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Renesas ISL9103AIRUBZ-T
- Part No.:
- ISL9103AIRUBZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9103AIRUBZ-T.pdf
- Description:
- IC REG BUCK 1.5V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,888
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Product details
Overview
ISL9103AIRUBZ-T from Renesas (formerly Intersil) is a 500mA, 2.4MHz synchronous buck converter optimized for single Li+-cell-powered portable devices. It delivers a fixed 1.5V output with ±3% accuracy over temperature and line, operates from 2.7V–6.0V input, and achieves up to 95% efficiency at full load-enabling compact power delivery in mobile phones and WCDMA handsets.
For engineers reviewing the ISL9103AIRUBZ-T datasheet, ISL9103AIRUBZ-T pinout, ISL9103AIRUBZ-T application, or ISL9103AIRUBZ-T equivalent, key selection criteria include its 20µA skip-mode quiescent current, 100% duty-cycle low-dropout capability, ultrasonic PFM operation (ISL9103A variant), integrated P/N-MOSFETs, and 1.6×1.6mm UTDFN package footprint.
Technical Context
The ISL9103AIRUBZ-T employs peak-current-mode PWM control with internal slope compensation for fast transient response and cycle-by-cycle current limiting. Its feedback loop uses a precision 0.8V bandgap reference and is internally compensated for stability with standard external components.
Under light load, it autonomously enters ultrasonic skip mode (PFM) after detecting 16 consecutive zero-crossing cycles at the SW node-reducing switching frequency while maintaining >1.5% output voltage regulation window and eliminating audible noise. At heavy load, it reverts to fixed 2.4MHz PWM operation with typical 65ns minimum on-time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±3% over -40°C to +85°C - ensures stable core logic supply without external resistor divider. |
| Max Output Current | 500mA guaranteed - supports microprocessor I/O rails and baseband ICs in handheld devices. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li+ cell (2.7–4.2V), three NiMH cells, or regulated 5V rail. |
| Quiescent Current | 20µA typical in skip mode - extends battery runtime in standby and low-activity states. |
| Switching Frequency | 2.4MHz nominal (1.9–2.75MHz range) - enables use of 2.2µH inductor and 10µF ceramic caps for <0.5cm² solution size. |
| Duty Cycle | 100% maximum - supports <300mV dropout at 500mA, extending usable battery life down to ~1.8V input. |
| Shutdown Current | <1µA logic-controlled - minimizes system leakage during deep sleep or power-off states. |
Pinout & Package
ISL9103AIRUBZ-T is housed in a RoHS-compliant 6-pin 1.6mm×1.6mm Ultra-Thin Dual Flat No-Lead (UTDFN) package with exposed thermal pad (PKG DWG L6.1.6x1.6). The package supports high-density PCB layouts and efficient thermal dissipation via bottom-side copper connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input power supply | Accepts 2.7–6.0V; requires local 10µF ceramic decoupling to GND for EMI suppression and transient response. |
| EN (Pin 2) | Enable control input | Active-high logic interface; pulls internal discharge FET to bleed output capacitor when driven low. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating per datasheet-no external tie required. |
| FB (Pin 4) | Feedback reference node | Internally tied to 1.5V output for fixed-version operation; not user-accessible for voltage setting. |
| GND (Pin 5) | Power ground return | Primary return path for input/output currents and IC substrate; connects to thermal pad for heat sinking. |
| SW (Pin 6) | Switching node | Drives external inductor; carries high di/dt pulses-requires short, wide trace routing away from sensitive analog nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-MOSFETs | P-channel RDS(on) = 0.45Ω / N-channel RDS(on) = 0.4Ω @ 3.6V - eliminates external power switches and reduces BOM count by two active devices. |
| Ultrasonic Skip Mode | Operates >20kHz in PFM - prevents audible coil whine in consumer audio-sensitive applications like MP3 players. |
| Internal Digital Soft-Start | 1.2ms controlled ramp - limits inrush current during power-up, avoiding input rail collapse and system reset events. |
| Output Capacitor Discharge | Active bleeding via internal N-MOSFET (RDS(on) ≈ 100Ω) - ensures safe, rapid VOUT decay upon disable for sequencing compliance. |
| Thermal & Overcurrent Protection | 130°C shutdown with 30°C hysteresis + peak current limit (0.7–1.3A) - protects against sustained overload and PCB overheating. |
Applications
| Mobile Handset Power Rail | Li+-Powered Wearable MCU Core |
|---|---|
Use Scenario: Supplying 1.5V core voltage to baseband processor in WCDMA handsets operating from single Li+ cell. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 1.5V at up to 500mA with dynamic load handling across call/data modes. Use Value: 2.4MHz switching enables miniature 2.2µH inductor and 10µF ceramic caps, reducing total solution area to <0.5cm² while sustaining >90% efficiency at 200mA. |
Use Scenario: Powering ARM Cortex-M series MCU core in compact wearable devices with tight battery capacity constraints. IC Role / Device Role / Timing Role: Fixed-output buck converter providing stable 1.5V supply with automatic transition between ultrasonic PFM (standby) and PWM (active) modes. Use Value: 20µA quiescent current in skip mode maximizes shelf life and runtime between charges; 100% duty cycle extends usable battery range down to 1.8V input. |
| Portable Instrument Sensor Subsystem | MP3 Player Audio Codec Supply |
Use Scenario: Generating clean 1.5V rail for low-noise analog front-end and ADC in handheld test equipment. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter with low output ripple and fast transient response for precision measurement circuits. Use Value: Internal compensation and 0.8V reference ensure ±3% output accuracy across temperature, supporting calibrated sensor readings without trimming. |
Use Scenario: Supplying 1.5V to stereo audio codec IC in battery-operated MP3 players requiring silent operation. IC Role / Device Role / Timing Role: Ultrasonic PFM-capable buck regulator eliminating audible switching noise during playback and pause states. Use Value: Skip-mode operation above 20kHz prevents coil whine in audio-sensitive environments-verified by zero-cross detection and 16-cycle validation logic. |
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, 1.5V fixed output, 17µA IQ in PFM - smaller current rating and higher fSW. | Limited to ≤300mA loads; less suitable for baseband processors requiring 500mA peak. | Select when board space is more constrained than current demand and 300mA suffices. |
| RT8059GJ6 | 1.5MHz fSW, 600mA rated, 1.5V fixed, 25µA IQ - lower frequency requires larger inductor/capacitor. | Higher current headroom but larger solution size; no ultrasonic PFM mode. | Choose when thermal margin is critical and audible noise is not a concern in end application. |
Compared with TPS62231DRYR and RT8059GJ6, the ISL9103AIRUBZ-T uniquely balances 500mA capability, 2.4MHz operation, ultrasonic PFM, and 1.6×1.6mm footprint-making it optimal for space-constrained, battery-sensitive 1.5V rail designs where both performance and silence matter.
