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Renesas ISL9104IRUFZ-T
- Part No.:
- ISL9104IRUFZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUFZ-T.pdf
- Description:
- IC REG BUCK 2.5V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,800
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Product details
Overview
ISL9104IRUFZ-T from Renesas (formerly Intersil) is a 500mA, 4.3MHz synchronous buck DC-DC converter optimized for low-voltage microprocessor power in compact battery-powered devices. It delivers fixed 2.5V 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 - enabling high-efficiency, space-constrained designs such as WCDMA handsets and portable instruments.
For engineers reviewing the ISL9104IRUFZ-T datasheet, ISL9104IRUFZ-T pinout, ISL9104IRUFZ-T application, or ISL9104IRUFZ-T equivalent, key selection criteria include its fixed 2.5V output, ultralow IQ skip-mode operation, integrated MOSFETs with 0.45Ω/0.4Ω typical RDS(on), thermal shutdown at 130°C, and compatibility with single Li+ cell input - all critical for battery life and PCB area optimization in mobile embedded systems.
Technical Context
The ISL9104IRUFZ-T employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its oscillator operates at a fixed 4.3MHz (3.6–4.9MHz over temperature), enabling use of 1.0µH inductors and 4.7µF ceramic capacitors to minimize solution size.
Under light load, it automatically enters skip mode (PFM) after detecting 16 consecutive zero-crossing cycles at the SW node, reducing switching frequency and achieving 20µA typical quiescent current. During disable, the internal bleeding FET discharges the output capacitor via a 100Ω path, ensuring controlled shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over line/load/temperature - eliminates external feedback resistors and ensures stable core voltage for 2.5V I/O or analog subsystems. |
| Max Output Current | 500mA guaranteed minimum - supports moderate-power microcontrollers, RF transceivers, or sensor hubs without external current boosting. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li+ (2.7–4.2V), three NiMH cells, or regulated 5V rails. |
| Switching Frequency | 4.3MHz typical (3.6–4.9MHz range) - enables ultra-compact 1.0µH inductor and 4.7µF ceramic capacitors, reducing total solution area to <0.5cm². |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime in standby or low-activity states of portable equipment. |
| Duty Cycle | 100% maximum - supports ultra-low dropout (<300mV at 500mA), extending usable battery range down to ~2.8V input for 2.5V output. |
| Thermal Shutdown | 130°C threshold with 30°C hysteresis - protects against sustained overload or poor PCB thermal design while enabling automatic recovery at 100°C. |
Pinout & Package
ISL9104IRUFZ-T is housed in a RoHS-compliant, Pb-free 6-pin 1.6mm × 1.6mm µTDFN package (PKG DWG # L6.1.6x1.6) with exposed thermal pad. The package footprint occupies minimal PCB area and supports efficient heat dissipation via the GND-connected pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input power supply connection | Accepts 2.7–6.0V; requires local 4.7µF ceramic decoupling to minimize high-frequency noise injection into source rail. |
| EN (Pin 2) | Logic-enable control input | Active-high enable (1.4–6.0V logic high); pulls FB to GND and activates internal discharge FET when low, ensuring rapid, controlled VOUT collapse. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating - no external tie required or recommended. |
| FB (Pin 4) | Feedback reference node | Internally tied to 2.5V output for fixed-version operation; not user-accessible - eliminates external resistor divider and associated accuracy drift. |
| GND (Pin 5) | Power and signal ground reference | Primary return path for input/output currents and IC bias; must be connected to solid ground plane adjacent to VIN and SW traces. |
| SW (Pin 6) | Switching node connection | Drives external inductor; carries high di/dt square wave - requires short, wide trace routing away from sensitive analog nodes like FB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-MOSFETs | P-channel RDS(on) = 0.45Ω typ @ 3.6V, N-channel RDS(on) = 0.4Ω typ @ 3.6V - eliminates external power switches, reduces BOM count, and improves efficiency over discrete solutions. |
| Digital Soft-Start | 1.0ms typical ramp time - prevents inrush current during power-up, avoiding input rail droop and protecting upstream regulators or battery protection circuits. |
| Output Capacitor Bleed Function | Internal 100Ω discharge path activated on EN low - discharges output capacitance within milliseconds, meeting safety and sequencing requirements in multi-rail systems. |
| Peak Current Limit Protection | 0.75–1.35A programmable limit (typ 1.0A at 4.2V) - provides cycle-by-cycle overcurrent protection without external sensing components. |
| Ultralow Shutdown Current | <1µA logic-controlled shutdown - preserves battery charge during extended storage or deep-sleep modes in always-on portable devices. |
Applications
| Mobile Handset Power | Portable Instrument Core Supply |
|---|---|
|
Use Scenario: Powering baseband processor I/O banks and auxiliary analog circuitry in WCDMA handsets using single Li+ battery. IC Role / Device Role / Timing Role: Primary 2.5V synchronous buck regulator delivering regulated, low-noise power with fast load transient response. Use Value: 4.3MHz switching avoids audible noise; 20µA skip-mode IQ extends talk-time by >15% versus lower-frequency alternatives under intermittent load profiles. |
Use Scenario: Supplying precision ADC/DAC reference and microcontroller core in handheld test meters with tight battery life targets. IC Role / Device Role / Timing Role: Fixed-output step-down regulator providing stable 2.5V rail with <3% accuracy across -40°C to +85°C ambient. Use Value: Integrated MOSFETs and 100% duty cycle reduce dropout to <300mV, allowing full system operation down to 2.8V battery voltage. |
| MP3 Player Audio Codec Supply | PDA Application Processor Rail |
|
