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MP28255 датащи(PDF) 5 Page - Monolithic Power Systems

номер детали MP28255
подробное описание детали  21V, 4A, 500kHz Synchronous Step-down Converter
PDF  14 Pages
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производитель  MPS [Monolithic Power Systems]
домашняя страница  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP28255 датащи(HTML) 5 Page - Monolithic Power Systems

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MP28255 – 4A, 21V, SYNCHRONOUS STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
MP28255 Rev. 1.01
www.MonolithicPower.com
5
3/11/2011
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 12V, VOUT = 1.2V, L=1.8uH, TA = +25ºC, unless otherwise noted.
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
Load Regulation
INPUT VOLTAGE (V)
Enabled Supply Current vs.
Input Voltage
Operating Range
Vcc Regulator Line Regulation
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
500
550
600
650
700
750
800
850
900
950
1000
DUTY CYCLE (%)
Line Regulation
OUTPUT CURRENT (A)
INPUT VOLTAGE (V)
Case Temperature Rise vs.
Output Current
INPUT CURRENT (V)
OUTPUT CURRENT (A)
0
5
10
15
20
25
VFB=1V
-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
0
5
10
15
20
25
Disabled Supply Current vs.
Input Voltage
0
5
10
15
20
25
0.1
1
10
100
0
5
10
15
20
25
01234
VIN=12V
VIN=4.5V
VIN=21V
0
5
10
15
20
25
0
5
10
15
20
25
01
2
3
4
5
VEN=0V
3.5
4
4.5
5
5.5
6
0
2
4
6
8
0
20
40
60
80
100
Current Limit vs. Duty Cycle
Minimum on time Limit
DmaxLimit
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
IO=0A
IO=2A
IO=4A



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