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Renesas ISL9104IRUCZ-T7A
- Part No.:
- ISL9104IRUCZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUCZ-T7A.pdf
- Description:
- IC REG BUCK 1.8V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
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Product details
Overview
ISL9104IRUCZ-T7A from Renesas (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 1.8V 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 is used in WCDMA handsets and mobile phones requiring high light-load efficiency and ultracompact footprint.
For engineers reviewing the ISL9104IRUCZ-T7A datasheet, ISL9104IRUCZ-T7A pinout, ISL9104IRUCZ-T7A application, or ISL9104IRUCZ-T7A equivalent, key selection criteria include fixed 1.8V output accuracy (±3%), 4.3MHz PWM switching frequency enabling sub-1mm² solution size, thermal shutdown at 130°C, and logic-controlled shutdown current <1µA - all validated for -40°C to +85°C industrial operation.
Technical Context
The ISL9104IRUCZ-T7A employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its 4.3MHz fixed-frequency operation under heavy load minimizes external passive size, while automatic transition to skip mode (PFM) at light load reduces switching loss using zero-cross detection over 16 consecutive cycles.
It integrates low-RDS(on) P-channel (0.45Ω typ @ 3.6V) and N-channel (0.4Ω typ @ 3.6V) MOSFETs, supports 100% duty-cycle low-dropout regulation, and includes internal digital soft-start, output capacitor discharge on disable, and overcurrent/short-circuit/thermal protection - all within a 1.6×1.6mm µTDFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±3% over line, load, and temperature - ensures stable core voltage for 1.8V I/O or processor domains without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum - sufficient to power baseband processors or RF transceivers in cellular handsets. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li-ion (2.7–4.2V), three NiMH cells, or regulated 5V rails. |
| Quiescent Current | 20µA typical in skip mode - extends battery runtime in standby or low-activity states of portable equipment. |
| Switching Frequency | 4.3MHz ±0.7MHz - enables use of 1.0µH inductors and 4.7µF ceramic capacitors, reducing total solution area to <0.5cm². |
| Duty Cycle | 100% maximum - achieves <300mV dropout at 500mA, maximizing usable battery voltage range before brownout. |
| Shutdown Current | <1µA - minimizes system-level leakage when powered off, critical for always-on subsystems. |
Pinout & Package
ISL9104IRUCZ-T7A is housed in a RoHS-compliant, Pb-free 6-pin 1.6mm × 1.6mm µTDFN package with exposed thermal pad (Package Drawing L6.1.6x1.6). The package supports high-density PCB layouts and efficient thermal dissipation (θJA = 160°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6.0V supply; requires local 4.7µF ceramic decoupling to GND for EMI suppression and transient response. |
| EN (Pin 2) | Enable control | Active-high logic input; pulls low to disable regulator and actively discharge output capacitor via internal bleeding FET. |
| NC (Pin 3) | No connect | Internally unconnected; must be left floating - no external tie required or recommended. |
| FB (Pin 4) | Feedback reference | Internally tied to 1.8V output for fixed-version operation; not accessible for adjustment - eliminates external resistor divider. |
| GND (Pin 5) | Power ground | Primary return path for input/output currents; must be connected to solid ground plane adjacent to VIN and SW pins. |
| SW (Pin 6) | Switching node | Connects to inductor 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 | Eliminates external Schottky diode, reducing BOM count and improving full-load efficiency up to 93%. |
| Ultrasonic skip mode (PFM) | Switching frequency drops below 20kHz only in ISL9104A variants - ISL9104IRUCZ-T7A uses standard skip mode without ultrasonic guarantee. |
| Internal digital soft-start | 1.0ms controlled ramp limits inrush current during power-up, preventing input rail collapse in battery-fed systems. |
| Output capacitor quick-bleed | Discharges VOUT to <100mV within 1ms after EN deactivation - meets safety and sequencing requirements in multi-rail systems. |
| Thermal shutdown with hysteresis | Shuts down at 130°C junction temperature and resumes at ~100°C - prevents thermal runaway during sustained overload or poor heatsinking. |
Applications
| Mobile Phone Baseband Power | WCDMA Transceiver Bias |
|---|---|
|
Use Scenario: Powering ARM-based baseband processors in dual-mode GSM/WCDMA handsets with single-cell Li-ion battery input. IC Role / Device Role / Timing Role: Primary 1.8V core supply regulator delivering up to 500mA with tight output accuracy and fast load transient response. Use Value: Enables reliable operation across full battery voltage range (2.7–4.2V) while maintaining >90% efficiency at 200mA and extending talk time via 20µA skip-mode IQ. |
Use Scenario: Providing clean, low-noise 1.8V bias to RF front-end ICs and power amplifiers in WCDMA handsets. IC Role / Device Role / Timing Role: Point-of-load (POL) regulator with low output ripple (<15mVpp) and fast transient recovery (<10µs) to prevent RF desense. Use Value: Integrated MOSFETs and 4.3MHz switching minimize EMI coupling into sensitive RF paths, while 100% duty cycle sustains operation down to 2.1V input. |
| Portable Medical Sensor Hub | Ultra-Compact MP3 Player SoC Supply |
|
Use Scenario: Powering low-power microcontrollers and analog sensor interfaces in wearable ECG or glucose monitors. IC Role / Device Role / Timing Role: Always-on 1.8V supply with <1µA shutdown current and rapid wake-up from disable state. Use Value: Sub-1mm² total footprint (including 1µH inductor and two 4.7µF caps) fits inside slim form factors; 20µA IQ preserves battery life over multi-week monitoring periods. |
