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Renesas ISL8009AIRZ-TK
- Part No.:
- ISL8009AIRZ-TK
- Manufacturer:
- Renesas
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
ISL8009AIRZ-TK.pdf
- Description:
- IC REG BUCK ADJ 1.5A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,379
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Product details
Overview
ISL8009AIRZ-TK from Renesas (formerly Intersil) is a monolithic synchronous buck DC/DC regulator delivering up to 1.5A continuous output current with 0.8V minimum output voltage, 2.7V–5.5V input range, and 1.6MHz fixed-frequency PWM operation. It integrates P- and N-channel MOSFETs with 120mΩ/110mΩ typical RDS(on), supports forced-PWM or automatic PFM/PWM mode, and targets portable power rails for microcontrollers and FPGAs.
For engineers reviewing the ISL8009AIRZ-TK datasheet, ISL8009AIRZ-TK pinout, ISL8009AIRZ-TK application, or ISL8009AIRZ-TK equivalent, key selection criteria include its 17µA quiescent current in PFM mode, 2ms POR timer with RSI reset capability, 90% max duty cycle for low dropout, internal soft-start, and thermal shutdown at 140°C - all in a space-constrained 2mm×3mm DFN package.
Technical Context
The ISL8009AIRZ-TK employs current-mode PWM control with integrated slope compensation for fast transient response and stable loop behavior across load and line variations. Its dual-MOSFET architecture enables high-efficiency regulation down to 0.8V while maintaining <3% output accuracy over temperature, load, and line.
Operation includes selectable modes: forced PWM (SKIP = GND) ensures constant 1.6MHz switching for EMI-sensitive designs, while automatic PFM/PWM (SKIP = VIN) reduces quiescent current to 17µA under light loads. The device features internal digital soft-start, peak current limiting (2.1A typ), and short-circuit protection via VFB monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5A continuous - sufficient for core logic rails of mid-tier µCs and FPGA I/O banks. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single Li+ cell, three NiMH cells, or regulated 5V supplies. |
| Switching Frequency | 1.6MHz (typ) - enables use of compact 2.2µH inductors and 20µF ceramic output capacitors. |
| Quiescent Current | 17µA in PFM mode - extends battery runtime in always-on portable instrumentation. |
| Feedback Reference | 0.8V ±2% - sets output voltage via external resistor divider; supports 0.8V–3.6V adjustable range. |
| Duty Cycle Limit | 90% maximum - achieves <400mV dropout at 1.5A, critical for low-VIN battery brownout conditions. |
| Thermal Shutdown | 140°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
The ISL8009AIRZ-TK is housed in an 8-lead 2mm×3mm DFN package (L8.2x3) with exposed thermal pad requiring direct connection to PCB ground plane for electrical integrity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 2.7–5.5V; requires 10µF ceramic decoupling capacitor to GND. |
| EN | Enable control input | Active-high logic; enables regulation and initiates soft-start; pulls LX to GND via 100Ω when low. |
| POR | Power-On-Reset output | Open-drain 2ms delayed Power-Good signal; resettable by RSI; requires external pull-up. |
| SKIP | Mode selection input | High = auto PFM/PWM; Low = forced PWM; floating not allowed. |
| LX | Switch node | Connects to inductor; carries high di/dt switching current; must be routed with minimal loop area. |
| GND | Power and signal ground | Reference for all circuitry; exposed pad must be soldered to GND plane for thermal/electrical performance. |
| VFB | Feedback input | Senses output voltage via resistor divider; 0.8V reference enables precise regulation. |
| RSI | Reset input | Active-low signal that resets POR timer; must be pulled to GND if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | P-Channel (120mΩ) and N-Channel (110mΩ) switches eliminate external power devices and reduce BOM count. |
| Low-IQ PFM Mode | 17µA quiescent current preserves battery life in standby without sacrificing startup speed. |
| 2ms POR Timer | Provides system-level power sequencing signal with RSI-triggered reset for flexible reset management. |
| Internal Soft-Start | Digital ramp limits inrush current and controls output voltage rise time to prevent overshoot. |
| Overcurrent Protection | Peak current limit at 2.1A (typ) with hiccup-style recovery prevents damage during sustained overload. |
| Thermal Shutdown | 140°C trip with 25°C hysteresis ensures safe operation under thermal stress without latch-up. |
Applications
| Portable Instrumentation Power | µC/FPGA Core Rail Supply |
|---|---|
|
Use Scenario: Battery-powered handheld test equipment requiring stable 1.2V or 1.8V supply with long operational life. IC Role / Device Role / Timing Role: Primary step-down regulator converting single Li+ cell (3.0–4.2V) to low-noise logic rail. Use Value: 17µA PFM quiescent current extends battery runtime; 1.6MHz switching minimizes passive size for compact enclosure. |
Use Scenario: Power delivery to ARM Cortex-M or Xilinx Spartan FPGA core voltage domains in embedded edge nodes. IC Role / Device Role / Timing Role: Point-of-load (POL) converter providing tightly regulated 0.8–1.2V at up to 1.5A with fast transient response. Use Value: Current-mode control delivers <5% output deviation during 1A load steps; 90% duty cycle maintains regulation during battery sag. |
| DC/DC Plug-in Module | Routers & Switches POL Subsystem |
|
Use Scenario: Compact, drop-in DC/DC module for field-replaceable cards in telecom infrastructure. IC Role / Device Role / Timing Role: Monolithic buck controller enabling <1cm² total solution size with minimal external components. Use Value: 2mm×3mm DFN package and integrated MOSFETs reduce footprint vs discrete solutions; RoHS-compliant Pb-free finish meets IPC/JEDEC reflow standards. |
Use Scenario: Secondary power rail generation on line-card PCBs where space and thermal density are constrained. IC Role / Device Role / Timing Role: High-efficiency POL regulator supplying 1.5V or 2.5V to switch fabric or PHY interfaces. Use Value: 95% peak efficiency at full load reduces board-level heat; thermal pad + 5-via grounding ensures reliable operation at 85°C ambient. |
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, 17µA IQ; larger 3mm×3mm QFN package. | Better suited for higher-input industrial rails; less optimal for sub-3V battery inputs. | Select when input exceeds 5.5V or >1.5A output is required; verify layout compatibility with larger footprint. |
| MP2143GJ-Z | 4.5–28V input, 3A output, 1.5MHz, 25µA IQ; no integrated POR/RSI functionality. | Lacks dedicated reset timing and RSI interface; requires external POR circuitry for sequencing. | Choose for cost-sensitive high-VIN applications where reset signaling is handled externally or omitted. |
Compared with ISL8009AIRZ-TK, TPS62130ARGTR offers wider VIN and higher current but sacrifices battery-friendly 2.7V start-up and integrated POR; MP2143GJ-Z provides higher VIN tolerance but omits critical power-sequencing features needed in portable systems.
