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Renesas ISL85003FRZ-T7AR5194
- Part No.:
- ISL85003FRZ-T7AR5194
- Manufacturer:
- Renesas
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
ISL85003FRZ-T7AR5194.pdf
- Description:
- IC REG BUCK ADJ 3A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,742
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Product details
Overview
ISL85003FRZ-T7AR5194 from Renesas Electronics is a synchronous buck DC/DC regulator integrating 65mΩ high-side and 45mΩ low-side N-channel MOSFETs, delivering up to 3A continuous output current from 4.5V–18V input while maintaining ±1% output regulation accuracy down to 0.8V. It operates in DCM/CCM auto-mode for light-load efficiency and supports external frequency synchronization up to 2MHz - ideal for point-of-load conversion in industrial embedded systems.
For engineers reviewing the ISL85003FRZ-T7AR5194 datasheet, ISL85003FRZ-T7AR5194 pinout, ISL85003FRZ-T7AR5194 application, or ISL85003FRZ-T7AR5194 equivalent, key selection considerations include its 500kHz nominal switching frequency, integrated boot diode with undervoltage detection, open-drain power-good (PG) window comparator, thermal shutdown at 165°C, and 12-lead 3mm×4mm DFN package with exposed thermal pad.
Technical Context
The ISL85003FRZ-T7AR5194 implements current-mode control with internal slope compensation (550mV/µs at 500kHz), enabling stable loop response across wide VIN/VOUT ranges. Its DCM/CCM transition is managed by zero-crossing detection and negative current limiting, ensuring seamless mode switching without output voltage disturbance.
It features an internally generated 5V VDD LDO (4.3–5.5V, 50mA limit) powered from VIN, a 4µA soft-start current source (default 2ms ramp), and programmable overvoltage protection (19–20V VIN threshold with 1V hysteresis). The device includes integrated fault protection: positive/negative overcurrent (4.0–6.0A / –3.2 to –1.1A), output overvoltage, thermal shutdown (165°C rising, 10°C hysteresis), and input UVLO (4.20–4.35V rising).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 18V - supports standard 5V, 12V, and 15V rails with margin for transients. |
| Output Current | 3A continuous - sufficient for FPGA core, microcontroller, or ASIC point-of-load applications. |
| Output Voltage Accuracy | ±1% over line/load/temperature - ensures tight regulation for sensitive digital loads. |
| Switching Frequency | 500kHz nominal, 300kHz–2MHz sync-capable - balances efficiency, size, and EMI performance. |
| High-Side rDS(ON) | 65mΩ at 100mA - minimizes conduction loss in high-side FET during CCM operation. |
| Low-Side rDS(ON) | 45mΩ at 100mA - reduces conduction loss and improves light-load DCM efficiency. |
| Thermal Shutdown | 165°C with 10°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
ISL85003FRZ-T7AR5194 is housed in a RoHS-compliant 12-lead 3mm×4mm Dual Flat No-Lead (DFN) package with exposed thermal pad (PKG DWG L12.3x4), optimized for high-power density and thermal dissipation via multiple vias to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC | Synchronization & mode selection | Connect to AGND for DCM, VDD for forced CCM, or external clock (300kHz–2MHz) - enables system-level timing coordination. |
| PG | Power-good open-drain output | Asserts high after 1.5ms when VOUT reaches 85% of target - used for sequencing and fault indication. |
| EN | Enable control input | Active-high enable with 0.6V threshold and 100mV hysteresis - supports simple logic-level or resistor-divider control. |
| FB | Feedback node | Connects to resistor divider for output voltage setting down to 0.8V reference - defines regulation setpoint with ±1% tolerance. |
| COMP | Compensation node | Internal compensation selected by shorting to AGND; external network enables custom loop tuning - simplifies or optimizes transient response. |
