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Renesas ISL8016IR33Z-T
- Part No.:
- ISL8016IR33Z-T
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IR33Z-T.pdf
- Description:
- IC REG BUCK 3.3V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,026
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Product details
Overview
ISL8016IR33Z-T 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 3.3V output, ±1% regulation accuracy over temperature/load/line, and integrated high- and low-side MOSFETs (45mΩ P-Ch / 35mΩ N-Ch at 5V). It supports PWM/PFM mode selection, 1MHz default switching frequency, and reverse current protection - deployed in FPGA and µP core power supplies.
For engineers reviewing the ISL8016IR33Z-T datasheet, ISL8016IR33Z-T pinout, ISL8016IR33Z-T application, or ISL8016IR33Z-T equivalent, key selection criteria include its 3.3V fixed output, 6A capability with thermal performance enabled by the 3×4 QFN exposed pad, light-load PFM efficiency optimization, and synchronization support for multi-phase designs.
Technical Context
The ISL8016IR33Z-T uses peak current-mode control with slope compensation for fast transient response and loop stability. Its internal 0.6V reference and feedback divider (set for 3.3V output) feed into a transconductance error amplifier with internal 55pF/168kΩ compensation when FS = VIN.
It implements dual protection architecture: hiccup-mode OCP triggered after 17 consecutive overcurrent events (configurable via ISET pin), and negative current sensing that disables both FETs upon detection of −3A valley current for four cycles - enabling safe pre-biased start-up and reverse current blocking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over −40°C to +85°C - ensures stable core rail for 3.3V logic and interface ICs without external resistor network. |
| Max Output Current | 6A continuous - supports high-current FPGA I/O banks or multi-core processors without external current sharing. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), 3.3V system rails, and 5V intermediate bus architectures. |
| Switching Frequency | Default 1MHz (FS = VIN); adjustable 500kHz–4MHz - enables EMI-sensitive designs to shift switching noise out of critical bands. |
| Efficiency | Up to 97% at 3.3V/3A (VIN = 5V, PWM) - minimizes thermal load in space-constrained POL modules. |
| Quiescent Current | 70µA in PFM no-load mode - extends battery runtime in portable instruments and always-on subsystems. |
| Thermal Resistance | θJA = 42°C/W, θJC = 5°C/W - enables >4W dissipation with standard PCB copper and thermal vias under the exposed pad. |
Pinout & Package
Package: 20-lead 3mm × 4mm QFN with exposed thermal pad (Pb-free, RoHS-compliant, MSL3). Requires solder connection of EPAD to SGND plane with ≥6 thermal vias for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19, 20 | PGND | Power ground return for high-current switching paths - must be low-inductance connection to input/output capacitors and inductor. |
| 2, 3, 4 | PHASE | Switch node connecting internal high-side and low-side MOSFETs to inductor - requires short, wide trace to minimize ringing and EMI. |
| 5, 6, 7 | VIN | Main input supply (2.7–5.5V) - decoupled by two 22µF ceramic capacitors directly to PGND. |
| 8 | PG | Open-drain power-good signal - pulled high via 100kΩ to VIN; asserts after 1ms delay once VOUT reaches regulation ±15%. |
| 10 | SYNCIN | Mode control/synchronization input - logic high = PWM, logic low = PFM, external clock = sync master/slave operation. |
| 11 | EN | Enable/disable control with 1MΩ internal pull-down - drives low to shut down and actively discharge output capacitor. |
| 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, VIN = 4A, SGND = 2A - sets OCP threshold and SKIP current limit. |
| 15 | SS | Soft-start timing control - grounded = 1ms internal ramp; capacitor to SGND extends ramp time for inrush control. |
| 16, 17 | COMP / VFB | VFB is feedback input (0.6V reference); COMP is error amp output - for ISL8016IR33Z-T, VFB is internally connected to fixed-divider; COMP tied to SGND when FS = VIN. |
| 18 | SGND | Signal ground reference for feedback, compensation, and logic pins - isolated from PGND except at single-point EPAD connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | P-Channel (45mΩ) and N-Channel (35mΩ) switches eliminate external FETs and gate drivers - reduces BOM count and layout area by >30% vs discrete solutions. |
| Pre-biased Start-up | Supports start-up into an already charged output rail - prevents reverse current flow and avoids output voltage collapse during hot-swap or multi-rail sequencing. |
| Phase Interleaving Support | Synchronization via SYNCIN/SYNCOUT enables precise phase offset between multiple ISL8016IR33Z-T units - reduces input/output ripple and allows >6A total current with lower EMI. |
| 100% Duty Cycle Operation | Enables <200mV dropout at 6A - maintains regulation even as input drops near output voltage, critical for Li-ion battery end-of-discharge operation. |
| Adjustable Output Margining | VSET pin allows ±10% output adjustment (via VIN/SGND/floating) - supports system-level voltage margin testing without hardware change. |
Applications
| DC/DC POL Modules | µC/µP and FPGA Core Power |
|---|---|
Use Scenario: Compact point-of-load converter on server motherboard delivering clean 3.3V to peripheral controllers and PCIe switch I/O rails. IC Role / Device Role / Timing Role: Primary 3.3V regulator with integrated power stage, PG signaling, and thermal shutdown - manages local power domain independently. Use Value: 97% peak efficiency and 42°C/W θJA enable full 6A delivery in <0.15in² footprint without forced air cooling. | Use Scenario: Powering I/O banks and configuration circuitry of Xilinx Artix-7 FPGA in industrial PLC with strict thermal budget. IC Role / Device Role / Timing Role: Fixed-output synchronous buck supplying 3.3V at up to 6A with pre-biased start-up and reverse current protection. Use Value: Eliminates need for external current sense and protection ICs while supporting hot-plug FPGA configuration via controlled soft-start. |
