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MP4473GL bảng dữ liệu(PDF) 18 Page - Monolithic Power Systems

tên linh kiện MP4473GL
Giải thích chi tiết về linh kiện  High-Efficiency, Fast-Transient, 3.5A, 36V Synchronous, Step-Down Converter
PDF  21 Pages
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nhà sản xuất  MPS [Monolithic Power Systems]
Trang chủ  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

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MP4473–HIGH-EFFICIENCY, FAST-TRANSIENT, SYNCHRONOUS, STEP-DOWN CONVERTER
MP4473 Rev. 1.0
www.MonolithicPower.com
18
12/15/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
Typical Design Parameter Tables
The following tables include recommended
component values for typical output voltages
(3.3V, 5V) and switching frequencies (300kHz,
500kHz, and 700kHz). Refer to tables 1—3 for
design
cases
without
external
ramp
compensation. Refer to tables 4—6 for design
cases with external ramp compensation. An
external ramp is not needed when using high-
ESR
capacitors,
such
as
electrolytic
or
POSCAPs. An external ramp is needed when
using low-ESR capacitors, such as ceramic
capacitors. To calculate approximate component
values for cases not listed, an Excel spreadsheet
is
available
through
your
local
sales
representative.
Table 1: 300kHz, 24VIN
VOUT
(V)
L
(μH)
R1
(kΩ)
R2
(kΩ)
RFREQ
(kΩ)
3.3
10
30.1
10
110
5
10
51.1
10
169
Table 2: 500kHz, 24VIN
VOUT
(V)
L
(μH)
R1
(kΩ)
R2
(kΩ)
RFREQ
(kΩ)
3.3
10
30.1
10
63.4
5
10
51.1
10
100
Table 3: 700kHz, 24VIN
VOUT
(V)
L
(μH)
R1
(kΩ)
R2
(kΩ)
RFREQ
(kΩ)
3.3
10
30.1
10
44.2
5
10
51.1
10
69.8
Table 4: 300kHz, 24VIN
VOUT
(V)
L
(μH)
R1
(kΩ)
R2
(kΩ)
R4
(kΩ)
C4
(pF)
RFREQ
(kΩ)
3.3
10
30.9
10
953
390
110
5
10
53.6
10
845
560
169
Table 5: 500kHz, 24VIN
VOUT
(V)
L
(μH)
R1
(kΩ)
R2
(kΩ)
R4
(kΩ)
C4
(pF)
RFREQ
(kΩ)
3.3
10
31.6
10
620
390
63.4
5
10
53.6
10
845
390
100
Table 6: 700kHz, 24VIN
VOUT
(V)
L
(μH)
R1
(kΩ)
R2
(kΩ)
R4
(kΩ)
C4
(pF)
RFREQ
(kΩ)
3.3
10
31.6
10
560
390
44.2
5
10
54.9
10
620
390
69.8



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