Overview
| Information | 3A 900kHz Buck Regulator |
|---|---|
| # of Outputs | 1 |
| IOUT (A) | 3 |
| VIN MIN (V) | 2.5 |
| VIN MAX (V) | 20 |
| IQ (µA) | 1500 |
| VOUT MIN (V) | 0.8 |
| VOUT MAX (V) | 19 |
| Frequency (kHz) | 900 |
| Accuracy (%) | 1.0 |
| Efficiency (%) | 92 |
| Package | DFN-26 |
| X x Y Package Dimension (mm) | 7x4 |
| Control Mode | Voltage Mode PWM |
| Special Features | Enable, Power Sequencing, Synchronous Rectification, Thermal Shutdown, UVLO Adjustable, Soft Start Adjustable |
| Operating Temperature (°C) | -40 to 125 |
The SP7651 is a high voltage synchronous step-down switching regulator optimized for high efficiency. The part is designed to be especially attractive for dual supply, 12V step-down with 5V used to power the controller. This lower VCC voltage minimizes power dissipation in the part. The SP7651 is designed to provide a fully integrated buck regulator solution using a fixed 900kHz frequency, PWM voltage mode architecture. Protection features include UVLO, thermal shutdown and output short-circuit protection. The SP7651 is available in the space saving 7mm X 4mm DFN package.
- 2.5V to 20V step-down achieved using dual input
- Output voltage down to 0.8V
- 3A output capability (up to 5A with air flow)
- Built in low RDSON power FETs (40 mΩ typ)
- Highly integrated design, minimal components
- 900 kHz fixed frequency operation
- UVLO detects both VCC and VIN
- Over temperature protection
- Short circuit protection with auto restart
- Wide BW Amp allows type II or III compensation
- Programmable soft-start
- Fast transient response
- High efficiency: greater than 92% possible
- Nonsynchronous start up into a pre-charged output
- Small 7mm x 4mm DFN package
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | SP7651 Wide Input Voltage Range 3Amp 900kHz Buck Regulator | 1.0.0 | March 2007 | 1 MB |
| Application Notes | AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian | April 2019 | 1.2 MB | |
| Design Solutions | DS-65, SP7651 First Generation PowerBlox Creates 2A Peak Current off Adapter 12V Secondary (10V to 15V Input) | June 2007 | 113.4 KB | |
| Spice Models - Generic | Generic Spice Model | November 2007 | 4.2 KB | |
| Spice Models - OrCAD | Orcad Spice Model | November 2007 | 20.3 KB | |
| Product Brochures | Power Management Brochure | R01 | November 2024 | 2.4 MB |
| SIMPLIS Models | SP7651 SIMPLIS Model | May 2011 | 12.9 MB | |
| Symbols & Footprints | SP7651ER-L/TR CAD File (.bxl) | September 2018 | 46 KB | |
| SIMPLIS Models | Powerlab Netlists | |||
Quality & RoHS
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
|---|---|---|---|---|---|---|
| SP7651BER-L | DFN26 7x4 | -40 | 85 | OBS | ||
| SP7651ER | DFN26 7x4 | -40 | 85 | OBS | ||
| SP7651ER-L | DFN26 7x4 | -40 | 85 | OBS | SP7651ER-L/TR | |
| SP7651ER-L/TR | DFN26 7x4 | -40 | 85 | OBS | SP7652ER-L/TR | |
| SP7651ER/TR | DFN26 7x4 | -40 | 85 | OBS |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
| Pkg Code | Details | Quantities | Dimensions |
|---|---|---|---|
| DFN26 7x4 |
|
|
|
Notifications
FAQs & Support
Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.
Submit a Technical Support Question As a New Question
The Parts & Purchasing section of the product page shows the Status of all orderable part numbers for that product. Click Show obsolete parts, to see all EOL or OBS products.
