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Renesas ISL9104AIRUBZ-T7A
- Part No.:
- ISL9104AIRUBZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104AIRUBZ-T7A.pdf
- Description:
- IC REG BUCK 1.5V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,887
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Product details
Overview
ISL9104AIRUBZ-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 1.5V 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 and ultrasonic switching noise suppression.
For engineers reviewing the ISL9104AIRUBZ-T7A datasheet, ISL9104AIRUBZ-T7A pinout, ISL9104AIRUBZ-T7A application, or ISL9104AIRUBZ-T7A equivalent, key selection criteria include its 1.5V fixed output, ultrasonic skip-mode operation (ISL9104A variant), 1.6×1.6mm µTDFN package, and guaranteed 500mA output with thermal/overcurrent protection.
Technical Context
The ISL9104AIRUBZ-T7A employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its ultrasonic skip mode (PFM) activates after 16 consecutive zero-crossing cycles and regulates output by modulating pulse width while maintaining clock synchronization.
It integrates a 0.8V bandgap reference, transconductance error amplifier with internal RC compensation, and dedicated zero-cross sensing circuitry. The device supports logic-controlled enable/disable with internal output capacitor discharge path and 100% duty-cycle low-dropout operation when VIN approaches VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±3% over temperature and line - ensures stable core voltage for 1.5V logic domains without external feedback resistors. |
| Max Output Current | 500mA guaranteed - supports single-core microprocessors or 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. |
| Switching Frequency | 4.3MHz nominal (3.6–4.9MHz range) - enables use of 1.0µH inductor and 4.7µF ceramic capacitors for <0.5cm² total solution size. |
| Quiescent Current | 84µA typical in skip mode at 1.5V output - maximizes battery runtime in standby/sleep states of portable equipment. |
| Duty Cycle | 100% maximum - achieves <300mV dropout at 500mA, extending usable battery life down to ~1.8V input. |
| Shutdown Current | 0.05µA typical - minimizes leakage during system power-off, critical for long-term storage or ultra-low-power wake-on-event designs. |
Pinout & Package
ISL9104AIRUBZ-T7A is housed in a RoHS-compliant, Pb-free 6-pin 1.6mm × 1.6mm µTDFN package with exposed thermal pad (PKG DWG # L6.1.6x1.6). Pin 3 (NC) must be left floating; all other pins are electrically active and require proper PCB layout per datasheet recommendations.
| 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 switching noise on input rail. |
| EN (Pin 2) | Enable control | Active-high logic input; drives internal regulator and initiates soft-start; pulls output capacitor to GND when low for rapid discharge. |
| NC (Pin 3) | No connect | Internally unconnected; must remain unconnected and floating - no routing or grounding allowed. |
| FB (Pin 4) | Feedback node | Internally tied to 1.5V output for fixed-version operation; not accessible for adjustment - eliminates external resistor divider. |
| GND (Pin 5) | Ground reference | Primary return path for power and signal; must be connected to solid ground plane adjacent to VIN and SW traces to reduce EMI. |
| SW (Pin 6) | Switching node | Connects to inductor's high-side terminal; carries high di/dt square wave - requires short, wide trace and minimal loop area with GND. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip mode | Operates >20kHz in PFM to eliminate audible coil whine - essential for consumer audio-sensitive devices like MP3 players. |
| Integrated MOSFETs | P-Channel (0.45Ω typ @ 3.6V) + N-Channel (0.4Ω typ @ 3.6V) switches - reduce BOM count and improve efficiency vs. external FET solutions. |
| Digital soft-start | 1.0ms controlled ramp - prevents inrush current and output overshoot during power-up, protecting downstream 1.5V logic circuits. |
| Output capacitor discharge | Internal bleeding FET (100Ω ON-resistance) - discharges VOUT to <1% within 10ms of EN deactivation, meeting fast-power-down requirements. |
| Protection suite | Peak current limiting (1.0A typ), thermal shutdown (130°C), UVLO (2.5V threshold), and short-circuit protection - ensures robust operation under fault conditions. |
Applications
| Mobile Handset Power | Portable Instrument Core Supply |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver in WCDMA handsets operating from single Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.5V synchronous buck regulator delivering regulated core voltage with dynamic load handling up to 500mA. Use Value: Ultrasonic skip mode eliminates audible noise during call standby; 100% duty cycle extends talk time by 12–15% as battery discharges from 4.2V to 3.0V. | Use Scenario: Supplying FPGA configuration logic and sensor interface circuitry in handheld test equipment. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter providing clean, low-noise 1.5V rail independent of battery voltage sag. Use Value: 84µA skip-mode IQ preserves battery capacity during intermittent measurement cycles; thermal shutdown prevents malfunction during extended field use. |
| MP3 Player Audio Subsystem | PDA Application Processor Rail |
Use Scenario: Generating 1.5V supply for DAC, headphone amplifier, and flash memory controller in portable audio players. IC Role / Device Role / Timing Role: High-efficiency step-down regulator supporting burst-mode audio playback and deep-sleep states. Use Value: 0.05µA shutdown current enables >1-year shelf life; 4.3MHz switching allows compact 0603-size passive components, reducing PCB footprint by 35% vs. 1MHz alternatives. | Use Scenario: Powering ARM-based application processor in palmtop PDAs with dual-battery backup capability. IC Role / Device Role / Timing Role: Main core voltage regulator enabling dynamic voltage scaling between 1.5V active and 1.2V idle modes. Use Value: Internal digital soft-start ensures glitch-free boot sequence; integrated MOSFETs eliminate gate-drive timing mismatches common in discrete solutions. |
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, 2.05V–6.5V input, 25µA IQ in PFM - lacks ultrasonic skip mode and 100% duty cycle. | Suitable for lower-current applications where audible noise is not critical; requires larger inductor for same ripple performance. | Select when cost sensitivity outweighs ultrasonic operation and 500mA headroom is unnecessary. |
| RT8059NGQW | 2MHz frequency, 600mA output, 2.5V–5.5V input, 30µA IQ - no output capacitor discharge function; thermal shutdown at 150°C. | Better suited for industrial temperature range (-40°C to +105°C); lacks quick-bleed feature required for fast power-down sequencing. | Choose when higher ambient temperature tolerance is needed and output discharge is handled externally. |
Compared with TPS62231DRYR and RT8059NGQW, ISL9104AIRUBZ-T7A uniquely combines ultrasonic skip mode, 100% duty cycle, and integrated output discharge in a 1.6×1.6mm package - making it optimal for space-constrained, battery-life-critical consumer handhelds requiring silent operation and rapid state transitions.
