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Renesas ISL9103IRUDZ-T
- Part No.:
- ISL9103IRUDZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9103IRUDZ-T.pdf
- Description:
- IC REG BUCK 2V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,782
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Product details
Overview
ISL9103IRUDZ-T from Intersil is a 500mA, 2.4MHz synchronous buck converter optimized for low-voltage microprocessor power in compact battery-powered devices. It delivers 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 in a 1.6×1.6mm µTDFN package.
For engineers reviewing the ISL9103IRUDZ-T datasheet, ISL9103IRUDZ-T pinout, ISL9103IRUDZ-T application, or ISL9103IRUDZ-T equivalent, key selection considerations include light-load efficiency optimization via skip-mode operation, ultralow shutdown current (<1µA), integrated soft-start, output capacitor discharge on disable, and compatibility with single Li+-cell or regulated 5V supplies.
Technical Context
The ISL9103IRUDZ-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 supports fixed-output configuration without external resistors.
Under light load, it autonomously enters pulse-skipping (PFM) mode after detecting 16 consecutive zero-crossings at the SW node, reducing switching frequency to minimize losses. At heavy load, it operates in fixed-frequency 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, and temperature - enables direct powering of 2.0V I/O domains without external feedback resistors. |
| Input Voltage Range | 2.7V to 6.0V - supports single Li+ cell (2.7–4.2V), three NiMH cells, or regulated 5V rail without external LDO pre-regulation. |
| Max Output Current | 500mA guaranteed minimum - sufficient for ARM Cortex-M cores, baseband processors, and sensor hubs in portable devices. |
| Switching Frequency | 2.4MHz nominal (1.9–2.75MHz range) - allows use of small 2.2µH inductors and 10µF ceramic capacitors, minimizing PCB area to <0.5cm². |
| Quiescent Current | 20µA typical in skip mode - extends battery runtime in standby/sleep states of handheld electronics. |
| Shutdown Current | <1µA logic-controlled - ensures near-zero system leakage when disabled, critical for always-on subsystems. |
| Duty Cycle Range | 0–100% - enables ultra-low dropout operation (<300mV at 500mA), sustaining regulation as input voltage decays near battery end-of-life. |
Pinout & Package
ISL9103IRUDZ-T is housed in a Pb-free, RoHS-compliant 6-lead 1.6mm × 1.6mm µTDFN package (Intersil pkg drawing L6.1.6x1.6) with exposed thermal pad. The package supports high-density layout and efficient heat dissipation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6.0V supply; requires local 10µF ceramic decoupling to GND for stable high-frequency operation. |
| EN (Pin 2) | Enable control | Active-high logic input; asserts soft-start on rising edge and discharges output capacitor via internal bleeding FET on falling edge. |
| NC (Pin 3) | No-connect | Internally unconnected; must be left floating - no external tie or pull-up/down required. |
| FB (Pin 4) | Feedback sense | Internally tied to 2.0V output for fixed-version operation; not user-accessible - eliminates external resistor divider. |
| GND (Pin 5) | Ground reference | Primary return path for power and signal; must be connected to solid ground plane adjacent to VIN and SW traces. |
| SW (Pin 6) | Switching node | Connects to inductor's high-side terminal; carries high di/dt square wave - requires short, wide trace and minimal loop area. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | P- and N-channel MOSFETs with 0.45Ω/0.40Ω typical RDS(on) at 3.6V - eliminates external diode, improves full-load efficiency to 95%. |
| Digital soft-start | 1.2ms controlled ramp - prevents inrush current into output capacitance, avoiding input rail droop during power-up sequencing. |
| Output capacitor discharge | Internal bleeding FET activated on EN low - rapidly discharges VOUT to safe levels within milliseconds, meeting system-level safety requirements. |
| Overcurrent and thermal protection | Peak current limit of 0.95A and thermal shutdown at 130°C with 30°C hysteresis - protects against short-circuit and sustained overload without external components. |
| Ultralow IQ skip mode | 20µA quiescent current with ultrasonic switching frequency - avoids audible noise while maximizing battery life in intermittent-load applications like Bluetooth LE sensors. |
Applications
| Mobile Phone Baseband Power | WCDMA Transceiver Core Supply |
|---|---|
|
Use Scenario: Powers baseband processor core (e.g., Qualcomm MSM series) from single Li+ cell in slim smartphones. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 2.0V at up to 500mA with dynamic load response to burst-mode RF transmission. Use Value: 100% duty-cycle operation sustains regulation down to 2.3V input, extending usable battery capacity by >15% versus non-dropout converters. |
Use Scenario: Supplies WCDMA transceiver analog core requiring clean, low-noise 2.0V rail in handset front-end modules. IC Role / Device Role / Timing Role: Fixed-output buck converter with integrated soft-start and output discharge - ensures precise power sequencing and fast reset recovery. Use Value: 2.4MHz switching frequency places noise spectrum above sensitive IF bands, reducing need for additional EMI filtering components. |
| Portable Medical Sensor Hub | PDA Application Processor Rail |
|
Use Scenario: Powers multi-sensor fusion hub (ECG, SpO₂, accelerometer) in wearable health monitors operating 72+ hours per charge. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter managing intermittent 500mA peak loads while maintaining <20µA sleep current. Use Value: Skip-mode operation reduces average input current by 3× vs. forced-PWM at 1mA load, directly increasing battery longevity. |
Use Scenario: Generates 2.0V I/O supply for ARM9-based PDA application processors with dynamic voltage scaling. IC Role / Device Role / Timing Role: Compact synchronous buck regulator enabling <0.5cm² total solution size - critical for thin clamshell form factors. Use Value: 1.6×1.6mm µTDFN package with thermal pad achieves 160°C/W θJA, allowing continuous 500mA operation without heatsink. |
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 frequency, 300mA rated output, 1.8V fixed option only - lacks 100% duty-cycle and output discharge. | Suitable for lower-current 1.8V rails; not drop-in for 2.0V/500mA designs requiring deep-discharge capability. | Select if board space permits larger inductor and system does not require output bleed function. |
| RT8059NGSP | 2.5MHz, 600mA, 2.0V fixed output, but uses external FB divider - adds BOM cost and layout complexity. | Requires resistor network for 2.0V setting; no integrated discharge FET - needs external circuitry for safe shutdown. | Choose only if existing design already uses RT8059 footprint and can accommodate added passive components. |
Compared with TPS62231DRYR and RT8059NGSP, ISL9103IRUDZ-T uniquely combines 500mA capability, true 2.0V fixed output, 100% duty-cycle dropout, and integrated output discharge in a 1.6mm² package - making it optimal for space- and battery-life-constrained portable systems where reliability and simplicity are prioritized.
