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Renesas ISL8014IRZ
- Part No.:
- ISL8014IRZ
- Manufacturer:
- Renesas
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL8014IRZ.pdf
- Description:
- IC REG BUCK ADJ 4A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,162
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Product details
Overview
ISL8014IRZ from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 4A continuous output current from a 2.7V–5.5V input, featuring 1MHz PWM switching, 35µA quiescent current in PFM mode, and integrated 50mΩ P- and N-channel MOSFETs. It serves as a high-efficiency point-of-load (POL) power supply for microcontrollers, FPGAs, and battery-powered portable instruments.
For engineers reviewing the ISL8014IRZ datasheet, ISL8014IRZ pinout, ISL8014IRZ application, or ISL8014IRZ equivalent, key selection criteria include its 100% duty-cycle capability for ultra-low dropout, programmable PFM/PWM mode selection via SYNCH pin, Power-Good timing accuracy, and thermal shutdown at 140°C with 25°C hysteresis.
Technical Context
The ISL8014IRZ employs current-mode PWM control with internal slope compensation and a 200mV/A current-sense gain, enabling fast transient response and stable loop behavior across load and line variations. Its dual-mode operation-forced PWM for low-noise applications and PFM for light-load efficiency-supports pre-biased start-up and soft-stop output discharge.
Protection architecture includes hiccup-mode overcurrent limiting triggered after 17 consecutive fault cycles, output overvoltage detection (92% nominal threshold), short-circuit protection via VFB monitoring (<0.2V), and thermal shutdown with automatic recovery at 115°C. The 1ms Power-Good delay is implemented with internal timing circuitry independent of external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, and intermediate bus rails without external LDO pre-regulation. |
| Output Current | 4A continuous - enables direct powering of high-current digital loads like FPGA core rails or DSP I/O banks. |
| Switching Frequency | 1MHz (typical), up to 4MHz sync-capable - allows use of compact 1.5µH inductors and minimizes EMI through out-of-phase synchronization. |
| Quiescent Current | 35µA in PFM mode - extends battery life in always-on portable instrumentation with light-load standby requirements. |
| Reference Voltage | 0.8V ±2.5% - sets output accuracy baseline; combined with 3% total regulation error ensures ±30mV stability at 1V output. |
| Duty Cycle Range | 0–100% - enables near-zero dropout operation (e.g., <400mV at 4A) when input approaches output voltage, critical for end-of-battery-life operation. |
| Thermal Shutdown | 140°C activation with 25°C hysteresis - provides robust thermal margin while avoiding nuisance shutdowns during transient power bursts. |
Pinout & Package
The ISL8014IRZ is housed in a RoHS-compliant, lead-free 16-lead 4mm × 4mm QFN package with exposed thermal pad, optimized for low θJA (39°C/W) and θJC (3°C/W) performance. The exposed pad must be soldered to SGND for electrical integrity and thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Power input supply | Accepts 2.7–5.5V; requires local 10µF ceramic decoupling to PGND to suppress high-frequency switching noise. |
| 3 VDD | Analog supply rail | Internally tied to VIN; powers bandgap reference and error amplifier-no separate bypass needed. |
| 4 SYNCH | Mode control / sync input | Logic-high = forced PWM; logic-low = PFM; external clock edge-triggered sync up to 4MHz with 140ns min on-time constraint. |
| 5 EN | Enable control | Active-high logic input; drives internal discharge switch during disable to safely collapse pre-biased outputs. |
| 7 PG | Power-Good status | Open-drain output with 1ms delay after regulation achieved; sinks 1mA max at 0.3V low-level for system sequencing. |
| 8 VFB | Feedback node | Connects to resistor divider for adjustable output; 0.1µA bias current enables precise 0.8V reference tracking. |
| 14, 15 LX | Switch node | Drives external inductor; integrates 50mΩ P- and N-MOSFETs-requires low-inductance layout to minimize ringing and EMI. |
| 11, 12 PGND | Power ground return | High-current return path for MOSFETs and inductor; must be separated from SGND except at single-point connection under exposed pad. |
| 9, 10 SGND | Signal ground reference | Reference for VFB, EN, PG, SYNCH; connects directly to exposed pad vias for optimal noise immunity and thermal path. |
| 6, 13, 16 NC | No-connect terminals | Not internally bonded; must remain unconnected per datasheet-no routing or copper fill allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 50mΩ P- and N-channel switches reduce BOM count and PCB area; eliminate gate-drive complexity and external driver losses. |
| 100% Duty-Cycle Operation | Enables dropout <400mV at 4A, extending usable battery range in Li-ion systems down to ~0.85×VOUT. |
| Internal Soft-Start | 1ms controlled ramp prevents inrush current and overshoot during power-up-even with pre-biased output voltages. |
| Programmable Light-Load Mode | Selectable PFM (35µA IQ) or forced PWM via SYNCH pin-optimizes efficiency/noise trade-off without changing hardware. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault counter and auto-restart after four soft-start periods prevent thermal runaway during sustained overload or short-circuit events. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, board-mounted DC/DC converter supplying regulated 1.2V/1.8V rails in space-constrained SFP modules and router line cards. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise core voltage with fast transient response to dynamic load steps. Use Value: 4A output capacity and 1MHz switching enable sub-0.4in² footprint; PFM mode maintains >85% efficiency at 10mA load for low-idle power consumption. | Use Scenario: Core power delivery for ARM-based microcontrollers and Xilinx Artix-7 FPGAs in portable test equipment requiring stable 1.0V–1.8V supplies. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with soft-start and pre-bias support ensuring glitch-free boot and deterministic reset sequencing. Use Value: 35µA quiescent current extends battery runtime in handheld instruments; 100% duty cycle sustains operation until battery drops to 0.95×VOUT. |
| Li-ion Battery Powered Devices | Portable Instruments |
