My Inquiry
My Account
Renesas ISL9104IRUNZ-T7A
- Part No.:
- ISL9104IRUNZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUNZ-T7A.pdf
- Description:
- IC REG BUCK 3.3V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL9104IRUNZ-T7A from Renesas (formerly Intersil) is a 500mA, 4.3MHz synchronous buck converter optimized for low-voltage microprocessor power in compact battery-powered devices. It delivers fixed 3.3V 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 ISL9104IRUNZ-T7A datasheet, ISL9104IRUNZ-T7A pinout, ISL9104IRUNZ-T7A application, or ISL9104IRUNZ-T7A equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives with functional distinctions, and supply-chain support for production deployment.
Technical Context
The ISL9104IRUNZ-T7A implements 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 under heavy load and automatically transitions to ultrasonic-frequency skip mode (PFM) under light load to minimize switching loss.
It integrates matched P-Channel (0.45Ω typ @ 3.6V) and N-Channel (0.4Ω typ @ 3.6V) MOSFETs, supports 100% duty-cycle low-dropout operation, and includes zero-cross sensing for skip-mode entry after 16 consecutive cycles, plus internal digital soft-start and active output capacitor discharge on disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 500mA - supports full-core operation in single-Li+ mobile SoCs without derating. |
| Switching Frequency | 4.3MHz (typ) - enables use of 1.0µH inductor and 4.7µF ceramic caps, reducing solution size to <0.5cm². |
| Quiescent Current | 20µA (typ) in skip mode - extends battery runtime in standby states of portable instrumentation. |
| Input Voltage Range | 2.7V to 6.0V - compatible with single Li-ion, three NiMH, or regulated 5V rails without external LDO. |
| Output Voltage | Fixed 3.3V ±3% - eliminates external feedback resistors and simplifies layout for I/O rail generation. |
| Duty Cycle Max | 100% - ensures regulation down to VIN − VOUT < 300mV at 500mA, maximizing usable battery voltage range. |
| Shutdown Current | <1µA - enables true system-level power gating with negligible leakage during deep sleep. |
Pinout & Package
ISL9104IRUNZ-T7A is housed in a RoHS-compliant 6-pin 1.6mm × 1.6mm µTDFN package with wettable flanks, optimized for thermal performance (θJA = 160°C/W) and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6.0V; requires local 4.7µF ceramic decoupling to suppress high-frequency switching noise. |
| EN (Pin 2) | Enable control | Active-high logic input; asserts soft-start on rising edge and activates internal bleed FET to discharge VOUT on falling edge. |
| NC (Pin 3) | No-connect | Internally unconnected; must be left floating per datasheet - no tie to GND or VIN. |
| FB (Pin 4) | Feedback reference | Internally tied to 3.3V output for fixed version; not user-accessible - bypassed in this variant. |
| GND (Pin 5) | Power ground | Primary return path for high di/dt switch currents; must connect directly to solid ground plane under IC. |
| SW (Pin 6) | Switch node | Connects to inductor high-side terminal; carries discontinuous current with fast edges - keep trace short and away from sensitive nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-MOSFETs | 0.45Ω/0.4Ω ON-resistance pair - eliminates external power switches and reduces BOM count by two active components. |
| Ultrasonic skip mode | Operates >20kHz in light-load PFM - prevents audible coil whine in handheld audio-sensitive applications like MP3 players. |
| Internal digital soft-start | 1.0ms controlled ramp - limits inrush current to protect input source and prevent brownout during power-up sequencing. |
| Output capacitor discharge | Active bleed via internal N-FET - discharges VOUT within milliseconds of EN deactivation, meeting fast-power-down safety requirements. |
| Thermal shutdown | 130°C trip with 30°C hysteresis - autonomously recovers at 100°C, enabling robust operation in sealed portable enclosures. |
Applications
| WCDMA Handset Power Management | Portable Medical Instrumentation |
|---|---|
Use Scenario: Supplying 3.3V I/O and interface circuitry in space-constrained 3G cellular handsets powered by single Li-ion cells. IC Role / Device Role / Timing Role: Primary step-down regulator converting battery voltage to stable 3.3V rail for baseband processor peripherals and RF front-end control logic. Use Value: 4.3MHz switching allows ultra-compact 1.0µH/4.7µF filter, while 20µA IQ extends talk time between charges without sacrificing transient response. |
Use Scenario: Providing clean, low-noise 3.3V power to ADC reference circuits and sensor signal chains in handheld diagnostic tools. IC Role / Device Role / Timing Role: Low-ripple, fast-transient buck converter powering precision analog subsystems requiring stable voltage under dynamic load steps. Use Value: Integrated MOSFETs and 100% duty cycle enable uninterrupted operation down to 3.6V battery voltage, preserving measurement accuracy during battery depletion. |
| Industrial Handheld Terminals | Ultra-Compact PDAs |
Use Scenario: Delivering regulated 3.3V to ARM Cortex-M based controllers and display drivers in ruggedized warehouse scanners. IC Role / Device Role / Timing Role: Main system regulator managing power sequencing via EN pin and supporting rapid wake-from-sleep transitions. Use Value: Active output discharge ensures safe reset behavior during hot-swap battery replacement, while thermal shutdown protects against enclosure overheating. |
Use Scenario: Generating 3.3V core voltage for flash memory interfaces and touch controller ICs in sub-100g palmtop devices. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter occupying minimal PCB area (<0.5cm² total solution) to maximize battery volume. Use Value: Fixed 3.3V output eliminates external resistor network, reducing component count and improving long-term voltage stability over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3.0V fixed output, 2.05MHz switching, 22µA IQ, 300mA rated - lower current, lower frequency, different output voltage. | Suitable for lower-power MCU I/O rails where 3.0V is acceptable and board area is less constrained. | Select if 3.0V matches system rail requirements and 300mA load ceiling is sufficient; verify thermal margin at 4.3MHz-equivalent layout density. |
| RT8059NGSP | Adjustable output (0.6–5.5V), 3MHz switching, 25µA IQ, 600mA rated - higher current, adjustable, no ultrasonic skip mode. | Better for systems needing flexible voltage scaling or higher load headroom, but may generate audible noise under light load. | Choose when output voltage flexibility or 600mA headroom is required; avoid in audio-sensitive designs due to non-ultrasonic PFM. |
Compared with TPS62231DRVR and RT8059NGSP, ISL9104IRUNZ-T7A uniquely combines fixed 3.3V output, 4.3MHz operation for minimal footprint, ultrasonic skip mode, and guaranteed 500mA delivery - making it optimal for space- and noise-critical 3.3V rail generation in portable Li+-powered devices.
