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Renesas ISL8014AIRZ-T
- Part No.:
- ISL8014AIRZ-T
- Manufacturer:
- Renesas
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL8014AIRZ-T.pdf
- Description:
- IC REG BUCK ADJ 4A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:15,968
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Product details
Overview
ISL8014AIRZ-T from Renesas Electronics is a monolithic synchronous buck regulator delivering up to 4A continuous output current from a 2.8V–5.5V input, featuring 1MHz PWM switching, 97% peak efficiency, 0.8V reference voltage, and integrated P/N-channel MOSFETs with ≤75mΩ ON-resistance. It powers microcontrollers, FPGAs, and DSPs in space-constrained portable instruments and Li-ion battery systems.
For engineers reviewing the ISL8014AIRZ-T datasheet, ISL8014AIRZ-T pinout, ISL8014AIRZ-T application, or ISL8014AIRZ-T equivalent, key selection criteria include its 1ms power-good delay, 35µA quiescent current in PFM mode, 100% duty-cycle operation for ultra-low dropout, selectable forced-PWM/PSM modes, and synchronization capability up to 4MHz.
Technical Context
The ISL8014AIRZ-T employs current-mode control with internal slope compensation and a transconductance error amplifier (20µA/V) for fast transient response and stable loop behavior across load and line variations. Its dual-mode operation-forced continuous PWM for low-noise applications and discontinuous PFM for light-load efficiency-enables adaptive power management in battery-powered systems.
Protection architecture includes hiccup-mode overcurrent limiting (trip at 4.9–7.1A), thermal shutdown at 140°C with 25°C hysteresis, output overvoltage detection (92% nominal threshold), and soft-stop output discharge via internal 100Ω switch during shutdown. The 1ms PG timer ensures reliable system sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 5.5V - supports single-cell Li-ion, USB, and intermediate bus rails without external LDO pre-regulation. |
| Output Current | Up to 4A continuous - sufficient for core logic rails of modern µC/FPGA/DSP loads. |
| Switching Frequency | 0.8–1.2MHz (typ. 1MHz) - enables compact 1.5µH inductors and 2×22µF ceramic output capacitors. |
| Reference Voltage | 0.8V ±10mV - sets precise output regulation point; adjustable via external resistor divider. |
| Quiescent Current | 35µA in PFM mode - extends battery life in always-on or low-duty-cycle portable instrumentation. |
| Power-Good Delay | 1ms after regulation - provides deterministic timing for downstream reset assertion and system boot sequencing. |
| Duty Cycle Range | 0–100% - allows operation down to <400mV dropout at 4A, critical for end-of-battery-life support. |
| Shutdown Current | <2µA - minimizes standby leakage in powered-off subsystems. |
Pinout & Package
ISL8014AIRZ-T is housed in a RoHS-compliant, thermally enhanced 16-lead 4mm × 4mm QFN package with exposed pad (L16.4x4 drawing). The exposed pad must be soldered to SGND for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Input power supply | Primary DC input connection; requires local 10µF ceramic decoupling to PGND. |
| 3 VDD | Analog supply rail | Bias for internal bandgap and control circuitry; tied directly to VIN. |
| 4 SYNCH | Mode selection/synchronization | Logic-high = forced PWM; logic-low = PFM; external clock edge-triggered sync up to 4MHz. |
| 5 EN | Enable control | Active-high logic input; initiates soft-start on rising edge and discharges output capacitor on falling edge. |
| 7 PG | Power-good indicator | Open-drain output asserting high after 1ms delay once VOUT reaches 92% of regulation. |
| 8 VFB | Feedback input | Connects to resistor divider; senses output voltage relative to 0.8V internal reference. |
| 14, 15 LX | Switch node | Drives external inductor; connects internally to source of P-MOSFET and drain of N-MOSFET. |
| 11, 12 PGND | Power ground | High-current return path for switching loop; separate from signal ground to minimize noise coupling. |
| 9, 10 SGND | Signal ground | Reference for analog blocks (error amp, comparators); connected to exposed pad for thermal/electrical integrity. |
| 6, 13, 16 NC | No connect | Unbonded pins; must remain unconnected per design specification. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-MOSFETs | ≤75mΩ combined ON-resistance at 5V VIN - eliminates external power switches and reduces BOM count and layout area. |
| 100% Duty-Cycle Operation | Enables <400mV dropout at 4A - sustains regulated output as input voltage collapses near battery depletion. |
| Pre-biased Output Start-up | Supports hot-swap and rail sequencing - prevents reverse current flow when output capacitor is pre-charged. |
| Internal Soft-Start | 1ms controlled ramp - limits inrush current and avoids overshoot during power-up across all load conditions. |
| External Synchronization | Accepts negative-edge-triggered clock up to 4MHz - eliminates beat frequencies in multi-rail systems and simplifies EMI filtering. |
| Soft-Stop Output Discharge | Internal 100Ω switch actively pulls VOUT to SGND during shutdown - ensures safe state transition and prevents floating outputs. |
Applications
| DC/DC POL Modules | µC/µP, FPGA & DSP Power |
|---|---|
Use Scenario: Point-of-load conversion in compact telecom modules requiring high-density, low-profile power delivery. IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating core voltage (e.g., 1.2V/1.8V) from 3.3V or 5V intermediate bus. Use Value: 4A capability and 1MHz switching enable sub-0.4in² footprint while maintaining >95% efficiency at full load. | Use Scenario: Core power supply for ARM-based microcontrollers and Xilinx Artix-7 FPGAs in portable test equipment. IC Role / Device Role / Timing Role: Main processor rail regulator with precise 0.8V reference and tight 3% output accuracy over temperature/load/line. Use Value: 35µA quiescent current in PFM mode extends battery runtime between measurements without sacrificing transient response. |
| Li-ion Battery Powered Devices | Small Form Factor (SFP) Modules |