| PHASE (7,8) | Switch node | Drives external output inductor - carries high di/dt switching current; requires low-inductance layout. |
| VIN (9,10) | Main power input | Accepts 4.5V–18V; decoupled with 10µF ceramic capacitor near pins - critical for input ripple suppression. |
| VDD | Internal LDO output | 5V supply for analog/digital blocks; connect 1µF capacitor to AGND - bypasses noise on internal bias rail. |
| BOOT | Bootstrap supply | Connects 0.1µF capacitor to PHASE - provides gate drive voltage for high-side MOSFET. |
| AGND | Analog ground reference | Return path for error amplifier and control circuitry - must tie to clean ground plane, not shared with PGND traces. |
| PGND (EPAD) | Power ground & thermal pad | Source connection for low-side FET and primary thermal path - requires ≥8 vias to inner ground layers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual N-FETs | 65mΩ high-side + 45mΩ low-side MOSFETs eliminate external switch selection and reduce BOM count. |
| DCM/CCM auto-mode | Zero-crossing detection enables seamless light-load efficiency improvement without control-loop reconfiguration. |
| External sync capability | 300kHz–2MHz synchronization range allows noise-sensitive systems to avoid critical EMI bands. |
| Programmable soft-start | 2ms default ramp time (adjustable via SS capacitor) prevents inrush current and stabilizes startup sequence. |
| Comprehensive fault protection | Includes positive/negative OCP, VIN OV/UV, thermal shutdown, and output OVP - reduces need for external monitoring circuits. |
Applications
| Industrial Process Control | Network Equipment |
|---|---|
Use Scenario: Powering PLC I/O modules and sensor interface circuitry in factory automation cabinets with 12V or 24V backplanes. IC Role / Device Role / Timing Role: Point-of-load regulator converting 12V rail to 3.3V/1.8V for microcontrollers and ADCs. Use Value: ±1% regulation and thermal shutdown ensure reliable operation in unventilated enclosures up to +70°C ambient. | Use Scenario: Supplying 5V/3A to Ethernet PHYs and packet buffer memory in enterprise switches and routers. IC Role / Device Role / Timing Role: Primary DC/DC converter for data-path ICs requiring low-noise, fast-transient response. Use Value: 500kHz fixed frequency and external sync support enable deterministic EMI filtering and system-level clock alignment. |
| Multifunction Printers | Embedded Computing |
Use Scenario: Delivering regulated 1.2V/3A to SoC cores and 3.3V/2A to image sensor interfaces in compact MFP designs. IC Role / Device Role / Timing Role: High-density buck regulator supporting dynamic load steps during print engine activation. Use Value: DCM/CCM auto-mode maintains >85% efficiency at 100mA idle current while delivering full 3A peak loads. | Use Scenario: Providing 0.8V–5V adjustable output to ARM-based SBCs and edge AI accelerators in fanless embedded systems. IC Role / Device Role / Timing Role: Flexible POL regulator with external feedback resistors enabling multi-rail configuration. Use Value: 3mm×4mm DFN footprint and integrated FETs reduce board area by >40% vs discrete controller+FET solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 3A, 4.5–28V input, 500kHz fixed freq, no sync input, 10-pin MSOP | Lacks external sync and DCM/CCM auto-mode; lower thermal performance (θJA = 70°C/W) | Choose for cost-sensitive, non-synchronized designs where board space allows larger package. |
| TPS54332DR | 3A, 3.5–28V input, 1MHz fixed freq, no DCM mode, SOIC-8 with exposed pad | No light-load efficiency optimization; higher quiescent current (120µA vs 4.5mA) | Prefer for high-frequency, low-output-capacitance applications where 1MHz switching reduces inductor size. |
Compared with MP2315DJ-LF-Z and TPS54332DR, ISL85003FRZ-T7AR5194 delivers superior light-load efficiency via DCM/CCM auto-mode, tighter output accuracy (±1% vs ±2%), and smaller 3mm×4mm DFN footprint - making it optimal for thermally constrained, high-reliability embedded systems.
