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Renesas ISL9104IRUFZ-T7A
- Part No.:
- ISL9104IRUFZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUFZ-T7A.pdf
- Description:
- IC REG BUCK 2.5V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,654
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Product details
Overview
ISL9104IRUFZ-T7A from Renesas Electronics (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 integrated P/N-channel MOSFETs. It powers core logic in WCDMA handsets and portable instruments.
For engineers reviewing the ISL9104IRUFZ-T7A datasheet, ISL9104IRUFZ-T7A pinout, ISL9104IRUFZ-T7A application, or ISL9104IRUFZ-T7A equivalent, key selection criteria include light-load efficiency (20µA IQ), ultrasonic skip-mode noise suppression (not applicable to ISL9104 variant), fixed 2.5V output accuracy (±3%), thermal shutdown (130°C), and µTDFN-6 package compatibility with space-constrained PCB layouts.
Technical Context
The ISL9104IRUFZ-T7A 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 frequency under heavy load, enabling use of 1.0µH inductors and 4.7µF ceramic capacitors.
Under light load, it automatically enters skip mode (PFM) triggered by 16 consecutive zero-crossing detections at the SW node, reducing switching frequency to minimize losses. The device integrates digital soft-start, logic-controlled enable/disable with output capacitor discharge, and overcurrent/thermal/UVLO protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over temperature and line - ensures stable core voltage for 2.5V I/O domains without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum - supports moderate-power processors and baseband ICs in handheld applications. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li+ cell (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 minimal PCB footprint. |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime during standby or low-activity states. |
| Shutdown Current | 0.05µA typical - reduces system leakage when powered off, critical for always-on subsystems. |
| Duty Cycle | 100% maximum - supports ultra-low dropout (<300mV at 500mA), extending usable battery range. |
| Thermal Shutdown | 130°C threshold with 30°C hysteresis - provides robust self-protection during sustained overload or poor thermal design. |
Pinout & Package
ISL9104IRUFZ-T7A is housed in a Pb-free, RoHS-compliant 1.6mm × 1.6mm µTDFN-6 package with 0.5mm pitch and exposed thermal pad. The package occupies <0.5cm² total board area and supports reflow soldering per IPC/JEDEC J-STD-020 MSL3 profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.7–6.0V; requires local 4.7µF ceramic decoupling to GND for EMI suppression and transient stability. |
| EN (Pin 2) | Enable control input | Active-high logic interface; pulls low to disable regulator and actively discharge output capacitor via internal bleeding FET. |
| 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 2.5V output for fixed-version operation; not user-accessible for voltage adjustment. |
| GND (Pin 5) | Power ground reference | Primary return path for input/output currents; must be connected to solid ground plane for thermal and noise performance. |
| SW (Pin 6) | Switching node | Connects to inductor high-side; carries high di/dt square wave-requires short, wide trace routing away from sensitive analog nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated 0.45Ω P-MOSFET + 0.4Ω N-MOSFET - eliminates external diode, achieves up to 93% peak efficiency, and reduces BOM count. |
| Low-IQ Skip Mode | 20µA typical quiescent current - extends battery life in idle/standby states without audible switching noise (unlike ISL9104A). |
| 100% Duty-Cycle Operation | <300mV dropout at 500mA - maintains regulation down to VIN = VOUT + dropout, maximizing usable battery voltage range. |
| Digital Soft-Start | 1.0ms controlled ramp - prevents inrush current and output overshoot during power-up, protecting downstream loads. |
| Output Capacitor Discharge | Internal bleeding FET activated on EN low - safely discharges output to <1% VOUT within milliseconds, meeting system safety requirements. |
| Protection Suite | Peak current limiting, thermal shutdown (130°C), UVLO (2.5V threshold), and short-circuit protection - ensures robust field reliability. |
Applications
| WCDMA Handset Baseband Power | Portable Medical Instrument Core Supply |
|---|---|
|
Use Scenario: Powers baseband processor and RF transceiver in 3G mobile handsets operating from single Li+ battery. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 2.5V rail with fast load transient response to handle burst-mode transmission. Use Value: 4.3MHz switching enables tiny 1.0µH inductor and 4.7µF caps, reducing solution size while maintaining >90% efficiency at 300mA. |
Use Scenario: Supplies low-noise 2.5V core voltage to ADCs, microcontrollers, and sensor interfaces in handheld diagnostic tools. IC Role / Device Role / Timing Role: Main power stage with tight output accuracy (±3%) and low dropout to sustain operation as battery depletes. Use Value: 20µA skip-mode IQ extends battery life between calibrations; 100% duty cycle maintains regulation until VIN drops to ~2.8V. |
| MP3 Player Audio Codec Supply | PDA Application Processor Rail |
|
Use Scenario: Generates clean 2.5V supply for audio DAC/ADC and DSP in portable media players. IC Role / Device Role / Timing Role: High-efficiency buck converter with low ripple and fast transient recovery to prevent audio artifacts during playback bursts. Use Value: Integrated MOSFETs and 4.3MHz operation minimize EMI coupling into analog audio paths; soft-start prevents pop/click at power-on. |
Use Scenario: Provides core voltage to ARM-based application processors in palm-sized PDAs with limited PCB real estate. IC Role / Device Role / Timing Role: Compact, thermally efficient point-of-load regulator supporting dynamic voltage scaling during CPU load changes. Use Value: 1.6×1.6mm µTDFN package fits dense layouts; thermal shutdown (130°C) protects against overheating in sealed enclosures. |
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 | 2.5V fixed output, 400mA max, 3MHz switching, 17µA IQ - lower current rating and slightly lower frequency. | Best suited for lower-power MCU cores where 500mA headroom is unnecessary. | Select if BOM cost reduction is prioritized over peak current margin and higher-frequency layout benefits. |
| Analog Devices ADP2105ARMZ-2.5-R7 | 2.5V fixed output, 600mA max, 3MHz switching, 25µA IQ - higher current capability but larger 3mm×3mm MSOP package. | Ideal for designs needing extra current headroom or requiring easier thermal management. | Choose when 600mA continuous load or manual thermal pad soldering is required, accepting larger footprint. |
Compared with ISL9104IRUFZ-T7A, the TPS62231DRYR offers lower IQ but sacrifices 100mA output capacity and uses a less compact package, while the ADP2105ARMZ-2.5-R7 provides higher current and better thermal dissipation at the expense of PCB area and slightly higher quiescent consumption.
