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Renesas ISL9104AIRUFZ-T7A
- Part No.:
- ISL9104AIRUFZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104AIRUFZ-T7A.pdf
- Description:
- IC REG BUCK 2.5V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,292
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Product details
Overview
ISL9104AIRUFZ-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 2.5V output from 2.7–6.0V input, features 20µA quiescent current in skip mode, 100% duty-cycle operation for <300mV dropout at 500mA, and integrated P/N-channel MOSFETs. It is used in WCDMA handsets and portable instruments requiring high light-load efficiency.
For engineers reviewing the ISL9104AIRUFZ-T7A datasheet, ISL9104AIRUFZ-T7A pinout, ISL9104AIRUFZ-T7A application, or ISL9104AIRUFZ-T7A equivalent, key selection criteria include ultrasonic skip-mode operation (eliminating audible noise), guaranteed 500mA output with ±3% regulation accuracy, thermal shutdown at 130°C, and compatibility with single Li+ cell or regulated 5V supplies.
Technical Context
The ISL9104AIRUFZ-T7A employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its 4.3MHz fixed-frequency PWM operation under heavy load enables use of 1.0µH inductors and 4.7µF ceramic capacitors, minimizing PCB area.
In light-load conditions, it automatically enters ultrasonic skip mode (PFM), where zero-cross detection over 16 consecutive cycles triggers pulse-skipping-reducing switching loss while maintaining >20kHz operation to avoid audible noise. The device integrates digital soft-start, logic-controlled enable, and an internal bleeding FET that discharges the output capacitor during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over temperature and line-ensures stable core voltage for low-power microprocessors without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum-supports sustained operation of baseband processors and RF subsystems in handheld devices. |
| Input Voltage Range | 2.7V to 6.0V-enables direct operation from single Li+ cells (2.7–4.2V), three NiMH cells, or regulated 5V rails. |
| Quiescent Current | 20µA typical in skip mode-maximizes battery runtime in standby or low-activity states of portable electronics. |
| Switching Frequency | 4.3MHz nominal (3.6–4.9MHz over temp)-permits ultra-compact 1.6×1.6mm layout with sub-1mm height inductors and 0603 capacitors. |
| Duty Cycle | 100% maximum-enables dropout voltage <300mV at 500mA, extending usable battery range down to ~2.8V input for 2.5V output. |
| Shutdown Current | <1µA logic-controlled-minimizes system leakage when powered off, critical for always-on sensor nodes or backup domains. |
Pinout & Package
The ISL9104AIRUFZ-T7A 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 for EMI suppression and transient current sourcing. |
| EN (Pin 2) | Enable control | Active-high logic input; pulls internal reference and initiates soft-start when high; forces full shutdown and output discharge when low. |
| NC (Pin 3) | No-connect | Internally unconnected; must be left floating-no external tie or pull required. |
| FB (Pin 4) | Feedback node | Internally tied to 2.5V reference for fixed-output version; not user-accessible-no external resistor divider needed. |
| GND (Pin 5) | Power ground | Primary return path for input/output currents and IC bias; must be connected to solid ground plane beneath thermal pad. |
| SW (Pin 6) | Switching node | Drives external inductor; carries high di/dt square wave-requires short, wide trace routing away from sensitive analog paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip mode | Eliminates audible coil whine by maintaining >20kHz switching during light-load PFM operation-critical for consumer audio-sensitive applications. |
| Integrated MOSFETs | P-Channel (0.45Ω typ) and N-Channel (0.4Ω typ) switches reduce BOM count and improve efficiency vs. external-FET solutions. |
| Output capacitor bleed function | Internal discharge FET actively drains output capacitance on disable-prevents residual voltage from interfering with downstream power sequencing or safety checks. |
| Digital soft-start | 1ms controlled ramp limits inrush current during startup-protects input source and avoids brownout in multi-rail systems. |
| Thermal protection | 130°C shutdown with 30°C hysteresis ensures reliable operation under sustained high ambient or overload conditions without external monitoring. |
Applications
| Mobile Handset Power | WCDMA Baseband Supply |
|---|---|
Use Scenario: Powering application processor cores and memory interfaces in slim WCDMA handsets operating from single Li+ cells. IC Role / Device Role / Timing Role: Primary step-down regulator delivering tightly regulated 2.5V at up to 500mA with dynamic load response to CPU burst activity. Use Value: Ultrasonic skip mode prevents audible noise during idle periods; 100% duty cycle extends usable battery life down to 2.8V input. | Use Scenario: Supplying low-noise, high-efficiency power to WCDMA transceiver baseband ICs requiring stable 2.5V under varying RF transmit/receive loads. IC Role / Device Role / Timing Role: Synchronous buck converter providing clean, ripple-controlled 2.5V rail with fast transient recovery (<10µs) to maintain signal integrity. Use Value: 4.3MHz switching minimizes output voltage ripple and EMI coupling into sensitive RF sections; integrated MOSFETs reduce layout sensitivity. |
| Portable Medical Instrument | Ultra-Compact PDAs |
Use Scenario: Powering microcontroller and sensor interface circuitry in battery-operated handheld medical devices requiring long shelf life and silent operation. IC Role / Device Role / Timing Role: Main system regulator enabling >100-hour battery runtime via 20µA skip-mode IQ and <1µA shutdown current. Use Value: No audible noise during patient monitoring; thermal shutdown protects against enclosure overheating in sealed enclosures. | Use Scenario: Generating 2.5V core voltage for ARM-based PDAs with tight board area constraints and aggressive power sequencing requirements. IC Role / Device Role / Timing Role: Compact DC/DC solution with integrated enable and soft-start supporting controlled power-up of multiple voltage domains. Use Value: 1.6×1.6mm µTDFN footprint occupies <0.5cm² total; EN pin allows precise coordination with PMIC or host processor reset signals. |
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 frequency, 300mA output, 1.8–6.5V input, no ultrasonic skip mode | Lacks ultrasonic PFM-may generate audible noise in quiet environments; lower current rating limits use in higher-power baseband ICs | Select when cost sensitivity outweighs noise requirements and load current stays below 300mA. |
| RT8059GJ6 | 2.5MHz switching, 600mA output, 2.5–5.5V input, 25µA skip-mode IQ, no integrated bleed FET | Higher max current but lacks active output discharge-requires external circuitry for safe power-down sequencing in multi-rail systems | Choose when higher output current is mandatory and external bleed control is acceptable. |
Compared with TPS62231DRYR and RT8059GJ6, the ISL9104AIRUFZ-T7A uniquely combines ultrasonic skip mode, integrated output bleed, and 500mA capability in a 1.6×1.6mm package-making it optimal for noise-critical, space-constrained, and sequenced-power applications.
