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Renesas ISL9104AIRUFZ-T
- Part No.:
- ISL9104AIRUFZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104AIRUFZ-T.pdf
- Description:
- IC REG BUCK 2.5V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,609
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Product details
Overview
ISL9104AIRUFZ-T from Renesas Electronics (formerly Intersil) is a 500mA, 4.3MHz synchronous buck converter optimized for low-voltage microprocessor power in compact battery-powered devices. It delivers a fixed 2.5V output with ±3% accuracy, operates from 2.7V–6.0V input, and achieves up to 93% efficiency at 500mA load - enabling extended runtime in WCDMA handsets and portable instruments.
For engineers reviewing the ISL9104AIRUFZ-T datasheet, ISL9104AIRUFZ-T pinout, ISL9104AIRUFZ-T application, or ISL9104AIRUFZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters including 20µA quiescent current in skip mode, and real-world application constraints for Li+-powered systems.
Technical Context
The ISL9104AIRUFZ-T uses peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its integrated P-Channel (0.45Ω typ) and N-Channel (0.4Ω typ) MOSFETs enable high-efficiency regulation down to 0.8V output, while 100% duty-cycle operation supports ultra-low dropout (<300mV at 500mA).
Under light load, it automatically enters ultrasonic skip mode (PFM) - unique to the ISL9104A variant - suppressing audible noise by avoiding sub-20kHz switching. The device includes internal digital soft-start, logic-controlled shutdown (<1µA), output capacitor discharge on disable, and thermal shutdown at 130°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over line, load, and temperature - ensures stable core voltage for 2.5V I/O domains without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum - sufficient to power ARM Cortex-M4 microcontrollers or baseband processors in mobile handsets. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li+ cell (2.7–4.2V), three NiMH cells, or regulated 5V rails. |
| Switching Frequency | 4.3MHz typical (3.6–4.9MHz range) - enables use of 1.0µH inductors and 4.7µF ceramic capacitors, minimizing PCB area to <0.5cm². |
| Quiescent Current | 20µA typical in skip mode - maximizes battery life in standby states of portable instrumentation and MP3 players. |
| Duty Cycle | 100% maximum - maintains regulation under low-input conditions (e.g., Li+ cell at 2.8V delivering 2.5V @ 500mA) with <300mV dropout. |
| Shutdown Current | <1µA - meets stringent system-level power gating requirements for always-on sensor nodes. |
Pinout & Package
ISL9104AIRUFZ-T is housed in a Pb-free, RoHS-compliant 6-pin µTDFN package measuring 1.6mm × 1.6mm × 0.55mm, with exposed thermal pad for enhanced heat dissipation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6.0V supply; requires local 4.7µF ceramic decoupling to GND to suppress high-frequency switching noise. |
| EN (Pin 2) | Enable control | Active-high logic input; pulls internal discharge FET to bleed output capacitor when driven low - critical for safe power sequencing. |
| NC (Pin 3) | No connect | Internally unconnected; must be left floating - no external tie required or recommended. |
| FB (Pin 4) | Feedback reference | Internally tied to 2.5V output for fixed-version operation; not accessible for adjustment - eliminates resistor divider errors. |
| GND (Pin 5) | Ground reference | Primary return path for power and signal; must be connected to solid ground plane adjacent to VIN and SW pins to minimize EMI. |
| SW (Pin 6) | Switch node | Connects to inductor's high-side terminal; carries high di/dt square wave - requires short, wide trace routing away from sensitive analog paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip mode | Exclusive to ISL9104A variants - eliminates audible coil whine in handheld audio devices by keeping PFM frequency >20kHz. |
| Integrated MOSFETs | P-Channel (0.45Ω) + N-Channel (0.4Ω) switches reduce BOM count and improve efficiency vs. external-FET solutions. |
| Output capacitor discharge | Internal bleeding FET discharges VOUT to <100mV within 1ms of EN deactivation - prevents latch-up in multi-rail systems. |
| 100% duty-cycle operation | Enables dropout <300mV at full 500mA load - extends usable battery voltage range down to 2.8V for 2.5V output. |
| Thermal protection | Auto-shutdown at 130°C with 30°C hysteresis - prevents damage during sustained overload or poor heatsinking in sealed enclosures. |
Applications
| Mobile Handset Power | Portable Instrument Core Supply |
|---|---|
|
Use Scenario: Powering baseband processor and RF transceiver in WCDMA handsets using single Li+ cell. IC Role / Device Role / Timing Role: Primary step-down regulator delivering clean, stable 2.5V rail with fast load transient response. Use Value: 4.3MHz switching minimizes inductor size; ultrasonic skip mode prevents audible noise during voice calls. |
Use Scenario: Supplying microcontroller and ADC in handheld multimeters or gas detectors. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter providing low-noise 2.5V reference for precision analog front-ends. Use Value: ±3% output accuracy and <1µA shutdown current ensure measurement stability and long battery life. |
| MP3 Player Audio Codec | PDAs and Palmtops System Rail |
|
Use Scenario: Generating 2.5V bias for stereo DAC and headphone amplifier in flash-based MP3 players. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting dynamic audio playback current bursts up to 500mA. Use Value: 93% peak efficiency and 20µA skip-mode IQ extend playback time beyond 20 hours on 500mAh battery. |
Use Scenario: Powering ARM9 application processor and LCD controller in legacy PDAs with tight board area. IC Role / Device Role / Timing Role: Compact 1.6×1.6mm µTDFN regulator replacing discrete solutions to meet 0.5cm² footprint constraint. Use Value: Integrated soft-start prevents inrush current damage to aging Li+ cells; 100% duty cycle sustains operation until battery reaches 2.7V. |
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 | 3MHz switching, 300mA output, 2.5V fixed, 17µA IQ - smaller current rating and lower frequency limit inductor size flexibility. | Lacks ultrasonic skip mode and output discharge; less suitable for noise-sensitive audio or strict sequencing systems. | Prefer for cost-sensitive, lower-current applications where 300mA suffices and audible noise is not a concern. |
| MAX8640YETA+ | 2.25MHz switching, 600mA output, 2.5V fixed, 25µA IQ - higher current but no ultrasonic PFM; thermal shutdown at 150°C. | Requires external soft-start capacitor; no integrated output bleed FET - adds complexity for safe power-down. | Choose when higher output current is needed and board layout allows larger inductor; verify thermal margin in enclosed enclosures. |
Compared with TPS62231DRYR and MAX8640YETA+, the ISL9104AIRUFZ-T uniquely combines ultrasonic skip mode, integrated output discharge, and 100% duty-cycle operation in a 1.6×1.6mm package - making it optimal for space-constrained, battery-powered audio and communication devices requiring silent, sequenced, and low-dropout regulation.
