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Renesas ISL9104IRUWZ-T
- Part No.:
- ISL9104IRUWZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUWZ-T.pdf
- Description:
- IC REG BUCK 1.2V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,912
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Product details
Overview
ISL9104IRUWZ-T 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 1.2V output with ±3% accuracy, operates from 2.7V–6.0V input, and features 20µA quiescent current in skip mode and 100% duty-cycle operation for <300mV dropout at full load - enabling single Li⁺ cell support in mobile phones and PDAs.
For engineers reviewing the ISL9104IRUWZ-T datasheet, ISL9104IRUWZ-T pinout, ISL9104IRUWZ-T application, or ISL9104IRUWZ-T equivalent, key selection criteria include its 1.6×1.6mm µTDFN package, integrated P/N-channel MOSFETs, ultralow IQ skip mode, internal soft-start, and output capacitor discharge function during shutdown.
Technical Context
The ISL9104IRUWZ-T employs peak-current-mode PWM control with slope compensation for fast transient response and cycle-by-cycle current limiting. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output voltage via the FB pin - though for this fixed 1.2V variant, FB is internally connected to the output node.
Under light load, it autonomously enters skip mode (PFM) after detecting 16 consecutive zero-crossings at the SW node, reducing switching frequency to minimize losses; under heavy load, it reverts to fixed 4.3MHz PWM operation. The EN pin enables precise power sequencing and triggers active output capacitor discharge upon disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±3% over line, load, and temperature - ensures stable core voltage for low-power microprocessors. |
| Max Output Current | 500mA guaranteed minimum - supports moderate digital loads without external current boosting. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li⁺ (2.7–4.2V), three NiMH, or regulated 5V rails. |
| Switching Frequency | 4.3MHz typical (3.6–4.9MHz range) - enables use of 1.0µH inductor and 4.7µF ceramic capacitors for <0.5cm² solution size. |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime in standby or low-activity states. |
| Shutdown Current | <1µA logic-controlled - eliminates parasitic drain when system is powered off. |
| Duty Cycle | 100% maximum - achieves <300mV dropout at 500mA, extending usable battery voltage range. |
Pinout & Package
ISL9104IRUWZ-T is housed in a Pb-free, RoHS-compliant 6-pin 1.6mm × 1.6mm µTDFN package with wettable flanks, rated for -40°C to +85°C ambient operation and MSL3 handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Primary power input | Accepts 2.7–6.0V; requires local 4.7µF ceramic decoupling to GND for EMI suppression and transient response. |
| EN (Pin 2) | Logic enable control | Active-high; drives internal reference and soft-start when ≥1.4V; discharges output capacitor when pulled low. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating - no external tie or pull-up/down. |
| FB (Pin 4) | Feedback reference node | Internally tied to output for fixed 1.2V version; not user-configurable - bypass resistor divider required only for adjustable variants. |
| GND (Pin 5) | Power and signal ground | Common return path for VIN, SW, and internal circuits; must connect to solid ground plane with minimal impedance. |
| SW (Pin 6) | Switching node | Connects to inductor high-side; carries high di/dt pulses - requires short, wide trace routing away from noise-sensitive nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-channel MOSFETs | 0.45Ω/0.40Ω typical RDS(on) at 3.6V - eliminates external FETs and reduces BOM count while maintaining >93% peak efficiency. |
| Internal digital soft-start | 1.0ms typical ramp time - prevents inrush current and output overshoot during power-up sequences. |
| Output capacitor discharge | Active bleed path via internal N-MOSFET - discharges VOUT to <100mV within milliseconds of EN deactivation for safe downstream sequencing. |
| Thermal shutdown with hysteresis | 130°C trip with 30°C hysteresis - protects against sustained overload or poor PCB thermal design without nuisance cycling. |
| Overcurrent and short-circuit protection | Peak current limit of 1.0A (min) and SCP comparator monitoring FB voltage - prevents damage during output faults or startup into shorted loads. |
Applications
| Mobile Phone Core Power | WCDMA Handset RF Bias |
|---|---|
Use Scenario: Powering application processor cores in slim smartphones operating from single-cell Li⁺ batteries. IC Role / Device Role / Timing Role: Primary step-down regulator delivering tightly regulated 1.2V at up to 500mA with dynamic load response. Use Value: 4.3MHz switching and 20µA skip-mode IQ extend talk-time by minimizing light-load losses across varying CPU activity states. | Use Scenario: Supplying bias voltage to power amplifiers and transceivers in 3G WCDMA handsets. IC Role / Device Role / Timing Role: Low-noise, fast-transient point-of-load regulator supporting RF subsystem stability during burst transmission. Use Value: 100% duty-cycle operation maintains regulation down to ~1.5V input, preserving RF performance as battery voltage declines. |
| PDA System-on-Chip Rail | Portable Instrument Digital Logic |
