Automotive 42V Dual Synchronous Boost and Low-Iq Buck Controllers with Integrated Drivers
Jump to Page Section:
Overview
Description
The ISL78263 offers synchronous boost and buck controllers. The boost controller operates either as an independent channel or as a pre-boost function that supplies the buck controller. The low-IQ buck controller uses only 6µA quiescent current, allowing it to support low-power, always-on operation. Both controllers support wide duty-cycles for switching frequencies from 200kHz to 2.2MHz. Both devices can be synchronized to an external clock and offer programmable spread spectrum clocking to mitigate EMI.
In pre-boost buck mode, the boost of the ISL78263 can be set to activate during falling VIN transients and continues to operate with an input voltage down to 2.1V. This allows the buck output to maintain regulation, even as the VIN voltage falls below its output. To support the increase in input current that occurs when VIN falls, the ISL78263 integrates robust MOSFET drivers to allow the use of multiple FETs in parallel.
ISL78263 is qualified to AEC-Q100 Grade 1 and is specified to operate across an ambient temperature range of -40°C to 125°C. The device is available in a 5mmx5mm, 32 Ld WFQFN (Wettable Flank) package. The features of the ISL78263 make it ideally suited as a front-end regulator for automotive systems that must maintain always-on operation and support severe cold-cranking transients.
Features
- VIN operating range: 2.1 to 42V
- Low quiescent current: 6µA typical, buck channel
- Switching frequency: 200kHz to 2.2MHz
- Boost frequency at 1x or 0.2x the buck frequency
- Dropout mode (buck) for high duty-cycle operation
- 25ns on-times for low duty-cycle operation
- External synchronization
- Programmable spread spectrum clocking
- 2A Sourcing / 3A sinking MOSFET drivers
- Boot UV and programmable boot refresh time
- Extensive protection mechanisms for OV/UV/OC/OT
Applications
Applications
- Automotive battery supplied application
- In cabin systems
- ADAS: Advanced Driver Assist Systems
- Start-stop protected systems (such as head unit, cluster, e-Mirror)
Design & Development
Boards & Kits
Boards & Kits
Automotive 42V Dual Synchronous Boost & Low-Iq Buck Controllers with Integrated Drivers Evaluation Board
The ISL78263EVAL1Z evaluation board is used to evaluate the dual-converter, synchronous buck-and-boost operation of the ISL78263 controller. The board evaluates Channel...
Featured Documents:
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.
Product Options
Processing table
| WFQFN | Tube | 600 | Get Samples, | |
ISL78263ARZ-T Active Samples Available |
WFQFN | Reel | 6000 | Get Samples, |
ISL78263ARZ-T7A Active Samples Available |
WFQFN | Reel | 250 | Get Samples, |
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