| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
2,774 pcs
|
2774 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
| Category | |
| Manufacturer Name | |
| Clock Sync | |
| Control Features | |
| Duty Cycle (Max) | |
| Frequency | |
| Function | |
| Mounting Type | |
| Number of Outputs | |
| Operating Temperature | |
| Output Configuration | |
| Output Phases | |
| Output Type | |
| SVHC Present | |
| Supplier Device Package | |
| Synchronous Rectifier | |
| Topology | |
| Voltage |
The LM51551DSSR from Texas Instruments is a high-performance DC DC switching controller supporting boost, flyback, and SEPIC topologies. It is designed for a wide input voltage range from 1.5V to 45V, making it suitable for various battery-powered applications. The controller features a maximum switching frequency of 2.2MHz, enabling smaller solution sizes and lower component costs.
Key electrical characteristics include adjustable current limit, frequency synchronization, hiccup mode protection, and UVLO adjustability. The device offers a maximum duty cycle of 93% and a typical quiescent current of 0.45mA. It supports soft start control and is available in a 12-WSON (3x2) or 12-WFDFN exposed pad package, both requiring surface mounting.
This controller is functional safety-capable and offers features like input transient protection up to 50V and minimized undershoot during cranking, suitable for start-stop applications. Its design facilitates primary-side regulation without an optocoupler in flyback configurations, simplifying the overall system design.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.80 | $0.80 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The input voltage range is 1.5V to 45V.
The maximum output voltage is 300V.
The operating junction temperature range is -40°C to 125°C.
The LM51551DSSR is available in a 12-WSON (3x2) surface mount package.
It supports boost, flyback, and SEPIC topologies.
Yes, it has clock synchronization capability.
The typical quiescent current is 0.45mA.