Semtech SC2446A
Not Recommended for New Designs; use SC2447
The SC2446A is a high-frequency dual synchronous stepdown switching power supply controller. It provides out-of-phase output gate signals. The SC2446A operates in synchronous continuous-conduction mode.
Features
- 2-Phase synchronous continuous conduction mode for high efficiency step-down converters
- Out of phase operation for low input current ripples
- Output source and sink currents
- Fixed frequency peak current-mode control
- 50mV/-75mV maximum current sense voltage
- Inductive current-sensing for low-cost applications
- Optional resistor current-sensing for precise current-limit
- Dual outputs or 2-phase single output operation
- Excellent current sharing between individual phases
- Wide input voltage range: 4.7V to 16V
- Individual soft-start, overload shutdown and enable
- Duty cycle up to 88%
- 0.5V feedback voltage for low-voltage outputs
- External reference input for DDR applications
- Programmable frequency up to 1MHz per phase
- External synchronization
- Industrial temperature range
- 28-lead TSSOP lead free package. This product is fully WEEE and RoHS compliant
Applications
- Telecommunication power supplies
- DDR memory power supplies
- Graphic power supplies
- Servers and base stations
Order Codes
- SC2446AITSTRT: Lead-Free, 2500 pcs per tape and reel
Order Evaluation Boards
Semtech provides evaluation boards to help design engineers quickly and easily evaluate the performance of our devices for their application requirements.
To order, use our Evaluation Board Request Form below. One (1) free evaluation board may be requested per order form.
Eval boards are readily available for most of our new and popular products. If you wish to request boards for other parts, simply type the part number in the “Select Part Number” field space of the order form. These will be subject to availability.
|
