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Renesas ISL8016IRAJZ
- Part No.:
- ISL8016IRAJZ
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL8016IRAJZ.pdf
- Description:
- IC REG BUCK ADJ 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,476
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Product details
Overview
ISL8016IRAJZ from Renesas Electronics (formerly Intersil) is a monolithic synchronous buck DC/DC regulator delivering up to 6A continuous output current from a 2.7V–5.5V input, with adjustable output voltage from 0.6V to VIN, 1% reference accuracy over temperature/load/line, and integrated P/N-channel MOSFETs enabling >97% peak efficiency. It serves as a high-density POL power stage for FPGA, µP, and DSP core supplies.
For engineers reviewing the ISL8016IRAJZ datasheet, ISL8016IRAJZ pinout, ISL8016IRAJZ application, or ISL8016IRAJZ equivalent, key selection criteria include its adjustable current limit (2A/4A/6A), 500kHz–4MHz programmable switching frequency, pre-bias start capability, reverse current protection, and thermal shutdown with 25°C hysteresis - all critical for battery-powered and space-constrained embedded systems.
Technical Context
The ISL8016IRAJZ employs current-mode PWM control with slope compensation (360mV/Ts) and transconductance error amplifier (100µA/V internal, 200µA/V external) for fast transient response and loop stability. Its dual-mode operation supports forced continuous conduction (PWM) or discontinuous conduction (PFM) at light load, with automatic transition triggered by SYNCIN logic level.
It integrates a 100% duty-cycle capable PHASE driver, 0.6V bandgap reference with ±10% margining via VSET, and robust protection including hiccup-mode short-circuit response (17-cycle OCP counter), negative current detection (−3A threshold), and 150°C thermal shutdown with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6A continuous - supports high-current digital loads without external current sharing in single-chip configuration. |
| 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. |
| Reference Accuracy | ±1% over temperature/load/line - ensures tight output regulation across operating conditions without trimming. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 1MHz) - enables optimization of size (higher fSW → smaller L/C) vs. efficiency (lower fSW → lower switching loss). |
| Quiescent Current | 70µA in PFM no-load mode - extends battery life in always-on portable instrumentation. |
| Thermal Resistance | θJA = 42°C/W, θJC = 5°C/W - low junction-to-case resistance enables high-power operation in compact 3x4 QFN package. |
| Protection Features | Hiccup-mode OCP, reverse current blocking, pre-bias start, soft-stop discharge, UVLO (2.7V rising), thermal shutdown (150°C) - ensures robustness in dynamic load and fault scenarios. |
Pinout & Package
ISL8016IRAJZ is housed in a 20-lead 3mm × 4mm QFN package with exposed thermal pad (L20.3x4), RoHS-compliant matte tin finish, MSL3 rating, and optimized thermal performance via direct connection of EPAD to SGND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,19,20 PGND | Power ground return for high-current paths | Must be connected to low-impedance ground plane; shares return path with PHASE and VIN capacitors. |
| 2,3,4 PHASE | Switching node connecting internal MOSFETs to inductor | High dv/dt node requiring minimized trace length and loop area to reduce EMI and switching losses. |
| 5,6,7 VIN | Main input supply (2.7V–5.5V) | Requires two 22µF ceramic capacitors placed close to pins for high-frequency decoupling. |
| 8 PG | Open-drain power-good indicator | Signals valid regulation after 1ms delay; requires external 10kΩ–100kΩ pull-up to VIN. |
| 9 SYNCOUT | Master synchronization pulse output | 250µA current source synchronized to internal clock or SYNCIN; used to phase-interleave multiple ICs. |
| 10 SYNCIN | Mode selection and external sync input | Pull high for PWM, low for PFM, or drive with external clock (500kHz–4MHz) for system-wide timing alignment. |
| 11 EN | Enable/disable control with internal 1MΩ pull-down | Drives low to shut down and actively discharge output; supports sequencing and standby modes. |
| 12 FS | Frequency set resistor input | Connect to GND via resistor (42.4kΩ–402kΩ) to program 500kHz–4MHz; tie to VIN for default 1MHz + internal compensation. |
| 13 VSET | Output voltage margining control | Connect to VIN (+10%), float (no margin), or SGND (−10%) - enables system-level margin testing without hardware change. |
