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Renesas ISL8016IR25Z-T
- Part No.:
- ISL8016IR25Z-T
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IR25Z-T.pdf
- Description:
- IC REG BUCK 2.5V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,448
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Product details
Overview
ISL8016IR25Z-T from Renesas Electronics (formerly Intersil) is a monolithic synchronous buck DC/DC regulator delivering up to 6A continuous output current with 2.5V fixed output voltage, 2.7V–5.5V input range, and 97% peak efficiency. It integrates high- and low-side MOSFETs, supports adjustable frequency (500kHz–4MHz), and features reverse current protection, pre-bias start-up, and overtemperature shutdown - deployed in FPGA and µP core power rails.
For engineers reviewing the ISL8016IR25Z-T datasheet, ISL8016IR25Z-T pinout, ISL8016IR25Z-T application, or ISL8016IR25Z-T equivalent, key selection criteria include its 2.5V ±1% output accuracy over temperature/load/line, 100% duty-cycle capability for <200mV dropout at 6A, phase-interleaving support for >6A configurations, and PFM/PWM mode selection via SYNCIN logic level.
Technical Context
The ISL8016IR25Z-T employs current-mode PWM control with slope compensation (360mV/Ts) and a transconductance error amplifier (100µA/V internal, 200µA/V external) for fast transient response and loop stability. Its dual-MOSFET architecture uses P-channel (45mΩ typ @ 5V) and N-channel (35mΩ typ @ 5V) switches integrated into a single die.
It implements programmable overcurrent protection with three ISET-configurable peak limits (6A default), hiccup-mode short-circuit recovery, and zero-cross detection for PFM entry after eight consecutive inductor-current zero crossings. Thermal shutdown activates at 150°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% over -40°C to +85°C, enabling direct replacement of adjustable variants without resistor divider design. |
| Output Current | 6A continuous; supports >6A via phase interleaving with second ISL8016, reducing input/output ripple by √2. |
| Input Voltage Range | 2.7V–5.5V DC; includes 2.5V dropout headroom at full load, suitable for single-cell Li-ion (3.0–4.2V) and 3.3V/5V rail inputs. |
| Efficiency | Up to 97% at 5VIN/2.5VOUT/3A; maintains >85% down to 0.3A in PFM mode, critical for battery runtime extension. |
| Switching Frequency | Adjustable 500kHz–4MHz via FS pin resistor; default 1MHz with internal compensation simplifies layout for most POL applications. |
| Quiescent Current | 70µA in PFM no-load mode; enables always-on subsystems in portable instruments without significant standby drain. |
| Protection Features | Reverse current blocking, pre-bias start-up, hiccup-mode OCP, thermal shutdown (150°C), and UVLO (2.7V rising threshold). |
Pinout & Package
ISL8016IR25Z-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 (θJA = 42°C/W, θJC = 5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19, 20 | PGND | Power ground return for high-current switching paths; must be low-inductance plane connection to minimize noise and EMI. |
| 2, 3, 4 | PHASE | Switch node connecting integrated high-side and low-side MOSFETs to inductor; requires tight layout to reduce ringing and losses. |
| 5, 6, 7 | VIN | Main input supply (2.7–5.5V); requires two 22µF ceramic capacitors placed close to pins for high-frequency decoupling. |
| 8 | PG | Open-drain power-good signal; asserts after 1ms delay when VOUT reaches regulation; requires external 10kΩ–100kΩ pull-up to VIN. |
| 9 | SYNCOUT | 250µA current-source sync pulse output; used to daisy-chain multiple ISL8016s for phase interleaving and beat-frequency elimination. |
| 10 | SYNCIN | Mode select/sync input: logic high = PWM, logic low = PFM, external clock = synchronization source up to 4MHz. |
| 11 | EN | Active-high enable with internal 1MΩ pull-down; drives low to shut down and actively discharge output capacitor. |
| 12 | FS | Frequency set pin: connect to VIN for 1MHz internal compensation, or to SGND via resistor for 500kHz–4MHz adjustment. |
| 13 | VSET | Output margining control: floating = nominal, VIN = +10%, SGND = –10%; not used in fixed-output ISL8016IR25Z-T but retained for compatibility. |
| 14 | ISET | Peak current limit selection: floating = 6A (default), VIN = 4A, SGND = 2A; sets OCP threshold and SKIP current limit simultaneously. |