Use Scenario: Power management in barcode scanners and handheld medical sensors operating from single-cell Li-ion (2.7–4.2V). IC Role / Device Role / Timing Role: Main system regulator converting variable battery voltage to fixed 3.3V I/O rail and 1.8V logic rail with seamless transition across battery discharge curve. Use Value: 100% duty cycle delivers <400mV dropout at full load, enabling functional operation down to 3.0V battery voltage; thermal shutdown prevents damage during enclosure overheating. | Use Scenario: Embedded power solution in portable oscilloscopes and multimeters requiring low-noise analog supply and reliable startup under varying input conditions. IC Role / Device Role / Timing Role: Dual-rail POL converter supporting both precision analog sections (via low-ripple PWM) and digital subsystems (via efficient PFM). Use Value: Selectable PFM/PWM mode reduces conducted EMI during sensitive measurements while maintaining >95% peak efficiency at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8014A | Pin-compatible revision with improved current limit accuracy and tighter VREF tolerance (±1% vs ±2.5%). | Preferred for new designs requiring enhanced output voltage stability over temperature and load. | Direct replacement with identical footprint and pinout; no layout changes required. |
| TPS54331DR | 3A output, 5.5–36V input, external MOSFETs; higher input range but lower current and no integrated high-side FET. | Suitable for industrial 12V/24V intermediate bus applications where input exceeds 5.5V. | Requires redesign of power stage and compensation network; not drop-in compatible. |
Compared with ISL8014IRZ, the ISL8014A offers tighter regulation and updated protection thresholds while maintaining full compatibility, whereas the TPS54331DR trades integration for wider input range and external flexibility-making it viable only when input voltage exceeds 5.5V or higher reliability qualification is mandated.
Availability
ISL8014IRZ 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 throughout design-in, prototyping, and volume production phases.
Supply support for ISL8014IRZ 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 Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, formed through the acquisition of Intersil in 2017.
The ISL8014IRZ belongs to Renesas' high-efficiency DC/DC converter product line, engineered specifically for space-constrained, battery-sensitive applications demanding low quiescent current, fast transient response, and robust fault protection in portable and embedded systems.
FAQ
What is the maximum output current capability of the ISL8014IRZ?
The ISL8014IRZ delivers up to 4A continuous output current under recommended operating conditions (TA = –40°C to +85°C, VIN = 3.6V). Peak switch current is limited to 6.0A (typical), with hiccup-mode protection engaging after sustained overcurrent. Thermal derating applies above 85°C ambient; full 4A output requires adequate PCB copper area and thermal vias under the exposed pad.
Does the ISL8014IRZ support pre-biased output startup?
Yes, the ISL8014IRZ supports pre-biased output startup. During soft-start, the IC operates in SKIP mode and actively controls the upper MOSFET to avoid reverse current flow into a pre-charged output capacitor. This behavior is confirmed in Figures 24–26 of the FN6576 datasheet and enables safe power sequencing in multi-rail systems where output voltages may already be present.
How does the SYNCH pin configure PFM versus PWM operation on the ISL8014IRZ?
The SYNCH pin configures operating mode as follows: logic-low (<0.4V) forces discontinuous conduction mode (PFM) for ultra-low quiescent current (35µA); logic-high (>2.5V) forces continuous conduction mode (PWM) for constant frequency and reduced EMI. Leaving SYNCH floating is prohibited-external pull-up or pull-down is mandatory per Pin Descriptions on page 2 of FN6576.
What is the purpose and timing accuracy of the PG (Power-Good) output on the ISL8014IRZ?
The PG output on the ISL8014IRZ provides a 1ms delayed open-drain signal indicating that VOUT has reached regulation. Its rising-edge delay is specified as 0.65–1.35ms, with falling-edge delay of 15µs. The PG pin asserts high only when VFB reaches 92% of nominal regulation (e.g., 0.736V for 0.8V reference), making it suitable for processor reset sequencing and system power-good monitoring.
Can the ISL8014IRZ be synchronized to an external clock, and what are the constraints?
Yes, the ISL8014IRZ supports external synchronization up to 4MHz via the SYNCH pin, triggered on the falling edge. Critical constraints include minimum LX on-time ≥140ns and external clock duty cycle between 30–70%. Synchronization eliminates beat frequencies in multi-phase systems and reduces input/output ripple when multiple ISL8014IRZ units operate out-of-phase-verified in Figure 30 and Application Information section.
ISL8014IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 4A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
ISL8014IRZ FAQ
1.How can I place an order for ISL8014IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8014IRZ 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 ISL8014IRZ reliable?
The price and inventory of ISL8014IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8014IRZ is usually 5 days.
3.What payment methods are accepted for ISL8014IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8014IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8014IRZ?
ISL8014IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8014IRZ 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 ISL8014IRZ?
For technical support, including ISL8014IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8014IRZ requirements.
6.How does Aetrix verify that ISL8014IRZ is sourced from the original manufacturer or authorized distributors?
All ISL8014IRZ 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 ISL8014IRZ meets industry standards.
7.What is the process for return or replacement of ISL8014IRZ?
All ISL8014IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8014IRZ, 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 ISL8014IRZ part is unused and in its original packaging.
Return procedure for ISL8014IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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