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Renesas ISL9104AIRUNZ-T7A
- Part No.:
- ISL9104AIRUNZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104AIRUNZ-T7A.pdf
- Description:
- IC REG BUCK 3.3V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:311
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Product details
Overview
ISL9104AIRUNZ-T7A 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 fixed 3.3V output from 2.7V–6.0V input, features 20µA quiescent current in skip mode, 100% duty-cycle operation for <300mV dropout at 500mA, and ultrasonic switching to eliminate audible noise. It powers baseband processors in WCDMA handsets.
For engineers reviewing the ISL9104AIRUNZ-T7A datasheet, ISL9104AIRUNZ-T7A pinout, ISL9104AIRUNZ-T7A application, or ISL9104AIRUNZ-T7A equivalent, key selection criteria include fixed 3.3V output with ±3% accuracy, ultrasonic PFM mode, integrated P/N-MOSFETs with 0.45Ω/0.4Ω ON-resistance, thermal shutdown at 130°C, and 1.6×1.6mm µTDFN-6 package compatibility with space-constrained mobile PCB layouts.
Technical Context
The ISL9104AIRUNZ-T7A employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its architecture integrates a 0.8V bandgap reference, transconductance error amplifier, and zero-cross sensing circuit enabling automatic transition between fixed-frequency 4.3MHz PWM and ultrasonic skip mode.
It implements 100% duty-cycle low-dropout operation using an internal P-channel high-side switch, supports logic-controlled enable with <1µA shutdown current, and includes dedicated bleeding FET (100Ω) to discharge the output capacitor upon disable-critical for system-level power sequencing in portable electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% over temperature and line-ensures stable core voltage for 3.3V I/O interfaces without external feedback resistors. |
| Switching Frequency | 4.3MHz typical (3.6–4.9MHz range)-enables use of 1.0µH inductor and 4.7µF ceramic capacitors, reducing solution size to <0.5cm². |
| Max Output Current | 500mA guaranteed minimum-supports baseband processors and RF ICs in single-cell Li-ion systems. |
| Quiescent Current | 32µA typical in skip mode (ISL9104A variant)-extends battery runtime in standby by minimizing light-load losses. |
| Duty Cycle | 100% maximum-achieves <300mV dropout at 500mA, allowing operation down to VIN = VOUT + 300mV for deep battery discharge. |
| Thermal Protection | 130°C shutdown with 30°C hysteresis-prevents thermal runaway during sustained high-current operation in sealed enclosures. |
| Enable Threshold | Logic-high >1.4V, logic-low <0.4V-compatible with standard 1.8V/3.3V GPIOs for precise power sequencing control. |
Pinout & Package
ISL9104AIRUNZ-T7A is housed in a Pb-free, RoHS-compliant 1.6mm × 1.6mm µTDFN-6 package with exposed thermal pad (PKG DWG # L6.1.6x1.6). The package supports high-density layout and efficient thermal dissipation in thin mobile form factors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.7–6.0V; requires local 4.7µF X5R ceramic decoupling to minimize high-frequency switching noise on battery rail. |
| EN (Pin 2) | Enable control input | Active-high logic interface; pulls internal discharge FET when low to rapidly collapse VOUT-essential for safe power-down sequencing. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating per datasheet-no tie-to-ground or pull-up allowed. |
| FB (Pin 4) | Feedback reference node | Internally tied to 3.3V output for fixed-version operation; not accessible for adjustment-eliminates external resistor divider errors. |
| GND (Pin 5) | Power ground return | Primary ground reference for MOSFET drivers and control circuitry; must connect directly to solid ground plane under IC. |
| SW (Pin 6) | Switching node | Connects to inductor high-side; carries high di/dt square wave-requires short, wide trace routing away from noise-sensitive FB and EN lines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip mode | Eliminates audible coil whine in PFM operation-critical for consumer audio-sensitive applications like MP3 players and handsets. |
| Integrated P/N-MOSFETs | 0.45Ω P-ch / 0.4Ω N-ch ON-resistance maximizes efficiency (>93% at 500mA) and removes need for external power switches. |
| Internal digital soft-start | 1ms controlled ramp prevents inrush current and output overshoot during power-up-protects downstream logic and reduces input capacitor stress. |
| Output capacitor discharge | Internal bleeding FET (100Ω) discharges VOUT within milliseconds of EN deactivation-enables safe reset and prevents back-powering of upstream circuits. |
| Overtemperature protection | 130°C thermal shutdown with 30°C hysteresis ensures reliable operation under sustained load in thermally constrained enclosures. |
Applications
| Mobile Phone Baseband Power | WCDMA Transceiver Bias |
|---|---|
Use Scenario: Powers ARM-based baseband processor in dual-mode GSM/WCDMA handset operating from single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Primary step-down regulator delivering clean, regulated 3.3V to processor I/O and memory interfaces. Use Value: Ultrasonic skip mode prevents audible noise during idle; 100% duty cycle maintains regulation down to 3.6V input as battery discharges. | Use Scenario: Supplies bias voltage to WCDMA PA driver and RF front-end ICs requiring stable 3.3V under dynamic transmit/receive load transitions. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter with fast transient response to support burst-mode RF transmission. Use Value: 4.3MHz switching enables small 1.0µH inductor; peak-current-mode control minimizes output voltage droop during 300mA load steps. |
| Portable Medical Sensor Hub | Bluetooth LE Audio Module |
Use Scenario: Powers multi-sensor acquisition hub (ECG, SpO₂, temperature) in wearable patch device with 30-day battery life target. IC Role / Device Role / Timing Role: System power manager converting Li-ion voltage to fixed 3.3V for mixed-signal SoC and analog front-ends. Use Value: 32µA quiescent current in skip mode extends standby time; internal soft-start prevents sensor initialization faults during cold start. | Use Scenario: Delivers 3.3V to Bluetooth 5.0 LE audio SoC in true wireless stereo earbuds with tight 3.5mm × 3.5mm PCB area budget. IC Role / Device Role / Timing Role: Compact, high-frequency buck converter enabling minimal passive component footprint. Use Value: 1.6×1.6mm µTDFN package and 4.7µF input/output caps reduce total solution size to <0.5cm²-fits inside earbud housing. |
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 | 3.0V fixed output, 4MHz switching, 22µA IQ in PFM, 0.5A rating-lacks ultrasonic PFM and 100% duty cycle. | Suitable for 3.0V logic rails but not direct replacement for 3.3V systems requiring dropout headroom. | Select when 3.0V output suffices and audible noise is non-critical; verify thermal performance with 160°C/W θJA. |
| MP2155GQZ-P | 3.3V fixed output, 4MHz, 25µA IQ, 0.6A rating-includes spread-spectrum but no output discharge FET or ultrasonic PFM. | Supports higher current loads but lacks rapid VOUT collapse needed for strict power sequencing. | Prefer for higher-output-current designs where discharge timing is managed externally; confirm EMI compliance with spread-spectrum enabled. |
Compared with TPS62231DRYR and MP2155GQZ-P, ISL9104AIRUNZ-T7A uniquely combines ultrasonic skip mode, 100% duty-cycle low-dropout, and integrated output discharge-making it optimal for noise-sensitive, space-constrained, and sequenced-power mobile applications demanding 3.3V regulation.
