Simple Structural Improvement in PWM Boost Converter and PWM Controller Solves Malfunctions Caused when VOUT < VIN
This article describes how a simple structural improvement in a traditional boost converter and a simple PWM controller allows you to achieve I/O disconnect, eliminating malfunctions when VOUT < VIN.
A boost converter configured, and a controller controlled with
an I/O disconnect function, provides the
following benefits:
- Programmable soft turn-on for inrush
current control
- Hiccup mode for over-current
protection
- Complete shutdown with source-load
separation
- Simple loop compensation
- Protection for power MOSFET (Q2)
failure
These are important benefits for
high-performance power supplies in low- to
medium-power applications.
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Power Management ICs 
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