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Renesas ISL9103AIRUCZ-T
- Part No.:
- ISL9103AIRUCZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9103AIRUCZ-T.pdf
- Description:
- IC REG BUCK 1.8V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,291
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Product details
Overview
ISL9103AIRUCZ-T from Renesas (formerly Intersil) is a 500mA, 2.4MHz synchronous buck converter optimized for low-voltage microprocessor power in compact battery-powered devices. It delivers fixed 1.8V 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 core logic in WCDMA handsets and portable instruments.
For engineers reviewing the ISL9103AIRUCZ-T datasheet, ISL9103AIRUCZ-T pinout, ISL9103AIRUCZ-T application, or ISL9103AIRUCZ-T equivalent, this page provides verified technical context, package mapping, real-world application cards, and validated alternative parts for battery-powered DC-DC design and supply chain continuity planning.
Technical Context
The ISL9103AIRUCZ-T uses peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its 2.4MHz fixed-frequency operation under heavy load enables use of small 2.2µH inductors and 10µF ceramic capacitors, minimizing PCB area to <0.5cm².
Under light load, it automatically enters ultrasonic skip mode (PFM) - exclusive to the ISL9103A variant - reducing switching frequency while maintaining >13kHz operation to avoid audible noise. A zero-crossing detection circuit monitors 16 consecutive SW node current zero crossings before entering skip mode, and resumes PWM when output voltage drops 1.5% below nominal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±3% over line/load/temperature - eliminates external feedback divider and simplifies layout for stable core rail generation. |
| Input Voltage Range | 2.7V to 6.0V - supports single Li⁺ cell (2.7–4.2V), three NiMH cells (~3.6V), or regulated 5V input without external LDO pre-regulation. |
| Switching Frequency | 2.4MHz (1.9–2.75MHz range) - enables compact 2.2µH inductor and 10µF ceramic capacitors, reducing solution size and EMI filter complexity. |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime in standby or low-activity states of mobile phones and PDAs. |
| Shutdown Current | <1µA logic-controlled shutdown - ensures negligible battery drain during system sleep or power-off modes. |
| Max Output Current | 500mA guaranteed - sufficient for powering ARM Cortex-M cores, baseband processors, and RF transceivers in handheld devices. |
| Duty Cycle | 100% maximum - enables ultra-low dropout operation (<300mV at 500mA), extending usable battery life down to ~2.1V input for 1.8V output. |
Pinout & Package
ISL9103AIRUCZ-T is housed in a RoHS-compliant 6-pin Ultra-Thin Dual Flat No-Lead (UTDFN) package measuring 1.6mm × 1.6mm × 0.5mm, with exposed thermal pad for enhanced heat dissipation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.7–6.0V; requires local 10µF ceramic decoupling capacitor to minimize high-frequency switching noise on input rail. |
| EN (Pin 2) | Enable control input | Active-high logic interface; pulls internal discharge FET to rapidly bleed output capacitor when driven low, enabling 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 | Internally tied to 1.8V output for fixed-version operation; not used externally - eliminates resistor divider and associated accuracy drift. |
| GND (Pin 5) | Power ground reference | Primary return path for input/output currents and IC bias; 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 current - requires short, wide trace and isolation from noise-sensitive nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-channel 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 up to 95%. |
| Ultrasonic skip mode | Operates >13kHz in light-load PFM - prevents audible coil whine in mobile handsets and audio-enabled portable instruments. |
| Internal digital soft-start | 1.2ms controlled ramp - limits inrush current during power-up, preventing input rail collapse and protecting upstream battery or PMIC. |
| Output capacitor discharge | Active bleeding via internal N-MOSFET when EN = LOW - ensures rapid VOUT decay for safe system reset and avoids latch-up in downstream logic. |
| Thermal shutdown | 130°C trip with 30°C hysteresis - protects against sustained overload or poor heatsinking; auto-recovery at 100°C prevents thermal cycling damage. |
Applications
| Mobile Handset Power | Portable Instrument Core Rail |
|---|---|
|
Use Scenario: Powering baseband processor and RF transceiver in WCDMA handsets operating from single Li-ion cell. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.8V core voltage with dynamic load response to burst-mode transmission. Use Value: 2.4MHz switching and integrated MOSFETs enable sub-0.5cm² solution; 100% duty cycle extends talk time by 12–15 minutes near end-of-discharge. |
Use Scenario: Supplying FPGA I/O bank or microcontroller core in handheld test equipment with strict battery life targets. IC Role / Device Role / Timing Role: Fixed-output buck converter generating clean 1.8V rail with minimal external components and no feedback tuning. Use Value: 20µA skip-mode IQ doubles standby duration vs. legacy 100µA solutions; ultrasonic PFM eliminates audible interference during precision measurements. |
| PDA System-on-Chip Supply | MP3 Player DSP Core |
|
Use Scenario: Regulating power for ARM9-based SoC in palmtop PDA with multi-rail PMIC architecture. IC Role / Device Role / Timing Role: Secondary DC-DC stage providing dedicated 1.8V domain for CPU core, sequenced via EN pin. Use Value: Logic-controlled shutdown discharges output capacitance within 100µs, enabling deterministic power-down and fast wake-up from deep sleep. |
Use Scenario: Powering low-power DSP core in portable audio player during playback and decode operations. IC Role / Device Role / Timing Role: High-efficiency synchronous buck supplying 1.8V at 300mA peak, dynamically scaling with codec workload. Use Value: Peak efficiency >93% at 200mA reduces thermal load on plastic enclosure; 1.6×1.6mm UTDFN fits tight board real estate behind display module. |
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 | 2.25MHz, 300mA, 1.8V fixed, 25µA IQ, 6-pin WSON | Lower current rating; lacks ultrasonic skip mode and output discharge | Use where 300mA suffices and cost sensitivity outweighs battery-life optimization. |
| RT8059GJ6 | 1.5MHz, 600mA, adjustable only, 35µA IQ, 6-pin SOT-23 | Requires external feedback resistors; lower switching frequency increases inductor size; no output bleed function | Choose for designs needing adjustable output or higher current, accepting larger footprint and reduced light-load efficiency. |
Compared with TPS62231DRYR and RT8059GJ6, the ISL9103AIRUCZ-T uniquely combines 500mA capability, ultrasonic skip mode, and integrated output discharge in a 1.6×1.6mm UTDFN - making it optimal for space- and battery-limited WCDMA handset and portable instrument designs requiring deterministic power sequencing.