Use Scenario: Generating clean 2.5V supply for audio codec and headphone amplifier in flash-based MP3 players. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter operating in skip mode during music playback pause or menu navigation. Use Value: Ultrasonic skip mode (no audible coil whine) combined with 93% peak efficiency minimizes thermal rise and preserves battery for >20hr playback. |
Use Scenario: Powering ARM-based application processors in PDAs requiring fast dynamic voltage scaling between active/idle states. IC Role / Device Role / Timing Role: Compact, high-frequency buck regulator supporting rapid enable/disable sequencing with internal soft-start and bleed function. Use Value: 1.6×1.6mm µTDFN package and <0.5cm² total solution size enable integration into space-constrained PDA mainboards without compromising thermal performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | Fixed 2.5V output, 4MHz switching, 300mA rated (vs 500mA), 17µA IQ in PFM mode, 2mm × 2mm DSBGA package. | Lower output current capability limits use in higher-load processor cores; smaller package increases thermal resistance (θJA = 220°C/W vs 160°C/W). | Select when board area is more critical than current headroom and thermal margin, and when 300mA peak load is sufficient. |
| RT8059ZSP | Fixed 2.5V output, 3MHz switching, 600mA rated, 25µA IQ in skip mode, 1.6mm × 1.6mm QFN-6 package with same footprint but different pinout (EN/FB swapped). | Higher current rating supports heavier loads; pinout mismatch requires PCB redesign; lacks internal bleed function. | Select when >500mA headroom is needed and layout revision is acceptable; verify EN/FB routing and add external bleed if required. |
Compared with TPS62231DRYT and RT8059ZSP, the ISL9104IRUFZ-T offers superior thermal performance (160°C/W θJA), guaranteed 500mA output, and integrated output discharge - making it optimal for thermally constrained, battery-sensitive designs where reliability and sequencing control are prioritized over minimal footprint or marginal current increase.
Availability
ISL9104IRUFZ-T is available at Aetrix Electronics and suitable for mobile handset power, portable instrument core supply, MP3 player audio codec supply, and PDA application processor rail applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9104IRUFZ-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 high-performance analog and mixed-signal semiconductors, specializing in power management and interface solutions for mobile, industrial, and automotive markets.
The ISL9104IRUFZ-T belongs to Renesas' ultra-compact, high-frequency synchronous buck converter family designed specifically for space- and battery-constrained portable electronics - emphasizing low IQ, small solution size, and robust protection features.
FAQ
What is the output voltage of the ISL9104IRUFZ-T?
The ISL9104IRUFZ-T is a fixed-output variant delivering 2.5V ±3% over line, load, and temperature (-40°C to +85°C). Unlike adjustable versions, it does not require external feedback resistors - the FB pin is internally connected to the regulated 2.5V rail, simplifying design and improving accuracy stability.
Does the ISL9104IRUFZ-T support 100% duty-cycle operation?
Yes, the ISL9104IRUFZ-T supports 100% duty-cycle operation to minimize dropout voltage. At 500mA load, this results in less than 300mV dropout - enabling continued regulation as input voltage declines, such as during Li+ battery discharge from 3.4V down to ~2.8V while maintaining 2.5V output.
How does the ISL9104IRUFZ-T manage efficiency at light load?
The ISL9104IRUFZ-T automatically transitions from fixed-frequency PWM mode to skip mode (PFM) under light load. In skip mode, it achieves 20µA typical quiescent current by reducing switching frequency and disabling unnecessary circuitry - significantly extending battery life in standby or intermittent-use portable applications.
What protection features are integrated into the ISL9104IRUFZ-T?
The ISL9104IRUFZ-T integrates peak current limiting, overtemperature shutdown (130°C with 30°C hysteresis), undervoltage lockout (2.5V rising threshold), and logic-controlled shutdown with output capacitor bleed. These functions operate autonomously without external components, enhancing system reliability in unattended portable devices.
Is the ISL9104IRUFZ-T pin-compatible with other variants in the ISL9104 family?
Yes, all ISL9104 and ISL9104A variants - including ISL9104IRUFZ-T, ISL9104IRUNZ-T, and ISL9104AIRUFZ-T - share identical 6-pin 1.6×1.6mm µTDFN packaging and pinout. This allows drop-in replacement across output voltages (1.2V–3.3V) and ultrasonic/no-ultrasonic variants, provided EN logic and thermal constraints are verified.
ISL9104IRUFZ-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):
- 2.5V
- 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)
ISL9104IRUFZ-T FAQ
1.How can I place an order for ISL9104IRUFZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUFZ-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 ISL9104IRUFZ-T reliable?
The price and inventory of ISL9104IRUFZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUFZ-T is usually 5 days.
3.What payment methods are accepted for ISL9104IRUFZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUFZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUFZ-T?
ISL9104IRUFZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUFZ-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 ISL9104IRUFZ-T?
For technical support, including ISL9104IRUFZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUFZ-T requirements.
6.How does Aetrix verify that ISL9104IRUFZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUFZ-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 ISL9104IRUFZ-T meets industry standards.
7.What is the process for return or replacement of ISL9104IRUFZ-T?
All ISL9104IRUFZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUFZ-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 ISL9104IRUFZ-T part is unused and in its original packaging.
Return procedure for ISL9104IRUFZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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