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Renesas ISL9104AIRUWZ-T
- Part No.:
- ISL9104AIRUWZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104AIRUWZ-T.pdf
- Description:
- IC REG BUCK 1.2V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,115
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Product details
Overview
ISL9104AIRUWZ-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 a 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 low-dropout operation. It is used in WCDMA handsets and portable instruments requiring high light-load efficiency.
For engineers reviewing the ISL9104AIRUWZ-T datasheet, ISL9104AIRUWZ-T pinout, ISL9104AIRUWZ-T application, or ISL9104AIRUWZ-T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives with functional distinctions, and supply support for production ramp-up.
Technical Context
The ISL9104AIRUWZ-T implements peak-current-mode PWM control with internal slope compensation for fast transient response and cycle-by-cycle current limiting. Its 4.3MHz switching frequency enables use of a 1.0µH inductor and 4.7µF ceramic capacitors, minimizing PCB area to under 0.5 cm².
Under light load, it automatically enters ultrasonic skip mode (PFM) - unique to the ISL9104A variant - suppressing audible noise while maintaining 20µA typical quiescent current. It integrates P- and N-channel MOSFETs (0.45Ω/0.4Ω typical RDS(on) at 3.6V), supports 100% duty cycle for <300mV dropout at 500mA, and includes internal digital soft-start, output capacitor discharge, overcurrent, thermal shutdown, and UVLO protection.
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 without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum - sufficient to power ARM Cortex-M cores or baseband processors in handheld devices. |
| Input Voltage Range | 2.7V to 6.0V - supports single Li-ion (2.7–4.2V), three NiMH cells, or regulated 5V rails without external pre-regulation. |
| Switching Frequency | 4.3MHz nominal (3.6–4.9MHz over temp) - enables ultra-compact 1.0µH inductors and reduces EMI fundamental frequency above AM band. |
| Quiescent Current | 20µA typical in skip mode - extends battery runtime in standby/sleep states of portable electronics. |
| Shutdown Current | 0.05µA typical - minimizes battery drain during full system power-off. |
| Duty Cycle | 100% maximum - allows operation down to VIN = VOUT + dropout (e.g., 1.5V input for 1.2V output), maximizing usable battery range. |
| Package | 6-pin µTDFN, 1.6mm × 1.6mm - surface-mount footprint compatible with high-density mobile PCB layouts. |
Pinout & Package
ISL9104AIRUWZ-T is housed in a Pb-free, RoHS-compliant 6-pin µTDFN package (1.6mm × 1.6mm, 0.5mm height, L6.1.6x1.6 drawing). The package supports reflow per JEDEC J-STD-020 MSL3 and features exposed thermal pad for enhanced thermal performance.
| 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 GND for stability and EMI suppression. |
| EN (Pin 2) | Logic-enable control input | Active-high (≥1.4V); pulls internal discharge FET to bleed output capacitor when low - enables precise power sequencing. |
| 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 0.8V bandgap; for fixed-output variants like ISL9104AIRUWZ-T, directly connected to VOUT - no external divider needed. |
| GND (Pin 5) | Power and signal ground | Primary return path for input/output currents and IC bias; must be connected to solid ground plane beneath thermal pad. |
| 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 |
|---|---|
| Ultrasonic skip mode | Exclusive to ISL9104A family - eliminates audible coil whine (<20kHz) during light-load operation while retaining 20µA IQ. |
| Integrated power MOSFETs | P-Channel (0.45Ω typ) + N-Channel (0.4Ω typ) switches - eliminate external FETs and gate drivers, reducing BOM count and layout complexity. |
| Output capacitor discharge | Internal bleeding FET activated on EN low - discharges VOUT within milliseconds, preventing latch-up or back-powering in multi-rail systems. |
| Digital soft-start | 1.0ms controlled ramp - limits inrush current into output capacitance, avoiding input rail sag and system reset during power-up. |
| Thermal shutdown with hysteresis | 130°C trip / 100°C recovery - protects against sustained overload or poor heatsinking without oscillatory shutdown cycles. |
| Low dropout operation | 100% duty cycle enabled - sustains regulation down to VIN ≈ VOUT + IOUT×RDS(on), extending usable battery life by ~15% vs. non-100% designs. |
Applications
| Mobile Phone Power Management | WCDMA Handset Baseband Supply |
|---|---|
Use Scenario: Providing clean, regulated 1.2V core voltage to application processor or baseband SoC during active and sleep modes. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 500mA with dynamic load transient response <100µs. Use Value: 93% peak efficiency and 20µA skip-mode IQ extend talk time and standby duration without compromising RF performance. |
Use Scenario: Powering RF transceiver ICs requiring tightly regulated 1.2V with minimal noise coupling into sensitive analog front-end paths. IC Role / Device Role / Timing Role: Low-noise, ultrasonic-switching DC-DC converter with fast load step recovery to maintain TX/RX signal integrity. Use Value: Skip-mode operation avoids audible interference in earpiece/headset audio paths while sustaining >90% efficiency at 10–100mA loads. |
