My Inquiry
My Account
Renesas ISL9104IRUJZ-T7A
- Part No.:
- ISL9104IRUJZ-T7A
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9104IRUJZ-T7A.pdf
- Description:
- IC REG BUCK 2.8V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,370
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL9104IRUJZ-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 2.8V 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 - enabling compact Li+-powered applications like WCDMA handsets and MP3 players.
For engineers reviewing the ISL9104IRUJZ-T7A datasheet, ISL9104IRUJZ-T7A pinout, ISL9104IRUJZ-T7A application, or ISL9104IRUJZ-T7A equivalent, key selection criteria include its 2.8V fixed output, 4.3MHz switching frequency for ultra-small external components, 20µA light-load IQ, thermal shutdown at 130°C, and µTDFN-6 package compatibility with high-density PCB layouts.
Technical Context
The ISL9104IRUJZ-T7A employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its architecture integrates a 0.8V bandgap reference, transconductance error amplifier, and zero-cross sensing circuit to enable automatic transition between fixed-frequency PWM (heavy load) and ultrasonic-capable skip mode (light load).
It implements 100% duty-cycle low-dropout operation using an internal P-channel high-side switch, supports logic-controlled enable with <1µA shutdown current, and includes dedicated bleeding FET for rapid output capacitor discharge upon disable - all within a thermally enhanced 1.6×1.6mm µTDFN package with θJA = 160°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±3% over line/load/temperature - eliminates external feedback resistors and ensures stable core voltage for 2.8V I/O domains. |
| Switching Frequency | 4.3MHz (3.6–4.9MHz range) - enables use of 1.0µH inductors and 4.7µF ceramic capacitors, reducing total solution size to <0.5cm². |
| Max Output Current | 500mA guaranteed - sufficient to power ARM Cortex-M cores, baseband processors, and RF front-end ICs in handheld devices. |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime during standby/sleep states in Li+-powered equipment. |
| Duty Cycle Range | 0–100% - supports dropout operation down to VIN = VOUT + IOUT × RDS(ON)_PCH (≤300mV at 500mA), extending usable battery range. |
| Thermal Shutdown | 130°C threshold with 30°C hysteresis - provides autonomous protection against sustained overload or poor heatsinking without external circuitry. |
| Enable Threshold | Logic-high >1.4V, logic-low <0.4V - compatible with standard CMOS GPIOs for precise power sequencing in multi-rail systems. |
Pinout & Package
The ISL9104IRUJZ-T7A is housed in a RoHS-compliant, Pb-free 6-pin µTDFN package (1.6mm × 1.6mm, 0.5mm height) with exposed thermal pad. Pin 1 is marked by a dot; top-view pinout follows JEDEC MO-229 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.7–6.0V; requires local 4.7µF ceramic decoupling to minimize high-frequency noise injection into source rail. |
| EN (Pin 2) | Logic-enable control input | Active-high enable; pulls internal discharge FET when low to rapidly deplete output capacitance - critical for safe power-down sequencing. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating - not tied to GND or any other node to avoid parasitic coupling. |
| FB (Pin 4) | Feedback reference node | Internally connected to 2.8V divider output; no external components required - simplifies layout and improves regulation accuracy vs adjustable variants. |
| GND (Pin 5) | Power ground return | Primary return path for input/output currents and IC substrate; must connect directly to solid ground plane under package thermal pad. |
| SW (Pin 6) | Switching node | Drives external inductor; carries high di/dt square wave - requires short, wide trace routing away from sensitive analog nodes (e.g., FB, EN). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-channel MOSFETs | 0.45Ω/0.40Ω typical RDS(ON) at 3.6V - eliminates external power switches, reduces BOM count, and improves full-load efficiency up to 93%. |
| Digital soft-start | 1.0ms controlled ramp - prevents inrush current into output capacitors, avoiding input rail collapse and system brownouts during power-up. |
| Output capacitor bleed function | Internal N-channel discharge FET - actively drains output to <100mV within 1ms of EN deactivation, meeting fast-power-cycle requirements in mobile UIs. |
| Overcurrent & short-circuit protection | Peak current limit at 1.0A (typ) + SCP comparator monitoring FB voltage - protects against sustained overload and hard shorts without external sensing components. |
| Ultrasonic skip mode | Not implemented - ISL9104IRUJZ-T7A is non-ultrasonic variant (per Ordering Information table); skip mode operates below 20kHz but may generate audible noise. |
Applications
| Mobile Handset Power | WCDMA Baseband Supply |
|---|---|
Use Scenario: Powering application processor I/O rails and auxiliary peripherals in dual-mode WCDMA/GSM smartphones with single-cell Li+ battery. IC Role / Device Role / Timing Role: Primary 2.8V step-down regulator delivering clean, regulated voltage to memory interfaces and camera modules. Use Value: 20µA skip-mode IQ extends standby time beyond 7 days; 4.3MHz switching allows 1.0µH inductor placement adjacent to SoC, minimizing loop area and EMI. | Use Scenario: Supplying 2.8V to WCDMA transceiver baseband ASICs requiring tight voltage tolerance and fast load transient response. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with <100ns response to 100mA load steps, maintaining VDD stability during RF burst transmission. Use Value: 100% duty cycle enables operation down to 3.1V input as battery discharges, preserving RF link margin until end-of-life. |
| Portable Media Player Core | Li+-Powered Instrumentation |
Use Scenario: Generating 2.8V for audio codec, display driver, and flash memory in MP3 players with 2.7–4.2V battery input range. IC Role / Device Role / Timing Role: Compact, low-noise DC-DC source replacing linear regulators to reduce thermal load and extend playback time. Use Value: 93% peak efficiency at 300mA cuts power dissipation by >60% vs LDO; µTDFN package fits within 3mm × 3mm board area constraints. | Use Scenario: Providing stable 2.8V bias to precision ADCs, op-amps, and sensor signal chains in handheld test equipment powered by rechargeable Li+ cells. IC Role / Device Role / Timing Role: Low-ripple, low-drift power source with <3% output error across –40°C to +85°C ambient. Use Value: Internal 0.8V reference and trimmed feedback network ensure ±3% regulation without calibration - reducing production test overhead. |
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 | 3.0V fixed output, 2.0–6.0V input, 4.5MHz switching, 22µA IQ - differs in output voltage and slightly higher min input. | Suitable for 3.0V logic rails; less optimal for 2.8V I/O domains requiring tighter voltage matching. | Select if system uses 3.0V peripherals and requires TI's WEBENCH design support. |
| RT8059GJ6 | 2.8V fixed output, 2.5–5.5V input, 3.0MHz switching, 25µA IQ - lower frequency increases inductor size; wider input range improves cold-temperature startup. | Better suited for industrial temperature range (–40°C to +105°C) and applications needing extended low-VIN operation. | Choose when operating below 2.7V input or requiring extended junction temperature rating beyond +85°C. |
Compared with TPS62231DRYR and RT8059GJ6, the ISL9104IRUJZ-T7A offers superior 2.8V output accuracy (±3% vs ±4%), smaller solution footprint due to 4.3MHz operation, and faster load transient recovery - making it optimal for space- and efficiency-critical 2.8V mobile power rails.