Availability
ISL9103IRUDZ-T is available at Aetrix Electronics and suitable for mobile phone baseband power, WCDMA transceiver core supply, and portable medical sensor hub applications requiring stable component supply across product lifecycles.
Supply support for ISL9103IRUDZ-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 (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in high-performance analog and power management ICs for portable, industrial, and communications markets.
The ISL9103 family was designed specifically for ultra-compact, battery-powered handheld devices requiring high efficiency at light loads, fast transient response, and minimal external component count - targeting PDAs, cellular handsets, and MP3 players circa 2009–2012.
FAQ
What is the output voltage tolerance of the ISL9103IRUDZ-T over temperature and line variations?
The ISL9103IRUDZ-T provides ±3% output voltage accuracy over the full operating temperature range (−40°C to +85°C) and input line variation (2.7V to 6.0V). This specification applies specifically to the fixed 2.0V version and is guaranteed without external feedback components - ensuring consistent rail stability across battery discharge profiles and ambient conditions in portable designs.
Does the ISL9103IRUDZ-T support 100% duty-cycle operation, and what is its practical dropout voltage at 500mA?
Yes, the ISL9103IRUDZ-T supports 100% duty-cycle operation to maintain regulation under low-input conditions. At 500mA load, its dropout voltage is less than 300mV - calculated from the P-channel MOSFET's typical RDS(on) of 0.45Ω at 3.6V input. This enables sustained 2.0V output down to ~2.3V input, significantly extending usable battery life in single-cell Li+ applications.
How does the ISL9103IRUDZ-T manage output capacitor discharge during shutdown?
The ISL9103IRUDZ-T integrates a dedicated N-channel bleeding MOSFET that activates automatically when the EN pin is driven low. This internal path discharges the output capacitor rapidly - typically within milliseconds - eliminating residual voltage that could interfere with system reset sequencing or violate safety requirements in medical or industrial portable equipment.
What is the quiescent current of the ISL9103IRUDZ-T in skip mode, and how does it compare to PWM mode?
The ISL9103IRUDZ-T draws 20µA typical quiescent current in skip (PFM) mode at no load, optimized for maximum light-load efficiency. In contrast, fixed-frequency PWM mode increases IQ to ~1.2mA under same conditions. This 60× reduction minimizes battery drain during standby, making ISL9103IRUDZ-T especially effective in intermittently active devices like Bluetooth peripherals and wearables.
Is the ISL9103IRUDZ-T pin-compatible with other variants in the ISL9103 family, such as ISL9103IRUNZ-T or ISL9103AIRUDZ-T?
Yes, all ISL9103 and ISL9103A variants - including ISL9103IRUDZ-T, ISL9103IRUNZ-T (3.3V), and ISL9103AIRUDZ-T (2.0V with ultrasonic skip mode) - share identical 6-lead 1.6×1.6mm µTDFN packaging and pinout. However, ISL9103IRUDZ-T lacks the ultrasonic skip-mode feature present in ISL9103A versions, so audio-sensitive designs requiring inaudible operation must select the 'A' suffix variant.
ISL9103IRUDZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 6-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
ISL9103IRUDZ-T FAQ
1.How can I place an order for ISL9103IRUDZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9103IRUDZ-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 ISL9103IRUDZ-T reliable?
The price and inventory of ISL9103IRUDZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9103IRUDZ-T is usually 5 days.
3.What payment methods are accepted for ISL9103IRUDZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9103IRUDZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9103IRUDZ-T?
ISL9103IRUDZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9103IRUDZ-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 ISL9103IRUDZ-T?
For technical support, including ISL9103IRUDZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9103IRUDZ-T requirements.
6.How does Aetrix verify that ISL9103IRUDZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9103IRUDZ-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 ISL9103IRUDZ-T meets industry standards.
7.What is the process for return or replacement of ISL9103IRUDZ-T?
All ISL9103IRUDZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9103IRUDZ-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 ISL9103IRUDZ-T part is unused and in its original packaging.
Return procedure for ISL9103IRUDZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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