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Renesas ISL8009BIRZ-T
- Part No.:
- ISL8009BIRZ-T
- Manufacturer:
- Renesas
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
ISL8009BIRZ-T.pdf
- Description:
- IC REG BUCK 1.5A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,295
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Product details
Overview
ISL8009BIRZ-T from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 1.5A continuous output current with 0.8V to 3.3V adjustable output voltage, 1.6MHz fixed switching frequency, and 17µA quiescent current in PFM mode. It integrates low-RDS(on) P- and N-channel MOSFETs (120mΩ/110mΩ typ), supports 2.7V–5.5V input, and targets battery-powered µC/FPGA power rails.
For engineers reviewing the ISL8009BIRZ-T datasheet, ISL8009BIRZ-T pinout, ISL8009BIRZ-T application, or ISL8009BIRZ-T equivalent, key selection criteria include light-load efficiency via PFM/PWM mode select, 2ms POR timer with RSI reset, soft-discharge on shutdown, thermal shutdown at 140°C, and DFN-8 (2mm×3mm) package compatibility with space-constrained portable designs.
Technical Context
The ISL8009BIRZ-T employs current-mode PWM control with internal slope compensation for fast transient response and stable loop behavior across 0–1.5A load range. Its dual-MOSFET architecture enables 90% max duty cycle operation, achieving <400mV dropout at 1.5A output.
Operation mode is selected via the SKIP pin: logic low forces continuous PWM (1.6MHz), while logic high enables automatic PFM mode with dynamic frequency reduction below 17µA quiescent current. The integrated 2ms POR timer provides synchronized power-good signaling, resettable by the RSI input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5A continuous - supports FPGA core rail and µP I/O supply without external boost stages. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single Li⁺, three NiMH, or regulated 5V sources. |
| Quiescent Current | 17µA in PFM mode - extends battery runtime in always-on sensor nodes and portable instruments. |
| Switching Frequency | 1.6MHz (±12.5%) - enables use of compact 2.2µH inductors and 20µF ceramic output capacitors. |
| Feedback Reference | 0.8V ±2% - sets output voltage via resistor divider; supports 0.8V–3.3V adjustment with ±3% total accuracy over temp/load/line. |
| Duty Cycle Limit | 90% maximum - ensures <400mV dropout at 1.5A, critical for low-VIN battery brownout survival. |
| Thermal Shutdown | 140°C activation with 25°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
ISL8009BIRZ-T is housed in an 8-lead 2mm×3mm DFN package (L8.2x3) with exposed thermal pad requiring direct connection to GND for electrical integrity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 2.7V–5.5V; requires 10µF ceramic decoupling capacitor placed adjacent to pin. |
| EN | Enable control input | Active-high logic; enables regulation and initiates soft-start; pulls LX to GND via 100Ω during shutdown. |
| POR | Power-On-Reset open-drain output | 2ms delayed active-low signal indicating valid VOUT; resettable by RSI; requires external pull-up for Power-Good function. |
| SKIP | Mode selection input | Logic high = auto PFM/PWM; logic low = forced PWM; floating not allowed. |
| LX | Switching node | Connects to inductor; carries high di/dt; must be routed with minimal loop area to reduce EMI. |
| GND | System ground reference | Primary return path; exposed pad must be soldered to GND plane for thermal and electrical performance. |
| VFB | Feedback input | Senses output voltage via resistor divider; 0.8V reference enables precise output setting; leakage <0.1µA. |
| RSI | Reset input | Active-low asynchronous reset for POR timer; must be pulled to GND if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-MOSFETs | 120mΩ/110mΩ typical RDS(on) - eliminates external switches, reduces BOM count, and improves full-load efficiency to 95%. |
| PFM/PWM Mode Select | Configurable via SKIP pin - maintains >85% efficiency down to 10mA load in PFM, avoids audible noise in PWM-only systems. |
| Digital Soft-Start | 1.1ms ramp time - prevents inrush current into output caps; supports pre-biased startup without reverse current. |
| Overcurrent Protection | Peak current limit at 2.1A - protects internal MOSFETs during short-circuit or overload; latches off after repeated faults. |
| Soft-Discharge Function | 100Ω internal discharge path from LX to GND - safely discharges output cap during shutdown, preventing backfeed into powered-down circuitry. |
Applications
| DC/DC POL Modules | µC/µP and FPGA Core Power |
|---|---|
Use Scenario: Point-of-load conversion in compact embedded modules where board space and thermal density are constrained. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated 1.2V/1.5V core voltage with fast load-step response. Use Value: 1.6MHz switching allows sub-1cm² solution size; 17µA quiescent current minimizes standby power loss in sleep-mode operation. |
Use Scenario: Powering ARM Cortex-M or RISC-V microcontrollers and small FPGA fabric in portable test equipment. IC Role / Device Role / Timing Role: Adjustable-output DC/DC converter delivering 0.8V–1.8V at up to 1.5A with programmable enable sequencing. Use Value: Internal soft-start and POR timer ensure deterministic power-up timing; 90% duty cycle sustains regulation during Li⁺ battery discharge to 2.8V. |
| Plug-in DC/DC Modules for Routers | Portable Instruments |
Use Scenario: Hot-pluggable 5V-input DC/DC modules supplying 3.3V I/O rails in enterprise networking hardware. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with enable-controlled power sequencing and fault reporting via POR. Use Value: Forced PWM mode eliminates frequency variation under variable load, simplifying EMI filtering; thermal shutdown prevents field failures during airflow blockage. |
