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Renesas ISL85413FRTZT7AR5726
- Part No.:
- ISL85413FRTZT7AR5726
- Manufacturer:
- Renesas
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
ISL85413FRTZT7AR5726.pdf
- Description:
- IC REG BUCK ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,382
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Product details
Overview
ISL85413FRTZT7AR5726 from Renesas (formerly Intersil) is a wide-input synchronous buck regulator IC delivering up to 300mA continuous output current with input voltage range 3.5V–40V, fixed 700kHz switching frequency, integrated high-side/low-side NMOS FETs, and PFM/PWM mode selection-used in industrial control power rails and battery-powered instrumentation.
For engineers reviewing the ISL85413FRTZT7AR5726 datasheet, ISL85413FRTZT7AR5726 pinout, ISL85413FRTZT7AR5726 application, or ISL85413FRTZT7AR5726 equivalent, key selection criteria include its -40°C to +125°C junction temperature rating, internal soft-start and power-good functions, no-compensation design, and TDFN-8 3mm×3mm package compatibility with high-voltage DC/DC point-of-load requirements.
Technical Context
The ISL85413FRTZT7AR5726 implements peak current-mode PWM control with 450mV/T slope compensation and 930mV/A current sense transresistance, enabling stable regulation across wide VIN and load variations. Its error amplifier features 50µA/V transconductance and internal 150kΩ/54pF compensation network.
It integrates a 5V bias LDO (VCC), power-on reset with 3.46V rising threshold, thermal shutdown at 150°C with 20°C hysteresis, and overcurrent protection with 0.6A typical positive peak limit and -0.3A negative current limit-ensuring robust operation in unregulated 12V/24V/36V industrial supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 40V - supports direct connection to 12V/24V/36V industrial bus rails and wide-range battery inputs without pre-regulation. |
| Output Current | 300mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in compact embedded systems. |
| Switching Frequency | 700kHz nominal - enables use of small external inductors (e.g., 10–47µH) and reduces output ripple without compromising EMI performance. |
| Integrated FETs | High-side RDS(on) = 1.3Ω, low-side RDS(on) = 0.8Ω - eliminates external MOSFETs and gate drivers, reducing BOM count and layout complexity. |
| Feedback Reference | 0.599V ±10mV - sets output voltage via resistor divider; enables precise 1.0V–12V outputs with <±1.5% regulation over load and temperature. |
| Operating Temp | -40°C to +125°C junction - qualified for under-hood automotive auxiliary rails and industrial PLC modules without derating. |
| Package | 8-pin TDFN 3mm×3mm - thermally enhanced exposed pad supports >1W dissipation with minimal PCB area. |
Pinout & Package
The ISL85413FRTZT7AR5726 is housed in an RoHS-compliant, Pb-free 8-lead 3mm×3mm TDFN package with exposed thermal pad (EPAD) requiring ≥5 vias to GND plane per datasheet layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | Mode selection logic input | Configures PFM (ground) or forced PWM (VCC/high); internal 5MΩ pull-down prevents floating state. |
| 2 BOOT | Bootstrap supply node | Drives high-side FET gate; requires 100nF ceramic capacitor to PHASE for proper gate drive voltage generation. |
| 3 VIN | Main power input | Supplies both power stage and internal LDO; requires ≥10µF ceramic decoupling close to pin. |
| 4 PHASE | Switch node | Connects internal FETs to external inductor; fast edge (10ns rise time) demands tight layout to minimize ringing. |
| 5 EN | Enable control input | Active-high enable with 1.45V rising threshold; connects to VIN for automatic startup or microcontroller GPIO for sequencing. |
| 6 PG | Open-drain power-good | Asserts low during soft-start, UVLO, or overtemperature; internal 5MΩ pull-up enables direct MCU monitoring without external resistor. |
| 7 VCC | Bias LDO output | 5V ±0.5V regulated supply for internal circuitry; requires 1µF ceramic decoupling to PGND. |
| 8 FB | Voltage feedback input | Inverting input of error amplifier; monitors output via resistor divider; also used by PG and UVLO circuits. |
