Overview
Description
The ISL6522B provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous rectified buck topology. The ISL6522B integrates all of the control, output adjustment, monitoring and protection functions into a single package. The output voltage of the converter can be precisely regulated to as low as 0. 8V, with a maximum tolerance of ±1% over temperature and line voltage variations. The ISL6522B provides simple, single feedback loop, voltage-mode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a 15MHz gain-bandwidth product and 6V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0-100%. The ISL6522B protects against overcurrent conditions by inhibiting PWM operation. The ISL6522B monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.
Features
- Drives two N-Channel MOSFETs
- Operates from +5V or +12V input
- Simple single-loop control design
- Voltage-mode PWM control
- Fast transient response
- High-bandwidth error amplifier
- Full 0-100% duty ratio
- Excellent output voltage regulation
- 0.8V internal reference
- ±1% over line voltage and temperature
- Overcurrent fault monitor
- Does not require extra current sensing element
- Uses MOSFETs rDS(ON)
- Converter can source and sink current
- Pre-Biased Load Start Up
- Small converter size
- Constant frequency operation
- 200kHz free-running oscillator programmable from 50kHz to over 1MHz
- 14-lead SOIC package and 16-lead 5x5mm QFN Package
- QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat No Leads-Product Outline
- Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile
- Pb-Free Available (RoHS Compliant)
Comparison
Applications
Applications
- Power supply for Pentium®, Pentium Pro, PowerPC® and AlphaPC microprocessors
- FPGA Core DC/DC Converters
- Low-voltage distributed power supplies
Documentation
|
|
|
|
|---|---|---|
| Type | Title | Date |
| Datasheet | PDF 822 KB | |
| Product Change Notice | PDF 169 KB | |
| End Of Life Notice | PDF 320 KB | |
| Product Change Notice | PDF 152 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
6 items
|
||
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
| QFN | Tray | 3 | Get Samples, | ||
| QFN | Reel | 3 | |||
| QFN | Reel | 3 | 2.19 |
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