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Renesas ISL8016IR33Z-T7A
- Part No.:
- ISL8016IR33Z-T7A
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IR33Z-T7A.pdf
- Description:
- IC REG BUCK 3.3V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
ISL8016IR33Z-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 3.3V output, ±1% accuracy over temperature/load/line, and integrated high- and low-side MOSFETs (45mΩ P-Ch / 35mΩ N-Ch at 5V). It operates in PWM or PFM mode, supports 500kHz–4MHz adjustable switching frequency, and features reverse current protection and pre-bias start-used in FPGA and µP core power supplies.
For engineers reviewing the ISL8016IR33Z-T7A datasheet, ISL8016IR33Z-T7A pinout, ISL8016IR33Z-T7A application, or ISL8016IR33Z-T7A equivalent, key selection criteria include its 3.3V fixed output, 6A capability with thermal performance enabled by the 3×4 QFN exposed-pad package, robust OCP/hiccup protection, and synchronization support for multi-phase >6A designs.
Technical Context
The ISL8016IR33Z-T7A implements peak current-mode control with slope compensation (360mV/Ts), enabling fast transient response and stable loop behavior across load and line variations. Its dual-mode operation-PWM (forced via SYNCIN high) and PFM (via SYNCIN low)-dynamically optimizes efficiency: PFM reduces quiescent current to 70µA at no load, while PWM maintains tight regulation under dynamic loads.
Internal protection includes hiccup-mode short-circuit response triggered after 17 consecutive overcurrent detections, negative current limiting at –3A over 4 cycles, and thermal shutdown at 150°C with 25°C hysteresis. The 100% duty-cycle capability enables <200mV dropout at 6A, critical for low-VIN applications like Li-ion battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over –40°C to +85°C - ensures stable I/O rail for FPGAs and communication interfaces without external feedback resistors. |
| Max Output Current | 6A continuous - supports high-current digital loads including multicore processors and DDR memory termination. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and industrial 3.3V/5V rails. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 1MHz) - allows EMI optimization and inductor size reduction; supports external sync up to 4MHz. |
| Efficiency | Up to 97% at 3.3V/3A (VIN=5V, PWM) - minimizes thermal stress and extends battery runtime in portable instruments. |
| Quiescent Current | 70µA in PFM no-load mode - preserves battery life in always-on or standby subsystems. |
| Thermal Resistance | θJA = 42°C/W, θJC = 5°C/W - enables high-power delivery in compact layouts using the exposed-pad QFN for direct thermal coupling to PCB ground plane. |
Pinout & Package
ISL8016IR33Z-T7A is housed in a RoHS-compliant, lead-free 20-lead 3mm × 4mm QFN package with exposed thermal pad (PKG DWG # L20.3x4). The exposed pad must be soldered to SGND for electrical integrity and optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19, 20 | PGND | Power ground return for high-current switching paths - requires low-inductance connection to bulk input capacitors. |
| 2, 3, 4 | PHASE | Switch node connecting internal high-side and low-side MOSFETs to inductor - critical for EMI layout and voltage stress management. |
| 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 - indicates regulated output within ±10% window; requires external 10kΩ–100kΩ pull-up to VIN. |
| 9 | SYNCOUT | 250µA current-source sync pulse output - used to daisy-chain multiple ISL8016s with phase interleaving to reduce input/output ripple. |
| 10 | SYNCIN | Mode selection and sync input - logic high = PWM, logic low = PFM, external clock = synchronization master/slave configuration. |
| 11 | EN | Enable control with internal 1MΩ pull-down - active-high; drives output capacitor discharge when low for controlled shutdown. |
| 12 | FS | Frequency set pin - connect resistor to SGND for 500kHz–4MHz adjustment; tie to VIN for default 1MHz with internal compensation. |
| 13 | VSET | Output voltage margining control - floating = nominal, VIN = +10%, SGND = –10%; enables system-level voltage tolerance testing. |
| 14 | ISET | Peak current limit selection - floating = 6A, VIN = 4A, SGND = 2A; configures OCP threshold and SKIP current limit. |
| 15 | SS | Soft-start timing control - tie to SGND for 1ms internal ramp; add capacitor for extended ramp to limit inrush current. |
| 16, 17 | COMP / VFB | Compensation node and feedback input - VFB senses output divider (not needed for fixed 3.3V); COMP used only with external compensation. |
| 18 | SGND | Signal ground reference - separate from PGND to minimize noise coupling into error amplifier and feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P- and N-Channel MOSFETs | Reduces BOM count and layout area; 45mΩ/35mΩ RDS(on) at 5V enables high efficiency without external power switches. |
| Pre-bias start capability | Allows safe startup into an already powered output rail - essential for hot-swap and redundant power systems. |
| 100% duty-cycle operation | Supports ultra-low dropout (<200mV at 6A) - maintains regulation during brown-out conditions common in battery-fed systems. |
| Phase-interleaved paralleling | Enables >6A output with reduced input/output ripple and thermal spreading across multiple ICs using SYNCOUT/SYNCIN. |
| Soft-stop output discharge | Actively discharges output capacitor during disable - prevents unintended downstream device power-up or latch-up. |
Applications
| FPGA Core Power | µP I/O Rail Supply |
|---|---|
|
Use Scenario: Providing clean, tightly regulated 3.3V to FPGA I/O banks operating across wide temperature and load transients. IC Role / Device Role / Timing Role: Primary point-of-load (POL) regulator with fast transient response and ±1% output accuracy. Use Value: Maintains signal integrity and timing margins under dynamic I/O switching; eliminates need for external feedback components. |
