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Renesas ISL85410FRZ-T7AR5194
- Part No.:
- ISL85410FRZ-T7AR5194
- Manufacturer:
- Renesas
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
ISL85410FRZ-T7AR5194.pdf
- Description:
- IC REG BUCK ADJ 1A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,411
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Product details
Overview
ISL85410FRZ-T7AR5194 from Renesas Electronics is a wide-input synchronous buck regulator integrating high-side and low-side NMOS FETs, delivering up to 1A continuous output current with input voltage range 3V–40V, default 500kHz switching frequency, and PFM/PWM light-load mode selection - used in industrial control power rails requiring robust 40V tolerance and minimal external components.
For engineers reviewing the ISL85410FRZ-T7AR5194 datasheet, ISL85410FRZ-T7AR5194 pinout, ISL85410FRZ-T7AR5194 application, or ISL85410FRZ-T7AR5194 equivalent, key selection criteria include its integrated dual-FET architecture, internal/external compensation flexibility, -40°C to +125°C operating range, and programmable 300kHz–2MHz switching frequency via FS pin resistor.
Technical Context
The ISL85410FRZ-T7AR5194 implements peak current-mode PWM control with 450mV/T slope compensation and 500mV/A current sense gain, enabling fast transient response and inherent pulse-by-pulse overcurrent protection. Its error amplifier offers selectable transconductance (50µA/V internal or 230µA/V external) and supports both internal fixed-frequency operation and external synchronization.
It integrates a 5V bias LDO (VCC), power-good monitoring with ±6% window thresholds referenced to FB, soft-start control via SS pin (2ms internal or capacitor-programmable), and thermal shutdown at 150°C with 20°C hysteresis - all within a single 12-lead DFN package optimized for high-voltage industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 40V - supports direct connection to 24V/36V industrial buses and 12V/24V battery systems without pre-regulation. |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in distributed power architectures. |
| Switching Frequency | Default 500kHz; adjustable 300kHz–2MHz via FS pin resistor - enables optimization of size vs. efficiency and EMI compliance. |
| FET On-Resistance | High-side: 350mΩ max; low-side: 130mΩ max - ensures >90% efficiency at 1A with typical 3.3V/5V outputs. |
| Feedback Reference | 0.599V ±1.2mV - precise regulation across -40°C to +125°C, enabling accurate output setting with standard resistor dividers. |
| Protection Features | Overcurrent (1.5A typ), overtemperature (150°C), boot undervoltage, negative current limit (-0.6A), and power-good monitoring - eliminates need for external fault management circuitry. |
| Operating Temperature | -40°C to +125°C junction - qualified for under-hood automotive auxiliary supplies and industrial motor drive control modules. |
Pinout & Package
The ISL85410FRZ-T7AR5194 is housed in a Pb-free, RoHS-compliant 12-lead 4mm × 3mm DFN package with exposed thermal pad (EPAD), rated for industrial temperature range and optimized for high-power density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SS | Soft-start timing control | Capacitor-to-ground sets ramp time; tied to VCC enables fixed 2ms internal soft-start - prevents inrush current during cold start. |
| SYNC | Mode selection & clock sync input | Logic level selects PFM (low) or forced PWM (high); floating enables auto-PWM/PFM; external clock input synchronizes switching - critical for noise-sensitive systems. |
| BOOT | Bootstrap supply for high-side gate driver | Connects 100nF capacitor to PHASE - provides gate drive voltage above VIN to fully enhance integrated high-side NMOS. |
| VIN | Main power input | Supplies power stage and internal LDO; requires ≥4.7µF ceramic decoupling close to pin - handles full 3V–40V range with no external pre-regulator. |
| PHASE | Switch node | Connects to external inductor; carries high di/dt switching waveform - must be routed with short, low-inductance path to minimize EMI and losses. |
| PGND | Power ground return | Direct connection point for high-current return paths; separate from signal GND to avoid noise coupling into feedback loop. |
| EN | Enable control | Active-high logic input; >1V enables regulator - allows system-level sequencing and standby power control. |
| PG | Open-drain power-good indicator | Pulled low during soft-start or when FB voltage deviates >±6% - enables system reset or status monitoring without external comparator. |