Availability
ISL9104IRUNZ-T7A is available at Aetrix Electronics and suitable for WCDMA handset power management, portable medical instrumentation, industrial handheld terminals, and ultra-compact PDAs requiring stable component supply across extended production lifecycles.
Supply support for ISL9104IRUNZ-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 (acquired Intersil in 2017) designs high-performance analog and power management ICs for mobile, industrial, and automotive markets, with ISO9001-certified manufacturing and broad portfolio support.
The ISL9104 series was developed specifically for ultra-compact, battery-optimized DC-DC conversion in handheld consumer electronics - emphasizing minimal solution size, ultralow IQ, and seamless power sequencing.
FAQ
What is the output voltage of ISL9104IRUNZ-T7A and is it adjustable?
The ISL9104IRUNZ-T7A provides a factory-trimmed fixed 3.3V output with ±3% accuracy over line, load, and temperature. It is not adjustable - the FB pin is internally connected to the output, eliminating external resistor dividers and simplifying layout. This differs from the ISL9104IRUAZ-T (adjustable) variant, which requires external R1/R2 feedback network.
Does ISL9104IRUNZ-T7A support ultrasonic skip mode to prevent audible noise?
Yes, ISL9104IRUNZ-T7A supports ultrasonic skip mode (PFM) operation - its switching frequency drops below audible range (>20kHz) under light load, preventing coil whine in noise-sensitive applications like MP3 players and handheld medical devices. This feature is confirmed in the ISL9104A family specification and applies to all ISL9104IRUNZ-T7A units per ordering information.
What is the maximum continuous output current capability of ISL9104IRUNZ-T7A?
ISL9104IRUNZ-T7A guarantees 500mA continuous output current across the full operating temperature range (−40°C to +85°C) and input voltage range (2.7V to 6.0V). This rating is validated by internal MOSFET ON-resistance (0.45Ω P-ch / 0.4Ω N-ch typ), thermal design (θJA = 160°C/W), and peak current limit (1.0A min).
How does the enable (EN) pin function on ISL9104IRUNZ-T7A?
The EN pin on ISL9104IRUNZ-T7A is an active-high logic input that controls startup sequencing and safe shutdown. When pulled high, it initiates internal reference wake-up and digital soft-start (1.0ms ramp). When pulled low, it disables both internal MOSFETs and activates an internal bleeding FET to rapidly discharge the output capacitor - critical for system-level power-down compliance.
What package type and thermal characteristics does ISL9104IRUNZ-T7A use?
ISL9104IRUNZ-T7A uses a 6-pin 1.6mm × 1.6mm µTDFN package with exposed thermal pad (L6.1.6x1.6 drawing). Its typical junction-to-ambient thermal resistance (θJA) is 160°C/W when mounted on a high-conductivity test board, and it incorporates thermal shutdown at 130°C (30°C hysteresis) to protect against sustained overload or poor heatsinking.
ISL9104IRUNZ-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):
- 3.3V
- 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)
ISL9104IRUNZ-T7A FAQ
1.How can I place an order for ISL9104IRUNZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUNZ-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 ISL9104IRUNZ-T7A reliable?
The price and inventory of ISL9104IRUNZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUNZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104IRUNZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUNZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUNZ-T7A?
ISL9104IRUNZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUNZ-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 ISL9104IRUNZ-T7A?
For technical support, including ISL9104IRUNZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUNZ-T7A requirements.
6.How does Aetrix verify that ISL9104IRUNZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUNZ-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 ISL9104IRUNZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104IRUNZ-T7A?
All ISL9104IRUNZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUNZ-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 ISL9104IRUNZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104IRUNZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL9104IRUNZ-T7A Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
