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Renesas ISL9103AIRUDZ-T
- Part No.:
- ISL9103AIRUDZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9103AIRUDZ-T.pdf
- Description:
- IC REG BUCK 2V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,770
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Product details
Overview
ISL9103AIRUDZ-T from Intersil is a 500mA, 2.4MHz synchronous buck converter optimized for low-voltage microprocessors in space-constrained portable devices. It delivers a fixed 2.0V output from 2.7–6.0V input, features 20µA quiescent current in skip mode, 100% duty-cycle operation for <300mV dropout at 500mA, and integrates P- and N-channel MOSFETs with 0.45Ω/0.4Ω typical RDS(on). It powers WCDMA handsets and mobile phones requiring high light-load efficiency and ultrasonic switching noise suppression.
For engineers reviewing the ISL9103AIRUDZ-T datasheet, ISL9103AIRUDZ-T pinout, ISL9103AIRUDZ-T application, or ISL9103AIRUDZ-T equivalent, key selection criteria include its 2.0V fixed output, 2.4MHz PWM frequency enabling compact 2.2µH inductors, ultrasonic skip mode (ISL9103A variant), 1.6×1.6mm UTDFN package, and integrated quick-output-discharge functionality during shutdown.
Technical Context
The ISL9103AIRUDZ-T employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its voltage loop uses a precision 0.8V bandgap reference and transconductance error amplifier with internal RC compensation.
Under light load, it automatically enters ultrasonic skip mode (PFM) - triggered after 16 consecutive zero-crossing cycles at SW - reducing switching frequency while maintaining >100kHz operation to avoid audible noise. At heavy load, it reverts to fixed 2.4MHz PWM mode with typical 95% efficiency at 500mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0V ±3% over line/load/temperature - ensures stable core voltage for 2.0V I/O or logic rails without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum - supports single-core microprocessors or baseband ICs in cellular handsets. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li⁺ cell (2.7–4.2V), three NiMH cells, or regulated 5V supply. |
| Switching Frequency | 2.4MHz nominal (1.9–2.75MHz) - enables use of tiny 2.2µH inductors and 10µF ceramic capacitors, minimizing PCB area to <0.5cm². |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime in standby or low-activity states of portable equipment. |
| Shutdown Current | <1µA - ensures near-zero power drain when disabled, critical for long-term storage or deep-sleep modes. |
| Duty Cycle | 100% maximum - supports ultra-low dropout (<300mV at 500mA), extending usable battery life down to ~2.3V input. |
| Thermal Shutdown | 130°C threshold with 30°C hysteresis - provides robust protection during sustained overload or poor heatsinking. |
Pinout & Package
ISL9103AIRUDZ-T is housed in a RoHS-compliant 6-lead 1.6mm × 1.6mm Ultra-Thin Dual Flat No-Lead (UTDFN) package with exposed thermal pad. The package footprint occupies minimal board area and supports efficient thermal dissipation via PCB copper pour under the die pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6.0V supply; requires local 10µF ceramic decoupling capacitor to minimize input ripple and high-frequency noise. |
| EN (Pin 2) | Enable control | Active-high logic input; asserts soft-start on rising edge and activates internal output discharge path on falling edge. |
| NC (Pin 3) | No-connect | Internally unconnected; must be left floating per datasheet - no external tie or pull-up/down required. |
| FB (Pin 4) | Feedback node | Internally tied to fixed 2.0V reference; not user-accessible in this variant - eliminates need for external resistor divider. |
| GND (Pin 5) | Power ground | Primary return path for input/output currents; must be connected to solid ground plane adjacent to VIN and SW pins. |
| SW (Pin 6) | Switching node | Connects to inductor's high-side terminal; carries high di/dt square wave - requires short, wide trace and careful EMI layout. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-MOSFETs | 0.45Ω P-ch / 0.4Ω N-ch RDS(on) at 3.6V - eliminates external power switches, reduces BOM count, and improves full-load efficiency. |
| Ultrasonic Skip Mode | Operates >100kHz in PFM - prevents audible coil whine in handheld audio-sensitive applications like MP3 players and WCDMA handsets. |
| Digital Soft-Start | 1.2ms controlled ramp - limits inrush current during power-up, preventing input rail collapse and system brownouts. |
| Output Discharge | Internal bleeding FET (100Ω typical) - actively discharges output capacitor when EN is low, ensuring safe, rapid power-down sequencing. |
| Protection Suite | Peak current limiting (0.95A typ), over-temperature shutdown (130°C), undervoltage lockout (2.5V), and short-circuit foldback - enables robust standalone operation without external supervision. |
Applications
| Mobile Phone Power Management | WCDMA Handset Baseband Supply |
|---|---|
|
Use Scenario: Primary 2.0V supply for baseband processor and RF transceiver in dual-mode GSM/WCDMA handsets powered by single Li⁺ cell. IC Role / Device Role / Timing Role: Synchronous buck regulator delivering regulated 2.0V at up to 500mA with dynamic load step response <10µs. Use Value: Ultrasonic skip mode eliminates audible noise during call standby; 100% duty cycle extends talk time by 8–12 minutes near end-of-battery discharge. |
Use Scenario: Core voltage rail for WCDMA digital signal processor (DSP) and memory interface in compact form-factor handsets. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter supporting burst-mode processing loads with <1% output voltage deviation across 1–500mA. Use Value: 20µA quiescent current in skip mode reduces average system sleep current by 35%, directly increasing standby time to >300 hours. |
| Portable Medical Instrumentation | MP3 Player Audio Codec Supply |
|
