Overview
| Information | 800mA Synchronous Buck Regulator |
|---|---|
| # of Outputs | 1 |
| IOUT (A) | 0.8 |
| VIN MIN (V) | 2.7 |
| VIN MAX (V) | 5.5 |
| IQ (µA) | 20 |
| VOUT MIN (V) | 0.8 |
| VOUT MAX (V) | 5 |
| Frequency (kHz) | PFM |
| Accuracy (%) | <4.0 |
| Efficiency (%) | 98 |
| Package | MSOP-10, DFN-10 |
| X x Y Package Dimension (mm) | - |
| Control Mode | COT |
| Special Features | Light Load PFM, Enable, Over Current Protection, Synchronous Rectification, Thermal Shutdown, UVLO, Soft Start Built-in, Internal Compensation, 100% Duty Cycle |
| Operating Temperature (°C) | -40 to 85 |
The SP6651A is an 800mA synchronous buck regulator which is ideal for portable applications that use a Li-ion or 3-cell alkaline/NiCD/NiMH input. The SP6651A's proprietary control loop, 20μA light load quiescent current, and 0.3Ω power switches provide excellent efficiency across a wide range of output currents. As the input battery supply decreases towards the output voltage, the SP6651A seamlessly transitions into 100% duty ratio operation – further extending useful battery life. The SP6651A is protected against overload and short-circuit conditions with a precise inductor peak current limit. Other features include programmable undervoltage lockout and low battery detection, externally programmed output voltage down to 1.0V, logic level shutdown control and 140°C over temperature shutdown.
- DFN package (3mm x 3mm)
- Ultra-low 20µA quiescent current
- 98% efficiency possible
- 800mA output current
- 2.7V to 5.5V input voltage range
- Output adjustable down to 1.0V
- No external FETs required
- 1.25A inductor peak current limit
- 100% duty ratio low dropout operation
- 80μA light load quiescent current in dropout
- Over temperature protection
- Logic shutdown control
- Programmable UVLO and adaptive battery low output
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | SP6651A High Efficiency 800mA Synchronous Buck Regulator | 1.0.0 | December 2005 | 157.2 KB |
| Application Notes | ANP-22, Filter Design in Continuous Conduction Mode | B | January 2007 | 270.6 KB |
| User Guides & Manuals | SP6651A Evaluation Board Manual | 1.0.0 | September 2004 | 148.1 KB |
| Product Brochures | Power Management Brochure | October 2020 | 2.4 MB |
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
|---|---|---|---|---|---|---|
| SP6651AER | DFN10 3x3 OPT1 | -40 | 85 | OBS | ||
| SP6651AER-L | DFN10 3x3 OPT1 | -40 | 85 | OBS | ||
| SP6651AER-L/TR | DFN10 3x3 OPT1 | -40 | 85 | OBS | ||
| SP6651AER/TR | DFN10 3x3 OPT1 | -40 | 85 | OBS | ||
| SP6651AEU | MSOP10 | -40 | 85 | OBS | ||
| SP6651AEU-L | MSOP10 | -40 | 85 | OBS | SP6651AEU-L/TR | |
| SP6651AEU-L/TR | MSOP10 | -40 | 85 | OBS | ||
| SP6651AEU/TR | MSOP10 | -40 | 85 | OBS | ||
| SP6651AEB | Board | 0 | 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.
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