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Renesas ISL9104IRUDZ-T7A
- Part No.:
- ISL9104IRUDZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUDZ-T7A.pdf
- Description:
- IC REG BUCK 2V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,300
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Product details
Overview
ISL9104IRUDZ-T7A from Renesas Electronics (formerly Intersil) is a 500mA, 4.3MHz synchronous buck DC-DC converter optimized for low-voltage microprocessor power in space-constrained portable 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 integrated P/N-channel MOSFETs. It powers core logic in WCDMA handsets and MP3 players.
For engineers reviewing the ISL9104IRUDZ-T7A datasheet, ISL9104IRUDZ-T7A pinout, ISL9104IRUDZ-T7A application, or ISL9104IRUDZ-T7A equivalent, key selection criteria include its 2.0V fixed output, 4.3MHz switching frequency enabling µH-scale inductors, ultralow light-load IQ, internal soft-start, and thermal/overcurrent protection - all in a 1.6×1.6mm µTDFN package.
Technical Context
The ISL9104IRUDZ-T7A employs peak-current-mode PWM control with slope compensation for fast transient response and cycle-by-cycle current limiting. Its architecture integrates a 0.8V bandgap reference, transconductance error amplifier, and zero-crossing detection circuit to enable automatic transition between fixed-frequency PWM (heavy load) and pulse-skipping PFM (light load).
It implements 100% duty-cycle low-dropout operation using an internal P-channel high-side switch, with ON-resistance of 0.45Ω (typ) at VIN = 3.6V. The device includes dedicated internal bleeding FET (100Ω ON-resistance) to discharge the output capacitor during shutdown, and uses digital soft-start with ~1ms ramp time to limit inrush current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0V ±3% over line/load/temperature - ensures stable core supply for 2.0V I/O or logic rails without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum - supports moderate-power microcontrollers and baseband processors in handheld devices. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li+ cell (2.7–4.2V), three NiMH cells (~3.6V), or regulated 5V rail. |
| Switching Frequency | 4.3MHz (3.6–4.9MHz range) - enables use of 1.0µH inductors and 4.7µF 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 | 0.05µA typical - reduces system leakage when powered off, critical for long-term storage or sleep modes. |
| Duty Cycle | 100% maximum - supports ultra-low dropout (<300mV at 500mA), extending usable battery voltage down to VOUT + dropout. |
Pinout & Package
ISL9104IRUDZ-T7A is housed in a Pb-free, RoHS-compliant 6-pin 1.6mm × 1.6mm µTDFN package with exposed thermal pad (package drawing L6.1.6x1.6). Pin 3 is NC (no connect); all other pins are electrically active and require proper routing per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6.0V supply; requires local 4.7µF ceramic decoupling capacitor to minimize high-frequency noise injection. |
| EN (Pin 2) | Enable control | Logic-high (>1.4V) enables regulation and soft-start; logic-low (<0.4V) disables converter and activates internal output capacitor bleed path. |
| NC (Pin 3) | No connect | Internally unconnected; must be left floating - no external connection 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 and associated accuracy drift. |
| GND (Pin 5) | Ground reference | Primary return path for power and signal; must be connected to solid ground plane adjacent to VIN and SW pins for EMI control. |
| SW (Pin 6) | Switch node | Connects to inductor high-side terminal; carries high di/dt switching current - requires short, wide trace and careful isolation from noise-sensitive nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | P- and N-channel MOSFETs with 0.45Ω/0.40Ω (typ) ON-resistance reduce conduction loss and eliminate external diode, improving full-load efficiency up to 93%. |
| Ultralow quiescent current | 20µA typical in skip mode - extends battery life in always-on or intermittent-use applications such as mobile audio playback. |
| Digital soft-start | ~1ms controlled output ramp - prevents inrush current into downstream capacitance, avoiding input rail collapse during power-up. |
| Active output discharge | Internal bleeding FET discharges output capacitor when EN is low - ensures rapid, predictable VOUT decay for safe sequencing in multi-rail systems. |
| Comprehensive protection | Peak current limiting, thermal shutdown (130°C trip, 30°C hysteresis), undervoltage lockout (2.5V threshold), and short-circuit protection prevent fault-induced damage. |
Applications
| WCDMA Handset Baseband Power | Portable MP3 Player Core Supply |
|---|---|
|
Use Scenario: Powers baseband processor and RF interface ICs in 3G 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 handling during call setup and data bursts. Use Value: 4.3MHz switching enables compact 1.0µH inductor and 4.7µF output cap, reducing solution size while maintaining >90% efficiency across 10mA–500mA load range. |
Use Scenario: Supplies core voltage to ARM-based audio SoC in battery-powered MP3 players with extended playback time requirements. IC Role / Device Role / Timing Role: Fixed-output buck converter providing regulated 2.0V rail with automatic PFM/PWM mode transition to optimize efficiency at varying decode workloads. Use Value: 20µA skip-mode IQ minimizes idle power loss, directly increasing battery life by >15% versus comparable 100µA-Q devices under typical listening duty cycles. |
| PDA Application Processor Rail | Ultra-Compact Instrument Logic Supply |
|
Use Scenario: Generates 2.0V logic supply for application processors in palm-sized PDAs with tight board area constraints. IC Role / Device Role / Timing Role: High-frequency synchronous buck regulator supporting rapid load transients during GUI rendering and touch response. Use Value: 100% duty-cycle operation maintains regulation down to VIN = 2.3V, extracting maximum energy from aging Li+ cells before system shutdown. |
