The LM3103 Synchronously Rectified Buck Converter features all required functions to
implement a highly efficient and cost effective buck regulator. It is capable of supplying 0.75A to
loads with an output voltage as low as 0.6V. Dual N-Channel synchronous MOSFET switches allow a low
component count, thus reducing complexity and minimizing board size.
Different from most other COT regulators, the LM3103 does not rely on output capacitor
ESR for stability, and is designed to work exceptionally well with ceramic and other very low ESR
output capacitors. It requires no loop compensation, results in a fast load transient response and
simple circuit implementation. The operating frequency remains nearly constant with line variations
due to the inverse relationship between the input voltage and the on-time. The operating frequency
can be externally programmed up to 1 MHz. Protection features include VCC
under-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive
under-voltage lock-out. The LM3103 is available in the thermally enhanced HTSSOP-16 package.
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