| Portable Instrument Core Rail | Ultra-Compact PDAs and Palmtops |
Use Scenario: Generating stable 1.2V for microcontroller or FPGA fabric in handheld test equipment with limited battery capacity. IC Role / Device Role / Timing Role: High-efficiency, thermally robust buck converter operating across -40°C to +85°C ambient range. Use Value: 160°C/W θJA and thermal shutdown ensure reliable operation in sealed enclosures without forced airflow. |
Use Scenario: Replacing linear regulators in legacy PDA designs to improve battery life while maintaining identical 1.2V output and footprint. IC Role / Device Role / Timing Role: Drop-in efficiency upgrade with same pinout and external component count as older discrete solutions. Use Value: Reduces power dissipation by >70% vs. LDO at 500mA, enabling thinner form factors and cooler user interface surfaces. |
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 | 3MHz switching frequency, 300mA rated, 18µA IQ, fixed 1.2V output, 6-pin WSON (2mm × 2mm) | Lower current capability and larger footprint; lacks ultrasonic skip mode and output discharge function | Choose if board space allows larger package and 300mA suffices; verify thermal margin at full load. |
| MP2108DQ-LF-Z | 2MHz switching, 600mA rated, 25µA IQ, adjustable/fixed options, 8-pin QFN (2mm × 2mm) | Higher pin count, no integrated output discharge, no ultrasonic PFM, wider input range (2.5–6.5V) | Prefer when higher output current or wider VIN range is required; accept trade-off in acoustic noise and sequencing capability. |
Compared with TPS62231DRYR and MP2108DQ-LF-Z, the ISL9104AIRUWZ-T uniquely combines 500mA capability, ultrasonic skip mode, output capacitor discharge, and 1.6mm × 1.6mm footprint - making it optimal for space-constrained, battery-sensitive WCDMA and smartphone subsystems where acoustic noise and power sequencing are critical.
Availability
ISL9104AIRUWZ-T is available at Aetrix Electronics and suitable for mobile phone power management, WCDMA handset baseband supply, and portable instrument core rail applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for ISL9104AIRUWZ-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 (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 ISL9104A product line was designed specifically for ultra-compact, battery-powered handheld devices requiring high-efficiency, low-noise, and intelligent power sequencing - targeting smartphones, PDAs, and portable instrumentation.
FAQ
What is the output voltage of the ISL9104AIRUWZ-T?
The ISL9104AIRUWZ-T is a fixed-output buck converter 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 for regulation.
Does the ISL9104AIRUWZ-T support ultrasonic operation?
Yes, the ISL9104AIRUWZ-T - as part of the ISL9104A family - features ultrasonic skip mode that suppresses switching frequencies below 20kHz during light-load conditions, eliminating audible coil whine while maintaining 20µA typical quiescent current.
How does the ISL9104AIRUWZ-T handle output capacitor discharge?
When the EN pin is driven low, the ISL9104AIRUWZ-T activates an internal bleeding MOSFET between VOUT and GND, discharging the output capacitor rapidly. This prevents back-powering of upstream circuitry and supports safe, controlled power-down sequencing in multi-rail systems.
What is the maximum continuous output current for the ISL9104AIRUWZ-T?
The ISL9104AIRUWZ-T guarantees a minimum continuous output current of 500mA under all operating conditions (2.7–6.0V input, -40°C to +85°C ambient). Derating may apply above 85°C ambient depending on PCB thermal design and airflow.
Can the ISL9104AIRUWZ-T operate with a single Li-ion cell?
Yes, the ISL9104AIRUWZ-T operates from 2.7V to 6.0V, fully supporting single Li-ion cells (2.7–4.2V discharge range). Its 100% duty-cycle capability allows regulation down to VIN ≈ 1.5V for 1.2V output, maximizing usable battery capacity.
ISL9104AIRUWZ-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)
ISL9104AIRUWZ-T FAQ
1.How can I place an order for ISL9104AIRUWZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104AIRUWZ-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 ISL9104AIRUWZ-T reliable?
The price and inventory of ISL9104AIRUWZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104AIRUWZ-T is usually 5 days.
3.What payment methods are accepted for ISL9104AIRUWZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104AIRUWZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104AIRUWZ-T?
ISL9104AIRUWZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104AIRUWZ-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 ISL9104AIRUWZ-T?
For technical support, including ISL9104AIRUWZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104AIRUWZ-T requirements.
6.How does Aetrix verify that ISL9104AIRUWZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9104AIRUWZ-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 ISL9104AIRUWZ-T meets industry standards.
7.What is the process for return or replacement of ISL9104AIRUWZ-T?
All ISL9104AIRUWZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104AIRUWZ-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 ISL9104AIRUWZ-T part is unused and in its original packaging.
Return procedure for ISL9104AIRUWZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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