My Inquiry
My Account
Renesas ISL9103IRUFZ-T
- Part No.:
- ISL9103IRUFZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9103IRUFZ-T.pdf
- Description:
- IC REG BUCK 2.5V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,175
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL9103IRUFZ-T from Intersil is a 500mA, 2.4MHz synchronous buck converter optimized for low-voltage microprocessors in compact battery-powered devices. It delivers a fixed 2.5V output with ±3% accuracy, operates from 2.7V–6.0V input, achieves up to 95% efficiency, and features 20µA quiescent current in skip mode-enabling extended battery life in mobile phones and WCDMA handsets.
For engineers reviewing the ISL9103IRUFZ-T datasheet, ISL9103IRUFZ-T pinout, ISL9103IRUFZ-T application, or ISL9103IRUFZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed fixed-output performance, and real-world selection guidance for Li+-powered portable systems requiring high light-load efficiency and ultrasmall footprint.
Technical Context
The ISL9103IRUFZ-T implements peak-current-mode PWM control with internal P-Channel (0.45Ω typ) and N-Channel (0.4Ω typ) MOSFETs, enabling fast transient response and pulse-by-pulse current limiting. Its 2.4MHz switching frequency supports 2.2µH inductors and 10µF ceramic capacitors, minimizing PCB area.
Under light load, it enters skip mode (PFM) with ultrasonic operation (no audible noise), reducing switching loss while maintaining regulation via zero-cross detection over 16 cycles. At heavy load, it transitions seamlessly to fixed-frequency PWM mode with 100% duty-cycle capability for dropout voltages under 300mV at 500mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over temperature and line-ensures stable core voltage for 2.5V logic rails without external feedback resistors. |
| Max Output Current | 500mA guaranteed minimum-supports power delivery to baseband processors and RF ICs in handheld devices. |
| Input Voltage Range | 2.7V to 6.0V-compatible with single Li+ cell (2.7–4.2V), three NiMH cells, or regulated 5V supplies. |
| Switching Frequency | 2.4MHz typical (1.9–2.75MHz)-enables use of sub-3mm inductors and reduces EMI filtering requirements. |
| Quiescent Current | 20µA typical in skip mode-maximizes standby time in always-on subsystems like touch controllers or sensors. |
| Duty Cycle | 100% maximum-allows operation down to VIN = VOUT + dropout (≤300mV @ 500mA), extending battery runtime near end-of-discharge. |
| Shutdown Current | <1µA logic-controlled-prevents battery drain during deep sleep or system off states. |
Pinout & Package
ISL9103IRUFZ-T is housed in a Pb-free, RoHS-compliant 6-pin 1.6mm × 1.6mm µTDFN package (PKG DWG # L6.1.6x1.6), occupying less than 0.5cm² total board area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2.7–6.0V; requires 10µF ceramic decoupling capacitor to GND for stability and EMI suppression. |
| EN (Pin 2) | Enable control input | Active-high logic interface; 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; no external tie required. |
| FB (Pin 4) | Feedback node | Internally tied to fixed 2.5V output divider-no external resistor network needed for this variant. |
| GND (Pin 5) | Power ground reference | Primary return path for input/output currents; must be connected to solid ground plane for thermal and EMI performance. |
| SW (Pin 6) | Switching node | Connects to inductor's high-side terminal; carries high di/dt pulses-requires short, wide trace routing away from sensitive analog nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous FETs | P-Channel (0.45Ω) + N-Channel (0.4Ω) MOSFETs eliminate external power switches and reduce BOM count by two components. |
| Digital soft-start | 1.2ms controlled ramp-up prevents inrush current and output overshoot during power-on sequencing. |
| Quick output discharge | Internal bleeding MOSFET actively discharges output capacitor when EN is low-ensures safe reset and prevents back-powering. |
| Thermal shutdown | 130°C trip point with 30°C hysteresis-protects against sustained overload or poor heatsinking without latch-up. |
| Overcurrent protection | Peak current limit of 0.95A (typ) with cycle-by-cycle limiting-prevents damage during short-circuit or startup faults. |
Applications
| Mobile Phone Power Rail | WCDMA Transceiver Bias |
|---|---|
Use Scenario: Supplying 2.5V to baseband processor I/O and memory interfaces in dual-mode GSM/WCDMA handsets. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 2.5V from single Li+ battery with dynamic load handling up to 500mA. Use Value: 20µA skip-mode IQ extends talk time by >15% versus comparable converters; 2.4MHz switching avoids interference with cellular bands. |
Use Scenario: Providing clean, low-noise 2.5V bias to RF front-end ICs in WCDMA handsets operating across 2.1GHz bands. IC Role / Device Role / Timing Role: Fixed-output buck converter powering transceiver analog sections where ripple and transient response directly impact EVM. Use Value: 95% peak efficiency and <10mVpp output ripple (with 10µF X5R output cap) maintain signal integrity and reduce thermal load on RF modules. |
| Portable Instrument Core Logic | PDA Application Processor |
Use Scenario: Generating 2.5V for FPGA configuration logic and sensor interface circuitry in handheld test equipment. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC source supporting intermittent high-current bursts during measurement cycles. Use Value: 100% duty-cycle operation sustains regulation down to 2.8V input-extending usable battery range beyond 3.0V cutoff. |
Use Scenario: Powering ARM-based application processors in PDAs with bursty workloads and aggressive sleep modes. IC Role / Device Role / Timing Role: High-efficiency buck converter enabling rapid transition between active (PWM) and ultra-low-power (skip) modes. Use Value: Seamless mode switching eliminates output voltage glitches during state changes-preserving system stability without external supervision. |
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 | 2.5V fixed output, 300mA rating, 3.6MHz switching, 17µA IQ-smaller current capability and higher fSW. | Suitable for lower-power SoCs; insufficient for 500mA peak loads in WCDMA transceivers. | Select only if load current remains ≤300mA and board space allows tighter layout for 3.6MHz operation. |
| RT8059NGQW | 2.5V fixed output, 600mA rating, 2.5MHz switching, 25µA IQ-higher current headroom but 25% higher quiescent current. | Better for bursty 500mA+ loads; trade-off is reduced standby time in always-on sensor nodes. | Prefer when peak current margin is critical and light-load battery life is secondary to transient robustness. |
Compared with TPS62231DRYR and RT8059NGQW, the ISL9103IRUFZ-T uniquely balances 500mA capability, 20µA skip-mode IQ, and 2.4MHz operation in a 1.6×1.6mm footprint-making it optimal for space-constrained, battery-sensitive designs where both peak and standby performance matter.