Use Scenario: Stable 2.0V bias for low-power ADCs, sensor interfaces, and Bluetooth LE radio in handheld diagnostic tools. IC Role / Device Role / Timing Role: Low-noise, low-ripple power source with <10mVpp output ripple at 500mA - critical for 12-bit+ analog measurement accuracy. Use Value: Integrated soft-start and output discharge ensure clean power sequencing and meet IEC 60601-1 leakage current requirements during device reset. |
Use Scenario: Dedicated 2.0V supply for stereo audio DAC and headphone amplifier in battery-powered MP3 players. IC Role / Device Role / Timing Role: Efficient point-of-load regulator with fast transient recovery (<20µs) to maintain SNR during dynamic audio playback peaks. Use Value: 95% peak efficiency at 300mA reduces thermal load on plastic enclosure, enabling fanless design and extended continuous playback. |
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 | 2.0V fixed output, 3MHz switching, 400mA rated, 17µA IQ, 1.5×1.5mm DSBGA package | Lacks ultrasonic skip mode and output discharge; lower max current limits use in higher-load DSP applications | Preferred where board area is more constrained than acoustic noise or sequencing requirements |
| RT8059GJ6 | 2.0V fixed output, 2.5MHz, 500mA, 22µA IQ, 1.6×1.6mm WDFN package, no output discharge | Missing quick discharge function and ultrasonic PFM - may require external circuitry for safe power-down in medical devices | Suitable for cost-sensitive consumer audio where discharge timing is non-critical and layout allows standard PFM noise mitigation |
Compared with TPS62231DRYR and RT8059GJ6, ISL9103AIRUDZ-T uniquely combines 500mA capability, ultrasonic skip mode, and integrated output discharge in a 1.6×1.6mm UTDFN - making it optimal for WCDMA handsets and portable medical instruments requiring silent operation and strict power sequencing.
Availability
ISL9103AIRUDZ-T is available at Aetrix Electronics and suitable for mobile phone power management, WCDMA handset baseband supply, and portable medical instrumentation requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9103AIRUDZ-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
Intersil Corporation is a leading provider of power management and precision analog solutions, now part of Renesas Electronics, with expertise in high-efficiency DC-DC conversion for portable and battery-powered systems.
The ISL9103A family was designed specifically for compact, battery-operated devices demanding high light-load efficiency, ultrasonic noise suppression, and minimal PCB footprint - targeting next-generation cellular handsets and portable instrumentation.
FAQ
What is the output voltage tolerance of the ISL9103AIRUDZ-T over temperature and line conditions?
The ISL9103AIRUDZ-T provides a fixed 2.0V output with ±3% accuracy over the full operating temperature range (–40°C to +85°C) and input voltage range (2.7V to 6.0V). This specification is guaranteed in production test and ensures stable regulation for sensitive 2.0V logic and I/O rails without external trimming components.
Does the ISL9103AIRUDZ-T support automatic transition between PWM and skip modes?
Yes, the ISL9103AIRUDZ-T automatically transitions between fixed-frequency 2.4MHz PWM mode (under heavy load) and ultrasonic skip mode (under light load) without external control. The transition is based on zero-crossing detection at the SW node over 16 consecutive cycles, ensuring seamless, transparent operation for the host system.
Can the ISL9103AIRUDZ-T operate with a single Li⁺ cell throughout its full discharge curve?
Yes, the ISL9103AIRUDZ-T supports input voltages from 2.7V to 6.0V and features 100% duty-cycle operation. When input drops below ~2.3V, it maintains 2.0V output with <300mV dropout at 500mA, enabling full utilization of a single Li⁺ cell from 4.2V down to 2.7V - and partial operation down to ~2.3V before UVLO triggers.
Is an external feedback resistor divider required for the ISL9103AIRUDZ-T?
No. The ISL9103AIRUDZ-T is the fixed 2.0V output variant; its FB pin is internally connected to the 0.8V reference and output divider, eliminating the need for external resistors. Pin 4 (FB) must be connected directly to the output node per the datasheet - no external components are permitted on this pin.
What protection features are integrated into the ISL9103AIRUDZ-T?
The ISL9103AIRUDZ-T integrates peak current limiting (0.95A typical), thermal shutdown (130°C with 30°C hysteresis), undervoltage lockout (2.5V rising threshold), short-circuit foldback, and logic-controlled output discharge. These functions operate autonomously without external circuitry, ensuring robust operation in unattended portable systems.
ISL9103AIRUDZ-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):
- 2V
- 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)
ISL9103AIRUDZ-T FAQ
1.How can I place an order for ISL9103AIRUDZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9103AIRUDZ-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 ISL9103AIRUDZ-T reliable?
The price and inventory of ISL9103AIRUDZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9103AIRUDZ-T is usually 5 days.
3.What payment methods are accepted for ISL9103AIRUDZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9103AIRUDZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9103AIRUDZ-T?
ISL9103AIRUDZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9103AIRUDZ-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 ISL9103AIRUDZ-T?
For technical support, including ISL9103AIRUDZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9103AIRUDZ-T requirements.
6.How does Aetrix verify that ISL9103AIRUDZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9103AIRUDZ-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 ISL9103AIRUDZ-T meets industry standards.
7.What is the process for return or replacement of ISL9103AIRUDZ-T?
All ISL9103AIRUDZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9103AIRUDZ-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 ISL9103AIRUDZ-T part is unused and in its original packaging.
Return procedure for ISL9103AIRUDZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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