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Renesas ISL9104AIRUAZ-T7A
- Part No.:
- ISL9104AIRUAZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104AIRUAZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:261
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Product details
Overview
ISL9104AIRUAZ-T7A from Renesas (formerly Intersil) is a 500mA, 4.3MHz synchronous buck converter optimized for low-voltage microprocessor power in compact battery-powered devices. It operates from 2.7V to 6.0V input, delivers adjustable output down to 0.8V via external resistor divider, and features 20µA quiescent current in skip mode, 100% duty-cycle operation, and integrated P/N-channel MOSFETs. It powers core logic in WCDMA handsets and portable instruments.
For engineers reviewing the ISL9104AIRUAZ-T7A datasheet, ISL9104AIRUAZ-T7A pinout, ISL9104AIRUAZ-T7A application, or ISL9104AIRUAZ-T7A equivalent, key selection criteria include ultrasonic skip-mode operation (eliminating audible noise), 1.6×1.6mm µTDFN package footprint, FB voltage accuracy of ±2% over temperature, thermal shutdown at 130°C, and compatibility with 1µH inductors and 4.7µF ceramic capacitors.
Technical Context
The ISL9104AIRUAZ-T7A uses peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its feedback loop references a precision 0.8V bandgap, and soft-start is implemented via a controlled ramp to both voltage and current loops to limit inrush current.
Under light load, it enters ultrasonic skip mode (PFM) - triggered after 16 consecutive zero-crossing detections - where switching frequency drops dynamically while maintaining >20kHz to avoid audible noise. At heavy load, it reverts to fixed 4.3MHz PWM operation with typical efficiency up to 93% at 1.5V/200mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 500mA continuous - supports processor core rails in mobile SoCs without external current boosting. |
| Switching Frequency | 4.3MHz nominal (3.6–4.9MHz range) - enables use of 1.0µH inductor and <0.5cm² total solution size. |
| Quiescent Current | 20µA typical in skip mode - extends Li-ion battery runtime in standby and low-activity states. |
| Feedback Voltage | 0.8V ±2% over –40°C to +85°C - sets precise output via external resistor divider (e.g., 1.5V = R1=84.5kΩ, R2=97.6kΩ). |
| Duty Cycle | 100% maximum - achieves <300mV dropout at 500mA, sustaining regulation as input drops near VOUT. |
| Shutdown Current | 0.05µA typical - minimizes system-level leakage when disabled via EN pin. |
| Thermal Shutdown | 130°C threshold with 30°C hysteresis - autonomously recovers at 100°C, protecting against sustained overload or poor PCB heatsinking. |
Pinout & Package
The ISL9104AIRUAZ-T7A is housed in a Pb-free, RoHS-compliant 6-pin 1.6mm × 1.6mm µTDFN package with exposed thermal pad (PKG DWG # L6.1.6x1.6). Pin 1 is marked by a dot; pin numbering follows standard top-view counterclockwise layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply rail | Accepts 2.7–6.0V; requires local 4.7µF X5R ceramic decoupling to GND for EMI suppression and transient response. |
| EN (Pin 2) | Logic-enable control | Active-high (≥1.4V); pulls FB low via internal bleeding FET when disabled, discharging output capacitor rapidly. |
| NC (Pin 3) | No-connect | Internally unconnected; must be left floating - no external tie or pull-up/down. |
| FB (Pin 4) | Feedback sensing node | Connects to resistor divider output (adjustable version); 0.8V reference sets VOUT = 0.8V × (1 + R1/R2). |
| GND (Pin 5) | Power ground | Primary return path for SW, VIN, and internal circuits; must connect directly to solid ground plane under IC. |
| SW (Pin 6) | Switching node | Drives external inductor; high di/dt node - keep trace short, wide, and isolated from sensitive analog routing. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip mode | Operates >20kHz during light-load PFM - eliminates audible coil whine in handheld audio-sensitive applications. |
| Integrated MOSFETs | P-Channel (0.45Ω typ @ 3.6V) + N-Channel (0.4Ω typ @ 3.6V) - eliminates external switches and reduces BOM count by 4 components. |
| Quick output discharge | Internal bleeding FET activates on EN low - discharges output capacitor within milliseconds, meeting fast-power-down sequencing requirements. |
| Digital soft-start | Controlled ramp limits inrush current and output voltage slew rate - prevents overshoot and stabilizes startup into large capacitive loads. |
| Overcurrent & short-circuit protection | Peak current limiting (0.75–1.35A) + SCP comparator monitoring FB - shuts down oscillator on hard short, preventing thermal runaway. |
Applications
| Mobile Handset Core Power | Portable Instrument MCU Supply |
|---|---|
Use Scenario: Powering ARM Cortex-A/M series application processors in WCDMA/LTE smartphones during active and sleep modes. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1.0–1.5V core voltage with dynamic load response to CPU DVFS transitions. Use Value: 93% peak efficiency and 20µA skip-mode IQ extend talk time; ultrasonic PFM avoids interference with audio codecs and receivers. | Use Scenario: Supplying 3.3V I/O and 1.8V core rails for 32-bit MCUs in handheld test meters and data loggers. IC Role / Device Role / Timing Role: Single-chip DC/DC converter replacing linear regulators to reduce heat and improve battery life in sealed enclosures. Use Value: 100% duty cycle sustains regulation down to 3.6V input from depleting Li-ion cells; 1.6×1.6mm footprint saves space on dense instrument PCBs. |
| PDAs and Palmtop Systems | MP3 Player Baseband Power |
