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Renesas ISL9103AIRUJZ-T
- Part No.:
- ISL9103AIRUJZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9103AIRUJZ-T.pdf
- Description:
- IC REG BUCK 2.8V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,505
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Product details
Overview
ISL9103AIRUJZ-T from Renesas (formerly Intersil) is a 500mA, 2.4MHz synchronous buck converter optimized for single Li+-cell-powered portable electronics. It delivers fixed 2.8V output with ±3% accuracy over temperature and line, operates from 2.7V–6.0V input, and achieves up to 95% efficiency at full load. Its 20µA quiescent current in skip mode extends battery life in mobile phones and WCDMA handsets.
For engineers reviewing the ISL9103AIRUJZ-T datasheet, ISL9103AIRUJZ-T pinout, ISL9103AIRUJZ-T application, or ISL9103AIRUJZ-T equivalent, key selection criteria include ultrasonic skip-mode operation (eliminating audible noise), 100% duty-cycle low-dropout capability (<300mV dropout at 500mA), integrated P/N-MOSFETs, and 1.6×1.6mm UTDFN package footprint.
Technical Context
The ISL9103AIRUJZ-T uses peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its oscillator runs at 2.4MHz under heavy load and automatically transitions to ultrasonic skip mode (PFM) under light load-detected via 16-cycle zero-crossing sensing on the SW node.
It integrates a 0.8V bandgap reference, transconductance error amplifier with internal RC compensation, and dedicated protection blocks: undervoltage lockout (2.5V threshold), thermal shutdown (130°C), overcurrent (0.7–1.3A peak limit), and short-circuit detection via FB voltage monitoring. The EN pin enables power sequencing and triggers active output capacitor discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500mA guaranteed minimum-supports microprocessor core rails in compact handheld devices without external current boosting. |
| Switching Frequency | 2.4MHz typical-enables use of 2.2µH inductor and 10µF ceramic capacitors, reducing total solution size to <0.5cm². |
| Quiescent Current | 20µA in skip mode-maximizes battery runtime during standby or light-load states in always-on mobile applications. |
| Input Voltage Range | 2.7V to 6.0V-compatible with single Li-ion (2.7–4.2V), three NiMH cells, or regulated 5V supplies. |
| Output Voltage | Fixed 2.8V with ±3% accuracy over -40°C to +85°C-meets tight regulation requirements for RF front-end biasing and baseband ICs. |
| Duty Cycle | 100% maximum-ensures <300mV dropout at 500mA, extending usable battery range down to ~3.1V for 2.8V output. |
| Shutdown Current | <1µA logic-controlled-minimizes system leakage when disabled, critical for long-term storage or deep-sleep modes. |
Pinout & Package
ISL9103AIRUJZ-T is housed in a RoHS-compliant 6-lead Ultra Thin Dual Flat No-Lead (UTDFN) package measuring 1.6mm × 1.6mm × 0.5mm, with wettable flank terminations for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.7–6.0V; requires 10µF ceramic decoupling capacitor placed adjacent to pin for stable high-frequency operation. |
| EN (Pin 2) | Enable control input | Active-high logic interface; pulls internal discharge FET when low to rapidly bleed output capacitor-enables clean power sequencing. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating-no external tie or pull-up/down required. |
| FB (Pin 4) | Feedback reference node | Directly connected to 2.8V output (fixed version); senses 0.8V internal reference-no external resistor divider needed. |
| GND (Pin 5) | Power ground return | Primary ground reference for all internal circuits and switching node; must be tied to low-impedance PCB ground plane. |
| SW (Pin 6) | Switching node | Connects to inductor's high-side terminal; carries high di/dt square wave-requires short, wide trace to minimize EMI and voltage spikes. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic skip mode | Eliminates audible coil whine in mobile handsets by operating PFM above 20kHz-specific to ISL9103A variant (ISL9103AIRUJZ-T). |
| Integrated MOSFETs | P-Channel (0.45Ω typ) and N-Channel (0.4Ω typ) switches reduce BOM count and improve efficiency vs. external-FET solutions. |
| Internal digital soft-start | 1.2ms controlled ramp limits inrush current-prevents input rail collapse during power-up in battery-constrained systems. |
| Output capacitor discharge | Active bleeding FET discharges output within milliseconds of EN deactivation-ensures safe reset and prevents back-powering. |
| Thermal shutdown with hysteresis | 130°C trip with 30°C hysteresis (100°C recovery)-protects against sustained overload while avoiding thermal cycling instability. |
Applications
| Mobile Phone Power Management | WCDMA Handset RF Biasing |
|---|---|
Use Scenario: Supplying 2.8V bias to power amplifier modules in 3G/4G smartphones with single-cell Li-ion battery input. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 2.8V at up to 500mA with fast load transient response to PA burst modes. Use Value: Ultrasonic skip mode prevents audible noise during standby; 100% duty cycle maintains regulation down to 3.1V input-extending talk time. |
Use Scenario: Providing low-noise, tightly regulated 2.8V to WCDMA transceiver RF sections where supply ripple directly impacts EVM. IC Role / Device Role / Timing Role: Fixed-output buck converter with integrated compensation-reducing external component count while meeting spectral purity requirements. Use Value: 20µA quiescent current minimizes idle drain; ±3% output accuracy ensures consistent PA gain across temperature and battery aging. |
| Portable Instrument Core Logic | MP3 Player Baseband IC Supply |