Availability
ISL9103IRUFZ-T is available at Aetrix Electronics and suitable for mobile phone power rails, WCDMA transceiver bias, and portable instrument core logic requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9103IRUFZ-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
Intersil Corporation is a U.S.-based semiconductor company specializing in precision analog and power management ICs, acquired by Renesas Electronics in 2017.
The ISL9103 series was designed specifically for ultra-compact, battery-powered portable electronics-emphasizing minimal footprint, high light-load efficiency, and seamless mode transitions for extended runtime in handheld devices.
FAQ
What is the output voltage tolerance of the ISL9103IRUFZ-T over temperature and line?
The ISL9103IRUFZ-T provides a fixed 2.5V output with ±3% accuracy across the full operating temperature range (−40°C to +85°C) and input voltage range (2.7V to 6.0V). This specification is guaranteed in PWM mode and applies to line and load regulation per the FN6828.2 datasheet, ensuring reliable operation in varying battery states and ambient conditions for the ISL9103IRUFZ-T.
Does the ISL9103IRUFZ-T require external feedback resistors to set its output voltage?
No-the ISL9103IRUFZ-T is a fixed-output variant configured for 2.5V. Its FB pin is internally connected to a precision voltage divider, eliminating the need for external R1/R2 resistors. This simplifies design, improves accuracy, and reduces component count compared to adjustable versions of the ISL9103 family.
How does the ISL9103IRUFZ-T manage efficiency at very light loads?
The ISL9103IRUFZ-T automatically enters skip mode (PFM) under light loads, reducing switching frequency and achieving a typical quiescent current of 20µA. This mode minimizes switching losses and maximizes battery life in standby or idle states-critical for always-on functions in mobile devices powered by the ISL9103IRUFZ-T.
What protection features are integrated into the ISL9103IRUFZ-T?
The ISL9103IRUFZ-T integrates overcurrent protection (0.95A peak limit), thermal shutdown (130°C trip with 30°C hysteresis), undervoltage lockout (2.5V rising threshold), and logic-controlled shutdown (<1µA). It also includes a quick output discharge function that actively bleeds the output capacitor when disabled-enhancing system safety and reset reliability for the ISL9103IRUFZ-T.
Can the ISL9103IRUFZ-T operate with a single Li+ cell across its full discharge curve?
Yes-the ISL9103IRUFZ-T supports input voltages from 2.7V to 6.0V and features 100% duty-cycle operation, allowing it to maintain regulation down to VIN ≈ VOUT + dropout (≤300mV at 500mA). This enables continuous operation from a fully charged Li+ cell (4.2V) through end-of-discharge (~2.8V), maximizing usable battery capacity for the ISL9103IRUFZ-T.
ISL9103IRUFZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 6-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UTDFN (1.6x1.6)
ISL9103IRUFZ-T FAQ
1.How can I place an order for ISL9103IRUFZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9103IRUFZ-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 ISL9103IRUFZ-T reliable?
The price and inventory of ISL9103IRUFZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9103IRUFZ-T is usually 5 days.
3.What payment methods are accepted for ISL9103IRUFZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9103IRUFZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9103IRUFZ-T?
ISL9103IRUFZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9103IRUFZ-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 ISL9103IRUFZ-T?
For technical support, including ISL9103IRUFZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9103IRUFZ-T requirements.
6.How does Aetrix verify that ISL9103IRUFZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9103IRUFZ-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 ISL9103IRUFZ-T meets industry standards.
7.What is the process for return or replacement of ISL9103IRUFZ-T?
All ISL9103IRUFZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9103IRUFZ-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 ISL9103IRUFZ-T part is unused and in its original packaging.
Return procedure for ISL9103IRUFZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL9103IRUFZ-T 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…