Use Scenario: Battery-powered handheld oscilloscopes and multimeters requiring ultra-low standby current and clean analog supply rails. IC Role / Device Role / Timing Role: Main system regulator converting single-cell Li⁺ to multiple precision analog/digital voltages. Use Value: PFM mode achieves <20µA system idle current; 3% output accuracy ensures ADC reference stability across temperature and line variations. |
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 | 3.0V–17V input range; 3A output; 2.5MHz switching; no integrated POR or RSI reset. | Better suited for wide-input industrial supplies; lacks dedicated power-good signaling and reset coordination. | Choose when higher input voltage or output current is required, and POR/RSI functionality is not needed. |
| MP2143GJ-Z | 4.5V–17V input; 3A output; 1.2MHz switching; no PFM mode; 25µA quiescent current in forced PWM. | Designed for higher-VIN applications; no light-load efficiency optimization; no soft-discharge feature. | Select for cost-sensitive 12V-input systems where 17µA PFM efficiency is unnecessary and thermal margin is ample. |
Compared with TPS62130ARGTR and MP2143GJ-Z, the ISL8009BIRZ-T delivers superior light-load efficiency and integrated power sequencing features (POR, RSI, soft-discharge) in a smaller 2mm×3mm footprint-making it optimal for space- and battery-life-constrained portable designs operating from 2.7V–5.5V inputs.
Availability
ISL8009BIRZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA core power, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8009BIRZ-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 legacy of high-performance analog and power management ICs for industrial, automotive, and computing markets.
The ISL8009BIRZ-T belongs to Renesas' low-quiescent-current synchronous buck regulator product line, engineered specifically for battery-powered portable electronics demanding high efficiency across full load range and robust power sequencing capability.
FAQ
What is the maximum output current capability of the ISL8009BIRZ-T?
The ISL8009BIRZ-T delivers up to 1.5A continuous output current across its full operating temperature range (-40°C to +85°C). This rating is guaranteed with proper thermal management-specifically, connecting the exposed pad to a sufficient GND copper area-and using recommended external components (2.2µH inductor, 20µF output capacitors). Peak current limit is 2.1A, providing headroom for transient loads without triggering protection.
Does the ISL8009BIRZ-T support adjustable output voltage?
Yes, the ISL8009BIRZ-T supports adjustable output voltage from 0.8V to 3.3V using an external resistor divider connected to the VFB pin. The internal reference is precisely trimmed to 0.8V ±2%, and total output accuracy remains within ±3% over temperature, line, and load conditions. For fixed-output variants, the feedback network is internal; the ISL8009BIRZ-T is the adjustable version requiring external resistors R2 and R3 per Equation 2 in the datasheet.
How does the SKIP pin affect ISL8009BIRZ-T operation?
The SKIP pin selects between two distinct operating modes: logic high (or VIN) enables automatic PFM/PWM mode, reducing switching frequency under light load to achieve 17µA quiescent current; logic low forces continuous PWM mode at 1.6MHz regardless of load, eliminating frequency modulation artifacts and ensuring predictable EMI behavior. Leaving SKIP floating is prohibited-it must be actively driven or tied to a defined voltage level.
What thermal protection features does the ISL8009BIRZ-T include?
The ISL8009BIRZ-T incorporates thermal shutdown that activates at +140°C junction temperature and resumes operation only after cooling to +120°C (25°C hysteresis). This protects against sustained overload, inadequate PCB copper, or ambient overheating. Thermal resistance is θJA = 55°C/W and θJC = 5.5°C/W in the 2mm×3mm DFN package-achievable thermal performance requires soldering the exposed pad directly to a solid GND plane with ≥5 thermal vias.
Can the ISL8009BIRZ-T safely discharge its output capacitor during shutdown?
Yes, the ISL8009BIRZ-T includes an internal 100Ω soft-discharge resistor between the LX pin and GND, activated automatically when the EN pin is driven low. This safely bleeds the output capacitor to near-zero voltage within milliseconds, preventing backfeed into downstream circuitry and enabling safe hot-swap or power-sequence compliance. Discharge can be disabled via the soft-discharge disable feature if required for specific system architectures.
ISL8009BIRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
ISL8009BIRZ-T FAQ
1.How can I place an order for ISL8009BIRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8009BIRZ-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 ISL8009BIRZ-T reliable?
The price and inventory of ISL8009BIRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8009BIRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8009BIRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8009BIRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8009BIRZ-T?
ISL8009BIRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8009BIRZ-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 ISL8009BIRZ-T?
For technical support, including ISL8009BIRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8009BIRZ-T requirements.
6.How does Aetrix verify that ISL8009BIRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8009BIRZ-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 ISL8009BIRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8009BIRZ-T?
All ISL8009BIRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8009BIRZ-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 ISL8009BIRZ-T part is unused and in its original packaging.
Return procedure for ISL8009BIRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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