Use Scenario: Powers FPGA configuration logic and sensor interface circuitry in handheld test instruments requiring clean, stable 2.0V supply. IC Role / Device Role / Timing Role: Low-noise, thermally robust DC-DC converter with internal soft-start and output discharge for reliable cold-boot and reset behavior. Use Value: Integrated thermal shutdown (130°C) and overcurrent protection ensure continuous operation in sealed enclosures without forced airflow or heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS62231DRYR | Fixed 2.0V output, 4.5MHz switching, 300mA rated, 17µA IQ in PFM mode, 1.5mm × 1.5mm DSBGA package. | Limited to 300mA max output - insufficient for 500mA peak loads in WCDMA baseband or PDA processors. | Select only if load current remains ≤300mA and board space allows DSBGA rework; verify thermal performance at 300mA in target enclosure. |
| Analog Devices ADP2119ACPZ-R7 | Adjustable 0.8–3.3V output, 3MHz switching, 600mA rated, 25µA IQ in PFM, 2mm × 2mm LFCSP package. | Requires external FB resistors for 2.0V setting; lacks integrated output discharge; larger footprint increases PCB area by 56%. | Choose when adjustable output or higher current headroom is needed, but accept added BOM cost, layout complexity, and reduced integration. |
Compared with ISL9104IRUDZ-T7A, the TPS62231DRYR offers slightly lower IQ but insufficient current capability, while the ADP2119ACPZ-R7 provides higher current and flexibility at the cost of external components, larger size, and missing active discharge - making ISL9104IRUDZ-T7A optimal for space- and battery-life-constrained 2.0V/500mA applications.
Availability
ISL9104IRUDZ-T7A is available at Aetrix Electronics and suitable for WCDMA handset design, portable audio player development, PDA application processor power, and ultra-compact instrument logic supply requiring stable component supply and long-term lifecycle support.
Supply support for ISL9104IRUDZ-T7A 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) designs high-performance analog and power management semiconductors for mobile, computing, and industrial markets, with ISO9001-certified manufacturing and global quality systems.
The ISL9104IRUDZ-T7A belongs to Renesas' legacy Intersil synchronous buck regulator family, engineered specifically for ultra-compact, battery-powered portable electronics demanding high efficiency at light loads and minimal PCB footprint.
FAQ
What is the output voltage of the ISL9104IRUDZ-T7A?
The ISL9104IRUDZ-T7A is a fixed-output buck converter delivering 2.0V ±3% over line, load, and temperature. This value is factory-trimmed and internally set - no external feedback resistors are required or supported. The FB pin is internally connected to the output, confirming its role as a dedicated 2.0V regulator variant within the ISL9104 family.
Does the ISL9104IRUDZ-T7A support automatic PFM/PWM mode switching?
Yes, the ISL9104IRUDZ-T7A automatically transitions between fixed-frequency PWM mode (under heavy load) and pulse-skipping PFM mode (under light load) without external control. This behavior is implemented via internal zero-crossing detection and a 16-cycle counter, enabling 20µA typical quiescent current in skip mode while maintaining regulation accuracy and transient response.
What protection features does the ISL9104IRUDZ-T7A include?
The ISL9104IRUDZ-T7A integrates overcurrent protection (OCP) via peak-current limiting, 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. It also features internal digital soft-start and active output capacitor discharge upon disable via the EN pin.
Can the ISL9104IRUDZ-T7A operate with a single Li+ cell input?
Yes, the ISL9104IRUDZ-T7A operates from 2.7V to 6.0V, fully supporting single Li+ battery input (nominal 3.7V, discharged to 2.7V). Its 100% duty-cycle capability ensures regulation down to VIN = VOUT + dropout (~2.3V minimum), maximizing usable battery capacity. Efficiency exceeds 90% at 200mA with VIN = 3.6V and VOUT = 2.0V.
What is the package type and thermal performance of the ISL9104IRUDZ-T7A?
The ISL9104IRUDZ-T7A uses a 6-pin 1.6mm × 1.6mm µTDFN package (drawing L6.1.6x1.6) with exposed thermal pad. Its typical junction-to-ambient thermal resistance (θJA) is 160°C/W on a standard test board. For sustained 500mA operation, thermal design must ensure ambient temperature stays ≤+85°C and PCB copper area under the thermal pad is maximized per layout guidelines.
ISL9104IRUDZ-T7A 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-T7A FAQ
1.How can I place an order for ISL9104IRUDZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUDZ-T7A 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-T7A reliable?
The price and inventory of ISL9104IRUDZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUDZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104IRUDZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUDZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUDZ-T7A?
ISL9104IRUDZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUDZ-T7A 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-T7A?
For technical support, including ISL9104IRUDZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUDZ-T7A requirements.
6.How does Aetrix verify that ISL9104IRUDZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUDZ-T7A 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-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104IRUDZ-T7A?
All ISL9104IRUDZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUDZ-T7A, 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-T7A part is unused and in its original packaging.
Return procedure for ISL9104IRUDZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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