Use Scenario: Generating 1.8V for audio codec and flash memory interface in palm-sized MP3 players. IC Role / Device Role / Timing Role: High-efficiency step-down regulator supporting burst-mode playback with dynamic load current from 1mA to 500mA. Use Value: Automatic PWM-to-skip mode transition maintains >85% efficiency across entire load range, eliminating need for external mode control logic. |
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 1.8V output, 400mA max, 3.5MHz switching, 17µA IQ in PFM - lower current rating and slightly lower frequency. | Suitable for lower-power MCU cores but insufficient for 500mA RF loads; smaller 1.2×1.2mm DRY package. | Select if board space is more constrained than current requirement and thermal margin allows derating. |
| Analog Devices ADP2105ARMZ-1.8-R7 | Fixed 1.8V output, 600mA max, 3MHz switching, 25µA IQ in PFM - higher current, lower frequency, different enable polarity (active-low). | Better suited for thermally demanding environments due to higher current headroom and lower θJA (140°C/W). | Select when 600mA capability or lower thermal resistance is prioritized over 4.3MHz size advantage. |
Compared with TPS62231DRYR and ADP2105ARMZ-1.8-R7, the ISL9104IRUCZ-T7A offers the highest switching frequency for smallest passive size, precise 500mA delivery at 1.8V, and integrated quick-bleed functionality - making it optimal for ultra-dense, battery-sensitive handheld designs where 4.3MHz operation is acceptable.
Availability
ISL9104IRUCZ-T7A is available at Aetrix Electronics and suitable for mobile phone baseband power, WCDMA transceiver bias, and portable medical sensor hub applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9104IRUCZ-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 (formerly Intersil) is a global leader in high-performance analog and mixed-signal semiconductors, specializing in power management and precision analog solutions for mobile, industrial, and automotive markets.
The ISL9104IRUCZ-T7A belongs to Renesas' ISL9104 family of ultra-small, high-frequency synchronous buck regulators designed specifically for battery-powered portable electronics requiring minimal PCB area and maximum light-load efficiency.
FAQ
What is the output voltage tolerance of the ISL9104IRUCZ-T7A over temperature and line conditions?
The ISL9104IRUCZ-T7A provides ±3% output voltage accuracy over the full operating temperature range (-40°C to +85°C) and input voltage range (2.7V to 6.0V). This specification applies to the fixed 1.8V version and is guaranteed by design - no external feedback components are used or required, ensuring consistent regulation without resistor tolerance drift.
Does the ISL9104IRUCZ-T7A support ultrasonic skip mode to avoid audible noise?
No, the ISL9104IRUCZ-T7A does not support ultrasonic skip mode. That feature is exclusive to the ISL9104A variant (e.g., ISL9104AIRUCZ-T), which guarantees skip-mode operation above 20kHz. The ISL9104IRUCZ-T7A uses standard pulse-skipping mode and may produce audible noise under light-load conditions.
What is the maximum continuous output current the ISL9104IRUCZ-T7A can deliver reliably?
The ISL9104IRUCZ-T7A guarantees a minimum continuous output current of 500mA across its full operating temperature and input voltage range. This rating assumes proper PCB layout with adequate copper pour for thermal dissipation and use of recommended external components (1.0µH inductor, 4.7µF input/output capacitors).
How does the ISL9104IRUCZ-T7A handle output capacitor discharge when disabled?
When the EN pin is pulled low, the ISL9104IRUCZ-T7A activates an internal N-channel bleeding MOSFET (RDS(on) ≈ 100Ω) between the SW node and GND, discharging the output capacitor rapidly. This ensures VOUT falls to <100mV within 1ms, meeting strict power sequencing and safety requirements in multi-rail systems.
Is the ISL9104IRUCZ-T7A pin-compatible with other members of the ISL9104 family?
Yes, all ISL9104 and ISL9104A variants - including ISL9104IRUCZ-T7A - share identical 6-pin 1.6×1.6mm µTDFN packaging and pinout (VIN, EN, NC, FB, GND, SW). Fixed-output and adjustable versions differ only in internal FB network configuration, allowing direct substitution in layouts where output voltage matches.
ISL9104IRUCZ-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):
- 1.8V
- 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)
ISL9104IRUCZ-T7A FAQ
1.How can I place an order for ISL9104IRUCZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUCZ-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 ISL9104IRUCZ-T7A reliable?
The price and inventory of ISL9104IRUCZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUCZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104IRUCZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUCZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUCZ-T7A?
ISL9104IRUCZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUCZ-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 ISL9104IRUCZ-T7A?
For technical support, including ISL9104IRUCZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUCZ-T7A requirements.
6.How does Aetrix verify that ISL9104IRUCZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUCZ-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 ISL9104IRUCZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104IRUCZ-T7A?
All ISL9104IRUCZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUCZ-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 ISL9104IRUCZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104IRUCZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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