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LM5115
www.ti.com SNVS343E – MARCH 2005 – REVISED MARCH 2013 LM5115 Secondary Side Post Regulator / Synchronous Buck Controller
Check for Samples: LM5115 FEATURES DESCRIPTION The LM5115 is a versatile switching regulator
controller. It 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
(Please
see
Standalone
DC/DC
Synchronous Buck Mode for more details). 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 …