| 15 | SS | Soft-start timing control: SGND = 1ms internal ramp; capacitor to SGND extends ramp time (≤33nF recommended). |
| 16, 17 | COMP / VFB | VFB is feedback input (shorted internally for fixed 2.5V); COMP is error amp output - tied to SGND when FS = VIN (internal compensation). |
| 18 | SGND | Signal ground reference for feedback, soft-start, and margining circuits; separate from PGND but connected via low-impedance path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side MOSFETs | P-Channel ON-resistance ≤45mΩ and N-Channel ≤35mΩ at 5VIN, eliminating external FETs and gate drivers to reduce BOM count and layout area. |
| 100% Duty-Cycle Operation | Enables <200mV dropout at 6A output, supporting ultra-low-VIN–VOUT scenarios such as post-regulation from 2.7V sources. |
| Pre-Biased Output Start-Up | Allows safe startup into an already charged output rail (e.g., hot-swap systems), preventing reverse current flow into upstream supplies. |
| Phase Interleaving Capability | SYNCOUT/SYNCIN interface enables precise master-slave timing alignment between multiple ISL8016s, reducing input capacitor RMS current by ~30%. |
| Adjustable Light-Load Mode | Configurable PFM/PWM operation via SYNCIN pin: PFM minimizes quiescent current (70µA), while forced PWM reduces EMI in noise-sensitive applications. |
Applications
| FPGA Core Power | µP/ASIC Core Rail |
|---|---|
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V FPGA core banks requiring stable 2.5V at up to 6A with fast load transient response. IC Role / Device Role / Timing Role: Primary point-of-load (POL) regulator delivering regulated 2.5V from 3.3V or 5V intermediate bus; manages dynamic current steps up to 3A/µs. Use Value: 97% peak efficiency and 1MHz switching minimize heat rise in dense FPGA carrier boards; PFM mode extends battery life in portable test equipment. |
Use Scenario: Supplying ARM Cortex-A9 or RISC-V SoC cores in industrial gateways where 2.5V rail must remain stable during burst-mode processing. IC Role / Device Role / Timing Role: Synchronous buck converter providing low-noise, tightly regulated 2.5V with <1% line/load regulation and 1ms soft-start sequencing. Use Value: Pre-bias start-up ensures clean power delivery during hot-plug events; reverse current protection prevents backfeeding into shared 3.3V domain. |
| Li-ion Powered Instruments | DC/DC POL Module |
Use Scenario: Power management in handheld oscilloscopes or multimeters using single-cell Li-ion (3.0–4.2V) with 2.5V analog front-end requirement. IC Role / Device Role / Timing Role: Main step-down regulator converting variable battery voltage to fixed 2.5V with ultra-low quiescent current (70µA) in sleep mode. Use Value: 70µA PFM quiescent current extends shelf life; 100% duty-cycle operation sustains regulation down to 2.7V battery cutoff without brownout. |
Use Scenario: Embedded 2.5V POL module in telecom routers where space-constrained 3×4mm footprint and thermal performance are critical. IC Role / Device Role / Timing Role: Monolithic buck IC integrated into compact 0.15in² PCB area with exposed-pad QFN for conduction cooling to internal heatsink planes. Use Value: θJC = 5°C/W enables 6A operation at <40°C junction rise under 10LFM airflow; eliminates need for external thermal vias or copper slugs. |
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, 2.5V fixed output; 3.5–17V input; 500kHz–3.5MHz sync range; no PFM mode; higher min input voltage. | Requires ≥3.5V input - unsuitable for Li-ion direct feed; lacks pre-bias start and reverse current protection. | Select TPS54620RGYT only when input rail is ≥3.5V and EMI filtering is prioritized over light-load efficiency. |
| MP2315GJ-Z | 6A, adjustable output (0.8–6V); 4.5–28V input; 350kHz–2.5MHz; no SYNCOUT, no margining, lower efficiency (94% peak). | Not pin-compatible; requires external feedback resistors; lacks phase-interleaving capability and 100% duty cycle. | Choose MP2315GJ-Z only if wider input range (≥4.5V) and cost sensitivity outweigh need for 2.5V fixed output and advanced sync features. |
Compared with TPS54620RGYT and MP2315GJ-Z, the ISL8016IR25Z-T uniquely combines 2.5V fixed output, 2.7V minimum input, PFM/PWM mode flexibility, and SYNCOUT-driven phase interleaving - making it optimal for space-constrained, battery-fed, and multi-rail POL systems demanding high light-load efficiency and robust fault handling.
