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Renesas ISL8016IR25Z-T7A
- Part No.:
- ISL8016IR25Z-T7A
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IR25Z-T7A.pdf
- Description:
- IC REG BUCK 2.5V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:750
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Product details
Overview
ISL8016IR25Z-T7A from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 6A continuous output current from a 2.7V–5.5V input, with fixed 2.5V output, ±10% margining capability, and integrated high- and low-side MOSFETs (45mΩ/35mΩ typical at 5V). It supports PWM/PFM mode selection, 1MHz default switching frequency, and operates in DC/DC POL applications for FPGA and microprocessor core power.
For engineers reviewing the ISL8016IR25Z-T7A datasheet, ISL8016IR25Z-T7A pinout, ISL8016IR25Z-T7A application, or ISL8016IR25Z-T7A equivalent, key selection criteria include its 2.5V fixed output accuracy (±1%), 70µA quiescent current in PFM no-load operation, thermal shutdown at 150°C, and compatibility with phase-interleaved paralleling for >6A solutions.
Technical Context
The ISL8016IR25Z-T7A uses peak current-mode control with slope compensation for fast transient response and loop stability. Its internal 0.6V reference and feedback divider network (set for 2.5V output) feed into a transconductance error amplifier (100µA/V gain with internal compensation), enabling precise regulation across line, load, and temperature.
It implements dual protection architecture: hiccup-mode overcurrent protection triggered after 17 consecutive fault cycles (with ISET floating → 7.7–11.5A peak limit), and negative current sensing that disables both FETs upon detection of –3A valley current for four cycles - critical for pre-biased start-up and reverse-current prevention in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% over -40°C to +85°C - ensures stable core supply for 2.5V I/O or analog subsystems without external resistor network. |
| Max Output Current | 6A continuous - supports high-current FPGA I/O banks or ASIC auxiliary rails without external current sharing. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, or industrial 3.3V/5V intermediate bus. |
| Quiescent Current | 70µA in PFM no-load - extends battery life in portable instruments and always-on sensor nodes. |
| Switching Frequency | Default 1MHz (adjustable 500kHz–4MHz via FS pin) - balances efficiency, size, and EMI; enables compact 1µH inductor use. |
| Thermal Resistance | θJA = 42°C/W, θJC = 5°C/W (3x4 QFN) - supports 6A operation with minimal heatsinking on standard 2-layer PCBs. |
| Protection Features | Overtemperature shutdown (150°C), hiccup-mode OCP, reverse-current blocking, pre-bias start-up - eliminates need for external fault management circuitry. |
Pinout & Package
ISL8016IR25Z-T7A is housed in a RoHS-compliant, lead-free 20-lead 3mm × 4mm QFN package with exposed thermal pad (L20.3x4), optimized for high-power density and thermal performance. The exposed pad must be soldered to SGND for electrical integrity and thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19, 20 | PGND | Power ground return for high-current switching paths - requires low-inductance connection to input/output capacitors and thermal pad. |
| 2, 3, 4 | PHASE | Switch node connecting internal high-side and low-side MOSFETs to inductor - critical for EMI layout; minimize loop area. |
| 5, 6, 7 | VIN | Main input supply (2.7–5.5V); decoupled by two 22µF ceramic caps directly to PGND - reduces input ripple and improves PSRR. |
| 8 | PG | Open-drain power-good signal - indicates regulated output within ±10% window after 1ms delay; requires external 10kΩ–100kΩ pull-up to VIN. |
| 10 | SYNCIN | Mode select/synchronization input - logic high = PWM, low = PFM, external clock = sync master; internal 1MΩ pull-down prevents floating. |
| 11 | EN | Enable control with internal 1MΩ pull-down - active-high; drives low to shut down and discharge output capacitor via soft-stop. |
| 12 | FS | Frequency set pin - tied to VIN for 1MHz internal compensation; resistor to SGND adjusts frequency 500kHz–4MHz. |
| 14 | ISET | Peak current limit configuration - floating = 6A (default), VIN = 4A, SGND = 2A - sets OCP threshold without external components. |
| 15 | SS | Soft-start timing control - grounded = 1ms internal ramp; capacitor to SGND extends ramp time (≤33nF). |