Availability
ISL9104AIRUNZ-T7A is available at Aetrix Electronics and suitable for mobile phone baseband power, WCDMA transceiver bias, portable medical sensor hubs, Bluetooth LE audio modules, and other compact battery-powered applications requiring stable component supply with long-term lifecycle assurance.
Supply support for ISL9104AIRUNZ-T7A 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, with heritage from Intersil's precision power conversion portfolio.
The ISL9104A family was designed specifically for ultra-compact, battery-optimized DC-DC conversion in handheld consumer electronics-emphasizing low IQ, ultrasonic operation, and minimal PCB footprint.
FAQ
What is the output voltage tolerance of the ISL9104AIRUNZ-T7A across temperature and line variations?
The ISL9104AIRUNZ-T7A provides a fixed 3.3V output with ±3% accuracy over 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 ensures stable power delivery to 3.3V I/O peripherals without requiring external trimming or calibration. The ISL9104AIRUNZ-T7A achieves this via factory-trimmed internal feedback and robust bandgap reference design.
Does the ISL9104AIRUNZ-T7A support ultrasonic operation in skip mode, and how does it differ from the ISL9104 version?
Yes, the ISL9104AIRUNZ-T7A explicitly includes ultrasonic skip mode (PFM), which suppresses audible coil whine by operating switching frequencies above 20kHz during light-load conditions. This feature distinguishes it from the base ISL9104 series (e.g., ISL9104IRUNZ-T), which lacks ultrasonic capability. The "A" suffix in ISL9104AIRUNZ-T7A denotes this enhanced acoustic performance-critical for consumer audio devices.
What is the maximum continuous output current the ISL9104AIRUNZ-T7A can deliver, and under what conditions is it guaranteed?
The ISL9104AIRUNZ-T7A guarantees a minimum continuous output current of 500mA across the full operating temperature range (-40°C to +85°C) and input voltage range (2.7V to 6.0V). This rating assumes proper PCB layout with thermal vias to the ground plane, 1.0µH inductor (e.g., KEMET LB3218-T1R0MK), and 4.7µF input/output ceramic capacitors. Derating applies above +85°C ambient.
How does the ISL9104AIRUNZ-T7A handle power-down sequencing, and what role does the EN pin play?
When the EN pin of the ISL9104AIRUNZ-T7A is driven low, the device disables both internal P- and N-channel MOSFETs and activates an internal bleeding FET (100Ω) to rapidly discharge the output capacitor. This ensures controlled, sub-millisecond VOUT collapse-enabling safe power-down sequencing in multi-rail systems. The EN pin accepts standard 1.8V/3.3V logic levels and must never be left floating.
What package type and thermal characteristics does the ISL9104AIRUNZ-T7A use, and how does it impact board design?
The ISL9104AIRUNZ-T7A uses a 1.6mm × 1.6mm µTDFN-6 package (PKG DWG # L6.1.6x1.6) with exposed thermal pad. Its typical junction-to-ambient thermal resistance (θJA) is 160°C/W when mounted on a standard FR-4 board with adequate copper pour. Designers must connect the thermal pad to a solid ground plane using ≥4 thermal vias (0.3mm diameter) to maintain safe junction temperatures below 125°C at full 500mA load.
ISL9104AIRUNZ-T7A 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):
- 3.3V
- 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)
ISL9104AIRUNZ-T7A FAQ
1.How can I place an order for ISL9104AIRUNZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104AIRUNZ-T7A 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 ISL9104AIRUNZ-T7A reliable?
The price and inventory of ISL9104AIRUNZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104AIRUNZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104AIRUNZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104AIRUNZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104AIRUNZ-T7A?
ISL9104AIRUNZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104AIRUNZ-T7A 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 ISL9104AIRUNZ-T7A?
For technical support, including ISL9104AIRUNZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104AIRUNZ-T7A requirements.
6.How does Aetrix verify that ISL9104AIRUNZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104AIRUNZ-T7A 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 ISL9104AIRUNZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104AIRUNZ-T7A?
All ISL9104AIRUNZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104AIRUNZ-T7A, 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 ISL9104AIRUNZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104AIRUNZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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