Use Scenario: Power management in handheld barcode scanners operating from single-cell Li-ion (2.8–4.2V). IC Role / Device Role / Timing Role: Single-stage buck converter delivering 3.3V or 1.8V output with 100% duty-cycle support for end-of-discharge operation. Use Value: Ultra-low dropout (<400mV @ 4A) maintains regulation down to 2.8V input, maximizing usable battery capacity. | Use Scenario: Compact optical transceiver power in SFP+ pluggable modules where board space and thermal envelope are constrained. IC Role / Device Role / Timing Role: Secondary rail generator for laser driver bias or serializer/deserializer I/O supplies. Use Value: 4mm × 4mm QFN package with exposed pad achieves <3°C/W θJC - critical for conduction-cooled module designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS544B20RJER | Higher 4.5A rating, 2.5–18V input, no PFM mode, requires external compensation. | Better suited for wide-input industrial rails; lacks ultra-low IQ for battery longevity. | Select if input exceeds 5.5V or higher current margin is required; avoid for Li-ion portable use due to 100µA IQ. |
| MP2315GJ-Z | 3A rating, 4.5–28V input, fixed 0.8V reference, no sync input, lower cost QFN. | Targeted at cost-sensitive non-battery applications; no soft-stop discharge or pre-bias start-up. | Choose for fixed-output 3.3V/5V rails in routers or PoE devices; not recommended for sequenced or battery-backed systems. |
Compared with TPS544B20RJER and MP2315GJ-Z, the ISL8014AIRZ-T uniquely balances 4A capability, 35µA PFM quiescent current, 100% duty cycle, and integrated soft-stop discharge - making it optimal for space- and energy-constrained portable electronics where battery life and safe power sequencing are critical.
Availability
ISL8014AIRZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power supplies, and Li-ion battery-powered devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8014AIRZ-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 is a global semiconductor leader specializing in microcontrollers, analog power management, and timing solutions for automotive, industrial, and infrastructure markets.
The ISL8014AIRZ-T belongs to Renesas' ISL801xA family of high-efficiency synchronous buck regulators designed specifically for portable, battery-operated, and space-constrained embedded systems demanding low IQ, fast transient response, and robust protection.
FAQ
What is the maximum continuous output current supported by the ISL8014AIRZ-T?
The ISL8014AIRZ-T delivers up to 4A continuous output current across the full operating temperature range (-40°C to +85°C) when properly heatsinked using the exposed pad. Peak current limit is specified at 4.9–7.1A, with hiccup-mode protection engaging under sustained overload or short-circuit conditions. Derating applies above +85°C ambient per thermal resistance data (θJA = 39°C/W).
Does the ISL8014AIRZ-T support pre-biased output start-up?
Yes, the ISL8014AIRZ-T supports pre-biased output start-up. During soft-start, the IC operates in SKIP mode and prevents reverse current flow into the output capacitor, enabling safe power sequencing in systems where the output rail may already be charged. This feature is confirmed in the datasheet's Theory of Operation section and validated in Figure 24 (Soft-Start with Pre-Biased 1V).
What is the purpose of the exposed pad on the ISL8014AIRZ-T QFN package?
The exposed pad on the ISL8014AIRZ-T must be soldered to the SGND plane using multiple thermal vias. It serves two critical functions: (1) providing low-thermal-resistance path (θJC = 3°C/W) to dissipate heat from internal MOSFETs, and (2) establishing a low-inductance signal ground reference for analog circuitry including the error amplifier and comparators - essential for stability and noise immunity.
How does the ISL8014AIRZ-T handle overcurrent and short-circuit conditions?
The ISL8014AIRZ-T uses peak current limiting with hiccup-mode recovery: upon detecting 17 consecutive overcurrent events (at ≥4.9A), it shuts down and attempts automatic restart after four soft-start delays. For short circuits, the SCP comparator monitors VFB and reduces switching frequency to 1/3 normal rate when VFB drops below 0.2V - reducing power dissipation while maintaining fault detection. Both protections are fully internal and require no external components.
Can the ISL8014AIRZ-T be synchronized to an external clock, and what are the timing constraints?
Yes, the ISL8014AIRZ-T accepts external synchronization up to 4MHz on the SYNCH pin, triggered by the falling edge. To ensure reliable operation, the minimum on-time at the LX node must exceed 140ns - which constrains the lowest usable input-to-output voltage ratio at high sync frequencies. This constraint is explicitly stated in the datasheet's Synchronization Control section on page 13.
ISL8014AIRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN 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):
- 2.8V
- 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)
ISL8014AIRZ-T FAQ
1.How can I place an order for ISL8014AIRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8014AIRZ-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 ISL8014AIRZ-T reliable?
The price and inventory of ISL8014AIRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8014AIRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8014AIRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8014AIRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8014AIRZ-T?
ISL8014AIRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8014AIRZ-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 ISL8014AIRZ-T?
For technical support, including ISL8014AIRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8014AIRZ-T requirements.
6.How does Aetrix verify that ISL8014AIRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8014AIRZ-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 ISL8014AIRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8014AIRZ-T?
All ISL8014AIRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8014AIRZ-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 ISL8014AIRZ-T part is unused and in its original packaging.
Return procedure for ISL8014AIRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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