My Inquiry
My Account
Renesas ISL9103IRUWZ-T
- Part No.:
- ISL9103IRUWZ-T
- Manufacturer:
- Renesas
- Package:
- 6-UFDFN
- Datasheet:
-
ISL9103IRUWZ-T.pdf
- Description:
- IC REG BUCK 1.2V 500MA 6UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,671
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL9103IRUWZ-T from Intersil is a 500mA, 2.4MHz synchronous buck converter optimized for low-voltage microprocessor power in compact battery-powered devices. It delivers fixed 1.2V output from 2.7–6.0V input, features 20µA quiescent current in skip mode, 100% duty-cycle operation for <300mV dropout at 500mA, and integrates P- and N-channel MOSFETs. It is used in WCDMA handsets and portable instruments requiring high light-load efficiency.
For engineers reviewing the ISL9103IRUWZ-T datasheet, ISL9103IRUWZ-T pinout, ISL9103IRUWZ-T application, or ISL9103IRUWZ-T equivalent, key selection criteria include fixed 1.2V output accuracy (±3%), ultralow IQ skip mode, thermal shutdown at 130°C, and compatibility with single Li+ cell input (2.7–6.0V).
Technical Context
The ISL9103IRUWZ-T employs peak-current-mode PWM control with internal slope compensation for fast transient response and cycle-by-cycle current limiting. Its oscillator operates at 2.4MHz (1.9–2.75MHz range) under heavy load and automatically transitions to pulse-skipping (PFM) mode under light load to maintain high efficiency.
It integrates matched P- and N-channel MOSFETs (RDS(on) ≤ 0.72Ω / ≤ 0.65Ω at 2.7V), supports 100% duty-cycle low-dropout operation, and includes digital soft-start (1.2ms), quick-output-capacitor discharge via internal bleeding FET, and overtemperature protection with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±3% over temperature and line - ensures stable core voltage for low-power microprocessors without external feedback resistors. |
| Input Voltage Range | 2.7V to 6.0V - supports direct connection to single Li+ cell, three NiMH cells, or regulated 5V rail. |
| Max Output Current | 500mA guaranteed - sufficient for powering ARM Cortex-M cores or baseband processors in handheld devices. |
| Switching Frequency | 2.4MHz typical (1.9–2.75MHz) - enables use of small 2.2µH inductor and 10µF ceramic capacitors, minimizing PCB area (<0.5cm² total solution). |
| Quiescent Current | 20µA typical in skip mode - maximizes battery runtime during standby or low-activity states in portable electronics. |
| Duty Cycle | 100% maximum - achieves <300mV dropout at 500mA, extending usable battery life down to near-end-of-discharge voltages. |
| Thermal Shutdown | 130°C threshold with 30°C hysteresis - provides robust protection during sustained high-load or poor-thermal-layout conditions. |
Pinout & Package
ISL9103IRUWZ-T is housed in a Pb-free, RoHS-compliant 6-pin 1.6mm × 1.6mm µTDFN package (PKG DWG # L6.1.6x1.6), with exposed thermal pad for enhanced heat dissipation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–6.0V supply; requires local 10µF ceramic decoupling capacitor to minimize input ripple and high-frequency noise. |
| EN (Pin 2) | Logic enable | Active-high control: drives high to enable regulation and soft-start; drives low to disable converter and actively discharge output capacitor via internal bleeding FET. |
| NC (Pin 3) | No-connect | Internally unconnected; must be left floating - no external tie or pull-up/down required. |
| FB (Pin 4) | Feedback reference | Internally tied to 0.8V bandgap reference for fixed 1.2V output; not user-accessible in this variant - eliminates need for external resistor divider. |
| GND (Pin 5) | Power ground | Primary return path for input/output currents and IC bias; must be connected to solid ground plane adjacent to VIN and SW pins for EMI control. |
| SW (Pin 6) | Switch node | Connects to inductor's high-side terminal; carries high di/dt switching current - requires short, wide trace and careful layout to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous MOSFETs | P- and N-channel switches with RDS(on) ≤ 0.72Ω/0.65Ω reduce conduction loss and eliminate external FETs and drivers. |
| 100% duty-cycle operation | Enables dropout voltage <300mV at full 500mA load, preserving system operation as battery voltage declines. |
| Digital soft-start | 1.2ms controlled ramp prevents inrush current and output overshoot during power-up sequencing. |
| Quick output discharge | Internal bleeding FET discharges output capacitor when EN is low - critical for safe power-down in multi-rail systems. |
| Peak current limiting & SCP | Hardware-based OCP triggers immediate P-FET turn-off; SCP reduces oscillator frequency during output short to prevent thermal runaway. |
Applications
| Mobile Handset Power | Portable Instrument Core Supply |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver in WCDMA handsets operating from single Li+ cell. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.2V core voltage with dynamic load handling up to 500mA. Use Value: 20µA skip-mode IQ extends talk time; 2.4MHz switching minimizes passive component footprint in tight RF layout zones. |
Use Scenario: Supplying logic core of handheld multimeter or data logger with intermittent active/sleep cycles. IC Role / Device Role / Timing Role: Efficient DC-DC conversion from 3.7V battery to 1.2V microcontroller VDD, supporting rapid wake-from-sleep transitions. Use Value: 100% duty-cycle operation sustains regulation down to 1.5V input, maximizing usable battery capacity before shutdown. |
| PDA System-on-Chip Rail | MP3 Player DSP Core |
Use Scenario: Generating 1.2V supply for ARM9-based PDA application processor with bursty memory access loads. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter managing transient current spikes during cache flushes or LCD updates. Use Value: Peak-current-mode control ensures <5% output deviation during 100mA–500mA load steps; thermal shutdown protects against enclosure overheating. |
