The LM3100MHX Synchronously Rectified Buck Converter features all functions needed toimplement a highly efficient, cost effective buck regulator capable of supplying 1.5 A to loadswith voltages as low as 0.8 V. Dual 40 V N-Channel synchronous MOSFET switches allow for lowexternal component thus reducing complexity and minimizing board space. The LM3100MHX is designed towork exceptionally well with ceramic and other very low ESR output capacitors. The Constant ON-Time(COT) regulation scheme requires no loop compensation, results in fast load transient response, andsimplifies circuit implementation. Through the use of a unique design the regulator does not relyon output capacitor ESR for stability, as do most other COT regulators. The operating frequencyremains nearly constant with line and load variations due to the inverse relationship between theinput voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz.Protection features include VCC under-voltage lockout, thermal shutdown andgate drive under-voltage lockout. The part is available in a thermally enhanced HTSSOP-20package
Feature
- Input Voltage Range 4.5 V to 36 V
- 1.5 A Output Current
- 0.8 V, ±1.5% Reference
- Integrated 40 V, Dual N-Channel Buck Synchronous Switches
- Low Component Count and Small Solution Size
- No Loop Compensation Required
- Ultra-Fast Transient Response
- Stable With Ceramic and Other Low ESR Capacitors
- Programmable Switching Frequency up to 1 MHz
- Max. Duty Cycle Limited During Start-Up
- Valley Current Limit
- Precision Internal Reference for Adjustable Output Voltage Down to 0.8 V
- Thermal Shutdown
- Thermally Enhanced HTSSOP-20 Package