| Portable Test Instruments | Li-ion Battery-Powered Devices |
Use Scenario: Handheld oscilloscope requiring ultra-low quiescent current in standby and fast transient response during active measurement. IC Role / Device Role / Timing Role: Main 3.3V system rail regulator operating in PFM mode at light loads (<1mA IQ) and PWM under load. Use Value: 70µA no-load IQ extends battery life; 1MHz switching enables small 1µH inductor and compact 47µF ceramic output caps. | Use Scenario: Medical glucose meter powered by single-cell Li-ion (3.0–4.2V), needing regulated 3.3V for MCU and sensor interface with battery-life optimization. IC Role / Device Role / Timing Role: Input-voltage adaptive buck converter maintaining 3.3V output across full battery discharge curve. Use Value: 100% duty-cycle capability sustains regulation down to 3.5V input; hiccup-mode OCP protects against shorted sensor cables. |
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, 3.3V fixed, 2.95–6V input, 500kHz–2.2MHz adjustable freq, 12µA IQ in Eco-mode | Lower quiescent current but no PFM mode; requires external compensation; different pinout and package (16-pin QFN) | Preferred where ultra-low standby power dominates over light-load efficiency and board space is less constrained. |
| MP2315GJ-Z | 6A, 3.3V fixed, 4.5–28V input, 500kHz fixed freq, 250µA IQ, no sync or margining | Wider input range but higher minimum input; lacks synchronization, margining, and pre-bias start-up | Selected for cost-sensitive industrial controls with 12V/24V input buses where 3.3V rail stability is primary requirement. |
Compared with TPS54620RGYT and MP2315GJ-Z, the ISL8016IR33Z-T uniquely combines PFM efficiency optimization, ±10% output margining, and robust pre-biased start-up in a thermally optimized 3×4 QFN - making it optimal for battery-powered and FPGA-adjacent POL applications demanding both precision and resilience.
Availability
ISL8016IR33Z-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/µP and FPGA power delivery, and portable instrumentation requiring stable component supply and long-term manufacturability.
Supply support for ISL8016IR33Z-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 its high-performance analog and power management portfolio. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and infrastructure markets.
The ISL8016 product line delivers high-efficiency, monolithic synchronous buck regulators for space-constrained, thermally sensitive point-of-load applications - designed specifically for powering FPGAs, microprocessors, and ASICs in portable and industrial systems.
FAQ
What is the output voltage tolerance of the ISL8016IR33Z-T over temperature and load?
The ISL8016IR33Z-T provides ±1% output voltage accuracy over the full operating temperature range (−40°C to +85°C), line (2.7V–5.5V input), and load (0–6A). This is confirmed in the Analog Specifications table on page 7 of FN7616 Rev 1.00, where VVFB for ISL8016IR33Z is specified as 3.266V (min), 3.300V (typ), and 3.333V (max) at VSET = FLOAT.
Does the ISL8016IR33Z-T support pre-biased output start-up?
Yes, the ISL8016IR33Z-T explicitly supports start-up with a pre-biased output. The datasheet states "Start-up with Pre-Biased Output" as a feature on page 1, and the Negative Current Protection section (page 17) confirms it disables both FETs upon detecting sustained negative inductor current - preventing reverse conduction and enabling safe hot-insertion into an existing 3.3V rail.
How is the switching frequency set on the ISL8016IR33Z-T?
The ISL8016IR33Z-T defaults to 1MHz when the FS pin is connected 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, 42.4kΩ yields ~3.9MHz.
What protection features does the ISL8016IR33Z-T include?
The ISL8016IR33Z-T integrates peak current limiting, hiccup-mode short-circuit protection (after 17 consecutive OCP events), over-temperature shutdown (150°C trip, 125°C hysteresis), input undervoltage lockout (2.7V rising threshold), reverse current protection, and soft-stop output discharge during disable - all documented in the Features list (page 1) and Analog Specifications (pages 7–9).
Can multiple ISL8016IR33Z-T units be synchronized for higher current?
Yes, the ISL8016IR33Z-T supports synchronization via SYNCIN/SYNCOUT pins. SYNCIN accepts external clocks up to 4MHz; SYNCOUT provides a 250µA current pulse synchronized to the internal clock or SYNCIN (whichever is faster). Figure 3 and Equation 2 on page 16 detail phase-interleaved multi-chip configurations supporting >6A with reduced ripple.
ISL8016IR33Z-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):
- 3.3V
- 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)
ISL8016IR33Z-T FAQ
1.How can I place an order for ISL8016IR33Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IR33Z-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 ISL8016IR33Z-T reliable?
The price and inventory of ISL8016IR33Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IR33Z-T is usually 5 days.
3.What payment methods are accepted for ISL8016IR33Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IR33Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IR33Z-T?
ISL8016IR33Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IR33Z-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 ISL8016IR33Z-T?
For technical support, including ISL8016IR33Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IR33Z-T requirements.
6.How does Aetrix verify that ISL8016IR33Z-T is sourced from the original manufacturer or authorized distributors?
All ISL8016IR33Z-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 ISL8016IR33Z-T meets industry standards.
7.What is the process for return or replacement of ISL8016IR33Z-T?
All ISL8016IR33Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IR33Z-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 ISL8016IR33Z-T part is unused and in its original packaging.
Return procedure for ISL8016IR33Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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