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Renesas ISL9104IRUDZ-T
- Part No.:
- ISL9104IRUDZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUDZ-T.pdf
- Description:
- IC REG BUCK 2V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,739
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Product details
Overview
ISL9104IRUDZ-T from Renesas (formerly Intersil) is a 500mA, 4.3MHz 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 ISL9104IRUDZ-T datasheet, ISL9104IRUDZ-T pinout, ISL9104IRUDZ-T application, or ISL9104IRUDZ-T equivalent, key selection criteria include light-load efficiency optimization, ultrasonic switching noise avoidance (not applicable to ISL9104IRUDZ-T), fixed-output voltage accuracy (±3%), thermal shutdown behavior, and compatibility with single Li⁺ cell input rails.
Technical Context
The ISL9104IRUDZ-T employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its architecture integrates a 0.8V bandgap reference, transconductance error amplifier, and zero-cross sensing circuit to enable automatic transition between fixed-frequency PWM (heavy load) and skip-mode (PFM) operation (light load).
It implements 100% duty-cycle low-dropout regulation when VIN approaches VOUT, uses internal digital soft-start to limit inrush current, and includes dedicated bleeding FET to discharge the output capacitor during shutdown. Overcurrent protection triggers at 0.75–1.35A peak switch current, and thermal shutdown activates at +130°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0V ±3% over temperature and line - ensures stable core voltage for low-power microcontrollers without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum - supports sustained operation of ARM Cortex-M0/M3 cores and RF front-end biasing in handheld devices. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li⁺ (2.7–4.2V), three NiMH (3.6V nominal), or regulated 5V supply rails. |
| Switching Frequency | 4.3MHz typical (3.6–4.9MHz range) - enables use of 1.0µH inductors and 4.7µF ceramic capacitors, minimizing solution footprint to <0.5cm². |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime in standby/sleep states of portable instrumentation and wearables. |
| Shutdown Current | <1µA logic-controlled - prevents parasitic drain during system-level power-off sequences. |
| Duty Cycle | 100% maximum - achieves <300mV dropout at 500mA, extending usable battery life down to ~2.3V input. |
Pinout & Package
ISL9104IRUDZ-T is housed in a RoHS-compliant, Pb-free 6-pin 1.6mm × 1.6mm µTDFN package with exposed thermal pad (L6.1.6x1.6 drawing). The package supports high thermal conductivity mounting and reflow-compatible assembly per IPC/JEDEC J-STD-020 MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input power supply connection | Accepts 2.7–6.0V; requires local 4.7µF X5R/X7R ceramic decoupling capacitor to minimize high-frequency switching noise on source rail. |
| EN (Pin 2) | Logic-enable control input | Active-high (1.4–6.0V); pulls internal discharge FET to rapidly bleed output capacitance when driven low; must not float. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating - no external tie or pull-up/down required. |
| FB (Pin 4) | Feedback reference node | Internally tied to 2.0V output for fixed-version operation; not user-accessible - eliminates need for external resistor divider. |
| GND (Pin 5) | Power ground reference | Primary return path for input/output currents and IC substrate; must be connected to solid ground plane adjacent to thermal pad. |
| SW (Pin 6) | Switching node | Connects to inductor high-side terminal; carries high di/dt square-wave voltage (0 to VIN); requires short, wide trace routing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated P- and N-channel MOSFETs (0.45Ω/0.40Ω typical RDS(on)) eliminate external rectifier, improving full-load efficiency up to 93% and reducing BOM count. |
| Adaptive Light-Load Control | Automatic transition from 4.3MHz PWM to skip-mode below ~10mA load - maintains >85% efficiency at 1mA while suppressing audible switching noise. |
| Digital Soft-Start | 1.0ms controlled ramp-up of output voltage - prevents inrush current into large output capacitors and avoids system brownout during power-on. |
| Output Capacitor Discharge | Internal bleeding FET activated on EN low - discharges output to <100mV within 1ms, enabling safe hot-swap and sequencing in multi-rail systems. |
| Robust Protection Suite | Peak current limiting (0.75–1.35A), thermal shutdown (+130°C), undervoltage lockout (2.5–2.7V), and short-circuit protection via FB monitoring ensure reliable field operation. |
Applications
| Mobile Phone Core Power | WCDMA Transceiver Bias |
|---|---|
|
Use Scenario: Powering application processor cores (e.g., Qualcomm Snapdragon S1/S2) in dual-mode cellular handsets operating from single Li⁺ battery. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 2.0V at up to 500mA with dynamic load response to CPU DVFS transitions. Use Value: 4.3MHz switching enables ultra-compact 1.0µH/4.7µF filter design; 20µA quiescent current extends standby time beyond 72 hours. |
Use Scenario: Supplying bias voltage to WCDMA power amplifier modules requiring tight voltage tolerance and fast transient recovery. IC Role / Device Role / Timing Role: Low-noise, high-PWM-frequency DC/DC stage placed directly adjacent to PA die to minimize impedance and EMI coupling. Use Value: 100% duty cycle supports operation down to 2.3V input as battery depletes; ±3% output accuracy maintains PA linearity and ACLR compliance. |
| Portable Medical Sensor Hub | Bluetooth LE Wearable SoC |
|
Use Scenario: Powering integrated sensor fusion platforms (accelerometer, gyroscope, ECG ADC) in FDA-class wearable monitors. IC Role / Device Role / Timing Role: Single-point-of-regulation for mixed-signal SoC with stringent low-noise and low-quiescent requirements. Use Value: Skip-mode operation sustains >90% efficiency at 50–200µA sleep currents; thermal shutdown protects against enclosure overheating during clinical use. |
