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Renesas ISL9104AIRUDZ-T
- Part No.:
- ISL9104AIRUDZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104AIRUDZ-T.pdf
- Description:
- IC REG BUCK 2V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,569
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Product details
Overview
ISL9104AIRUDZ-T from Renesas (formerly Intersil) is a 500mA, 4.3MHz synchronous buck converter optimized for low-voltage microprocessor power in compact battery-powered devices. It delivers fixed 2.0V output from 2.7–6.0V input, features 20µA quiescent current in skip mode, 100% duty-cycle operation for <300mV dropout at 500mA, and ultrasonic skip-mode switching to eliminate audible noise - deployed in WCDMA handsets and portable instruments.
For engineers reviewing the ISL9104AIRUDZ-T datasheet, ISL9104AIRUDZ-T pinout, ISL9104AIRUDZ-T application, or ISL9104AIRUDZ-T equivalent, key selection criteria include its fixed 2.0V output, µTDFN-6 package footprint, 4.3MHz PWM frequency enabling 1µH inductors, ultrasonic PFM mode, and integrated quick-output-discharge functionality during shutdown.
Technical Context
The ISL9104AIRUDZ-T employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its dual MOSFET power stage integrates a P-channel high-side switch (0.45Ω typical RDS(on) at 3.6V) and N-channel low-side switch (0.4Ω typical), enabling up to 93% efficiency at 500mA load.
Under light load, it autonomously enters ultrasonic skip mode (PFM) - triggered after 16 consecutive zero-crossing cycles - reducing switching frequency while maintaining >1.5% output voltage regulation accuracy. The device includes internal digital soft-start, overcurrent protection with 1.0A peak limit, thermal shutdown at 130°C, and logic-controlled shutdown drawing <1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0V ±3% over line/load/temperature - eliminates external feedback resistors and ensures stable core voltage for low-power processors. |
| Max Output Current | 500mA guaranteed minimum - supports single-core microcontrollers and RF baseband ICs in handheld applications. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li+ cell (2.7–4.2V), three NiMH cells, or regulated 5V rails without external pre-regulation. |
| Switching Frequency | 4.3MHz ±0.7MHz - enables use of 1.0µH inductors and 4.7µF ceramic capacitors, reducing total solution size to <0.5cm². |
| Quiescent Current | 20µA typical in skip mode - extends battery runtime in standby/sleep states of portable electronics. |
| Shutdown Current | <1µA - ensures near-zero system leakage when powered off, critical for always-on sensor nodes. |
| Duty Cycle Range | 0–100% - supports ultra-low dropout operation (<300mV at 500mA), sustaining regulation as battery voltage declines. |
Pinout & Package
ISL9104AIRUDZ-T is housed in a Pb-free, RoHS-compliant 1.6mm × 1.6mm µTDFN-6 package with wettable flanks, optimized for space-constrained PCB layouts and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6.0V supply; requires local 4.7µF ceramic decoupling capacitor to minimize high-frequency noise injection. |
| EN (Pin 2) | Enable control | Active-high logic input; pulls internal discharge FET to rapidly bleed output capacitor when driven low - enables clean power sequencing. |
| NC (Pin 3) | No-connect | Internally unconnected; must be left floating per datasheet - no external tie or pull-up/down required. |
| FB (Pin 4) | Feedback node | Internally tied to 2.0V reference for fixed-output version; not user-accessible - eliminates external resistor divider errors and layout sensitivity. |
| GND (Pin 5) | Power ground | Primary return path for high-frequency switching currents; must be connected to solid ground plane adjacent to VIN and SW pins. |
| SW (Pin 6) | Switching node | Connects to inductor's high-side terminal; carries high di/dt square-wave voltage - requires short, wide trace to minimize EMI and voltage spikes. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip-mode operation | Eliminates audible coil whine in portable devices by shifting PFM frequency above 20kHz - confirmed for ISL9104A variants including ISL9104AIRUDZ-T. |
| Integrated quick-output-discharge | Internal N-channel bleeding FET discharges output capacitor within milliseconds of EN deactivation - prevents residual voltage from interfering with downstream logic reset timing. |
| 100% duty-cycle low-dropout mode | Maintains regulation down to VIN = VOUT + 300mV at full load - extends usable battery life in deep-discharge conditions without external LDO fallback. |
| Peak-current-mode PWM control | Provides inherent cycle-by-cycle current limiting and superior load-transient response - validated via load-step waveforms in Figures 11–22 of FN6829 Rev 5.00. |
| Thermal shutdown with hysteresis | Shuts down at 130°C junction temperature and auto-restarts at ~100°C - protects against sustained overload or poor heatsinking without requiring external thermal management. |
Applications
| Mobile Handset Power Rail | Portable Instrument Core Supply |
|---|---|
|
Use Scenario: Powers baseband processor and RF transceiver in WCDMA handsets operating from single Li+ cell. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 2.0V at up to 500mA with dynamic load handling during transmit bursts. Use Value: Ultrasonic skip mode prevents audible noise during standby; 100% duty cycle sustains operation down to 2.3V battery voltage. |
Use Scenario: Supplies FPGA configuration logic and analog front-end in handheld test equipment. IC Role / Device Role / Timing Role: Fixed-output buck converter providing low-noise, tightly regulated 2.0V rail with fast transient recovery. Use Value: 4.3MHz switching enables miniature 1.0µH inductor and 0.5cm² total footprint - critical for compact instrument enclosures. |
| MP3 Player Audio Codec Supply | PDA Application Processor Core |
|
