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Renesas ISL9104IRUAZ-T7A
- Part No.:
- ISL9104IRUAZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUAZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,820
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Product details
Overview
ISL9104IRUAZ-T7A from Renesas Electronics (formerly Intersil) is a 500mA, 4.3MHz synchronous buck DC-DC converter optimized for low-voltage microprocessor power in space-constrained portable devices. It operates from 2.7V to 6.0V input, delivers adjustable output down to 0.8V via external resistor divider, and features 20µA quiescent current in skip mode for extended battery life in handheld applications such as WCDMA handsets and MP3 players.
For engineers reviewing the ISL9104IRUAZ-T7A datasheet, ISL9104IRUAZ-T7A pinout, ISL9104IRUAZ-T7A application, or ISL9104IRUAZ-T7A equivalent, key selection criteria include its 1.6×1.6mm µTDFN package, integrated P/N-channel MOSFETs with 0.45Ω/0.4Ω typical RDS(on), 100% duty-cycle capability for ultra-low dropout, and internal digital soft-start with quick-output-capacitor discharge on disable.
Technical Context
The ISL9104IRUAZ-T7A implements peak-current-mode PWM control with slope compensation for stability and fast transient response. Its architecture integrates a 0.8V bandgap reference, transconductance error amplifier, and zero-cross sensing circuit enabling automatic transition between fixed-frequency 4.3MHz PWM mode (heavy load) and ultrasonic skip mode (light load).
It embeds protection functions including overcurrent protection triggered at 0.75–1.35A peak switch current, thermal shutdown at +130°C with 30°C hysteresis, undervoltage lockout at 2.5–2.7V, and short-circuit detection via FB pin monitoring. The device supports power sequencing via logic-controlled EN pin and discharges the output capacitor through an internal bleeding FET when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500mA guaranteed minimum - supports full-load operation of low-power microprocessors and baseband ICs. |
| Switching Frequency | 4.3MHz typical - enables use of 1.0µH inductor and 4.7µF ceramic capacitors, minimizing solution footprint to <0.5cm². |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li-ion, three NiMH, or regulated 5V rails without external LDO pre-regulation. |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime during standby or light-load states in portable equipment. |
| Feedback Reference | 0.8V ±2% over temperature - sets precise output voltage via external resistor divider; enables 0.8V–3.3V adjustable range. |
| Duty Cycle | 100% maximum - achieves <300mV dropout at 500mA, extending usable battery voltage range in deep-discharge conditions. |
| Shutdown Current | <1µA typical - ensures near-zero system leakage when powered off, critical for always-on subsystems. |
Pinout & Package
ISL9104IRUAZ-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 thermal conductivity mounting and occupies minimal PCB area.
| 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 EMI suppression and transient response. |
| EN (Pin 2) | Logic-enable control input | Active-high enable; drives internal reference and soft-start when high; discharges output capacitor when low. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating per datasheet - no external tie or pull-up/down. |
| FB (Pin 4) | Feedback input for output regulation | Connects to resistor divider for adjustable output; senses 0.8V reference - determines VOUT = 0.8V × (1 + R1/R2). |
| GND (Pin 5) | Power and signal ground reference | Primary return path for input/output currents and internal circuitry; must be connected to solid ground plane. |
| SW (Pin 6) | Switching node connection | Drives external inductor; carries high di/dt switching current - requires short, wide trace routing to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Synchronous Rectification | P-Channel (0.45Ω) and N-Channel (0.4Ω) MOSFETs eliminate external diode, achieving up to 93% efficiency at 500mA. |
| Intelligent Light-Load Management | Automatic transition to skip mode below ~15mA load reduces switching loss and maintains >85% efficiency at 1mA output. |
| Digital Soft-Start | 1ms controlled ramp limits inrush current during power-up, preventing input rail sag and system reset events. |
| Output Capacitor Discharge | Internal bleeding FET actively discharges VOUT capacitor when EN is low - eliminates residual voltage for safe sequencing. |
| Robust Protection Suite | Includes peak current limiting, thermal shutdown (+130°C), UVLO (2.5V), and short-circuit detection via FB pin monitoring. |
Applications
| Mobile Phone Baseband Power | WCDMA Handset RF Front-End |
|---|---|
Use Scenario: Powers baseband processor core voltage (e.g., 1.2V or 1.5V) from single Li-ion battery in GSM/WCDMA handsets. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable, low-noise DC supply with fast load transient response to CPU DVFS transitions. Use Value: 4.3MHz switching avoids audible noise; 20µA IQ extends talk time; 100% duty cycle sustains operation down to 2.8V battery voltage. |
Use Scenario: Supplies regulated 2.5V or 2.8V to power amplifier bias circuits and RF transceiver analog blocks. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with low output ripple (<15mVpp) ensuring clean RF signal integrity. Use Value: Integrated MOSFETs reduce BOM count; small µTDFN footprint fits tight RF module layouts; quick discharge prevents latch-up during mode switching. |
| Portable Medical Instrument Core Logic | MP3 Player DSP and Codec Supply |
Use Scenario: Generates 1.8V or 3.3V for microcontroller and sensor interface in battery-powered glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Low-quiescent-current regulator supporting long shelf life and intermittent active measurement cycles. Use Value: Sub-1µA shutdown current preserves battery during multi-week storage; ±2% FB accuracy ensures reliable ADC reference stability. |
Use Scenario: Provides 1.0V–1.2V core voltage to audio DSP and 3.3V I/O supply to codec in flash-based MP3 players. IC Role / Device Role / Timing Role: Dual-rail power source with independent enable control for selective subsystem power gating. Use Value: Adjustable output allows single BOM for multiple voltage variants; 1.6×1.6mm package enables compact player designs under 50mm² PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS62231DRYR | 3MHz switching frequency, 300mA output, 17µA IQ, 2.05–6.0V input, fixed-output only (no FB pin) | Limited to fixed-output voltages; lacks adjustable feedback and output discharge function | Select when fixed 1.8V/2.5V/3.3V output suffices and board space permits slightly larger 2×2mm DRY package |
| Analog Devices ADP2119ACPZ-R7 | 3MHz frequency, 600mA output, 25µA IQ, 2.3–5.5V input, includes power-good flag and external sync capability | Requires external compensation components; no integrated output discharge; wider input range but lower max VIN | Prefer when system-level power sequencing requires PG signal or clock synchronization with other converters |
Compared with TPS62231DRYR and ADP2119ACPZ-R7, ISL9104IRUAZ-T7A offers superior light-load efficiency due to its 20µA skip-mode IQ, full adjustability via FB pin, and built-in output discharge - making it optimal for battery-sensitive, multi-voltage portable systems where layout area and sequencing control are critical.