Availability
ISL85003FRZ-T7AR5194 is available at Aetrix Electronics and suitable for industrial process control, network equipment, multifunction printers, and embedded computing applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL85003FRZ-T7AR5194 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 is a global semiconductor leader specializing in microcontrollers, analog, power management, and connectivity solutions for automotive, industrial, and IoT markets.
The ISL85003 family is designed for high-efficiency, space-constrained point-of-load regulation in industrial and communications infrastructure, emphasizing thermal robustness, precision regulation, and flexible system integration.
FAQ
What is the recommended input capacitor for ISL85003FRZ-T7AR5194?
A 10µF X5R/X7R ceramic capacitor placed close to the VIN pins (9 and 10) is recommended per the datasheet. This value suppresses high-frequency switching noise and supports stable operation under 3A load transients. For systems with high input impedance or long trace lengths, adding a bulk 47µF tantalum or polymer capacitor upstream improves low-frequency ripple handling without affecting control loop stability.
Does ISL85003FRZ-T7AR5194 support adjustable output voltage below 1V?
Yes, ISL85003FRZ-T7AR5194 supports output voltages down to 0.8V using an external resistor divider connected to the FB pin. The internal 0.8V reference has ±1% tolerance across temperature, enabling accurate low-voltage regulation for modern SoCs and FPGAs. The FB pin leakage current is only 0.3–10nA, minimizing divider error.
How does the SYNC pin function on ISL85003FRZ-T7AR5194?
The SYNC pin on ISL85003FRZ-T7AR5194 serves three modes: grounded for DCM operation, tied to VDD for forced CCM, or driven by an external clock (300kHz–2MHz) for synchronization. An internal 1MΩ pull-up prevents floating states. Unlike ISL85003A, this variant uses SYNC instead of SS, confirming its identity as the frequency-sync version of the family.
What thermal derating applies to ISL85003FRZ-T7AR5194 at 85°C ambient?
At 85°C ambient with standard 2-layer PCB layout (2oz copper, 4 thermal vias), ISL85003FRZ-T7AR5194 delivers ~2.4A continuous due to θJA = 49°C/W. Full 3A operation requires ≥8 thermal vias to inner ground planes and ≥1in² copper pour under the EPAD. Thermal shutdown activates at 165°C junction, providing safety margin before silicon degradation.
Can ISL85003FRZ-T7AR5194 be used with external compensation?
Yes, ISL85003FRZ-T7AR5194 supports both internal and external compensation. Internal compensation is enabled by connecting COMP to AGND. External compensation uses a Type II or III network between COMP and FB, allowing loop bandwidth adjustment up to ~40kHz for improved transient response in high-capacitance (>200µF) output configurations.
ISL85003FRZ-T7AR5194 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 12-VFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 3A
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (3x4)
ISL85003FRZ-T7AR5194 FAQ
1.How can I place an order for ISL85003FRZ-T7AR5194 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85003FRZ-T7AR5194 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 ISL85003FRZ-T7AR5194 reliable?
The price and inventory of ISL85003FRZ-T7AR5194 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85003FRZ-T7AR5194 is usually 5 days.
3.What payment methods are accepted for ISL85003FRZ-T7AR5194?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85003FRZ-T7AR5194 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85003FRZ-T7AR5194?
ISL85003FRZ-T7AR5194 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85003FRZ-T7AR5194 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 ISL85003FRZ-T7AR5194?
For technical support, including ISL85003FRZ-T7AR5194 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85003FRZ-T7AR5194 requirements.
6.How does Aetrix verify that ISL85003FRZ-T7AR5194 is sourced from the original manufacturer or authorized distributors?
All ISL85003FRZ-T7AR5194 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 ISL85003FRZ-T7AR5194 meets industry standards.
7.What is the process for return or replacement of ISL85003FRZ-T7AR5194?
All ISL85003FRZ-T7AR5194 units undergo pre-shipment inspection (PSI). If there is an issue with ISL85003FRZ-T7AR5194, 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 ISL85003FRZ-T7AR5194 part is unused and in its original packaging.
Return procedure for ISL85003FRZ-T7AR5194:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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