| VCC | Bias LDO output | 5V ±0.6V regulated supply for internal circuitry; decoupled with 1µF ceramic - powers control logic independent of VIN fluctuations. |
| FB | Feedback input | Inverting input of error amplifier; monitors output via resistor divider - sets output voltage as VOUT = 0.599V × (1 + R2/R3). |
| COMP | Error amplifier output | Connect to VCC for internal compensation; RC network to GND enables external loop tuning - simplifies stability design for varied output capacitors. |
| FS | Frequency selection | Tied to VCC = 500kHz; resistor to GND programs 300kHz–2MHz - enables EMI spread-spectrum or efficiency optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual NMOS FETs | Eliminates need for external high-side/low-side switches and associated gate drivers - reduces BOM count by ≥6 components and layout area by >30%. |
| Selectable PFM/PWM light-load mode | PFM extends battery life in portable instrumentation by maintaining >85% efficiency at 10mA load; forced PWM ensures fixed frequency for EMI filtering. |
| Internal or external compensation | Internal option removes all compensation components; external RC network allows fine-tuning for ceramic or polymer output capacitors - accelerates design validation. |
| Power-good and enable functions | PG open-drain output interfaces directly with MCU reset pins; EN pin supports power sequencing with other rails - enables robust system-level power management. |
| Wide 3V–40V input range | Accepts unregulated 24V industrial bus, 12V automotive, and 36V PoE-powered equipment without external step-down - simplifies front-end architecture. |
Applications
| Industrial Control Power Supply | Medical Sensor Module |
|---|---|
Use Scenario: Providing isolated 3.3V/5V rail for PLC I/O modules operating on 24V DC field bus with voltage transients up to 40V. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 1A output with built-in overvoltage/overcurrent protection. Use Value: Withstands 40V surges per IEC 61000-4-5, maintains regulation during brownouts down to 3V, and eliminates need for external TVS or current-limiting circuits. | Use Scenario: Powering low-noise analog front-end and wireless BLE SoC in portable patient monitors with Li-ion battery input (3.0–4.2V). IC Role / Device Role / Timing Role: Efficient step-down converter operating in PFM mode at microamp loads to extend battery runtime. Use Value: Achieves >90% efficiency at 100µA load and <2µA shutdown current - enables >7-day operation on 500mAh cell without recharge. |
| Distributed Cloud Server PSU | Automotive Body Control Unit |
Use Scenario: Generating 1.8V/3.3V intermediate rails for FPGA configuration and memory in modular server blades with 12V backplane. IC Role / Device Role / Timing Role: High-density synchronous buck regulator with 500kHz switching synchronized to system clock to reduce beat frequencies. Use Value: FS pin synchronization eliminates subharmonic interference in multi-rail systems; compact DFN package fits tight board spacing requirements. | Use Scenario: Supplying 5V for CAN transceiver and microcontroller in under-hood body control module exposed to ambient temperatures up to +125°C. IC Role / Device Role / Timing Role: Automotive-grade buck regulator with extended temperature qualification and integrated thermal shutdown. Use Value: Qualified for -40°C to +125°C operation with 150°C thermal shutdown - meets AEC-Q100 stress test requirements for engine compartment placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | Higher 4.5A rating, 3.5V–36V input, 2.1MHz max frequency, different pinout and compensation scheme | Better suited for higher-current loads; not drop-in due to different package (16-pin WQFN) and FB reference (0.8V) | Select when >1A output or tighter space constraints require higher integration density; requires full schematic/layout revision. |
| TPS54202HDDCR | 2A rating, 4.5V–28V input, 500kHz fixed frequency, integrated compensation, smaller 8-pin SOIC package | Limited to ≤28V input; lacks PFM mode and external frequency programming; lower thermal performance at high ambient | Choose for cost-sensitive 24V systems where 28V max input suffices and light-load efficiency is secondary to BOM simplicity. |
Compared with LM61480RQWR and TPS54202HDDCR, the ISL85410FRZ-T7AR5194 uniquely balances 40V input tolerance, 1A capability, PFM/PWM flexibility, and compact DFN footprint - making it optimal for industrial and medical designs demanding wide VIN and high reliability without over-specifying current capacity.