| 16, 17 | COMP / VFB | VFB is feedback input (0.6V reference); COMP is error amp output - for fixed-output variants like ISL8016IR25Z-T7A, VFB connects to output and COMP ties to SGND. |
| 18 | SGND | Signal ground reference for feedback, compensation, and logic pins - must be star-connected to PGND under thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side MOSFETs | 45mΩ P-FET / 35mΩ N-FET (at 5V) - eliminates external power switches, reduces BOM count, and enables <0.2V dropout at 6A. |
| Adjustable Output Margining | ±10% via VSET pin (VIN = +10%, SGND = –10%) - supports system-level voltage tolerance testing and margin analysis without hardware change. |
| Pre-Biased Output Start-Up | Starts regulation even when output is pre-charged to 2.5V - prevents reverse current flow and ensures safe power sequencing in multi-rail systems. |
| Phase-Interleaved Paralleling | Synchronize multiple ISL8016IR25Z-T7A units via SYNCIN/SYNCOUT with programmable phase shift - reduces input/output ripple and enables 12A+ solutions. |
| Soft-Stop Output Discharge | Active discharge path during EN low - safely collapses 2.5V rail within milliseconds, preventing latch-up in downstream logic during shutdown. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact point-of-load converter on server motherboard supplying 2.5V I/O voltage to FPGA configuration banks. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 2.5V at up to 6A with tight transient response. Use Value: Integrated MOSFETs and 1MHz operation enable <0.15in² footprint; ±1% output accuracy ensures reliable FPGA configuration and interface signaling. | Use Scenario: Core power supply for ARM-based microcontroller with 2.5V analog peripherals and USB PHY. IC Role / Device Role / Timing Role: Fixed-output buck regulator providing clean, low-noise 2.5V rail with PFM mode for ultra-low standby current. Use Value: 70µA quiescent current in PFM extends battery runtime; pre-bias start-up supports hot-swap insertion without brownout. |
| Plug-in DC/DC Modules for Routers and Switchers | Portable Instruments |
Use Scenario: Hot-pluggable 2.5V power module in modular Ethernet switch chassis with strict EMI requirements. IC Role / Device Role / Timing Role: Synchronized buck regulator operating at 2MHz to shift noise above sensitive 1.25GHz RF bands. Use Value: Adjustable frequency (500kHz–4MHz) and SYNCOUT-driven phase interleaving reduce conducted emissions by >10dB vs unsynchronized operation. | Use Scenario: Battery-powered handheld multimeter requiring stable 2.5V reference and analog front-end supply. IC Role / Device Role / Timing Role: Main power IC converting single Li-ion cell (3.0–4.2V) to precision 2.5V rail with reverse-current protection. Use Value: Negative current limit prevents backfeed from analog circuits into the regulator during sleep mode, preserving battery charge. |
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 2.5V option; requires external compensation. | Wider input range suits 12V intermediate bus; lacks built-in margining and pre-bias start-up. | Select when input exceeds 5.5V or adjustable output is required; verify loop stability with external compensation network. |
| MP2315GJ-Z | 6A, 4.5–28V input, fixed 2.5V option available; lower quiescent current (30µA) but no PFM mode or SYNC capability. | Better suited for higher-input industrial supplies; missing phase-interleaving and margining features. | Choose for cost-sensitive 24V-input applications where synchronization and margin testing are not required. |
Compared with TPS54620RGYT and MP2315GJ-Z, the ISL8016IR25Z-T7A uniquely combines fixed 2.5V output, ±10% margining, PFM/PWM mode flexibility, and robust pre-bias start-up - making it optimal for portable and FPGA-centric designs demanding precision, low-noise, and seamless power sequencing.
Availability
ISL8016IR25Z-T7A is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power delivery, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8016IR25Z-T7A 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 support its high-performance analog and power management portfolio.
The ISL8016IR25Z-T7A belongs to Renesas' ISL80xx family of monolithic synchronous buck regulators, designed specifically for high-efficiency, low-noise, and space-constrained point-of-load applications in computing, communications, and portable electronics.