| 14 ISET | Peak current limit selection | Set to SGND (2A), VIN (4A), or float (6A) - configures OCP threshold and SKIP current limit independently. |
| 15 SS | Soft-start timing control | Tie to SGND for fixed 1ms ramp; add capacitor to SGND for adjustable rise time (≤33nF recommended). |
| 16 COMP | Error amplifier output for external compensation | Used only when FS is resistor-connected; tie to SGND if using internal compensation (FS = VIN). |
| 17 VFB | Feedback input for output voltage regulation | Monitors resistive divider; sets VOUT = 0.6V × (1 + R2/R3); also determines PG window thresholds. |
| 18 SGND | Signal ground reference for analog circuitry | Must be isolated from PGND at single point; connects to EPAD for optimal noise immunity and thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N MOSFETs | 31mΩ/19mΩ (VIN=5V) ON-resistance reduces conduction loss and eliminates external FET layout complexity. |
| 100% Duty-Cycle Operation | Enables <200mV dropout at 6A - critical for low-VIN, high-IOUT applications like Li-ion post-regulation. |
| Phase Interleaving Support | SYNCOUT/SYNCIN interface allows >6A output with reduced input/output ripple and EMI via multi-phase stacking. |
| Pre-Biased Output Start-Up | Allows safe startup into pre-charged output capacitors - essential for hot-swap and redundant power systems. |
| Adjustable Soft-Start | Configurable 1ms internal or capacitor-adjusted ramp prevents inrush current damage to input capacitors and upstream converters. |
| Reverse Current Protection | Active blocking prevents backfeed from output to input during shutdown or fault - protects upstream sources and simplifies system-level safety design. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, high-efficiency point-of-load converter on dense CPU/FPGA carrier boards where board space and thermal density are constrained. IC Role / Device Role / Timing Role: Primary core voltage regulator delivering dynamically scaled VDD (e.g., 0.8V–1.2V) with fast transient response to handle burst current demands. Use Value: Integrated MOSFETs and 3×4mm QFN reduce total solution size to <0.15in² while maintaining >95% efficiency at 4A load. | Use Scenario: Powering multi-rail SoC subsystems (I/O, memory, analog) requiring independent, tightly regulated voltages with sequencing control. IC Role / Device Role / Timing Role: Independent buck regulator per rail, configured via VSET/ISET/FS pins to match specific voltage, current, and noise requirements. Use Value: ±10% margining (VSET) and programmable frequency (FS) enable validation across voltage/temp corners without hardware revision. |
| Portable Instruments | Li-ion Battery Powered Devices |
Use Scenario: Handheld test equipment (e.g., DMMs, oscilloscope probes) requiring ultra-low quiescent current and stable output under varying battery voltage (3.0–4.2V). IC Role / Device Role / Timing Role: Main system supply regulator operating in PFM mode at light load to extend runtime, switching to PWM under active measurement load. Use Value: 70µA no-load IQ and 2.7V UVLO ensure full functionality down to near-end-of-discharge battery voltage. | Use Scenario: Wearables and medical sensors powered by single-cell Li-ion, demanding high efficiency across wide load range (10µA–6A) and robust fault handling. IC Role / Device Role / Timing Role: Primary step-down regulator with reverse current protection and soft-stop discharge to prevent battery drain during sleep mode. Use Value: Active reverse current blocking and 5µA shutdown current eliminate parasitic discharge paths, preserving battery charge during extended idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546B24RVFT | 40V max input, 10A output, PMBus interface, higher BOM cost | Targets industrial/high-voltage systems; lacks PFM mode and pre-bias start | Choose for >5.5V input or digital monitoring needs; not suitable for Li-ion direct input or portable low-IQ use cases. |
| MP2315GJ-Z | 6A output, 4.5–28V input, no VSET margining, no SYNCOUT phase shift | Designed for higher-input industrial rails; missing key features for precision margining and multi-phase sync | Consider for cost-sensitive 12V/24V systems where ±10% margining and master-slave interleaving are unnecessary. |
Compared with TPS546B24RVFT and MP2315GJ-Z, the ISL8016IRAJZ uniquely balances ultra-low IQ (70µA), Li-ion-compatible input range (2.7–5.5V), ±10% hardware margining, and phase-interleaving capability - making it optimal for portable, battery-critical, and high-density POL designs where input voltage and feature set are tightly constrained.