Availability
ISL9103AIRUBZ-T is available at Aetrix Electronics and suitable for mobile handset power rails, wearable MCU cores, portable instrument sensor subsystems, and MP3 player audio codec supplies requiring stable component supply and long-term lifecycle support.
Supply support for ISL9103AIRUBZ-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) is a global leader in microcontrollers, analog, and power management ICs, serving automotive, industrial, and consumer markets with high-reliability solutions.
The ISL9103AIRUBZ-T belongs to Renesas' legacy Intersil high-efficiency DC/DC converter family, designed specifically for ultra-compact, battery-powered portable electronics demanding low IQ, small footprint, and robust protection features.
FAQ
What is the output voltage tolerance of the ISL9103AIRUBZ-T over temperature and line conditions?
The ISL9103AIRUBZ-T provides a fixed 1.5V output with ±3% accuracy guaranteed over the full operating temperature range (-40°C to +85°C) and input line variation (2.7V to 6.0V). This specification is validated per the Electrical Specifications table on page 3 of FN6828 Rev 3.00 and applies directly to the ISL9103AIRUBZ-T fixed-output variant.
Does the ISL9103AIRUBZ-T support ultrasonic operation in skip mode?
Yes, the ISL9103AIRUBZ-T is an ISL9103A-series device and includes ultrasonic skip mode functionality, ensuring switching frequencies remain above 20kHz during light-load PFM operation to eliminate audible coil noise-a key feature confirmed in the Ordering Information table (ULTRASONIC FUNCTION = YES) and Features list of the ISL9103, ISL9103A datasheet.
What is the recommended inductor value for the ISL9103AIRUBZ-T?
The ISL9103AIRUBZ-T is characterized and optimized for use with a 2.2µH shielded power inductor, such as the Sumida CDRH2D14NP-2R2NC, as specified in the Typical Applications section (Figure 21) and Applications Information (page 11) of FN6828 Rev 3.00. This value balances ripple current, transient response, and solution size for the 2.4MHz switching frequency.
How does the ISL9103AIRUBZ-T handle output capacitor discharge during shutdown?
When the EN pin is pulled low, the ISL9103AIRUBZ-T activates an internal N-channel bleeding MOSFET (RDS(on) ≈ 100Ω) between FB and GND, actively discharging the output capacitor. This behavior is explicitly documented in the Pin Descriptions (Pin 2: EN) and Features ("Discharge Output Capacitor when Disabled") sections of the datasheet.
Is the ISL9103AIRUBZ-T pin-compatible with earlier ISL9103 variants like ISL9103IRUBZ-T?
Yes, the ISL9103AIRUBZ-T shares identical pinout, package (6-lead 1.6×1.6mm UTDFN), and electrical interface with the legacy ISL9103IRUBZ-T. Per the Ordering Information table, ISL9103IRUBZ-T is marked "No longer available, recommended replacement: ISL9103AIRUBZ-T", confirming direct functional and mechanical compatibility for drop-in replacement in existing designs.
ISL9103AIRUBZ-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:
- 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:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UTDFN (1.6x1.6)
ISL9103AIRUBZ-T FAQ
1.How can I place an order for ISL9103AIRUBZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9103AIRUBZ-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 ISL9103AIRUBZ-T reliable?
The price and inventory of ISL9103AIRUBZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9103AIRUBZ-T is usually 5 days.
3.What payment methods are accepted for ISL9103AIRUBZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9103AIRUBZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9103AIRUBZ-T?
ISL9103AIRUBZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9103AIRUBZ-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 ISL9103AIRUBZ-T?
For technical support, including ISL9103AIRUBZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9103AIRUBZ-T requirements.
6.How does Aetrix verify that ISL9103AIRUBZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9103AIRUBZ-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 ISL9103AIRUBZ-T meets industry standards.
7.What is the process for return or replacement of ISL9103AIRUBZ-T?
All ISL9103AIRUBZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9103AIRUBZ-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 ISL9103AIRUBZ-T part is unused and in its original packaging.
Return procedure for ISL9103AIRUBZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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