The LM20143 devices are full featured PowerWise™ adjustable frequency synchronous buck regulators capable of delivering up to 3 A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95 V to 5.5 V, making it suited for a wide variety of low voltage systems.
The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.
The frequency of this device can be adjusted from 500 kHz to 1.5 MHz by connecting an external resistor from the RT pin to ground.
The LM20143 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20143 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM20143/LM20143-Q1 3-A PowerWise™ AdjustableFrequency Synchronous Buck Regulator datasheet (Rev. H) | PDF | HTML | 05 Jan 2016 |
| EVM User's guide | AN-1691 LM20143 Evaluation Board (Rev. B) | 05 May 2013 | ||
| Application note | AN-1747 3A LM20k Reference Designs (Rev. A) | 03 May 2013 | ||
| Application note | AN-2077 LM20k POL Module (Rev. A) | 03 May 2013 |
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The LM20143 is a full featured buck switching regulator capable of driving up to 3A of load current. The switching frequency of the LM20143 can be varied from 500kHz to 1.5Mhz with an external resistor allowing the size of the power stage components to be reduced while still providing efficient (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
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