Use Scenario: Powering audio DSP core in flash-based MP3 player with variable computational load and long idle periods. IC Role / Device Role / Timing Role: Low-noise, low-IQ regulator maintaining precise 1.2V rail during decode vs. standby modes. Use Value: Ultralow 20µA quiescent current in skip mode directly increases battery life by >15% versus standard PWM-only converters. |
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 | Fixed 1.2V output, 300mA rating, 3.6MHz switching, 17µA IQ - lower current capability and higher fSW, but smaller 1.2×1.2mm DSBGA package. | Suitable for ultra-compact wearables with <300mA peak load; lacks quick discharge and 100% duty cycle. | Select if board space is more constrained than current requirement and output discharge is handled externally. |
| RT8059GJ6 | Fixed 1.2V output, 500mA rating, 1.5MHz switching, 25µA IQ - lower fSW requires larger inductor/capacitor, no integrated bleeding FET. | Better suited for cost-sensitive industrial sensors where 2.4MHz EMI is problematic and discharge timing is non-critical. | Choose when lower switching frequency eases EMI filtering and thermal design outweighs footprint savings. |
Compared with TPS62231DRYR and RT8059GJ6, the ISL9103IRUWZ-T uniquely combines 500mA capability, 2.4MHz operation, 100% duty cycle, and active output discharge - making it optimal for space-limited, battery-critical handhelds requiring robust power sequencing.
Availability
ISL9103IRUWZ-T is available at Aetrix Electronics and suitable for mobile handset power, portable instrument core supply, PDA SoC rails, MP3 player DSP cores, and other applications requiring stable component supply with high light-load efficiency and compact footprint.
Supply support for ISL9103IRUWZ-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 (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-efficiency DC-DC solutions targeting portable and battery-powered systems.
The ISL9103 series was designed specifically for low-voltage, high-efficiency point-of-load regulation in compact consumer electronics - emphasizing minimal quiescent current, small solution size, and seamless power sequencing.
FAQ
What is the output voltage of the ISL9103IRUWZ-T and how is it set?
The ISL9103IRUWZ-T provides a fixed 1.2V output voltage. This value is factory-trimmed and internally configured - the FB pin is pre-connected to an internal 0.8V reference and resistor network, eliminating the need for external feedback components. Output accuracy is guaranteed at ±3% over temperature and line conditions, as specified in the Electrical Specifications table on page 3 of FN6828.2.
Does the ISL9103IRUWZ-T support 100% duty-cycle operation and what is its practical benefit?
Yes, the ISL9103IRUWZ-T supports 100% duty-cycle operation, enabling dropout voltage below 300mV at 500mA load. This allows the device to maintain regulation as the input voltage falls - for example, extending usable runtime from a single Li+ cell down to ~1.5V input. The benefit is maximized battery utilization without requiring a separate LDO post-regulator stage.
How does the ISL9103IRUWZ-T manage efficiency at light loads?
The ISL9103IRUWZ-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 while maintaining regulation, significantly improving light-load efficiency - critical for extending standby time in portable devices powered by Li+ batteries.
What protection features are integrated into the ISL9103IRUWZ-T?
The ISL9103IRUWZ-T integrates overcurrent protection (OCP) with peak-current limiting, short-circuit protection (SCP) that throttles switching frequency during output faults, thermal shutdown at 130°C with 30°C hysteresis, undervoltage lockout (UVLO) at 2.5V, and internal digital soft-start. It also includes a dedicated bleeding FET that discharges the output capacitor when the EN pin is pulled low.
Is the ISL9103IRUWZ-T pin-compatible with other variants in the ISL9103 family?
Yes, all ISL9103 and ISL9103A variants - including ISL9103IRUWZ-T - share identical 6-pin 1.6mm × 1.6mm µTDFN packaging and pinout (VIN, EN, NC, FB, GND, SW). Fixed-output versions differ only in internal feedback configuration; adjustable versions require external resistors on FB. No PCB layout changes are needed when substituting within the same package variant.
ISL9103IRUWZ-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):
- 1.2V
- 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)
ISL9103IRUWZ-T FAQ
1.How can I place an order for ISL9103IRUWZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9103IRUWZ-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 ISL9103IRUWZ-T reliable?
The price and inventory of ISL9103IRUWZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9103IRUWZ-T is usually 5 days.
3.What payment methods are accepted for ISL9103IRUWZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9103IRUWZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9103IRUWZ-T?
ISL9103IRUWZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9103IRUWZ-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 ISL9103IRUWZ-T?
For technical support, including ISL9103IRUWZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9103IRUWZ-T requirements.
6.How does Aetrix verify that ISL9103IRUWZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9103IRUWZ-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 ISL9103IRUWZ-T meets industry standards.
7.What is the process for return or replacement of ISL9103IRUWZ-T?
All ISL9103IRUWZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9103IRUWZ-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 ISL9103IRUWZ-T part is unused and in its original packaging.
Return procedure for ISL9103IRUWZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL9103IRUWZ-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…
