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Renesas ISL8011IRZ
- Part No.:
- ISL8011IRZ
- Manufacturer:
- Renesas
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL8011IRZ.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,587
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Product details
Overview
ISL8011IRZ from Intersil is a 1.2A synchronous buck regulator with integrated P- and N-channel MOSFETs, operating from 2.7V to 5.5V input and delivering adjustable output down to 0.8V with ±3% accuracy. It features 1.5MHz PWM switching, 100% duty-cycle capability for ultra-low dropout (<200mV at 1.2A), and internal digital soft-start. It powers FPGA core rails in portable test equipment.
For engineers reviewing the ISL8011IRZ datasheet, ISL8011IRZ pinout, ISL8011IRZ application, or ISL8011IRZ equivalent, key selection criteria include guaranteed 1.2A output current, 1.5MHz fixed-frequency operation enabling compact 1.8µH inductor use, thermal shutdown at 150°C, and integrated POR with 200ms delay for microprocessor reset coordination.
Technical Context
The ISL8011IRZ uses peak-current-mode PWM control with internal slope compensation and dual current-sense amplifiers (CSA1/CSA2) for fast transient response and pulse-by-pulse limiting. Its voltage loop employs a transconductance error amplifier with internal 25pF/400kΩ compensation network.
It integrates a 0.8V bandgap reference, 200ms POR timer referenced to FB, and dual protection: overcurrent trip at 2.1A peak switch current (via CSA1 output ≥1V) and short-circuit detection via FB <0.2V triggering 1/3-frequency foldback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.2A guaranteed minimum - supports FPGA core and DSP I/O rails without external current boosting. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), 3.3V, and 5V system rails. |
| Switching Frequency | 1.5MHz nominal (1.35–1.75MHz over temp) - enables use of 1.8µH inductors and minimizes PCB area. |
| Feedback Voltage | 0.8V ±2% (0.78–0.82V over -40°C to +85°C) - sets precise output voltage via resistor divider on FB pin. |
| Duty Cycle Range | 0–100% - allows dropout <200mV at full load when input approaches output voltage. |
| Shutdown Current | <2µA max - preserves battery life in always-on portable instrumentation. |
| Thermal Shutdown | 150°C activation with 25°C hysteresis - protects against sustained overload or poor heatsinking. |
Pinout & Package
ISL8011IRZ is housed in a 10-lead 3mm × 3mm DFN package (L10.3x3C) with 1mm max height and exposed thermal pad connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Main power input | Supplies high-side P-MOSFET and internal circuitry; requires 10µF ceramic bypass to PGND. |
| VCC | Internal bias supply | Derived from PVIN via internal 5Ω resistor; must be bypassed with 0.1µF ceramic to SGND. |
| EN | Logic enable input | Active-high (≥1.4V); forces output capacitor discharge when pulled low (<0.4V). |
| POR | Power-on reset output | Open-drain signal with 200ms delay; asserts low until FB reaches 0.736–0.864V window. |
| GND | Ground reference | Must be tied to exposed pad and SGND at single-point connection to minimize noise coupling. |
| PHASE | Switch node | Connects to inductor; carries high di/dt switching current - critical for EMI layout. |
| PGND | Power ground | Return path for MOSFETs and inductor; separate from SGND except at single point. |
| SGND | Analog ground | Reference for FB, EN, POR; isolated from PGND except at load return point. |
| FB | Feedback input | Senses output via resistor divider; regulates to 0.8V reference - determines VOUT = 0.8×(1+R2/R3). |
| N/C | No-connect terminal | Internally unconnected; tie to SGND to prevent floating noise pickup. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N MOSFETs | P-MOSFET RDS(on) ≤0.22Ω and N-MOSFET RDS(on) ≤0.22Ω at 200mA - eliminates external FETs and gate drivers. |
| Internal loop compensation | Fixed 25pF/400kΩ RC network - removes need for external compensation components. |
| Digital soft-start | 1.1ms typical ramp time - prevents inrush current and output overshoot during power-up. |
| Output capacitor discharge | Active discharge path through N-MOSFET when EN is low - ensures safe sequencing in multi-rail systems. |
| RoHS-compliant packaging | 100% matte tin e3 termination - compatible with both SnPb and Pb-free reflow profiles per J-STD-020. |
Applications
| FPGA Core Power Supply | Portable Test Instrumentation |
|---|---|
Use Scenario: Providing stable 1.2V/1.6V core voltage to Xilinx Spartan or Intel Cyclone FPGAs in handheld logic analyzers. IC Role / Device Role / Timing Role: Primary DC/DC POL regulator delivering tightly regulated, low-noise supply with fast transient response to handle dynamic FPGA core loading. Use Value: 1.5MHz switching and internal MOSFETs reduce solution size to <1cm² while maintaining ±3% output accuracy across temperature and load. | Use Scenario: Generating 3.3V and 2.5V rails for ADC front-ends and microcontroller peripherals in battery-powered oscilloscope modules. IC Role / Device Role / Timing Role: Dual-output-capable buck regulator (with external resistors) supplying precision analog and digital subsystems from shared Li-ion input. Use Value: 100% duty cycle extends usable battery range below 3.3V, and 200ms POR ensures clean MCU reset before firmware initialization. |
| DC/DC Plug-in Module | µP/DSP I/O Power |
Use Scenario: Embedded in hot-pluggable DC/DC modules for enterprise routers, where space and thermal performance are constrained. IC Role / Device Role / Timing Role: High-efficiency (up to 95%) step-down converter replacing discrete controllers and external FETs in modular power bricks. Use Value: 3mm×3mm DFN package with exposed thermal pad achieves 48°C/W θJA, enabling >1A operation without heatsink in confined airflow environments. | Use Scenario: Supplying 1.8V I/O voltage to ARM Cortex-M4 microcontrollers and TI C6000 DSPs in industrial edge nodes. IC Role / Device Role / Timing Role: Point-of-load regulator with enable pin for controlled power sequencing alongside core and memory rails. Use Value: Logic-compatible EN pin (0.4V low / 1.4V high thresholds) and <2µA shutdown current support deterministic wake-up and ultra-low standby power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3.0–17V input, 3A output, 2.5MHz switching, no integrated POR or capacitor discharge. | Better suited for higher-input industrial rails; lacks ISL8011IRZ's 200ms POR and active output discharge. | Select when input exceeds 5.5V or >1.2A output is required; verify external reset timing and sequencing. |