Availability
ISL9104IRUAZ-T7A is available at Aetrix Electronics and suitable for mobile phone baseband power, WCDMA RF front-end supplies, and portable medical instrument core logic requiring stable component supply across production lifecycles.
Supply support for ISL9104IRUAZ-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 portable, automotive, and industrial markets.
The ISL9104IRUAZ-T7A belongs to Renesas' ultra-compact synchronous buck regulator product line, designed specifically for battery-powered handheld devices demanding minimal PCB area, high light-load efficiency, and robust power sequencing capabilities.
FAQ
What is the output voltage range supported by ISL9104IRUAZ-T7A?
The ISL9104IRUAZ-T7A is an adjustable-output buck converter with no internal feedback divider. Its output voltage is set externally using a resistor divider connected to the FB pin, which references a precise 0.8V internal bandgap. Using standard 1% resistors, ISL9104IRUAZ-T7A supports outputs from 0.8V (direct FB-to-VOUT connection) up to at least 3.3V, as validated in the datasheet's recommended configurations table.
Does ISL9104IRUAZ-T7A support 100% duty-cycle operation, and what is its practical benefit?
Yes, ISL9104IRUAZ-T7A supports true 100% duty-cycle operation. When input voltage approaches the output voltage, the P-channel MOSFET remains fully enhanced, eliminating switching losses and enabling regulation down to VIN – VDS(on) × ILOAD. At 500mA, this yields less than 300mV dropout, allowing ISL9104IRUAZ-T7A to sustain output voltage until the Li-ion battery discharges to ~2.8V - significantly extending usable battery capacity.
How does the quick output capacitor discharge function work in ISL9104IRUAZ-T7A?
When the EN pin is driven low, ISL9104IRUAZ-T7A disables both internal MOSFETs and activates an internal N-channel bleeding FET connected between the SW node and GND. This provides a controlled discharge path for the output capacitor through the inductor and bleeding FET, reducing VOUT to near-zero within milliseconds. This prevents residual voltage from interfering with power sequencing or causing latch-up in downstream logic.
What are the thermal limitations and protections built into ISL9104IRUAZ-T7A?
ISL9104IRUAZ-T7A incorporates thermal shutdown with a nominal trigger threshold of +130°C and 30°C hysteresis. Once junction temperature exceeds +130°C, the device halts switching and enters thermal shutdown; it automatically resumes operation only after temperature falls to ~+100°C and soft-start reinitializes. Its 1.6×1.6mm µTDFN package has a typical θJA of 160°C/W, requiring adequate copper pour and thermal vias for sustained 500mA operation above +60°C ambient.
Can ISL9104IRUAZ-T7A be synchronized to an external clock?
No, ISL9104IRUAZ-T7A does not support external clock synchronization. It operates with a fixed internal oscillator running at 4.3MHz (±15%) under PWM mode and automatically transitions to variable-frequency skip mode under light load. For designs requiring phase alignment or EMI spread-spectrum control, alternative regulators such as the Renesas ISL9123 or Analog Devices ADP2119 would be required.
ISL9104IRUAZ-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- 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)
ISL9104IRUAZ-T7A FAQ
1.How can I place an order for ISL9104IRUAZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUAZ-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 ISL9104IRUAZ-T7A reliable?
The price and inventory of ISL9104IRUAZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUAZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104IRUAZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUAZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUAZ-T7A?
ISL9104IRUAZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUAZ-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 ISL9104IRUAZ-T7A?
For technical support, including ISL9104IRUAZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUAZ-T7A requirements.
6.How does Aetrix verify that ISL9104IRUAZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUAZ-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 ISL9104IRUAZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104IRUAZ-T7A?
All ISL9104IRUAZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUAZ-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 ISL9104IRUAZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104IRUAZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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