Use Scenario: Powering ARM Cortex-M based microcontrollers and sensors in handheld test equipment with limited PCB area. IC Role / Device Role / Timing Role: Compact 1.6×1.6mm DC-DC converter enabling high-density layout while maintaining 500mA headroom for sensor bursts. Use Value: 2.4MHz switching allows tiny 2.2µH inductor and 10µF ceramics-achieving full solution size under 0.5cm² including passives. |
Use Scenario: Generating 2.8V for audio codec and flash memory controllers in battery-operated MP3 players. IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulator with automatic PWM/PFM transition-optimizing efficiency across playback, pause, and record states. Use Value: 95% peak efficiency reduces heat generation; less than 1µA shutdown current preserves charge during weeks of storage. |
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 | 2.0–6.0V input, 3.0V fixed output, 400mA rated, 3.6MHz switching, no ultrasonic PFM. | Lacks ultrasonic skip mode-may generate audible noise in quiet environments; lower output current limits use in higher-power subsystems. | Select when 3.0V output and higher frequency (smaller inductor) are prioritized over acoustic performance and 500mA headroom. |
| RT8059GJ6 | 2.5–5.5V input, adjustable output (0.6–5.0V), 600mA rated, 2.5MHz switching, no integrated discharge FET. | Requires external resistor divider for 2.8V setting; lacks active output discharge-needs external circuitry for clean sequencing. | Choose for designs needing output voltage flexibility or higher current margin, accepting added BOM cost and layout complexity. |
Compared with TPS62231DRYR and RT8059GJ6, the ISL9103AIRUJZ-T uniquely combines fixed 2.8V output, ultrasonic skip mode, integrated output discharge, and 500mA capability in a 1.6×1.6mm footprint-making it optimal for space-constrained, acoustically sensitive Li+-cell applications.
Availability
ISL9103AIRUJZ-T is available at Aetrix Electronics and suitable for mobile phone power management, WCDMA handset RF biasing, portable instrument core logic, and MP3 player baseband IC supply requiring stable component supply and long-term lifecycle support.
Supply support for ISL9103AIRUJZ-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 silicon solutions.
The ISL9103A family was designed specifically for ultra-compact, battery-powered portable electronics-emphasizing low IQ, ultrasonic operation, minimal footprint, and seamless integration into space-constrained Li+-cell platforms.
FAQ
What is the output voltage of the ISL9103AIRUJZ-T?
The ISL9103AIRUJZ-T provides a fixed 2.8V output voltage with ±3% accuracy over the full operating temperature range (-40°C to +85°C) and input line variations. This is factory-trimmed and does not require external feedback resistors-simplifying design and improving stability compared to adjustable variants.
Does the ISL9103AIRUJZ-T support ultrasonic skip mode?
Yes, the ISL9103AIRUJZ-T is an ISL9103A-series device and includes ultrasonic skip mode (PFM), which operates above 20kHz to eliminate audible coil whine. This feature is explicitly enabled in the ISL9103A variant and confirmed in the ordering table for part marking J9.
What package type and dimensions does the ISL9103AIRUJZ-T use?
The ISL9103AIRUJZ-T uses a 6-lead Ultra Thin Dual Flat No-Lead (UTDFN) package with dimensions 1.6mm × 1.6mm × 0.5mm (thickness ±0.05mm). It features wettable flanks and complies with RoHS standards, supporting standard Pb-free reflow profiles per IPC/JEDEC J-STD-020.
How does the ISL9103AIRUJZ-T handle output capacitor discharge?
The ISL9103AIRUJZ-T includes an internal N-channel bleeding MOSFET that actively discharges the output capacitor when the EN pin is driven low. This ensures rapid, controlled discharge-critical for safe power sequencing and preventing back-powering of upstream circuitry during shutdown.
What is the maximum guaranteed output current for the ISL9103AIRUJZ-T?
The ISL9103AIRUJZ-T guarantees a minimum output current of 500mA across the full operating temperature range (-40°C to +85°C) and input voltage range (2.7V to 6.0V). This rating accounts for thermal derating and internal MOSFET ON-resistance-ensuring reliable operation in real-world handheld thermal environments.
ISL9103AIRUJZ-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):
- 2.8V
- 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)
ISL9103AIRUJZ-T FAQ
1.How can I place an order for ISL9103AIRUJZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9103AIRUJZ-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 ISL9103AIRUJZ-T reliable?
The price and inventory of ISL9103AIRUJZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9103AIRUJZ-T is usually 5 days.
3.What payment methods are accepted for ISL9103AIRUJZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9103AIRUJZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9103AIRUJZ-T?
ISL9103AIRUJZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9103AIRUJZ-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 ISL9103AIRUJZ-T?
For technical support, including ISL9103AIRUJZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9103AIRUJZ-T requirements.
6.How does Aetrix verify that ISL9103AIRUJZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9103AIRUJZ-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 ISL9103AIRUJZ-T meets industry standards.
7.What is the process for return or replacement of ISL9103AIRUJZ-T?
All ISL9103AIRUJZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9103AIRUJZ-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 ISL9103AIRUJZ-T part is unused and in its original packaging.
Return procedure for ISL9103AIRUJZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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