| RT8059GJ6 | 2.5–5.5V input, 1.5A output, 1.5MHz, integrated soft-start and OCP, but no POR or FB accuracy spec over full temp. | Matches input/output specs closely but omits power-good signaling and guaranteed ±3% regulation over -40°C to +85°C. | Choose for cost-sensitive designs where POR and tight line/load regulation are non-critical. |
Compared with TPS62130ARGTR and RT8059GJ6, the ISL8011IRZ uniquely combines 100% duty cycle, integrated 200ms POR, active output discharge, and ±3% output accuracy over full industrial temperature range - making it optimal for battery-powered, FPGA-centric, and sequenced multi-rail systems requiring deterministic power-up behavior.
Availability
ISL8011IRZ is available at Aetrix Electronics and suitable for FPGA core power, portable instrumentation, and plug-in DC/DC module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ISL8011IRZ 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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-efficiency DC/DC solutions and precision analog products.
The ISL8011IRZ belongs to Intersil's integrated FET synchronous buck regulator family, engineered specifically for compact, high-density point-of-load conversion in portable and space-constrained embedded systems.
FAQ
What is the maximum continuous output current specification for the ISL8011IRZ?
The ISL8011IRZ guarantees a minimum continuous output current of 1.2A across its full operating temperature range (-40°C to +85°C) and input voltage range (2.7V to 5.5V). This rating is validated under thermal conditions meeting the specified θJA of 48°C/W and assumes proper PCB copper area for the exposed thermal pad. Peak switch current limit is 2.1A, but sustained operation above 1.2A requires derating based on ambient temperature and layout.
Does the ISL8011IRZ support 100% duty-cycle operation, and what is its practical benefit?
Yes, the ISL8011IRZ supports true 100% duty-cycle operation, enabling dropout voltage less than 200mV at 1.2A load. This feature maximizes usable battery voltage range in Li-ion-powered devices - for example, allowing uninterrupted 3.3V output even as cell voltage drops to 3.5V. The P-MOSFET remains fully enhanced, eliminating switching losses and sustaining regulation without oscillation or dropout.
How does the ISL8011IRZ POR function, and what voltage thresholds trigger it?
The ISL8011IRZ POR pin outputs an open-drain low signal until the FB voltage stabilizes within the 0.736V to 0.864V window (i.e., ±8% of 0.8V reference), with a fixed 200ms delay after power-up or EN assertion. It asserts low if FB falls outside this window, providing a reliable reset signal for microprocessors. Minimum valid POR operation requires ≥1.2V supply voltage, and the POR output sinks ≥1mA at <0.3V when active.
What is the purpose of the separate SGND and PGND pins on the ISL8011IRZ, and how should they be connected?
The ISL8011IRZ separates analog (SGND) and power (PGND) grounds to isolate noise-sensitive feedback and control circuits from high di/dt switching currents. SGND must connect to PGND at exactly one point - preferably at the load's ground return - to avoid ground loops. The exposed thermal pad must be soldered directly to PGND for thermal and electrical integrity. Violating this separation causes regulation inaccuracy and instability.
Can the ISL8011IRZ be used with output voltages lower than 0.8V, and what limits this capability?
No, the ISL8011IRZ cannot regulate below 0.8V because its internal feedback reference is fixed at 0.8V. Output voltage is set by VOUT = 0.8V × (1 + R2/R3), so the lowest achievable output is 0.8V (when R2 = 0Ω and R3 = ∞). Attempting sub-0.8V operation violates the FB pin's absolute maximum rating of -0.3V and results in loss of regulation. For lower outputs, a different regulator with adjustable reference or external error amplifier is required.
ISL8011IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-VFDFN 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):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.2A
- Frequency - Switching:
- 1.6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
ISL8011IRZ FAQ
1.How can I place an order for ISL8011IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8011IRZ 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 ISL8011IRZ reliable?
The price and inventory of ISL8011IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8011IRZ is usually 5 days.
3.What payment methods are accepted for ISL8011IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8011IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8011IRZ?
ISL8011IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8011IRZ 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 ISL8011IRZ?
For technical support, including ISL8011IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8011IRZ requirements.
6.How does Aetrix verify that ISL8011IRZ is sourced from the original manufacturer or authorized distributors?
All ISL8011IRZ 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 ISL8011IRZ meets industry standards.
7.What is the process for return or replacement of ISL8011IRZ?
All ISL8011IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8011IRZ, 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 ISL8011IRZ part is unused and in its original packaging.
Return procedure for ISL8011IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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