The SP6123 is a fixed frequency, voltage mode, synchronous PWM controller designed to work from a single 5V or 3.3V input supply, providing excellent AC and DC regulation for high efficiency power conversion. Requiring only few external components, the SP6123 packaged in an 8-pin NSOIC, is especially suited for low voltage applications where cost, small size and high efficiency are critical. The operating frequency is internally set to 300kHz (SP6123) or 500kHz (SP6123A), allowing small inductor values and minimizing PC board space. The SP6123 drives an all N-channel synchronous power MOSFET stage for improved efficiency and includes an accurate 0.8V reference for low output voltage applications.
- Optimized for single supply, 3V to 5.5V applications
- High efficiency: greater than 95% possible
- Accurate fixed 300kHz (SP6123) or 500kHz (SP6123A) frequency operation
- Fast transient response
- Internal soft-start circuit
- Accurate 0.8V reference allows low output voltages
- Resistor programmable output voltage
- Loss-less current limit with high side RDS(ON) sensing
- Hiccup mode current limit protection
- Dual N-channel MOSFET synchronous driver
- Quiescent current: 500µA, 30µA in shutdown
- 8-Pin surface mount package
- Frequency for SP6123A is 500kHz
- ANP-15, Voltage Mode Control: The Modulator in Continuous Current Mode (CCM) of operation
- ANP-16, Loop Compensation of Voltage-Mode Buck Converters
- ANP-16, Type III Loop Compensation Calculator
- ANP-18, Selecting Appropriate Compensation: Type-II or Type-III
- ANP-18, Type II Loop Compensation Calculator
- ANP-20, Properly Sizing MOSFETs for PWM Controllers
- Downloading and Installing CAD Symbols and Footprints with Ultra Librarian
Spice Models - OrCAD
Spice Models - Generic
Parts & Purchasing
|Part Number||Pkg Code||RoHS||Min Temp||Max Temp||Status||Buy Now||Order Samples|
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.
Frequently Asked Questions
In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result. This brings you to the product page. For example:
Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:
Notice the status column and the “Show obsolete parts” link. A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:
Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:
And then Product Change Notifications:
Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:
If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.