The LM5115MTC is a versatile Switching Regulator Controller has two main application configurations. The first is utilizing the secondary side post regulation (SSPR) technique to implement multiple output power converters. In the second configuration, it can be used as a standalone synchronous buck controller. The SSPR technique develops a highly efficient and well regulated auxiliary output from the secondary side switching waveform of an isolated power converter. Regulation of the auxiliary output voltage is achieved by leading edge pulse width modulation (PWM) of the main channel duty cycle. Leading edge modulation is compatible with either current-mode or voltage mode control of the main output. The LM5115 drives external high side and low side NMOS power switches configured as a synchronous buck regulator. A current sense amplifier provides overload protection and operates over a wide common mode input range.
Self-synchronization to main channel output
Standalone DC/DC synchronous buck mode
Leading edge pulse width modulation
Voltage-mode control with current injection and input line feed-forward
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