Availability
ISL8016IR25Z-T is available at Aetrix Electronics and suitable for FPGA core power, µP/ASIC core rails, and Li-ion powered instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8016IR25Z-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 manufacture and support its high-performance analog power portfolio, including DC/DC regulators optimized for efficiency, thermal density, and system-level integration.
The ISL8016IR25Z-T belongs to Renesas' ISL80xx family of monolithic synchronous buck regulators designed specifically for point-of-load applications in computing, communications, and portable instrumentation where small size, high efficiency, and robust protection are mandatory.
FAQ
What is the output voltage tolerance of the ISL8016IR25Z-T over temperature and load?
The ISL8016IR25Z-T delivers 2.5V output with ±1% accuracy across –40°C to +85°C ambient temperature, full 0–6A load range, and 2.7–5.5V input voltage. This specification is guaranteed by the 0.600V internal reference (±1%) and precision feedback network, ensuring stable core rail operation without external calibration.
Does the ISL8016IR25Z-T support synchronization with external clock sources?
Yes, the ISL8016IR25Z-T supports external synchronization up to 4MHz via the SYNCIN pin. When driven by an external clock's rising edge, it aligns PHASE switching and triggers SYNCOUT pulses - enabling deterministic phase relationships between multiple ISL8016IR25Z-T units in interleaved configurations.
How does the ISL8016IR25Z-T handle startup into a pre-biased output?
The ISL8016IR25Z-T safely starts into a pre-charged output by disabling high-side FET turn-on until the internal soft-start ramp exceeds the output voltage. This prevents reverse current flow through the low-side FET, protecting both the IC and upstream supplies during hot-swap or multi-rail sequencing events.
What thermal performance can be expected from the ISL8016IR25Z-T in a typical 4-layer PCB layout?
In a standard 4-layer board with 2oz copper, thermal vias under the exposed pad, and 10LFM airflow, the ISL8016IR25Z-T achieves θJA ≈ 42°C/W. At 6A/2.5V output with 5V input, power dissipation is ~0.9W, resulting in ~38°C junction-to-ambient rise - well within the –55°C to +125°C operating range.
Can the ISL8016IR25Z-T operate with input voltage below 2.7V?
No - the ISL8016IR25Z-T has a guaranteed undervoltage lockout (UVLO) rising threshold of 2.7V. Operation below this voltage is not characterized or supported; attempting to operate below 2.7V may result in unstable regulation, undefined protection behavior, or failure to start.
ISL8016IR25Z-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- 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)
ISL8016IR25Z-T FAQ
1.How can I place an order for ISL8016IR25Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IR25Z-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 ISL8016IR25Z-T reliable?
The price and inventory of ISL8016IR25Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IR25Z-T is usually 5 days.
3.What payment methods are accepted for ISL8016IR25Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IR25Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IR25Z-T?
ISL8016IR25Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IR25Z-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 ISL8016IR25Z-T?
For technical support, including ISL8016IR25Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IR25Z-T requirements.
6.How does Aetrix verify that ISL8016IR25Z-T is sourced from the original manufacturer or authorized distributors?
All ISL8016IR25Z-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 ISL8016IR25Z-T meets industry standards.
7.What is the process for return or replacement of ISL8016IR25Z-T?
All ISL8016IR25Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IR25Z-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 ISL8016IR25Z-T part is unused and in its original packaging.
Return procedure for ISL8016IR25Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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