Use Scenario: Generating core voltage for ARM-based SoCs in handheld PDAs with tight board area constraints. IC Role / Device Role / Timing Role: Compact, integrated buck converter replacing discrete solutions to meet space and efficiency targets. Use Value: 1.6×1.6mm µTDFN package and minimal external components (<0.5cm² total footprint) enable ultra-thin form factors. | Use Scenario: Powering FPGA configuration logic, ADC drivers, and microcontroller peripherals in portable test equipment. IC Role / Device Role / Timing Role: Stable, low-ripple 1.2V supply with fast load-step recovery for mixed-signal integrity. Use Value: Peak-current-mode control and internal compensation deliver <50µs recovery from 100mA load steps, reducing output deviation to <25mV. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.2V output, 4MHz switching, 300mA rating, 17µA IQ in PFM - lower current capability and smaller package (1.2×1.2mm). | Suitable for lower-power SoCs or sensors where 500mA headroom is unnecessary. | Select when board area is more critical than output current margin and thermal derating is acceptable. |
| RT8059GJ6 | Fixed 1.2V output, 3MHz switching, 600mA rating, 22µA IQ in skip mode - higher current but slower frequency increases inductor size. | Better for systems requiring >500mA peak or needing slightly lower EMI due to reduced switching frequency. | Choose when future-proofing for higher load growth or when 3MHz allows use of lower-cost inductors. |
Compared with TPS62231DRYR and RT8059GJ6, the ISL9104IRUWZ-T offers optimal balance of 500mA capability, 4.3MHz frequency for miniaturization, and proven 20µA skip-mode IQ - making it ideal for space-constrained, battery-life-sensitive designs where full 500mA delivery is routinely required.
Availability
ISL9104IRUWZ-T is available at Aetrix Electronics and suitable for mobile phone core power, WCDMA handset RF bias, PDA SoC rails, and portable instrument digital logic requiring stable component supply across high-mix, low-to-medium volume production.
Supply support for ISL9104IRUWZ-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 is a global leader in high-performance analog and power management semiconductors, formed through the acquisition of Intersil in 2017.
The ISL9104IRUWZ-T belongs to Renesas' legacy Intersil buck converter portfolio, designed specifically for ultra-compact, battery-powered consumer electronics demanding high efficiency at light loads and robust transient response.
FAQ
What is the output voltage of the ISL9104IRUWZ-T?
The ISL9104IRUWZ-T is a fixed-output variant delivering 1.2V with ±3% accuracy over line, load, and temperature. This value is factory-trimmed and does not require external feedback resistors - the FB pin is internally connected to the output node per the datasheet ordering table.
Does the ISL9104IRUWZ-T support automatic power sequencing?
Yes, the ISL9104IRUWZ-T supports controlled power sequencing via its EN pin. When driven high (≥1.4V), it initiates internal reference wake-up followed by 1.0ms digital soft-start. When pulled low, it disables both power switches and actively discharges the output capacitor - enabling safe, coordinated turn-off with other system rails.
What package type and dimensions does the ISL9104IRUWZ-T use?
The ISL9104IRUWZ-T uses a Pb-free, RoHS-compliant 6-pin µTDFN package measuring 1.6mm × 1.6mm with 0.5mm pitch. It features wettable flanks for automated optical inspection and is rated for -40°C to +85°C ambient operation per the FN6829 datasheet.
How does the ISL9104IRUWZ-T manage efficiency at light loads?
The ISL9104IRUWZ-T achieves high light-load efficiency by automatically entering skip mode (PFM) when output current drops below ~10mA. In this mode, switching frequency decreases dynamically, reducing gate drive and switching losses - resulting in just 20µA typical quiescent current and >85% efficiency at 1mA load.
Is the ISL9104IRUWZ-T pin-compatible with other members of the ISL9104 family?
Yes, all ISL9104 and ISL9104A variants - including ISL9104IRUWZ-T, ISL9104IRUCZ-T, and ISL9104AIRUWZ-T - share identical 6-pin µTDFN pinout and footprint. However, fixed-output versions differ in FB connection (internal vs. external divider), and ISL9104A variants add ultrasonic skip mode - so functional compatibility requires verification of voltage setting and feature requirements.
ISL9104IRUWZ-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):
- 1.2V
- 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)
ISL9104IRUWZ-T FAQ
1.How can I place an order for ISL9104IRUWZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUWZ-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 ISL9104IRUWZ-T reliable?
The price and inventory of ISL9104IRUWZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUWZ-T is usually 5 days.
3.What payment methods are accepted for ISL9104IRUWZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUWZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUWZ-T?
ISL9104IRUWZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUWZ-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 ISL9104IRUWZ-T?
For technical support, including ISL9104IRUWZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUWZ-T requirements.
6.How does Aetrix verify that ISL9104IRUWZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUWZ-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 ISL9104IRUWZ-T meets industry standards.
7.What is the process for return or replacement of ISL9104IRUWZ-T?
All ISL9104IRUWZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUWZ-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 ISL9104IRUWZ-T part is unused and in its original packaging.
Return procedure for ISL9104IRUWZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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