LTC3538EDCB-TRPBF View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC3538EDCB-TRPBF' PDF : 16 Pages View PDF
LTC3538
OPERATION
Most applications demand an improved transient response
to allow a smaller output filter capacitor. To achieve a higher
bandwidth, Type III compensation is required, providing
two zeros to compensate for the double-pole response of
the output filter. Referring to Figure 5, the location of the
poles and zeros are given by:
ƒPOLE1
≅
2•
π
•
1
32e3
•
R1• CP1
Hz
(which is extremly close to DC)
ƒ ZERO1
=
2•
π
1
•RZ
•
CP1
Hz
ƒ ZERO2
=
2
•
π
1
• R1•
CZ1
Hz
ƒPOLE2
=
2•
π
1
•RZ
•
CP2
Hz
where resistance is in Ohms and capacitance is in
Farads.
VOUT
1V
R1
CZ1
FB
1
CP2
R2
VC
CP1
RZ
2
3538 F05
Figure 5. Error Amplifier with Type III Compensation
3538fb
13
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