Use Scenario: Supplying 2.0V rail to Bluetooth 5.0/5.1 SoCs (e.g., Nordic nRF52840) in compact earbuds and fitness trackers. IC Role / Device Role / Timing Role: High-efficiency, space-constrained buck converter supporting rapid wake-from-sleep transitions (<100µs recovery). Use Value: 1.6×1.6mm µTDFN package fits within 3.5mm × 3.5mm PCB area budget; internal soft-start prevents reset glitches during BLE advertising bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62231DRYR | Fixed 2.0V output, 4MHz switching, 300mA rated, 17µA IQ in PFM - lower current rating and smaller package (1.2×1.2mm DSBGA), no integrated bleed FET. | Best suited for sub-300mA SoC cores where board area is critical and output discharge is handled externally. | Select when max load ≤300mA and footprint <1.44mm² is mandatory; verify external discharge circuit if sequencing required. |
| Analog Devices ADP2119ACPZ-R7 | Adjustable 0.8–3.3V output, 3MHz switching, 600mA rated, 35µA IQ in PFM - higher current, wider VOUT range, but requires external feedback resistors and lacks bleed function. | Ideal for designs needing programmable output or higher current headroom, especially where multiple voltage rails share common inductor/capacitor footprints. | Choose when flexibility in output voltage or >500mA margin is needed; add R1/R2 and confirm stability with C3 compensation cap. |
Compared with TPS62231DRYR and ADP2119ACPZ-R7, the ISL9104IRUDZ-T uniquely combines fixed 2.0V accuracy, integrated output discharge, and 500mA capability in a 1.6×1.6mm footprint - making it optimal for space-constrained, single-rail mobile applications requiring robust sequencing and battery longevity.
Availability
ISL9104IRUDZ-T is available at Aetrix Electronics and suitable for mobile phone core power, WCDMA transceiver bias, portable medical sensor hubs, Bluetooth LE wearable SoCs, and compact industrial IoT edge nodes requiring stable component supply across production lifecycles.
Supply support for ISL9104IRUDZ-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 (formerly Intersil) is a global leader in high-performance analog and mixed-signal semiconductors, specializing in power management, precision analog, and interface solutions for mobile, industrial, and automotive markets.
The ISL9104IRUDZ-T belongs to Renesas' ultra-compact, high-frequency synchronous buck converter family designed specifically for battery-powered handheld equipment where minimal PCB area, low quiescent current, and reliable light-load efficiency are critical.
FAQ
What is the output voltage tolerance of the ISL9104IRUDZ-T over temperature and line conditions?
The ISL9104IRUDZ-T provides 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 PWM mode and applies to production-tested units - ensuring consistent core voltage delivery for microprocessors and RF ICs without external trimming.
Does the ISL9104IRUDZ-T support ultrasonic switching to avoid audible noise?
No, the ISL9104IRUDZ-T does not include ultrasonic skip-mode operation. That feature is exclusive to the ISL9104A variant (e.g., ISL9104AIRUDZ-T). The ISL9104IRUDZ-T operates at 4.3MHz in PWM mode and reduces frequency in skip-mode, but its light-load switching remains within the audible range - appropriate for non-acoustically sensitive applications like handheld instrumentation.
How does the ISL9104IRUDZ-T handle output capacitor discharge during shutdown?
When the EN pin is pulled low, the ISL9104IRUDZ-T activates an internal N-channel bleeding MOSFET connected between the FB/SW node and GND. This discharges the output capacitor through a ~100Ω on-resistance path, bringing VOUT to <100mV within 1ms - enabling safe power sequencing and preventing backfeed in multi-rail systems without external components.
What is the recommended inductor value and type for the ISL9104IRUDZ-T?
The ISL9104IRUDZ-T is optimized for a 1.0µH shielded power inductor with ≥600mA saturation current and low DC resistance (e.g., KEMET LB3218-T1R0MK). Using this value ensures stable operation across 2.7–6.0V input, maintains <30mV output ripple at 500mA, and aligns with the 4.3MHz switching frequency to minimize solution size and EMI emissions.
Can the ISL9104IRUDZ-T operate with a 2.5V input supply?
Yes, the ISL9104IRUDZ-T supports input voltages as low as 2.7V per absolute minimum rating - so 2.5V is below specification and not guaranteed. At 2.7V input, the device sustains 2.0V output only up to ~350mA due to dropout limitations; for reliable 500mA operation, VIN should be ≥2.85V to maintain sufficient headroom across process and temperature variation.
ISL9104IRUDZ-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:
- 4.3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UTDFN (1.6x1.6)
ISL9104IRUDZ-T FAQ
1.How can I place an order for ISL9104IRUDZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUDZ-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 ISL9104IRUDZ-T reliable?
The price and inventory of ISL9104IRUDZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUDZ-T is usually 5 days.
3.What payment methods are accepted for ISL9104IRUDZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUDZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUDZ-T?
ISL9104IRUDZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUDZ-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 ISL9104IRUDZ-T?
For technical support, including ISL9104IRUDZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUDZ-T requirements.
6.How does Aetrix verify that ISL9104IRUDZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUDZ-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 ISL9104IRUDZ-T meets industry standards.
7.What is the process for return or replacement of ISL9104IRUDZ-T?
All ISL9104IRUDZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUDZ-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 ISL9104IRUDZ-T part is unused and in its original packaging.
Return procedure for ISL9104IRUDZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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