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Renesas ISL8014IRZ-T
- Part No.:
- ISL8014IRZ-T
- Manufacturer:
- Renesas
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL8014IRZ-T.pdf
- Description:
- IC REG BUCK ADJ 4A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,319
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Product details
Overview
ISL8014IRZ-T 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-T datasheet, ISL8014IRZ-T pinout, ISL8014IRZ-T application, or ISL8014IRZ-T equivalent, key selection criteria include its 100% duty-cycle capability for ultra-low dropout, selectable PWM/PFM operation, internal soft-start with 1ms ramp, Power-Good timing, and thermal/overcurrent hiccup-mode protection.
Technical Context
The ISL8014IRZ-T employs current-mode control with slope compensation for fast transient response and loop stability across 0–4A load range. Its dual-MOSFET architecture supports 100% duty cycle, enabling sub-400mV dropout at 4A, while internal compensation eliminates external compensation components.
It features dual operating modes: forced PWM for low-noise/low-EMI applications and PFM for ultra-low quiescent current (35µA) at light loads. Synchronization up to 4MHz via the SYNCH pin allows phase interleaving of multiple converters to reduce input/output ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, and 3.3V/5V rail inputs without pre-regulation. |
| Output Current | Up to 4A continuous - sufficient for powering core logic of mid-tier FPGAs and application processors. |
| Switching Frequency | 1MHz (adjustable up to 4MHz via SYNC) - enables use of compact 1.5µH inductors and small ceramic capacitors. |
| Quiescent Current | 35µA in PFM mode - extends battery runtime in always-on portable instrumentation. |
| Reference Voltage | 0.8V ±2.5% - sets output accuracy baseline; combined with 3% total output regulation over line/load/temp. |
| Power-Good Delay | 1ms fixed delay - provides deterministic system reset timing after output stabilization. |
| Thermal Shutdown | 140°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
ISL8014IRZ-T is housed in a RoHS-compliant, thermally enhanced 16-lead 4mm × 4mm QFN package with exposed pad (PKG DWG L16.4x4), requiring connection of the exposed pad to SGND for optimal electrical and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Input power supply | Accepts 2.7–5.5V; requires local 10µF ceramic decoupling to PGND. |
| 3 VDD | Analog supply rail | Must be tied directly to VIN; powers internal bandgap and error amplifier. |
| 4 SYNCH | Mode control & sync input | Logic-high = forced PWM; logic-low = PFM; external clock edge-triggered sync up to 4MHz. |
| 5 EN | Enable/disable control | Active-high; drives internal discharge switch during shutdown to safely collapse output voltage. |
| 7 PG | Open-drain Power-Good | Asserts high after 1ms delay once VOUT reaches 92% of regulation; sinks ≥1mA. |
| 8 VFB | Feedback input | Connects to resistor divider; regulates output to 0.8V reference; bias current <0.1µA. |
| 14, 15 LX | Switch node | Drives external inductor; supports ≤140ns minimum on-time at 4MHz sync. |
| 11, 12 PGND | Power ground | High-current return path for MOSFETs and inductor; separate from SGND for noise isolation. |
| 9, 10 SGND | Signal ground | Reference for VFB, EN, PG, SYNCH; exposed pad must connect here for stability. |
| 6, 13, 16 NC | No-connect | Not internally bonded; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 50mΩ P- and N-channel switches - eliminate external FETs and gate drivers, reducing BOM count and layout area. |
| 100% Duty Cycle | Enables <400mV dropout at 4A - extends usable battery voltage range down to ~0.8V above output. |
| Internal Soft-Start | 1ms controlled ramp - prevents inrush current and overshoot during startup, even with pre-biased outputs. |
| Soft-Stop Discharge | Internal 100Ω switch discharges output capacitor on disable - ensures safe sequencing in multi-rail systems. |
| Hiccup-Mode OCP | 17-cycle fault counter with 4-soft-start-cycle restart delay - limits power dissipation during sustained short-circuit events. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, board-mounted DC/DC conversion for distributed power in telecom line cards and industrial controllers. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 0.8–3.3V at up to 4A with minimal external components. Use Value: 97% peak efficiency and 35µA quiescent current enable high-density, thermally constrained POL designs. | Use Scenario: Core and I/O power for embedded microprocessors and mid-range FPGAs in portable test equipment. IC Role / Device Role / Timing Role: High-accuracy (±3%) voltage source with 1ms Power-Good assertion for reliable processor boot sequencing. Use Value: Internal soft-start and pre-bias startup support ensure glitch-free initialization under varying load conditions. |
| Li-ion Battery Powered Devices | Small Form Factor (SFP) Modules |
Use Scenario: Power management in handheld meters, barcode scanners, and portable medical sensors. IC Role / Device Role / Timing Role: Main system regulator operating from 2.7–4.2V battery range with 100% duty-cycle extension. Use Value: 35µA PFM quiescent current maximizes battery life in sleep/idle states without sacrificing transient response. | Use Scenario: Space-constrained optical transceiver modules requiring regulated 3.3V or 1.8V rails. IC Role / Device Role / Timing Role: Ultra-small footprint (0.4in² total solution) synchronous buck converter with thermal-aware shutdown. Use Value: 4×4mm QFN package with exposed pad meets strict height (<1mm) and thermal requirements of SFP+ MSA. |
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 drop-in replacement with improved thermal performance and updated ESD rating; same 4A rating and 1MHz base frequency. | Recommended for new designs; supports same PCB layout but offers longer product lifecycle and enhanced reliability. | Select ISL8014A when designing new systems or refreshing legacy boards where long-term availability is critical. |
| TPS54331DR | 3A rated, 5.5–28V input, 500kHz–2.5MHz adjustable frequency; no internal P-MOSFET (requires external high-side switch). | Better suited for higher-input-voltage industrial applications; lacks 100% duty cycle and PFM ultra-low IQ mode. | Choose TPS54331DR only if input exceeds 5.5V or if external MOSFET control is required; not a functional substitute for ISL8014IRZ-T's low-VIN, high-efficiency profile. |
Compared with ISL8014IRZ-T, the ISL8014A offers identical functionality with enhanced manufacturability and longevity, while the TPS54331DR trades integration and low-VIN capability for wider input range and external FET flexibility-making it unsuitable for direct replacement in battery-powered or space-constrained 2.7–5.5V applications.