Availability
ISL9104IRUJZ-T7A is available at Aetrix Electronics and suitable for mobile handset power, WCDMA baseband supply, portable media player core, and Li+-powered instrumentation requiring stable component supply with consistent parametric performance across production lots.
Supply support for ISL9104IRUJZ-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 (acquired Intersil in 2017) designs high-performance analog and mixed-signal semiconductors for power management, interface, and timing applications in mobile, industrial, and automotive markets.
The ISL9104 series belongs to Renesas' ultra-compact DC-DC converter product line, engineered specifically for battery-powered portable electronics demanding minimal PCB area, nanoscale quiescent current, and robust protection features in sub-2mm² packages.
FAQ
What is the output voltage of the ISL9104IRUJZ-T7A and is it adjustable?
The ISL9104IRUJZ-T7A provides a fixed 2.8V output with ±3% accuracy over line, load, and temperature. It is not adjustable - the FB pin is internally connected to the 2.8V divider, eliminating external resistors. This differs from the ISL9104IRUAZ-T (adjustable) variant, which requires external R1/R2 to set VOUT. The ISL9104IRUJZ-T7A simplifies design for 2.8V I/O rails in mobile SoCs.
Does the ISL9104IRUJZ-T7A support ultrasonic skip mode to prevent audible noise?
No, the ISL9104IRUJZ-T7A does not support ultrasonic skip mode. Per the Ordering Information table in FN6829 Rev 5.00, only ISL9104A-series parts (e.g., ISL9104AIRUJZ-T) include the "YES" ultrasonic function flag. The ISL9104IRUJZ-T7A operates in standard skip mode, which may produce audible coil whine under light loads - verify acoustic requirements in final system integration.
What is the maximum continuous output current capability of the ISL9104IRUJZ-T7A?
The ISL9104IRUJZ-T7A guarantees 500mA continuous output current across –40°C to +85°C ambient, validated per Electrical Specifications on page 4 of FN6829. Peak current limit is 1.0A (typ), but sustained operation above 500mA risks thermal shutdown unless board-level thermal management (e.g., copper pour, airflow) exceeds θJA = 160°C/W. Derate linearly above +60°C ambient.
How does the ISL9104IRUJZ-T7A handle power-down sequencing?
When the EN pin is driven low, the ISL9104IRUJZ-T7A disables both internal MOSFETs and activates an internal bleeding FET connected to the SW node, discharging the output capacitor to <100mV within 1ms. This ensures rapid, controlled power-down essential for USB OTG, camera shutter, or multi-rail SoC sequencing - no external discharge circuitry is needed.
What package type and thermal characteristics does the ISL9104IRUJZ-T7A use?
The ISL9104IRUJZ-T7A uses a 6-pin µTDFN package (1.6mm × 1.6mm, 0.5mm height) with exposed thermal pad. Its thermal resistance is θJA = 160°C/W (typical, per page 4), requiring direct connection of the pad to a solid ground plane for effective heat dissipation. Junction temperature must remain ≤125°C for reliable operation; thermal shutdown triggers at 130°C.
ISL9104IRUJZ-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):
- 2.8V
- 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)
ISL9104IRUJZ-T7A FAQ
1.How can I place an order for ISL9104IRUJZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9104IRUJZ-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 ISL9104IRUJZ-T7A reliable?
The price and inventory of ISL9104IRUJZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9104IRUJZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9104IRUJZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9104IRUJZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9104IRUJZ-T7A?
ISL9104IRUJZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9104IRUJZ-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 ISL9104IRUJZ-T7A?
For technical support, including ISL9104IRUJZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9104IRUJZ-T7A requirements.
6.How does Aetrix verify that ISL9104IRUJZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9104IRUJZ-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 ISL9104IRUJZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9104IRUJZ-T7A?
All ISL9104IRUJZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9104IRUJZ-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 ISL9104IRUJZ-T7A part is unused and in its original packaging.
Return procedure for ISL9104IRUJZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL9104IRUJZ-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…
