SP7606

12/17/07 rev: A

SP7600

©Copyright 2007 Exar Corporation

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filter characteristics are composed of a single

pole and a single zero. The following equations

show the location of the pole and zero for the

output filter of the boost regulator.

Cesr

Cout

ESRzero

⋅

⋅

⋅

=

π

2

1

For

most

applications

that

operate

in

discontinues conduction mode the internal

compensation is sufficient and no external

compensation is required.

Boost regulator output filter CCM

When a boost regulator is running in

continuous conduction mode the output filter

characteristics are composed of a filter double

pole an ESR_zero and a right half plane (RHP)

zero.

Frequency Hz

Gain dB

0

0 deg

Phase deg

-90 (deg)

Gain of Control to Output transfer DCM