概要
説明
The ISL85415DEMO2Z board is intended for use in point-of-load applications sourcing from 3V to 36V. The board is used to demonstrate the performance of the ISL85415 wide VIN, low quiescent current, high-efficiency synchronous buck regulators with 500mA of output current.
特長
- Wide input voltage range: 3V to 36V
- High-efficiency synchronous buck regulator using an isolated secondary output
- Synchronous operation for high efficiency
- No compensation required
- Integrated high-side and low-side NMOS devices
- Selectable PFM or forced PWM mode at light loads
- Internal fixed (500kHz) or adjustable switching frequency 300kHz to 2MHz
- Continuous output current up to 500mA
- Internal or external soft-start
- Minimal external components required
- Power-good and enable functions available
アプリケーション
アプリケーション
- Industrial control
- Medical devices
- Portable instrumentation
- Distributed power supplies
- Cloud Infrastructure
設計・開発
ソフトウェア／ツール
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product
ビデオ&トレーニング
See how easy it is to design with Intersil's new pin-for-pin compatible synchronous buck regulators with a wide input voltage range. With three different output current options, these highly efficient sync buck regulators simplify power circuit design and enable reuse of circuit board design across a wide range of end applications.
Transcript
Hi, my name is Paul Orfanu, I'm an application engineer for Intersil. I'm going to introduce ISL85415 that will help you simplify your design while maintaining similar efficiency or better than standard buck regulators. This one is a synchronous buck regulator, and let me show how this topology works. This is the block diagram that you may find on the datasheet. We have the two upper and lower FET integrated, which eliminates the the needs for external drivers. And also, we have integrated the compensation. It could be internal compensation or external compensation. That also eliminates the need for components.
In order to have performance optimization, we also have the frequency that also can be adjustable. By looking at the performance of efficiency, we have optimized the curves that indicates at light load our efficiency can go up to 95%. And in heavy load, it's also maintaining to reduce oscillation of the output FETs, integrated FETs. So while I'm integrating them, we'll also ensure a very good performance, by minimizing their oscillation. Going back to the topology, because of the peak current mode control pulse with modulation architecture, there is also a fast transient response that this part can have, can ensure. Also, the part has synchronization, as a sync pin. If the sync pin is tied high, that can ensure PWM, forced PWM operation. If the sync pin is tied low, then there will be a forced PFM.
However, the part will have a very good transition, PFM to PWM, because of this architecture. Also, in PWM mode the frequency can be internal, D4 500kHz, while external selectable from 300kHz to 2MHz optimized component inefficiency. And also output voltage is selectable from 0.6V all the way to 95% of the input voltage. Quiescent current is also very low on the part, as well as shutdown current. Enable and power-good are also additional added features. That is also explained in the data sheet. All these features and calculations are explained in the application note and data sheet. You might refer to them.
Because of its wired input voltage range, eight out of ten design engineers would have a need to use this part in their application, from consumer devices to industrial markets.