Availability
ISL9103AIRUCZ-T is available at Aetrix Electronics and suitable for mobile handset power, portable instrument core rails, PDA SoC supplies, and MP3 player DSP core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9103AIRUCZ-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 (acquired Intersil in 2017) is a global leader in power management and precision analog ICs, serving industrial, automotive, and consumer markets with high-reliability, energy-efficient solutions.
The ISL9103AIRUCZ-T belongs to Renesas' high-frequency synchronous buck converter family, designed specifically for ultra-compact, battery-powered portable electronics demanding high light-load efficiency, low-noise operation, and minimal external component count.
FAQ
What is the output voltage of the ISL9103AIRUCZ-T?
The ISL9103AIRUCZ-T delivers a fixed 1.8V output with ±3% accuracy over line, load, and temperature. This eliminates the need for external feedback resistors, simplifying design and improving long-term stability compared to adjustable variants. The FB pin is internally connected to the output, and no external divider is required for the ISL9103AIRUCZ-T.
Does the ISL9103AIRUCZ-T support ultrasonic skip mode?
Yes, the ISL9103AIRUCZ-T - as an ISL9103A-series part - supports ultrasonic skip mode (PFM), operating above 13kHz under light load to prevent audible coil whine. This feature is confirmed in the ordering table (ULTRASONIC FUNCTION = YES) and distinguishes it from non-A variants like the original ISL9103, which lack this capability.
How does the ISL9103AIRUCZ-T handle power-down sequencing?
The ISL9103AIRUCZ-T implements controlled power-down via its EN pin: when pulled low, it disables both internal MOSFETs and activates an internal bleeding FET to discharge the output capacitor rapidly. This ensures fast, deterministic VOUT decay - critical for clean reset behavior in microprocessors and FPGAs powered by the ISL9103AIRUCZ-T.
What package type and dimensions does the ISL9103AIRUCZ-T use?
The ISL9103AIRUCZ-T uses a 6-pin Ultra-Thin Dual Flat No-Lead (UTDFN) package, 1.6mm × 1.6mm × 0.5mm, with exposed thermal pad (PKG DWG. # L6.1.6x1.6). This RoHS-compliant, Pb-free package supports fine-pitch reflow and delivers superior thermal performance for high-density portable PCBs where the ISL9103AIRUCZ-T is commonly deployed.
What protection features are integrated into the ISL9103AIRUCZ-T?
The ISL9103AIRUCZ-T integrates overcurrent protection (OCP) with peak current limiting at ~0.95A, thermal shutdown at 130°C (30°C hysteresis), undervoltage lockout (UVLO) at 2.5V, and short-circuit protection (SCP) that reduces oscillator frequency during output faults. These functions operate autonomously without external components, enhancing system robustness in the ISL9103AIRUCZ-T's target applications.
ISL9103AIRUCZ-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):
- 1.8V
- 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)
ISL9103AIRUCZ-T FAQ
1.How can I place an order for ISL9103AIRUCZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9103AIRUCZ-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 ISL9103AIRUCZ-T reliable?
The price and inventory of ISL9103AIRUCZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9103AIRUCZ-T is usually 5 days.
3.What payment methods are accepted for ISL9103AIRUCZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9103AIRUCZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9103AIRUCZ-T?
ISL9103AIRUCZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9103AIRUCZ-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 ISL9103AIRUCZ-T?
For technical support, including ISL9103AIRUCZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9103AIRUCZ-T requirements.
6.How does Aetrix verify that ISL9103AIRUCZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9103AIRUCZ-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 ISL9103AIRUCZ-T meets industry standards.
7.What is the process for return or replacement of ISL9103AIRUCZ-T?
All ISL9103AIRUCZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9103AIRUCZ-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 ISL9103AIRUCZ-T part is unused and in its original packaging.
Return procedure for ISL9103AIRUCZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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