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Renesas ISL9104AIRUAZ-T
- Part No.:
- ISL9104AIRUAZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104AIRUAZ-T.pdf
- Description:
- IC REG BUCK ADJ 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,899
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Product details
Overview
ISL9104AIRUAZ-T from Renesas Electronics (formerly Intersil) is a 500mA, 4.3MHz synchronous buck converter optimized for low-voltage microprocessor power in space-constrained portable 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 - enabling extended battery life in handheld electronics.
For engineers reviewing the ISL9104AIRUAZ-T datasheet, ISL9104AIRUAZ-T pinout, ISL9104AIRUAZ-T application, or ISL9104AIRUAZ-T equivalent, key selection criteria include its ultrasonic skip-mode operation (eliminating audible noise), 100% duty-cycle low-dropout capability, integrated P/N-MOSFETs with 0.45Ω/0.4Ω typical RDS(on), and 1.6×1.6mm µTDFN-6 package footprint.
Technical Context
The ISL9104AIRUAZ-T employs peak-current-mode PWM control with slope compensation for fast transient response and cycle-by-cycle current limiting. Its internal architecture integrates a 0.8V bandgap reference, transconductance error amplifier, and zero-crossing detection circuit enabling automatic transition between fixed-frequency PWM (heavy load) and ultrasonic pulse-skipping (PFM) mode (light load).
It implements logic-controlled enable with active-low shutdown (<1µA), internal digital soft-start (1ms), and protection functions including overcurrent (1.0A typical peak limit), thermal shutdown (130°C), and output capacitor discharge via internal bleeding FET. The FB pin accepts external resistive feedback for precise output voltage setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 500mA continuous - supports core logic rails in mobile SoCs without external current boosting. |
| Switching Frequency | 4.3MHz nominal (3.6–4.9MHz range) - enables use of 1.0µH inductors and compact 4.7µF ceramic capacitors. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li-ion, three NiMH, or regulated 5V supplies. |
| Quiescent Current | 20µA typical in skip mode - maximizes standby time in always-on subsystems like RTC or sensor hubs. |
| Feedback Reference | 0.8V ±2% over temperature - sets output voltage accuracy for adjustable configurations using external R1/R2 divider. |
| Duty Cycle | 100% maximum - achieves <300mV dropout at 500mA, extending usable battery range near end-of-discharge. |
| Shutdown Current | <1µA - ensures negligible battery drain during system sleep or power-off states. |
| Package | 1.6mm × 1.6mm µTDFN-6 - occupies <0.5cm² PCB area, suitable for ultra-thin mobile PCB stackups. |
Pinout & Package
ISL9104AIRUAZ-T is housed in a 6-pin, 1.6mm × 1.6mm µTDFN package with exposed thermal pad (PKG DWG # L6.1.6x1.6). Pin 3 is NC (no connect); all other pins are electrically functional and require proper routing per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.7–6.0V; requires local 4.7µF ceramic decoupling to GND for EMI suppression and transient stability. |
| EN (Pin 2) | Enable control input | Active-high logic interface; pulls low to disable regulator and actively discharge output capacitor via internal FET. |
| NC (Pin 3) | No-connect terminal | Must be left floating - not internally bonded; no PCB trace or solder mask required. |
| FB (Pin 4) | Feedback node for output regulation | Connects to resistor divider (R1/R2) for adjustable VOUT; 0.8V reference enables precise setting from 0.8V to >VIN−VDO. |
| GND (Pin 5) | Power ground reference | Primary return path for input/output currents; must tie directly to solid ground plane under IC for thermal and noise performance. |
| SW (Pin 6) | Switching node | Drives external inductor; high dv/dt node requiring short, wide trace routing away from sensitive analog signals. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip mode | Eliminates audible coil whine in PFM operation - critical for consumer audio-sensitive applications like MP3 players. |
| Integrated P/N-MOSFETs | 0.45Ω P-ch / 0.4Ω N-ch RDS(on) - reduces external component count and improves full-load efficiency up to 93%. |
| Internal digital soft-start | 1ms controlled ramp - prevents inrush current and output overshoot during power-up sequencing. |
| Output capacitor discharge | Active bleed path via internal FET - ensures safe, rapid VOUT collapse when EN is deasserted. |
| Overtemperature protection | 130°C shutdown with 30°C hysteresis - prevents thermal runaway during sustained overload or poor heatsinking. |
| Pb-free RoHS compliance | µTDFN package with NiPdAu e4 termination - compatible with SnPb and Pb-free reflow profiles per J-STD-020. |
Applications
| Mobile Phone Core Power | WCDMA Handset RF Bias |
|---|---|
|
Use Scenario: Supplying 1.2V/1.5V core voltage to application processors in slim smartphones with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary step-down DC-DC regulator delivering stable, low-noise power with dynamic load response to CPU DVFS transitions. Use Value: 4.3MHz switching and 20µA skip-mode IQ extend talk-time by >15% versus lower-frequency alternatives under light-load standby. |
Use Scenario: Generating clean 2.5V/2.8V bias for WCDMA power amplifiers and front-end modules in cellular handsets. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with fast transient recovery to maintain PA linearity during burst transmission. Use Value: Integrated MOSFETs and 100% duty cycle support >90% efficiency at 300mA while maintaining <10mV load regulation. |
| Portable Instrument Sensor Rail | MP3 Player Audio Codec Supply |
|
