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Renesas ISL8016IR12Z
- Part No.:
- ISL8016IR12Z
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IR12Z.pdf
- Description:
- IC REG BUCK 1.2V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,934
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Product details
Overview
ISL8016IR12Z from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 6A continuous output current with fixed 1.2V 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-designed for FPGA core power in space-constrained embedded systems.
For engineers reviewing the ISL8016IR12Z datasheet, ISL8016IR12Z pinout, ISL8016IR12Z application, or ISL8016IR12Z equivalent, key selection criteria include its fixed 1.2V output tolerance (±1%), 100% duty-cycle capability for low-dropout operation, phase-interleaving support for >6A scaling, and robust hiccup-mode short-circuit protection with 17-cycle fault detection.
Technical Context
The ISL8016IR12Z employs peak current-mode control with slope compensation for fast transient response and loop stability. Its internal 0.6V reference and feedback divider set the fixed 1.2V output with ±1% accuracy over temperature, line, and load-verified at -40°C to +85°C ambient.
It supports dual operating modes: PWM (forced continuous conduction) for low-noise applications and PFM (pulse-skipping) for ultra-low quiescent current (70µA at no load). Synchronization via SYNCIN/SYNCOUT enables master-slave phase interleaving across multiple ICs to reduce input/output ripple and support 12A+ total output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% (measured at VFB; confirmed over -40°C to +85°C) |
| Max Output Current | 6A continuous (with thermal derating per θJA = 42°C/W in 3x4 QFN) |
| Input Voltage Range | 2.7V to 5.5V DC (UVLO rising threshold = 2.7V, falling = 2.4V) |
| Peak Efficiency | 97% at 5VIN/1.2VOUT/3A (enables high-density POL designs with minimal heat sink need) |
| Switching Frequency | Adjustable 500kHz–4MHz; default 1MHz when FS tied to VIN (supports EMI-sensitive layouts) |
| Quiescent Current | 70µA in PFM no-load mode (extends battery life in portable instruments) |
| Protection Features | Hiccup-mode OCP (17-cycle fault lockout), thermal shutdown (150°C), reverse current limit (-3A), soft-stop discharge |
Pinout & Package
ISL8016IR12Z is housed in a thermally enhanced 20-lead 3mm × 4mm QFN package with exposed pad (PKG DWG # L20.3x4), requiring connection of the EPAD to SGND for optimal thermal performance and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19, 20 | PGND | Power ground return path for high-current switching node; must be low-inductance plane connection |
| 2, 3, 4 | PHASE | Switching node connecting to inductor; carries full AC ripple current and high di/dt |
| 5, 6, 7 | VIN | Main input supply (2.7V–5.5V); requires two 22µF ceramic capacitors directly to PGND |
| 8 | PG | Open-drain power-good flag; asserts after 1ms delay once VOUT reaches regulation ±15% |
| 10 | SYNCIN | Mode select/sync input: logic high = PWM, logic low = PFM, external clock = sync master |
| 11 | EN | Active-high enable with internal 1MΩ pull-down; drives low to fully discharge output capacitor |
| 12 | FS | Frequency set pin: connect resistor to SGND for 500kHz–4MHz; tie to VIN for default 1MHz |
| 14 | ISET | Current limit configuration: floating = 6A peak, VIN = 4A, SGND = 2A (sets OCP and SKIP thresholds) |
| 15 | SS | Soft-start timing control: tie to SGND for 1ms ramp; add capacitor for extended rise time |
| 16, 17 | COMP / VFB | VFB is feedback input (0.6V reference); COMP is error amplifier output (tie to SGND if FS = VIN) |
| 18 | SGND | Signal ground reference for feedback, compensation, and logic pins; separate from PGND at single point |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | P- and N-channel FETs with RDS(on) ≤45mΩ/35mΩ (VIN=5V) minimize external component count and conduction loss |
| 100% Duty-Cycle Operation | Enables <200mV dropout at 6A, supporting low-VIN–VOUT applications like Li-ion battery post-regulation |
| Pre-Biased Output Start-Up | Allows safe startup into existing output voltage without reverse current or overshoot-critical for hot-swap systems |
| Phase Interleaving Support | Synchronized multi-chip operation reduces input RMS current and output voltage ripple by √N (N = number of phases) |
| Margining Capability | VSET pin enables ±10% output voltage adjustment (via VIN/SGND/floating) for system-level validation and margin testing |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Point-of-load conversion in compact server mezzanine cards requiring stable 1.2V core supply under dynamic load steps. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 1.2V at up to 6A with <1ms soft-start and hiccup-mode fault recovery. Use Value: 97% efficiency at mid-load minimizes thermal footprint; 100% duty-cycle extends usable input range down to 1.4V headroom. | Use Scenario: Core voltage supply for Xilinx Artix-7 FPGA banks where tight regulation (±1%) and fast transient response are mandatory. IC Role / Device Role / Timing Role: Fixed-output buck controller with pre-bias start-up and reverse current protection to prevent back-driving during partial reconfiguration. Use Value: ±1% output accuracy over temperature ensures reliable logic margining; PFM mode cuts no-load IQ to 70µA for standby power optimization. |
| Plug-in DC/DC Modules for Routers and Switchers | Li-ion Battery Powered Devices |
