Overview
Description
The ISL85003 and ISL85003A are synchronous buck regulators with integrated high-side and low-side FETs. The regulator can operate from an input voltage range of 4. 5V to 18V while delivering a very efficient continuous 3A current. This is all delivered in a very compact 3mmx4mm DFN package. The ISL85003 is designed on Intersil’s proprietary fab process that is designed to deliver very low rDS(ON) FETs with an optimized current mode controller wrapped around it. The high-side NFET is designed to have an rDS(ON) of 65mΩ while the low-side NFET is designed to have an rDS(ON) of 45mΩ. With these two FETs, the device delivers very high efficiency power to the load. The ISL85003 can automatically switch between DCM and CCM for light-load efficiency in DCM. The switching frequency in CCM is internally set to 500kHz. The device provides a maximum static regulation tolerance of ±1% over wide line, load and temperature ranges. The output is user adjustable, with external resistors, down to 0. 8V. Pulling EN above 0. 6V enables the controller. The regulator supports prebiased output. Fault protection is provided by internal current limiting during positive or negative overcurrent conditions, output and input under and overvoltage detection and an over-temperature monitoring circuit.
Features
- Input voltage range 4.5V to 18V
- Output voltage adjustable from 0.8V, ±1%
- Efficiency up to 95%
- Integrated boot diode with undervoltage detection
- Current mode control
- DCM/CCM
- Internal or external compensation options
- 500kHz switching frequency option
- External synchronization up to 2MHz on ISL85003
- Adjustable soft-start time on the ISL85003A
- Open-drain PG window comparator
- Built-in protection
- Positive and negative overcurrent protection
- Overvoltage and thermal protection
- Input overvoltage protection
- Small 12 Ld 3mmx4mm Dual Flat No-Lead (DFN) package
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 5.21 MB | |
| White Paper | PDF 378 KB | |
| Application Note | PDF 592 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
| Application Note | PDF 650 KB | |
| Application Note | PDF 387 KB | |
| Application Note | PDF 349 KB | |
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Design & Development
Software & Tools
Software & Tools
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Software type
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| iSim:PE Offline Simulation Tool iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
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Simulator | Renesas |
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Boards & Kits
Demonstration
ISL85003DEMO1Z
Active
Highly Efficient 3A Synchronous Buck Regulator Demonstration Boards
The ISL85003DEMO1Z demonstration board is intended for use in point-of-load applications sourcing from 4.5V to 18V. The board is used to demonstrate the performance of the ISL85003 high-efficiency synchronous buck regulator. The ISL85003 is offered in a 4mm x 3mm dual flat no lead (DFN)...
Recommended Documents:
Evaluation
ISL85003EVAL2Z
Active
Highly Efficient 3A Synchronous Buck Regulator Evaluation Board
The ISL85003EVAL2Z evaluation kit is intended for use in point-of-load applications sourcing from 4.5V to 18V. The kit is used to demonstrate the performance of the ISL85003 low quiescent current, high-efficiency synchronous buck regulator. The ISL85003 is offered in a 4mm x 3mm dual flat no...
Recommended Documents:
Demonstration
ISLUSPLUS-UC1DEMO1Z
Active
Power Supply Reference Demo Board for the AMD Zynq Ultrascale+™ MPSoC
The ISLUSPLUS-UC1DEMO1Z and ISLUSPLUS-UC2DEMO1Z designs provide a power supply reference solution for the AMD Zynq™ UltraScale+™ MPSoC.
The power supply rail consolidation in the ISLUSPLUS-UC1DEMO1Z design is based on the configuration for always on, optimized for cost (Use Case 1). The...
Recommended Documents:
Demonstration
ISLUSPLUS-UC2DEMO1Z
Active
Power Supply Reference Demo Board for the AMD Zynq Ultrascale+™ MPSoC
The ISLUSPLUS-UC1DEMO1Z and ISLUSPLUS-UC2DEMO1Z designs provide a power supply reference solution for the AMD Zynq™ UltraScale+™ MPSoC.
The power supply rail consolidation in the ISLUSPLUS-UC1DEMO1Z design is based on the configuration for always on, optimized for cost (Use Case 1). The...
Recommended Documents:
Reference Designs
WIFI-SMART-POWER-STRIP-REF
Active
Wi-Fi Smart Power Strip Reference Design
A smart power strip is a popular household appliance, which is widely used in intelligent linkage control and power saving of connected devices, such as a mainframe computer with peripheral equipment, a television with set-top box and router, and more. This Wi-Fi Smart Power Strip reference...
Recommended Documents:
Starter
MCEK-RL78G24
Active
RL78/G24 Motor Control Evaluation Kit
The RL78/G24 Motor Control Evaluation Kit is a permanent magnet synchronous motor (brushless DC motor) control evaluation kit that is equipped with an RL78/G24 microcontroller and allows easy evaluation of motor control. Using the sample software available for download from the Renesas website,...
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Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Product Options
Applied Filters:
Videos & Training
12V Sync Buck Regulator Family Delivers Up to 14A
Find out how Intersil's high efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails in industrial and infrastructure applications.
Transcript
12V Synchronous Buck Regulator Family
Today I would like to introduce one of the most efficient and compact synchronous buck regulator families in the marketplace today.
There are many 12V rails in industrial applications today that need a buck converter to step the voltage down to a lower voltage and deliver up to 14A. Some of these applications often require a very efficient and compact solution. The highly integrated buck regulators listed here allow the users to meet all these requirements.
The ISL85009, ISL85012 and ISL85014 are pin compatible, very efficient and are able to deliver up to 14A. In applications that need less than 5A, Renesas offers ISL85003 and ISL85005 that are pin compatible. The ISL85009, ISL85012 and ISL85014 can operate from 3.8V to 18V input voltage, and the output voltage can be set as low as 0.6V. This family is highly integrated. The high-side and low-side FETs, with a bootstrap diode and compensation circuits are all integrated which helps to reduce the size, cost and bill of material.
This family is also highly reliable. It has high-side and low-side overcurrent protection, input and output overvoltage protection, over-temperature protection and negative current protection all integrated in the IC. This family also provides full feature sets and design flexibility to customers.
For instance, the selectable OCP scheme feature gives flexibility to the power supply designer to choose between hiccup and latch-off OCP mode, depending on their application requirements. Finally, the ISL85009, ISL85012 and ISL85014 are pin compatible, highly efficient and capable of delivering up to 14A in a very small 3.5mm x 3.5mm TQFN package.
As you see in the efficiency curve here, the ISL85009 provides one of the most efficient solution in the marketplace today. To support our customers with this family, we have developed several evaluation and demo boards.
Supporting tools such as iSim model, PowerCompass, schematic and Gerber files are all available online for this family on our website.
Video List
