NATIONAL SEMICONDUCTOR LM20343 Manual
Update: 30 September, 2023
The LM20343 is a 36V, 3A adjustable frequency synchronous buck regulator with high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V, making it well suited for high 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. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good (PGOOD) circuit. By connecting an external resistor from the RT pin to ground, the frequency of this device can be adjusted from 250 kHz to 1.0 MHz. The LM20343 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 LM20343 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. The LM20343 is offered in an exposed pad 20-pin eTSSOP package that can be soldered.
Brand: National
File format: PDF
Size: 551 KB
MD5 Checksum: DADB7ACA6BF6CD880E10F9E0CFEC8BCF
Publication date: 02 May, 2012
Downloads: -
PDF Link: NATIONAL SEMICONDUCTOR LM20343 Manual PDF