Use Scenario: Generating multiple low-noise rails (e.g., 1.2V, 1.8V, 2.5V) from single-cell Li-ion in legacy PDAs with tight thermal constraints. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured via precision resistor dividers for flexible rail generation. Use Value: ±2% FB accuracy ensures stable memory interface voltages; thermal shutdown protects against enclosure overheating during extended use. | Use Scenario: Providing clean, efficient 1.2V supply to DSP and audio codec in portable MP3 players with aggressive battery life targets. IC Role / Device Role / Timing Role: High-frequency synchronous buck regulator minimizing inductor size and EMI in audio-sensitive signal chains. Use Value: 4.3MHz switching allows 1.0µH inductor (3.2×1.8mm) - reduces solution height and magnetic coupling into adjacent analog stages. |
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 rated, 17µA IQ in PFM, 0.6V FB reference | Limited output current and lower max frequency - suitable only for sub-300mA MCU cores | Select when lower cost and smaller inductor (1.5µH) are prioritized over 500mA headroom. |
| RT8059GJ6 | 2.5MHz, 600mA, 22µA IQ, 0.6V FB, no ultrasonic PFM | Lacks ultrasonic skip mode - may generate audible noise under light load in audio products | Choose for higher current margin and simpler layout, accepting potential acoustic noise in non-audio contexts. |
Compared with TPS62231DRYR and RT8059GJ6, the ISL9104AIRUAZ-T7A uniquely combines 500mA capability, 4.3MHz operation, ultrasonic PFM, and 0.8V FB in a 1.6×1.6mm package - making it optimal for space-constrained, battery-sensitive, audio-immune mobile designs.
Availability
ISL9104AIRUAZ-T7A is available at Aetrix Electronics and suitable for mobile handset core power, portable instrument MCU supply, PDAs and palmtop systems, MP3 player baseband power, and WCDMA handset applications requiring stable component supply across production lifecycles.
Supply support for ISL9104AIRUAZ-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 (acquired Intersil in 2017) designs high-performance analog and power management ICs for mobile, industrial, and automotive markets, with ISO9001-certified manufacturing and global distribution.
The ISL9104AIRUAZ-T7A belongs to Renesas' ultra-compact, high-frequency buck converter product line, engineered specifically for Li-ion-powered portable electronics demanding minimal PCB area, low IQ, and noise-free operation.
FAQ
What output voltage does ISL9104AIRUAZ-T7A support?
The ISL9104AIRUAZ-T7A is an adjustable-output buck converter with no factory-set voltage. It uses an external resistor divider on the FB pin to set output from 0.8V to ≤VIN−dropout. Typical configurations include 1.2V (R1=80.6kΩ, R2=162kΩ), 1.5V (R1=84.5kΩ, R2=97.6kΩ), and 1.8V (R1=100kΩ, R2=80.6kΩ), all referenced to its 0.8V internal bandgap.
Does ISL9104AIRUAZ-T7A support ultrasonic operation in skip mode?
Yes, ISL9104AIRUAZ-T7A supports ultrasonic skip mode - a key differentiator from the ISL9104 (non-A) variant. Its PFM operation remains above 20kHz across all load and input conditions, eliminating audible coil whine in smartphones, MP3 players, and other audio-sensitive portable devices.
How does ISL9104AIRUAZ-T7A handle output capacitor discharge?
When the EN pin is pulled low, ISL9104AIRUAZ-T7A activates an internal bleeding MOSFET between FB and GND. This provides a controlled discharge path for the output capacitor, reducing VOUT to near-zero within milliseconds - satisfying fast-power-down sequencing requirements in multi-rail systems.
What is the thermal performance of ISL9104AIRUAZ-T7A in its 1.6×1.6mm package?
The ISL9104AIRUAZ-T7A has a typical θJA of 160°C/W in the 1.6×1.6mm µTDFN package. With 500mA load and 3.6V input, junction temperature rise is ~40°C above ambient under typical PCB layout - well below its 125°C max junction rating. Thermal shutdown triggers at 130°C with 30°C hysteresis for robust overload protection.
Can ISL9104AIRUAZ-T7A operate with a 1µH inductor and 4.7µF capacitors?
Yes, ISL9104AIRUAZ-T7A is fully characterized for use with a 1.0µH shielded inductor (e.g., KEMET LB3218-T1R0MK) and 4.7µF X5R/X7R ceramic capacitors on both input and output. This combination achieves >90% efficiency at 200mA and meets transient response specs per Figure 6–7 in the FN6829 datasheet.
ISL9104AIRUAZ-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- 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)
ISL9104AIRUAZ-T7A FAQ
1.How can I place an order for ISL9104AIRUAZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104AIRUAZ-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 ISL9104AIRUAZ-T7A reliable?
The price and inventory of ISL9104AIRUAZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104AIRUAZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104AIRUAZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104AIRUAZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104AIRUAZ-T7A?
ISL9104AIRUAZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104AIRUAZ-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 ISL9104AIRUAZ-T7A?
For technical support, including ISL9104AIRUAZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104AIRUAZ-T7A requirements.
6.How does Aetrix verify that ISL9104AIRUAZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104AIRUAZ-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 ISL9104AIRUAZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104AIRUAZ-T7A?
All ISL9104AIRUAZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104AIRUAZ-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 ISL9104AIRUAZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104AIRUAZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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