Availability
ISL9104AIRUFZ-T is available at Aetrix Electronics and suitable for mobile handset power, portable instrument core supply, MP3 player audio codec, and PDA system rail applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9104AIRUFZ-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 is a global leader in high-performance analog and power management semiconductors, formed through the acquisition of Intersil in 2017. The company serves automotive, industrial, and consumer markets with robust, qualified silicon.
The ISL9104AIRUFZ-T belongs to Renesas' legacy Intersil high-efficiency DC/DC converter family, designed specifically for ultra-compact, battery-powered portable electronics demanding low IQ, small solution size, and reliable power sequencing.
FAQ
What is the output voltage tolerance of the ISL9104AIRUFZ-T over temperature and line variations?
The ISL9104AIRUFZ-T provides a fixed 2.5V output with ±3% accuracy across the full operating temperature range (-40°C to +85°C) and input voltage range (2.7V to 6.0V). This specification is guaranteed in PWM mode and applies to all production units - ensuring consistent performance for 2.5V I/O interfaces without external trimming components. The ISL9104AIRUFZ-T achieves this via factory-trimmed internal feedback, eliminating resistor-divider drift.
Does the ISL9104AIRUFZ-T support ultrasonic operation in skip mode, and how is it enabled?
Yes, the ISL9104AIRUFZ-T - as an ISL9104A-series part - features ultrasonic skip mode that keeps switching frequency above 20kHz under light loads, preventing audible coil whine. This function is inherent to the ISL9104A die and requires no external configuration; it activates automatically when load current drops below ~10mA. The ISL9104AIRUFZ-T implements this behavior without user intervention or additional pins.
How does the ISL9104AIRUFZ-T handle output capacitor discharge during shutdown?
When the EN pin is pulled low, the ISL9104AIRUFZ-T activates an internal N-channel bleeding MOSFET (100Ω typical ON-resistance) between the FB/SW node and GND. This discharges the output capacitor to <100mV within 1ms, preventing back-powering of upstream circuitry and enabling safe, controlled power sequencing in multi-rail systems. This feature is exclusive to the ISL9104A series and is fully integrated in the ISL9104AIRUFZ-T.
What is the minimum input voltage required for the ISL9104AIRUFZ-T to maintain 2.5V output at 500mA?
The ISL9104AIRUFZ-T supports 100% duty-cycle operation, allowing it to sustain 2.5V output down to an input voltage of approximately 2.8V at 500mA load - calculated as VOUT + (IOUT × RDS(ON)_PCH) + IL × DCR_L. With its 0.45Ω P-Channel MOSFET and typical 60mΩ inductor DCR, dropout remains below 300mV. Below 2.8V, regulation is lost, but the device continues linear operation until UVLO triggers at 2.5V.
Can the ISL9104AIRUFZ-T be used with ceramic output capacitors, and what value is recommended?
Yes, the ISL9104AIRUFZ-T is optimized for ceramic output capacitors due to their low ESR. A 4.7µF/6.3V X5R or X7R ceramic capacitor is recommended and validated in the datasheet for stable operation and minimal output ripple. This value supports both steady-state regulation and transient response across the full 0–500mA load range, and fits standard 0603 footprints - matching the compact 1.6×1.6mm package of the ISL9104AIRUFZ-T.
ISL9104AIRUFZ-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):
- 2.5V
- 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)
ISL9104AIRUFZ-T FAQ
1.How can I place an order for ISL9104AIRUFZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104AIRUFZ-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 ISL9104AIRUFZ-T reliable?
The price and inventory of ISL9104AIRUFZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104AIRUFZ-T is usually 5 days.
3.What payment methods are accepted for ISL9104AIRUFZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104AIRUFZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104AIRUFZ-T?
ISL9104AIRUFZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104AIRUFZ-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 ISL9104AIRUFZ-T?
For technical support, including ISL9104AIRUFZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104AIRUFZ-T requirements.
6.How does Aetrix verify that ISL9104AIRUFZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9104AIRUFZ-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 ISL9104AIRUFZ-T meets industry standards.
7.What is the process for return or replacement of ISL9104AIRUFZ-T?
All ISL9104AIRUFZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104AIRUFZ-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 ISL9104AIRUFZ-T part is unused and in its original packaging.
Return procedure for ISL9104AIRUFZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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