Availability
ISL9104AIRUBZ-T7A is available at Aetrix Electronics and suitable for mobile handset power, portable instrument core supply, MP3 player audio subsystems, PDA application processor rails, and WCDMA baseband applications requiring stable component supply across production lifecycles.
Supply support for ISL9104AIRUBZ-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, formed through the acquisition of Intersil in 2017. The company specializes in power-efficient solutions for mobile, industrial, and automotive markets.
The ISL9104A product line was designed specifically for ultra-compact, battery-powered handheld electronics requiring high light-load efficiency, silent operation, and minimal PCB area - targeting next-generation cellular phones, PDAs, and portable instrumentation.
FAQ
What is the output voltage of the ISL9104AIRUBZ-T7A and is it adjustable?
The ISL9104AIRUBZ-T7A provides a fixed 1.5V output with ±3% accuracy over temperature and line conditions. It is not adjustable - the FB pin is internally connected to the output, eliminating the need for external resistor dividers. This simplifies design and improves stability for dedicated 1.5V rail applications such as baseband processors and FPGA I/O banks.
Does the ISL9104AIRUBZ-T7A support ultrasonic operation to prevent audible noise?
Yes, the ISL9104AIRUBZ-T7A (denoted by the "A" suffix) features ultrasonic skip mode operation that maintains switching frequencies above 20kHz during light-load conditions. This prevents audible coil whine in sensitive audio environments such as MP3 players and handsets - a key differentiator from the non-A ISL9104 variants.
What is the quiescent current of the ISL9104AIRUBZ-T7A in skip mode at 1.5V output?
The ISL9104AIRUBZ-T7A draws 84µA typical quiescent current in skip mode when configured for 1.5V fixed output and operating at VIN = 6.0V with no load. This value is higher than the 20–32µA seen in adjustable versions due to internal biasing of the fixed-feedback network, but remains exceptionally low for extended battery life in portable systems.
How does the ISL9104AIRUBZ-T7A handle output capacitor discharge during shutdown?
When the EN pin is pulled low, the ISL9104AIRUBZ-T7A activates an internal bleeding MOSFET (100Ω typical ON-resistance) between VOUT and GND. This discharges the output capacitor to <1% of nominal voltage within 10ms, ensuring fast, controlled power-down - critical for systems requiring precise power sequencing or data retention during state transitions.
What package type and thermal characteristics does the ISL9104AIRUBZ-T7A use?
The ISL9104AIRUBZ-T7A uses a 6-pin 1.6mm × 1.6mm µTDFN package (PKG DWG # L6.1.6x1.6) with exposed thermal pad. Its typical junction-to-ambient thermal resistance (θJA) is 160°C/W on a standard test board, and it incorporates thermal shutdown at 130°C with 30°C hysteresis to protect against sustained overload or poor heatsinking.
ISL9104AIRUBZ-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):
- 1.5V
- 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)
ISL9104AIRUBZ-T7A FAQ
1.How can I place an order for ISL9104AIRUBZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104AIRUBZ-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 ISL9104AIRUBZ-T7A reliable?
The price and inventory of ISL9104AIRUBZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104AIRUBZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104AIRUBZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104AIRUBZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104AIRUBZ-T7A?
ISL9104AIRUBZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104AIRUBZ-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 ISL9104AIRUBZ-T7A?
For technical support, including ISL9104AIRUBZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104AIRUBZ-T7A requirements.
6.How does Aetrix verify that ISL9104AIRUBZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104AIRUBZ-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 ISL9104AIRUBZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104AIRUBZ-T7A?
All ISL9104AIRUBZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104AIRUBZ-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 ISL9104AIRUBZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104AIRUBZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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