Availability
ISL8009AIRZ-TK is available at Aetrix Electronics and suitable for portable instrumentation, µC/FPGA power rails, and DC/DC plug-in modules requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for ISL8009AIRZ-TK 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 its high-performance analog and power management portfolio with rigorous quality systems (ISO 9001 certified).
The ISL8009AIRZ-TK belongs to Renesas' precision DC/DC regulator family designed specifically for space-constrained, battery-operated applications demanding high efficiency, low quiescent current, and robust power sequencing.
FAQ
What is the recommended input capacitor for ISL8009AIRZ-TK?
A 10µF X5R or X7R ceramic capacitor placed close to the VIN and GND pins is recommended per the datasheet. This value provides effective high-frequency decoupling and suppresses switching noise injection into the input source, especially critical when powered from a battery or shared rail. Larger values may improve ripple but are unnecessary for stability; ensure capacitor voltage rating exceeds maximum VIN (5.5V).
Does ISL8009AIRZ-TK support adjustable output voltage?
Yes, ISL8009AIRZ-TK supports adjustable output voltage from 0.8V to 3.6V using an external resistor divider on the VFB pin. The internal 0.8V reference sets VOUT = 0.8V × (1 + R2/R3). For fixed-output variants, VFB connects directly to the output. Resistor selection must balance accuracy (limiting R3 ≤ 200kΩ to minimize leakage error) and quiescent current (higher R values reduce divider current).
How does the SKIP pin affect ISL8009AIRZ-TK operation?
The SKIP pin selects between two operating modes: when pulled high (to VIN), ISL8009AIRZ-TK enters automatic PFM/PWM mode for optimal light-load efficiency (17µA IQ); when pulled low (to GND), it forces continuous PWM mode at 1.6MHz for predictable EMI and consistent transient response. Leaving SKIP floating is prohibited and may cause erratic behavior.
What thermal management is required for ISL8009AIRZ-TK at 1.5A load?
At 1.5A output and 5V input, ISL8009AIRZ-TK dissipates ~0.3W. To maintain junction temperature below 125°C in +85°C ambient, the PCB must provide adequate thermal conduction: the exposed pad must be soldered to a solid GND plane with ≥5 thermal vias (0.3mm diameter) connecting to inner/ground layers. Thermal resistance θJA is 55°C/W; reducing θJA via copper area lowers operating temperature significantly.
Can ISL8009AIRZ-TK safely discharge its output during shutdown?
Yes - when EN is driven low, ISL8009AIRZ-TK activates an internal 100Ω resistor between LX and GND, actively discharging the output capacitor to near-zero voltage within milliseconds. This prevents residual voltage from interfering with downstream logic sequencing or causing latch-up in powered-off sections of the system, a critical feature for multi-rail power architectures.
ISL8009AIRZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 1.5A
- Frequency - Switching:
- 1.6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
ISL8009AIRZ-TK FAQ
1.How can I place an order for ISL8009AIRZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8009AIRZ-TK 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 ISL8009AIRZ-TK reliable?
The price and inventory of ISL8009AIRZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8009AIRZ-TK is usually 5 days.
3.What payment methods are accepted for ISL8009AIRZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8009AIRZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8009AIRZ-TK?
ISL8009AIRZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8009AIRZ-TK 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 ISL8009AIRZ-TK?
For technical support, including ISL8009AIRZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8009AIRZ-TK requirements.
6.How does Aetrix verify that ISL8009AIRZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL8009AIRZ-TK 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 ISL8009AIRZ-TK meets industry standards.
7.What is the process for return or replacement of ISL8009AIRZ-TK?
All ISL8009AIRZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL8009AIRZ-TK, 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 ISL8009AIRZ-TK part is unused and in its original packaging.
Return procedure for ISL8009AIRZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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