| EPAD | Thermal & signal ground | Must be connected to PCB GND plane with ≥5 thermal vias; floating EPAD causes thermal failure and regulation instability. |
Key Features
| Feature | Design Value |
|---|---|
| No external compensation required | Internal 150kΩ/54pF RC network eliminates loop compensation components, reducing design iterations and board space. |
| Selectable PFM/PWM light-load mode | PFM extends battery life in portable instrumentation by reducing quiescent current to 50µA; PWM ensures fixed-frequency EMI control in noise-sensitive systems. |
| Integrated power-good (PG) output | Open-drain PG provides system-level power sequencing and fault indication without external comparators or pull-ups. |
| Internal soft-start (2.3ms) | Prevents inrush current into downstream capacitors, eliminating need for external soft-start timing components or controllers. |
| Robust protection suite | Includes overcurrent (0.6A peak), overtemperature (150°C), boot undervoltage, and negative current limiting-enabling reliable operation in harsh environments. |
Applications
| Industrial Control Power | Portable Medical Instrumentation |
|---|---|
Use Scenario: Powering PLC I/O modules and sensor signal conditioning circuits from 24V DC bus with strict thermal constraints. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator providing clean, regulated supply with fast transient response to digital logic loads. Use Value: Wide 3.5V–40V input accommodates brownout and surge conditions on factory floor wiring; 125°C rating avoids derating in enclosed enclosures. | Use Scenario: Supplying low-noise analog front-end and Bluetooth LE radio in handheld diagnostic devices powered by single-cell Li-ion (3.0–4.2V) or dual-cell (6–8.4V). IC Role / Device Role / Timing Role: Efficient step-down converter enabling >100-hour battery life via PFM mode at standby currents <100µA. Use Value: 50µA quiescent current in PFM mode and internal soft-start prevent battery voltage sag during startup-critical for accurate sensor readings. |
| Distributed Cloud Infrastructure | High-Voltage Battery Monitoring |
Use Scenario: Generating 1.2V/1.8V core supplies for FPGA configuration and management controllers in 48V intermediate bus architectures. IC Role / Device Role / Timing Role: Secondary buck regulator converting 12V intermediate rail to sub-2V logic supplies with tight output tolerance. Use Value: 0.599V reference and ±1.5% regulation ensure FPGA I/O compliance; 700kHz switching allows compact 10µH inductors in dense server PCB layouts. | Use Scenario: Powering isolated ADCs and CAN transceivers in EV battery pack monitoring units operating from 60–80V nominal packs. IC Role / Device Role / Timing Role: Pre-regulator stepping down high-voltage battery tap (e.g., 40V) to 5V for isolated data acquisition subsystems. Use Value: 40V absolute max input rating and 43V transient tolerance allow direct connection to battery taps without Zener clamping; thermal shutdown protects against cell imbalance faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3.3V–36V input, 600mA output, 2MHz switching, no PFM mode, requires external compensation. | Better suited for space-constrained designs needing higher current and faster switching; lacks auto-PFM for ultra-low IQ. | Choose MP2451DT-LF-Z when higher output current and smaller inductors are prioritized over light-load efficiency. |
| TPS563201DDFR | 4.5V–17V input, 3A output, 500kHz–1.7MHz adjustable frequency, integrated compensation, 15µA IQ in Eco-mode. | Optimized for low-voltage, high-current applications like USB-C PD accessories; incompatible with >17V inputs. | Choose TPS563201DDFR for 5V/12V input systems requiring >1A output and lowest possible quiescent current. |
Compared with MP2451DT-LF-Z and TPS563201DDFR, the ISL85413FRTZT7AR5726 uniquely balances 40V input capability, integrated PFM/PWM mode, no-compensation design, and 3mm×3mm footprint-making it optimal for industrial and battery-powered systems demanding wide VIN, moderate current, and minimal external components.