Availability
ISL8016IRAJZ is available at Aetrix Electronics and suitable for µC/µP power delivery, FPGA core voltage regulation, and portable instrumentation requiring stable component supply with long-term lifecycle support.
Supply support for ISL8016IRAJZ 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 maintains full technical and manufacturing continuity for the ISL8016 product line, delivering high-performance analog and power management ICs for industrial, automotive, and computing markets.
The ISL8016 series was designed specifically for high-current, low-voltage point-of-load regulation in space-constrained digital systems - emphasizing integration, efficiency, and robust protection for FPGA, ASIC, and microprocessor core supplies.
FAQ
What is the maximum output current capability of the ISL8016IRAJZ?
The ISL8016IRAJZ delivers up to 6A continuous output current when configured with ISET floating, as specified in the FN7616 datasheet. Peak current limit is 7.7–11.5A depending on temperature and input conditions. For >6A applications, paralleling multiple ISL8016IRAJZ units with phase interleaving is supported via SYNCOUT/SYNCIN.
Does the ISL8016IRAJZ support pre-bias start-up?
Yes, the ISL8016IRAJZ explicitly supports start-up into a pre-biased output, as confirmed in the datasheet's Features list and Theory of Operation section. This allows safe activation when the output capacitor is already charged - critical for hot-swap and redundant power architectures where the ISL8016IRAJZ may be inserted mid-operation.
How is output voltage adjusted on the ISL8016IRAJZ?
The ISL8016IRAJZ uses an external resistor divider connected to the VFB pin to set output voltage from 0.6V to VIN. The internal 0.6V reference is applied to VFB; thus VOUT = 0.6V × (1 + R2/R3). No internal fixed-voltage option exists for ISL8016IRAJZ - it is strictly adjustable, unlike ISL8016IR12Z (1.2V) or ISL8016IR33Z (3.3V) variants.
What protection features are built into the ISL8016IRAJZ?
The ISL8016IRAJZ integrates peak current limiting with hiccup-mode recovery, over-temperature shutdown (150°C, 25°C hysteresis), input undervoltage lockout (2.7V rising), reverse current blocking, soft-stop output discharge during disable, and negative current detection (−3A threshold). All protections are fully autonomous and require no external components.
Can the ISL8016IRAJZ be synchronized to an external clock?
Yes, the ISL8016IRAJZ accepts an external clock signal on the SYNCIN pin for synchronization from 500kHz to 4MHz. The rising edge of SYNCIN triggers the PHASE node, and SYNCOUT provides a 250µA current pulse to synchronize slave devices. Phase shifting between master and slave is achievable using a capacitor (e.g., C13 in Figure 3) on the SYNCOUT-to-SYNCIN path.
ISL8016IRAJZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- 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)
ISL8016IRAJZ FAQ
1.How can I place an order for ISL8016IRAJZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8016IRAJZ 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 ISL8016IRAJZ reliable?
The price and inventory of ISL8016IRAJZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8016IRAJZ is usually 5 days.
3.What payment methods are accepted for ISL8016IRAJZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8016IRAJZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8016IRAJZ?
ISL8016IRAJZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8016IRAJZ 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 ISL8016IRAJZ?
For technical support, including ISL8016IRAJZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8016IRAJZ requirements.
6.How does Aetrix verify that ISL8016IRAJZ is sourced from the original manufacturer or authorized distributors?
All ISL8016IRAJZ 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 ISL8016IRAJZ meets industry standards.
7.What is the process for return or replacement of ISL8016IRAJZ?
All ISL8016IRAJZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8016IRAJZ, 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 ISL8016IRAJZ part is unused and in its original packaging.
Return procedure for ISL8016IRAJZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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