FAQ
What is the output voltage tolerance of the ISL8016IR25Z-T7A over temperature and load?
The ISL8016IR25Z-T7A delivers a fixed 2.5V output with ±1% accuracy over the full operating temperature range (–40°C to +85°C) and load (0–6A), as specified in the Analog Specifications table on page 7 of FN7616 Rev 1.00. This tight tolerance is achieved using an internal 0.6V bandgap reference and precision feedback divider laser-trimmed during production - ensuring consistent 2.5V regulation for sensitive analog and I/O circuits without external calibration. The ISL8016IR25Z-T7A maintains this accuracy across line, load, and temperature variations.
Does the ISL8016IR25Z-T7A support pre-biased output start-up?
Yes, the ISL8016IR25Z-T7A supports start-up with a pre-biased output, a critical feature for systems requiring strict power sequencing. When enabled, the device prevents reverse current flow by controlling the low-side MOSFET gate drive during start-up, allowing the output to rise from an initial 2.5V level without discharging downstream capacitance. This behavior is confirmed in the "Features" section (page 1) and "Theory of Operation" (page 15) of FN7616 Rev 1.00. The ISL8016IR25Z-T7A implements this via valley-current sensing and controlled N-FET turn-off - ensuring safe, glitch-free regulation even when the output is pre-charged.
How is the switching frequency configured on the ISL8016IR25Z-T7A?
The ISL8016IR25Z-T7A defaults to 1MHz operation when the FS pin is tied to VIN, enabling internal compensation. To adjust frequency between 500kHz and 4MHz, connect a resistor from FS to SGND per Equation 1 on page 16: RT (kΩ) = (220 × 10³)/fOSC(kHz) – 14. For example, a 42.4kΩ resistor sets ~3.9MHz. The ISL8016IR25Z-T7A also accepts external synchronization up to 4MHz via the SYNCIN pin, with master-slave phase shifting supported through SYNCOUT and external capacitors - all verified in Figures 35–37 and Table 1 of FN7616 Rev 1.00.
What protection features does the ISL8016IR25Z-T7A include?
The ISL8016IR25Z-T7A integrates six key protections: (1) hiccup-mode overcurrent protection (17-cycle fault counter), (2) thermal shutdown at 150°C with 25°C hysteresis, (3) undervoltage lockout (2.7V rising threshold), (4) reverse-current blocking during light load, (5) soft-stop output discharge on disable, and (6) negative current limiting (–3A valley detection). These are documented in Sections 1 ("Features"), 7 ("Analog Specifications"), and 15 ("Theory of Operation") of FN7616 Rev 1.00. The ISL8016IR25Z-T7A executes all protections autonomously without external components - enhancing system reliability in mission-critical applications.
Can multiple ISL8016IR25Z-T7A units be paralleled for higher current?
Yes, the ISL8016IR25Z-T7A supports current sharing via phase interleaving: one unit acts as master (SYNCOUT driving SYNCIN of slave(s)), with programmable phase shift using external capacitors (e.g., 100pF yields ~90° shift at 1MHz). Figure 3 and Equation 2 on page 16 of FN7616 Rev 1.00 confirm this capability for >6A outputs (e.g., 12A in Figure 3). The ISL8016IR25Z-T7A's matched internal timing, identical fixed 2.5V output, and synchronized current limits ensure balanced load sharing - eliminating the need for external current-sense resistors or complex control ICs.
ISL8016IR25Z-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-T7A FAQ
1.How can I place an order for ISL8016IR25Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IR25Z-T7A 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-T7A reliable?
The price and inventory of ISL8016IR25Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IR25Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL8016IR25Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IR25Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IR25Z-T7A?
ISL8016IR25Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IR25Z-T7A 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-T7A?
For technical support, including ISL8016IR25Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IR25Z-T7A requirements.
6.How does Aetrix verify that ISL8016IR25Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8016IR25Z-T7A 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-T7A meets industry standards.
7.What is the process for return or replacement of ISL8016IR25Z-T7A?
All ISL8016IR25Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IR25Z-T7A, 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-T7A part is unused and in its original packaging.
Return procedure for ISL8016IR25Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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