Use Scenario: Generates clean 2.0V supply for stereo audio DAC/ADC in battery-powered MP3 players. IC Role / Device Role / Timing Role: Low-IQ buck regulator minimizing quiescent drain during music playback pause states. Use Value: 20µA skip-mode IQ extends battery life by >15% versus comparable 100µA solutions in intermittent-use scenarios. |
Use Scenario: Powers ARM-based application processor core in palm-sized PDAs with dynamic voltage scaling. IC Role / Device Role / Timing Role: High-efficiency synchronous buck delivering 500mA peak current with soft-start controlled ramp-up. Use Value: Internal digital soft-start limits inrush current to prevent brownout on shared battery rail during cold boot sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 2.0V output, 4MHz switching, 300mA rated - lower current capability and no ultrasonic PFM mode. | Suitable for lower-power MCU rails but cannot support 500mA burst loads typical in WCDMA handsets. | Select ISL9104AIRUDZ-T when 500mA continuous output and ultrasonic noise suppression are required. |
| RT8059GJ6 | Fixed 2.0V output, 3MHz switching, 600mA rated - higher current but lacks quick-output-discharge and has 35µA skip-mode IQ. | Better for high-current apps but less optimal for battery-sensitive portable instruments needing rapid rail collapse. | Choose ISL9104AIRUDZ-T where sub-1µA shutdown current and controlled discharge timing are critical. |
Compared with TPS62231DRYR and RT8059GJ6, ISL9104AIRUDZ-T uniquely combines 500mA capability, ultrasonic skip mode, <1µA shutdown, and integrated output discharge - making it the only option meeting all four requirements simultaneously in space-constrained portable designs.
Availability
ISL9104AIRUDZ-T is available at Aetrix Electronics and suitable for mobile handset power rails, portable instrument core supplies, MP3 player audio codec rails, and PDA application processor cores requiring stable component supply with consistent parametric performance and long-term lifecycle support.
Supply support for ISL9104AIRUDZ-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 Corporation (acquired Intersil in 2017) is a global leader in high-performance analog and mixed-signal semiconductors, specializing in power management and interface solutions for mobile, industrial, and automotive markets.
The ISL9104A family was designed specifically for ultra-compact, battery-powered handheld devices requiring high efficiency at light loads, silent operation, and minimal external component count - targeting next-generation cellular phones and portable instrumentation.
FAQ
What is the output voltage of the ISL9104AIRUDZ-T and is it adjustable?
The ISL9104AIRUDZ-T provides a fixed 2.0V output with ±3% accuracy over line, load, and temperature. It is not adjustable - the FB pin is internally connected to the 2.0V reference, eliminating external resistor dividers. This simplifies design, improves stability, and reduces bill-of-materials cost compared to adjustable variants like ISL9104AIRUAZ-T.
Does the ISL9104AIRUDZ-T support ultrasonic operation to avoid audible noise?
Yes, the ISL9104AIRUDZ-T - as an ISL9104A-series part - includes ultrasonic skip-mode (PFM) operation. When entering light-load mode, it maintains switching frequencies above 20kHz to prevent audible coil whine, a critical feature confirmed in the datasheet's "Features" section and ordering table (ULTRASONIC FUNCTION = YES).
What is the maximum output current capability of the ISL9104AIRUDZ-T?
The ISL9104AIRUDZ-T guarantees a minimum output current of 500mA across the full operating temperature range (-40°C to +85°C). This is validated under worst-case conditions including 2.7V input and elevated ambient temperature, ensuring reliable operation in demanding portable applications such as WCDMA handset baseband power.
How does the ISL9104AIRUDZ-T handle shutdown and output capacitor discharge?
When the EN pin is driven low, the ISL9104AIRUDZ-T disables both internal MOSFETs and activates an internal N-channel bleeding FET connected to the output. This discharges the output capacitor rapidly - typically within milliseconds - ensuring clean power-down behavior and preventing residual voltage from interfering with system reset sequencing.
What package type and footprint does the ISL9104AIRUDZ-T use?
The ISL9104AIRUDZ-T uses a 1.6mm × 1.6mm µTDFN-6 package (PKG DWG. # L6.1.6x1.6) with exposed thermal pad. It is Pb-free and RoHS-compliant, featuring wettable flanks for reliable solder-joint inspection. The compact footprint supports high-density layouts in space-constrained mobile and portable designs.
ISL9104AIRUDZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 6-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 4.3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UTDFN (1.6x1.6)
ISL9104AIRUDZ-T FAQ
1.How can I place an order for ISL9104AIRUDZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104AIRUDZ-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 ISL9104AIRUDZ-T reliable?
The price and inventory of ISL9104AIRUDZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104AIRUDZ-T is usually 5 days.
3.What payment methods are accepted for ISL9104AIRUDZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104AIRUDZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104AIRUDZ-T?
ISL9104AIRUDZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104AIRUDZ-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 ISL9104AIRUDZ-T?
For technical support, including ISL9104AIRUDZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104AIRUDZ-T requirements.
6.How does Aetrix verify that ISL9104AIRUDZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9104AIRUDZ-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 ISL9104AIRUDZ-T meets industry standards.
7.What is the process for return or replacement of ISL9104AIRUDZ-T?
All ISL9104AIRUDZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104AIRUDZ-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 ISL9104AIRUDZ-T part is unused and in its original packaging.
Return procedure for ISL9104AIRUDZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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