Use Scenario: Providing 1.8V/2.5V precision rail for low-power ADCs, MEMS sensors, and wireless transceivers in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise, low-IQ power source with tight output accuracy (±2% FB reference) for measurement-grade analog circuits. Use Value: Ultrasonic skip mode prevents interference with sensitive analog signal chains - no audible artifacts or spectral contamination. |
Use Scenario: Powering stereo audio DACs and headphone amplifiers in battery-operated MP3 players. IC Role / Device Role / Timing Role: Efficient, quiet voltage regulator supplying clean 3.3V or adjustable 1.2V–3.3V rails to audio subsystems. Use Value: <1µA shutdown current preserves battery charge during long idle periods; 1.6×1.6mm footprint saves board space for compact form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | 3MHz switching, 400mA rated, 17µA IQ in PFM, 2.05V–6.5V input | Lacks ultrasonic skip mode; lower max current limits use in higher-power SoC cores | Preferred where cost sensitivity outweighs ultrasonic noise requirement and 500mA headroom is unnecessary. |
| MAX17222ETA+T | 1.2MHz, 500mA, 1.4µA IQ in shutdown, 2.0V–5.5V input, integrated compensation | Slower switching increases inductor size; no active output discharge; no 100% duty cycle | Selected when minimal BOM count and ultra-low shutdown IQ are prioritized over transient speed and dropout performance. |
Compared with TPS62231DRYT and MAX17222ETA+T, the ISL9104AIRUAZ-T uniquely combines ultrasonic PFM operation, 100% duty cycle, and 4.3MHz switching in a 1.6×1.6mm package - making it optimal for noise-sensitive, space-constrained, battery-critical designs requiring full 500mA capability.
Availability
ISL9104AIRUAZ-T is available at Aetrix Electronics and suitable for mobile phone core power, WCDMA handset RF bias, portable instrument sensor rails, and MP3 player audio codec supply requiring stable component supply across production lifecycles.
Supply support for ISL9104AIRUAZ-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 (acquired Intersil in 2017) designs high-performance analog and power management semiconductors for mobile, industrial, and automotive markets.
The ISL9104AIRUAZ-T belongs to Renesas' low-IQ, high-frequency synchronous buck converter product line - engineered specifically for battery-powered portable electronics demanding minimal footprint, ultralow quiescent current, and silent operation.
FAQ
What output voltage does ISL9104AIRUAZ-T support?
The ISL9104AIRUAZ-T is an adjustable-output buck converter with no internal feedback divider. It uses an external resistor network on the FB pin to set output voltage from 0.8V up to just below VIN, based on the 0.8V reference. The "ADJ" marking in the ordering table confirms this configuration. ISL9104AIRUAZ-T requires R1 and R2 resistors per Equation 2 in the datasheet to define VOUT.
Does ISL9104AIRUAZ-T include ultrasonic skip mode?
Yes, ISL9104AIRUAZ-T includes ultrasonic skip mode - explicitly indicated by "YES" in the "ULTRASONIC FUNCTION" column for part ISL9104AIRUAZ-T in the Ordering Information table. This feature suppresses audible noise during light-load PFM operation, distinguishing it from the non-ultrasonic ISL9104IRUAZ-T variant.
What is the thermal resistance θJA of ISL9104AIRUAZ-T?
The ISL9104AIRUAZ-T has a typical junction-to-ambient thermal resistance (θJA) of 160°C/W when mounted on a high thermal conductivity test board in free air, as specified in the Thermal Information section (Page 4). This value assumes optimal PCB layout with thermal pad soldering and ground plane exposure.
How does ISL9104AIRUAZ-T handle output capacitor discharge?
ISL9104AIRUAZ-T provides active output capacitor discharge via an internal bleeding MOSFET. When the EN pin is driven low, the device disables both main switches and turns on this dedicated discharge path, rapidly collapsing VOUT to near-zero volts - ensuring safe power sequencing and preventing backfeed in multi-rail systems.
What protection features are integrated into ISL9104AIRUAZ-T?
ISL9104AIRUAZ-T integrates overcurrent protection (OCP) with 1.0A typical peak current limit, thermal shutdown at 130°C (30°C hysteresis), undervoltage lockout (UVLO) at 2.5V, and short-circuit protection (SCP) that reduces oscillator frequency under output fault conditions - all confirmed in the Datasheet Sections 3, 4, and Theory of Operation.
ISL9104AIRUAZ-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:
- 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-T FAQ
1.How can I place an order for ISL9104AIRUAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104AIRUAZ-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 ISL9104AIRUAZ-T reliable?
The price and inventory of ISL9104AIRUAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104AIRUAZ-T is usually 5 days.
3.What payment methods are accepted for ISL9104AIRUAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104AIRUAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104AIRUAZ-T?
ISL9104AIRUAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104AIRUAZ-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 ISL9104AIRUAZ-T?
For technical support, including ISL9104AIRUAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104AIRUAZ-T requirements.
6.How does Aetrix verify that ISL9104AIRUAZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9104AIRUAZ-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 ISL9104AIRUAZ-T meets industry standards.
7.What is the process for return or replacement of ISL9104AIRUAZ-T?
All ISL9104AIRUAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104AIRUAZ-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 ISL9104AIRUAZ-T part is unused and in its original packaging.
Return procedure for ISL9104AIRUAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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