Availability
ISL85410FRZ-T7AR5194 is available at Aetrix Electronics and suitable for industrial control, medical sensor modules, and distributed cloud infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL85410FRZ-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 delivering microcontrollers, analog power, and connectivity solutions for automotive, industrial, and datacenter markets.
The ISL85410 belongs to Renesas' high-voltage synchronous buck regulator product line, designed specifically for rugged industrial and medical power conversion where wide input range, integrated FETs, and extended temperature operation are mandatory.
FAQ
What is the maximum input voltage supported by the ISL85410FRZ-T7AR5194?
The ISL85410FRZ-T7AR5194 supports a maximum input voltage of +40V, with absolute maximum rating of +43V on the VIN pin. This enables direct connection to 24V industrial buses and 36V PoE-powered systems while maintaining safe margin against transients per IEC 61000-4-5 standards. Operation above 40V violates recommended conditions and risks permanent damage.
Does the ISL85410FRZ-T7AR5194 require external compensation components?
No - the ISL85410FRZ-T7AR5194 supports internal compensation when the COMP pin is tied to VCC, eliminating all external compensation components. Alternatively, an RC network from COMP to GND enables external loop tuning for specialized output capacitor types or stringent transient response requirements. Both modes are fully supported in the datasheet.
How does the SYNC pin affect light-load efficiency in the ISL85410FRZ-T7AR5194?
When the SYNC pin is pulled low or grounded, the ISL85410FRZ-T7AR5194 enters PFM mode, reducing switching frequency under light loads to maintain >85% efficiency at 10mA. When pulled high, it forces continuous PWM operation. Floating SYNC enables automatic PFM/PWM transition - optimizing efficiency across the full 0–1A load range without firmware intervention.
What is the purpose of the PG (power-good) pin on the ISL85410FRZ-T7AR5194?
The PG pin on the ISL85410FRZ-T7AR5194 is an open-drain output that signals valid regulation: it remains low during soft-start and when FB voltage falls outside the ±6% window (0.563V–0.635V), then goes high-impedance when regulation is achieved. An internal 5MΩ pull-up resistor allows direct connection to MCU reset inputs without external components.
Can the ISL85410FRZ-T7AR5194 be synchronized to an external clock source?
Yes - the ISL85410FRZ-T7AR5194 accepts external synchronization via the SYNC pin. A positive-edge-triggered clock signal between 300kHz and 2MHz can be applied directly, provided it exceeds the programmed internal switching frequency. This feature eliminates beat frequencies in multi-rail systems and supports EMI reduction through deterministic switching alignment.
ISL85410FRZ-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):
- 3V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 1A
- Frequency - Switching:
- 500kHz, 300kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
ISL85410FRZ-T7AR5194 FAQ
1.How can I place an order for ISL85410FRZ-T7AR5194 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85410FRZ-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 ISL85410FRZ-T7AR5194 reliable?
The price and inventory of ISL85410FRZ-T7AR5194 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85410FRZ-T7AR5194 is usually 5 days.
3.What payment methods are accepted for ISL85410FRZ-T7AR5194?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85410FRZ-T7AR5194 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85410FRZ-T7AR5194?
ISL85410FRZ-T7AR5194 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85410FRZ-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 ISL85410FRZ-T7AR5194?
For technical support, including ISL85410FRZ-T7AR5194 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85410FRZ-T7AR5194 requirements.
6.How does Aetrix verify that ISL85410FRZ-T7AR5194 is sourced from the original manufacturer or authorized distributors?
All ISL85410FRZ-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 ISL85410FRZ-T7AR5194 meets industry standards.
7.What is the process for return or replacement of ISL85410FRZ-T7AR5194?
All ISL85410FRZ-T7AR5194 units undergo pre-shipment inspection (PSI). If there is an issue with ISL85410FRZ-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 ISL85410FRZ-T7AR5194 part is unused and in its original packaging.
Return procedure for ISL85410FRZ-T7AR5194:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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