Availability
ISL9104IRUFZ-T7A is available at Aetrix Electronics and suitable for WCDMA handset power management, portable medical instrument core supplies, MP3 player audio codec rails, and PDA application processor rails requiring stable component supply across production lifecycles.
Supply support for ISL9104IRUFZ-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 is a global leader in high-performance analog and mixed-signal semiconductors, formed through the acquisition of Intersil in 2017. It serves automotive, industrial, and consumer markets with power management and signal processing solutions.
The ISL9104 series belongs to Renesas' ultra-compact, high-frequency buck regulator product line, designed specifically for space- and battery-life-constrained portable electronics including cellular handsets, PDAs, and portable instrumentation.
FAQ
What is the output voltage tolerance of the ISL9104IRUFZ-T7A over temperature and line conditions?
The ISL9104IRUFZ-T7A provides a fixed 2.5V output with ±3% accuracy across 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 ensures reliable operation for 2.5V I/O domains without external trimming components. The ISL9104IRUFZ-T7A does not require external feedback resistors due to its factory-trimmed internal reference.
Does the ISL9104IRUFZ-T7A support ultrasonic skip-mode operation to eliminate audible noise?
No, the ISL9104IRUFZ-T7A does not include ultrasonic skip-mode functionality. That feature is exclusive to the ISL9104A variant (e.g., ISL9104AIRUFZ-T), which adds frequency dithering to keep switching energy above 20kHz during light-load operation. The ISL9104IRUFZ-T7A operates in standard skip mode with variable frequency below 20kHz, but its small inductor and ceramic capacitor minimize mechanical vibration and audible artifacts in most implementations.
What is the maximum continuous output current capability of the ISL9104IRUFZ-T7A?
The ISL9104IRUFZ-T7A guarantees a minimum continuous output current of 500mA under all recommended operating conditions, including ambient temperatures from −40°C to +85°C and input voltages from 2.7V to 6.0V. This rating assumes proper PCB layout with adequate copper area for thermal dissipation and use of recommended 1.0µH inductor and 4.7µF ceramic capacitors. Peak current limit is 1.0A (typical), providing transient headroom.
How does the ISL9104IRUFZ-T7A behave when the input voltage drops near the output voltage?
When VIN approaches VOUT, the ISL9104IRUFZ-T7A enters 100% duty-cycle low-dropout mode, turning the P-channel MOSFET fully on. Dropout voltage is determined by IL × RDS(ON) (0.45Ω typ), yielding <300mV at 500mA. In this mode, regulation is maintained until VIN falls below VOUT plus dropout and inductor DCR losses. The device does not enter linear regulation-it remains a switching controller with maximum on-time assertion.
Can the ISL9104IRUFZ-T7A be used with an adjustable-output configuration?
No, the ISL9104IRUFZ-T7A is a fixed 2.5V output variant and cannot be configured for adjustable output. Its FB pin is internally connected to the 2.5V reference and is not accessible for external resistor divider feedback. For adjustable versions, select part numbers ending in "AZ" (e.g., ISL9104IRUAZ-T), which expose the FB pin and disable the internal divider to allow user-defined output voltages using external R1/R2 networks.
ISL9104IRUFZ-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):
- 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-T7A FAQ
1.How can I place an order for ISL9104IRUFZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUFZ-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 ISL9104IRUFZ-T7A reliable?
The price and inventory of ISL9104IRUFZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUFZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104IRUFZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUFZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUFZ-T7A?
ISL9104IRUFZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUFZ-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 ISL9104IRUFZ-T7A?
For technical support, including ISL9104IRUFZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUFZ-T7A requirements.
6.How does Aetrix verify that ISL9104IRUFZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUFZ-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 ISL9104IRUFZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104IRUFZ-T7A?
All ISL9104IRUFZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUFZ-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 ISL9104IRUFZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104IRUFZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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