Use Scenario: Hot-pluggable 12V-to-1.2V module in enterprise Ethernet switches needing EMI-controlled switching and board-level synchronization. IC Role / Device Role / Timing Role: Master-synced buck regulator using SYNCIN/SYNCOUT to phase-align with adjacent modules and suppress beat frequencies. Use Value: Adjustable 500kHz–4MHz frequency avoids noise bands; phase interleaving cuts input capacitor RMS current by 30% vs single-phase. | Use Scenario: Main SoC core rail in handheld test equipment powered by single-cell Li-ion (3.0V–4.2V nominal). IC Role / Device Role / Timing Role: High-efficiency step-down regulator with UVLO (2.7V) and thermal shutdown (150°C) for battery safety and runtime extension. Use Value: 97% peak efficiency at 3.6VIN/1.2VOUT/3A maximizes usable battery energy; soft-stop discharge prevents residual voltage on shutdown. |
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, 2.95–17V input, adjustable output only; no fixed 1.2V variant; higher min input voltage | Requires external resistor divider; unsuitable for sub-2.95V inputs like Li-ion discharge tail | Select when wider input range or higher VIN tolerance is required; not drop-in for ISL8016IR12Z's fixed 1.2V footprint |
| RTQ2132BGQW | 6A, 2.7–6V input, fixed 1.2V option available; integrated compensation; lower IQ (35µA) | Smaller 3x3 QFN package; no phase interleaving or SYNCOUT; different pinout and layout | Choose for ultra-low-quiescent designs where synchronization and multi-phase scaling are unnecessary |
Compared with TPS54620RGYT and RTQ2132BGQW, the ISL8016IR12Z uniquely combines fixed 1.2V output, 2.7V minimum input, phase-interleaving capability, and pre-bias start-up-making it optimal for FPGA core rails in battery-powered or thermally constrained systems where layout reuse and deterministic startup behavior are critical.
Availability
ISL8016IR12Z is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power delivery, and Li-ion battery-powered devices requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for ISL8016IR12Z 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.
The ISL8016 product line was designed specifically for high-current, low-voltage point-of-load regulation in portable instrumentation, telecom infrastructure, and FPGA-based embedded systems demanding high efficiency, small footprint, and robust protection.
FAQ
What is the output voltage tolerance of the ISL8016IR12Z over temperature and load?
The ISL8016IR12Z delivers a fixed 1.2V output with ±1% tolerance over the full operating range of -40°C to +85°C ambient temperature, line (2.7V–5.5V VIN), and load (0–6A). This specification is verified in the datasheet (FN7616, p.7, VVFB parameter) and applies to the ISL8016IR12Z variant specifically-not derived from adjustable versions.
Does the ISL8016IR12Z support synchronization with other buck regulators?
Yes, the ISL8016IR12Z supports external synchronization from 500kHz to 4MHz via the SYNCIN pin and provides a 250µA current-source SYNCOUT signal for driving slave devices. Phase shifting between master and slave is achievable using a capacitor (e.g., 100pF) between SYNCOUT and SYNCIN, enabling interleaved operation to reduce input/output ripple-confirmed in Figure 3 and Equation 2 of FN7616.
Can the ISL8016IR12Z start up into a pre-biased output voltage?
Yes, the ISL8016IR12Z supports pre-biased start-up, allowing safe turn-on when the output already holds a voltage (e.g., during hot-swap or partial system reset). This feature prevents reverse current flow and output overshoot, and is explicitly documented in the datasheet's "Features" list and "Theory of Operation" section (FN7616, pp.1–2, 15).
What is the maximum junction temperature and thermal resistance of the ISL8016IR12Z package?
The ISL8016IR12Z uses a 20-lead 3x4 QFN package with θJA = 42°C/W (typical, free-air) and θJC = 5°C/W (typical, case-to-junction). Its absolute maximum junction temperature is +125°C, and thermal shutdown activates at +150°C with 25°C hysteresis-data confirmed in the "Thermal Information" table on page 7 of FN7616.
How does the ISL8016IR12Z handle overcurrent faults?
The ISL8016IR12Z implements cycle-by-cycle peak current limiting and hiccup-mode recovery: upon detecting 17 consecutive overcurrent events (e.g., short circuit), it shuts down and attempts automatic restart after eight soft-start periods. This behavior-documented in "Overcurrent Protection" (p.16) and "Analog Specifications" (p.8, tOCOFF)-ensures safe fault containment while preserving the ISL8016IR12Z's reliability in unattended systems.
ISL8016IR12Z 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):
- 1.2V
- 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)
ISL8016IR12Z FAQ
1.How can I place an order for ISL8016IR12Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IR12Z 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 ISL8016IR12Z reliable?
The price and inventory of ISL8016IR12Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IR12Z is usually 5 days.
3.What payment methods are accepted for ISL8016IR12Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IR12Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IR12Z?
ISL8016IR12Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IR12Z 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 ISL8016IR12Z?
For technical support, including ISL8016IR12Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IR12Z requirements.
6.How does Aetrix verify that ISL8016IR12Z is sourced from the original manufacturer or authorized distributors?
All ISL8016IR12Z 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 ISL8016IR12Z meets industry standards.
7.What is the process for return or replacement of ISL8016IR12Z?
All ISL8016IR12Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IR12Z, 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 ISL8016IR12Z part is unused and in its original packaging.
Return procedure for ISL8016IR12Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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