The LM20242 is a full featured 1MHz capable synchronous buck regulator capable of delivering up to 2A of load current. The
current mode control loop is externally compensated with only two external components, offering both 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 PGOOD circuit.
The LM20242 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 LM20242 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 LM20242 is offered in an exposed pad 20 pin TSSOP package that can be soldered to the PCB, eliminating the need for bulky
heatsinks.
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
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