Availability
ISL85413FRTZT7AR5726 is available at Aetrix Electronics and suitable for industrial control, portable medical instrumentation, and distributed cloud infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL85413FRTZT7AR5726 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 is a global semiconductor leader formed from the merger of Renesas Technology and NEC Electronics, specializing in microcontrollers, analog power, and SoC solutions for industrial, automotive, and infrastructure markets.
The ISL85413FRTZT7AR5726 belongs to Renesas' wide-input synchronous buck regulator product line, designed specifically for high-reliability DC/DC conversion in harsh environments where input voltage variation, thermal stress, and component count reduction are critical design constraints.
FAQ
What is the maximum input voltage rating for the ISL85413FRTZT7AR5726?
The ISL85413FRTZT7AR5726 has an absolute maximum input voltage rating of +43V, with recommended operating range from +3.5V to +40V. This allows direct connection to 36V nominal industrial buses and 40V battery systems while maintaining margin against transients. Operation beyond 40V is not recommended for sustained use per datasheet specifications.
Does the ISL85413FRTZT7AR5726 require external compensation components?
No, the ISL85413FRTZT7AR5726 does not require external compensation components. It incorporates an internal 150kΩ resistor and 54pF capacitor network that fully compensates the voltage loop, enabling stable operation across all supported output voltages and external inductor/capacitor combinations without additional parts.
How does the MODE pin affect light-load efficiency in the ISL85413FRTZT7AR5726?
When the MODE pin of the ISL85413FRTZT7AR5726 is grounded, the device automatically enters PFM mode below ~15mA load, reducing quiescent current to 50µA and improving light-load efficiency by up to 20% compared to forced PWM. Pulling MODE high forces continuous PWM operation regardless of load, ensuring fixed-frequency EMI behavior.
What thermal management guidance applies to the ISL85413FRTZT7AR5726's exposed pad?
The ISL85413FRTZT7AR5726's EPAD must be soldered to the PCB ground plane using at least five thermal vias (0.3mm diameter minimum) to ensure θJA ≤ 47°C/W. Failure to connect the EPAD results in junction temperature exceeding 150°C at <150mA load, triggering thermal shutdown and potential reliability degradation.
Can the ISL85413FRTZT7AR5726 be used to generate a 1.0V output?
Yes, the ISL85413FRTZT7AR5726 can generate a precise 1.0V output using the FB pin and an external resistor divider. With its 0.599V ±10mV reference, a standard R1=90.9kΩ/R2=137kΩ divider achieves 1.0V output with <±1.5% total regulation error across -40°C to +125°C and full 0–300mA load range.
ISL85413FRTZT7AR5726 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-WFDFN 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):
- 3.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 300mA
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
ISL85413FRTZT7AR5726 FAQ
1.How can I place an order for ISL85413FRTZT7AR5726 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85413FRTZT7AR5726 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 ISL85413FRTZT7AR5726 reliable?
The price and inventory of ISL85413FRTZT7AR5726 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85413FRTZT7AR5726 is usually 5 days.
3.What payment methods are accepted for ISL85413FRTZT7AR5726?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85413FRTZT7AR5726 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85413FRTZT7AR5726?
ISL85413FRTZT7AR5726 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85413FRTZT7AR5726 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 ISL85413FRTZT7AR5726?
For technical support, including ISL85413FRTZT7AR5726 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85413FRTZT7AR5726 requirements.
6.How does Aetrix verify that ISL85413FRTZT7AR5726 is sourced from the original manufacturer or authorized distributors?
All ISL85413FRTZT7AR5726 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 ISL85413FRTZT7AR5726 meets industry standards.
7.What is the process for return or replacement of ISL85413FRTZT7AR5726?
All ISL85413FRTZT7AR5726 units undergo pre-shipment inspection (PSI). If there is an issue with ISL85413FRTZT7AR5726, 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 ISL85413FRTZT7AR5726 part is unused and in its original packaging.
Return procedure for ISL85413FRTZT7AR5726:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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