MP1522ET(2003) データシートの表示（PDF） - Monolithic Power Systems
部品番号
コンポーネント説明
一致するリスト
MP1522ET Datasheet PDF : 8 Pages
| |||
Monolithic Power Systems
MP1522
25V Step Up Converter
in 3mm QFN Package
Functional Description Continued
Diode
The high switching frequencies of the MP1522
require the use of fast recovery or schottky
barrier diodes. In low voltage applications
schottky barrier diodes are recommended for
maximum efficiency. The reverse breakdown
voltage should be approximately 1.5X the
output voltage.
Printed Circuit Board Layout
The printed circuit board layout is important in
order to minimize noise and prevent erratic
Figure 3: Typical Boost Application
operation. Keep the ground leads short and
robust with minimum lead lengths between the
input and output capacitors and ground. Place
the feedback resistive voltage divider as close
to FB as possible to prevent switching noise
injection into FB. The use of surface mount
capacitors with their low ESL is required to
minimize noise at the MP1522. Use separate
power and quiet ground planes connected
together at a single point whenever possible to
minimize.ground.bounce.
VIN
C1
1µ F
R1
100KΩ
L1
10µH
6 EN
SW 3
2
GND
MP1522
U1
BIAS
4
5
GND
FB 1
D1
RB751
C4
1µF
C2
0.1µF
VOUT =12V
R3
872KΩ
C3
22pF
R2
100KΩ
MP1522 Rev 1.7_06/26/03
Monolithic Power Systems, Inc.
6
Share Link: 