Availability
ISL8014IRZ-T 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 and proven thermal performance in compact footprints.
Supply support for ISL8014IRZ-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 maintains its high-performance analog and power management portfolio for industrial, computing, and communications markets.
The ISL8014IRZ-T belongs to Renesas' ISL80xx family of monolithic synchronous buck regulators, designed specifically for efficient, low-noise, and space-constrained point-of-load power in portable and embedded systems.
FAQ
What is the maximum continuous output current supported by the ISL8014IRZ-T?
The ISL8014IRZ-T delivers up to 4A continuous output current across its full operating temperature range (-40°C to +85°C) when properly heatsinked using the exposed pad connected to SGND. Peak switch current limit is 6.0A (typical), with hiccup-mode protection engaging above 7.1A to prevent damage during overload or short-circuit conditions. The ISL8014IRZ-T achieves this with integrated 50mΩ P- and N-channel MOSFETs and optimized thermal design in its 4×4mm QFN package.
Does the ISL8014IRZ-T support pre-biased output startup?
Yes, the ISL8014IRZ-T supports pre-biased output startup. During soft-start, the IC operates in SKIP mode and uses a reduced switching frequency (1/3 nominal) to gently ramp the output without forcing reverse current into a pre-charged rail. This behavior is explicitly confirmed in the datasheet's Theory of Operation section and validated in Figure 26 (Soft-Start with Pre-Biased 1V). The ISL8014IRZ-T's ability to start into a pre-biased output makes it suitable for hot-swap and multi-rail sequencing applications.
What is the purpose of the SYNCH pin on the ISL8014IRZ-T?
The SYNCH pin on the ISL8014IRZ-T serves three distinct functions: (1) logic-high (>2.5V) forces continuous PWM mode; (2) logic-low (<0.4V) enables pulse-skipping (PFM) mode for ultra-low quiescent current; and (3) accepts external clock signals (up to 4MHz) synchronized on the falling edge to coordinate switching phase with other converters. This pin directly controls operating mode and enables ripple reduction via out-of-phase synchronization-critical for multi-phase POL designs. The ISL8014IRZ-T's SYNCH pin does not require pull-up/down resistors but must never be left floating.
How does the ISL8014IRZ-T handle overcurrent and short-circuit conditions?
The ISL8014IRZ-T implements dual-layer protection: peak current limiting trips the upper MOSFET when sensed switch current reaches 5.7A (1.4V CSA threshold), and hiccup-mode recovery initiates after 17 consecutive overcurrent detections. During short-circuit events, the SCP comparator monitors VFB and reduces oscillator frequency to 1/3 normal if VFB drops below 0.2V. The ISL8014IRZ-T then attempts automatic restart after four soft-start cycles (~4ms total), limiting average power dissipation and preventing thermal runaway without requiring external circuitry.
Is the ISL8014IRZ-T still recommended for new designs?
No-the ISL8014IRZ-T is marked "NOT RECOMMENDED FOR NEW DESIGNS" in the official datasheet (FN6576 Rev 4.00), with the ISL8014A specified as the recommended replacement. While ISL8014IRZ-T remains available for legacy support and existing production, new designs should use the ISL8014A, which offers identical pinout, electrical specifications, and enhanced manufacturing robustness including improved ESD tolerance and extended lifecycle assurance. Aetrix Electronics stocks both variants to support design transitions and obsolescence management.
ISL8014IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for ISL8014IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8014IRZ-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 ISL8014IRZ-T reliable?
The price and inventory of ISL8014IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8014IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8014IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8014IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8014IRZ-T?
ISL8014IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8014IRZ-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 ISL8014IRZ-T?
For technical support, including ISL8014IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8014IRZ-T requirements.
6.How does Aetrix verify that ISL8014IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8014IRZ-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 ISL8014IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8014IRZ-T?
All ISL8014IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8014IRZ-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 ISL8014IRZ-T part is unused and in its original packaging.
Return procedure for ISL8014IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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