Use Scenario: Powering microprocessor peripheral interfaces (USB, UART, SPI) requiring stable 3.3V with low noise and high PSRR. IC Role / Device Role / Timing Role: Dedicated low-noise POL converter supporting mixed-signal timing domains. Use Value: PFM mode reduces idle power consumption; SYNCIN allows synchronization with system clock to avoid beat frequencies. |
| Portable Test Equipment | Li-ion Battery-Powered Devices |
|
Use Scenario: Supplying 3.3V to precision ADCs, DACs, and analog front-ends in handheld multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Low-quiescent, low-noise DC/DC stage minimizing measurement drift and self-heating. Use Value: 70µA PFM quiescent current extends battery life; 97% peak efficiency reduces thermal load on compact enclosures. |
Use Scenario: Regulating 3.3V from a single-cell Li-ion battery (3.0–4.2V) powering wireless modules and sensors. IC Role / Device Role / Timing Role: High-efficiency buck converter with UVLO and thermal protection for battery safety. Use Value: 100% duty cycle sustains regulation down to 3.0V battery voltage; hiccup-mode OCP prevents thermal runaway during faults. |
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, 2.95–17V input, 500kHz–2.2MHz freq, higher Vin range but larger 16-pin 4×4 QFN package. | Targets industrial 12V input systems; less suitable for Li-ion direct feed due to minimum 2.95V Vin. | Choose TPS54620RGYT when input exceeds 5.5V or board space permits larger footprint; not drop-in for ISL8016IR33Z-T7A. |
| MP2315DJ-LF-Z | 6A, adjustable output (0.8–6V), 4.5–26V input, 350kHz–2.5MHz freq, no PFM mode or pre-bias start. | Designed for higher-input industrial rails; lacks PFM efficiency optimization and pre-bias capability required in portable/battery apps. | Use MP2315DJ-LF-Z where adjustable output and wide Vin are priorities; requires external feedback network and cannot replace ISL8016IR33Z-T7A in fixed-3.3V pre-biased designs. |
Compared with TPS54620RGYT and MP2315DJ-LF-Z, the ISL8016IR33Z-T7A delivers superior light-load efficiency via PFM mode, supports true pre-bias startup, and fits in a smaller 3×4 mm footprint-making it optimal for space-constrained, battery-powered 3.3V POL applications where input stays ≤5.5V.
Availability
ISL8016IR33Z-T7A is available at Aetrix Electronics and suitable for FPGA power, µP I/O rail supply, and portable test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8016IR33Z-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 with full datasheet, simulation model, and application note availability.
The ISL8016IR33Z-T7A belongs to Renesas' ISL8016 synchronous buck regulator family, engineered for high-efficiency, low-noise point-of-load conversion in battery-powered and space-constrained embedded systems.
FAQ
What is the output voltage tolerance of the ISL8016IR33Z-T7A over temperature and load?
The ISL8016IR33Z-T7A delivers a fixed 3.3V 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 internal 0.6V bandgap reference and precision feedback circuitry, ensuring reliable operation in FPGA and µP I/O rail applications without external trimming.
Does the ISL8016IR33Z-T7A support pre-bias start, and how is it implemented?
Yes, the ISL8016IR33Z-T7A supports startup into a pre-biased output. It achieves this through internal circuitry that monitors VFB during soft-start and disables high-side switching until the output voltage falls below the target regulation level-preventing reverse current flow and ensuring safe hot-swap operation. No external components are required.
Can the ISL8016IR33Z-T7A be synchronized to an external clock, and what is the maximum frequency?
Yes, the ISL8016IR33Z-T7A accepts external synchronization via the SYNCIN pin, supporting input frequencies from 500kHz to 4MHz. The rising edge of the external clock triggers the internal PHASE node, and the internal oscillator is disabled. SYNCOUT provides a 250µA current pulse for cascading multiple ISL8016IR33Z-T7A devices with programmable phase shift.
What protection features are built into the ISL8016IR33Z-T7A?
The ISL8016IR33Z-T7A integrates peak current limiting, hiccup-mode short-circuit protection (after 17 consecutive OCP events), overtemperature shutdown at 150°C with 25°C hysteresis, reverse current protection, undervoltage lockout (2.7V rising threshold), and soft-stop output discharge during disable. These ensure robust operation in mission-critical embedded systems.
Is the ISL8016IR33Z-T7A pin-compatible with other variants in the ISL8016 family?
Yes, all ISL8016 variants-including ISL8016IR33Z-T7A, ISL8016IR12Z, and ISL8016IRAJZ-share identical 20-lead 3×4 QFN packaging and pinout. The only functional differences are output voltage (fixed vs. adjustable) and part marking; no PCB redesign is needed when substituting within the same thermal and layout constraints.
ISL8016IR33Z-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):
- 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-T7A FAQ
1.How can I place an order for ISL8016IR33Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IR33Z-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 ISL8016IR33Z-T7A reliable?
The price and inventory of ISL8016IR33Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IR33Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL8016IR33Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IR33Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IR33Z-T7A?
ISL8016IR33Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IR33Z-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 ISL8016IR33Z-T7A?
For technical support, including ISL8016IR33Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IR33Z-T7A requirements.
6.How does Aetrix verify that ISL8016IR33Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8016IR33Z-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 ISL8016IR33Z-T7A meets industry standards.
7.What is the process for return or replacement of ISL8016IR33Z-T7A?
All ISL8016IR33Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IR33Z-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 ISL8016IR33Z-T7A part is unused and in its original packaging.
Return procedure for ISL8016IR33Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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