BD8305MUV Rohm, BD8305MUV Datasheet - Page 12
BD8305MUV
Manufacturer Part Number
BD8305MUV
Description
High-effciency Step-up/down Switching Regulators
Manufacturer
Rohm
Datasheet
1.BD8305MUV.pdf
(16 pages)
○
BD8305MUV
c
www.rohm.com
VOUT
2010 ROHM Co., Ltd. All rights reserved.
For setting of phase-lead frequency, both of them should be put near LC resonance frequency.
When GBW frequency becomes too high due to the secondary phase lead, it may get stabilized by setting the primary
phase delay to a frequency slightly higher than the LC resonance frequency by R3 to compensate it.
R1
R2
Fig.35 Example of setting of phase compensation
C1
R3
R4
C2
LC resonance frequency =
FB
Phase delay fp1 =
Phase lead fz1 =
Phase lead fz2 =
12/15
2πR1C1
2πR4C2
2πR3C1
2π√(LC)
1
1
1
1
[Hz]
[Hz]
[Hz]
[Hz]
www.DataSheet4U.com
Technical Note
2010.05 - Rev.D
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