quiescent current. The ISL8016IRAJZ-T automatically transitions between modes based on load - but manual forcing allows designers to prioritize efficiency (PFM) or noise control (PWM) independent of load. Both modes retain full protection and regulation integrity.
How is the switching frequency configured on the ISL8016IRAJZ-T?
The ISL8016IRAJZ-T switching frequency is set via the FS pin: tying FS to VIN configures 1MHz default with internal compensation; connecting a resistor from FS to SGND adjusts frequency from 500kHz to 4MHz per RF = (220×10³)/fOSC − 14 kΩ. External frequency setting also enables use of external compensation for optimized loop response in demanding applications - unlike fixed-frequency alternatives that lack this flexibility.
ISL8016IRAJZ-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- 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)
ISL8016IRAJZ-T FAQ
1.How can I place an order for ISL8016IRAJZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IRAJZ-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 ISL8016IRAJZ-T reliable?
The price and inventory of ISL8016IRAJZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IRAJZ-T is usually 5 days.
3.What payment methods are accepted for ISL8016IRAJZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IRAJZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IRAJZ-T?
ISL8016IRAJZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IRAJZ-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 ISL8016IRAJZ-T?
For technical support, including ISL8016IRAJZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IRAJZ-T requirements.
6.How does Aetrix verify that ISL8016IRAJZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8016IRAJZ-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 ISL8016IRAJZ-T meets industry standards.
7.What is the process for return or replacement of ISL8016IRAJZ-T?
All ISL8016IRAJZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IRAJZ-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 ISL8016IRAJZ-T part is unused and in its original packaging.
Return procedure for ISL8016IRAJZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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