Availability
ISL9104AIRUFZ-T7A is available at Aetrix Electronics and suitable for mobile handset power, WCDMA baseband supply, portable medical instrument, and ultra-compact PDA applications requiring stable component supply across production lifecycles.
Supply support for ISL9104AIRUFZ-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 microcontrollers, analog, power, and SoC products, formed through the integration of NEC Electronics and Renesas Technology.
The ISL9104AIRUFZ-T7A belongs to Renesas' high-efficiency, ultra-small-footprint DC/DC converter family designed specifically for battery-powered portable electronics demanding low IQ, ultrasonic operation, and minimal PCB area.
FAQ
What is the output voltage of the ISL9104AIRUFZ-T7A?
The ISL9104AIRUFZ-T7A provides a fixed 2.5V output with ±3% accuracy over temperature and line variations. This eliminates the need for external feedback resistors and simplifies design for applications requiring a stable, pre-set core voltage-such as powering baseband processors in WCDMA handsets. The ISL9104AIRUFZ-T7A achieves this using an internal reference and dedicated FB pin connection optimized for fixed-output operation.
Does the ISL9104AIRUFZ-T7A support ultrasonic operation to prevent audible noise?
Yes, the ISL9104AIRUFZ-T7A supports ultrasonic skip mode (PFM), a feature exclusive to the ISL9104A variant. During light-load conditions, it maintains switching frequencies above 20kHz to eliminate audible coil whine-a critical requirement for consumer audio-sensitive devices like mobile handsets and portable medical instruments. The ISL9104AIRUFZ-T7A implements this via zero-cross detection over 16 consecutive cycles before entering skip mode.
How does the ISL9104AIRUFZ-T7A handle output capacitor discharge during shutdown?
The ISL9104AIRUFZ-T7A integrates a dedicated bleeding MOSFET that actively discharges the output capacitor when the EN pin is driven low. This ensures rapid and controlled removal of residual voltage from the 2.5V rail, preventing interference with downstream power sequencing, safety interlocks, or reset timing in multi-rail systems. Unlike external discharge solutions, this function requires no additional components and operates automatically upon disable.
What is the recommended inductor value for the ISL9104AIRUFZ-T7A?
The recommended inductor value for the ISL9104AIRUFZ-T7A is 1.0µH, as specified in the datasheet for optimal steady-state and transient performance. A KEMET LB3218-T1R0MK (1.0µH, 1.0A saturation current, 60mΩ DCR) is explicitly listed as compatible. This value balances ripple current, efficiency, and physical size-enabling use of compact 3.2×1.8mm shielded inductors while maintaining stability across the full 500mA load range.
What package type and dimensions does the ISL9104AIRUFZ-T7A use?
The ISL9104AIRUFZ-T7A uses a Pb-free, RoHS-compliant 6-pin µTDFN package measuring 1.6mm × 1.6mm × 0.55mm with an exposed thermal pad. This ultra-compact footprint occupies less than 0.5cm² of PCB area and supports fine-pitch reflow assembly. The thermal pad must be soldered to a solid ground plane to achieve the specified θJA of 160°C/W and ensure reliable operation at full 500mA load.
ISL9104AIRUFZ-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):
- 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-T7A FAQ
1.How can I place an order for ISL9104AIRUFZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104AIRUFZ-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 ISL9104AIRUFZ-T7A reliable?
The price and inventory of ISL9104AIRUFZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104AIRUFZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104AIRUFZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104AIRUFZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104AIRUFZ-T7A?
ISL9104AIRUFZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104AIRUFZ-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 ISL9104AIRUFZ-T7A?
For technical support, including ISL9104AIRUFZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104AIRUFZ-T7A requirements.
6.How does Aetrix verify that ISL9104AIRUFZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104AIRUFZ-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 ISL9104AIRUFZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104AIRUFZ-T7A?
All ISL9104AIRUFZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104AIRUFZ-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 ISL9104AIRUFZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104AIRUFZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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