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LTM4644 Datasheet(PDF) 11 Page - Analog Devices

Part # LTM4644
Description  Quad 40VIN Silent Switcher 關Module Regulator with Configurable 1.2A Output Array
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTM4644 Datasheet(HTML) 11 Page - Analog Devices

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LTM8051
11
Rev. 0
For more information www.analog.com
Output Noise Spectrum
DC2860A, 100kHz Span
VIN = 12V, VOUT = 3.3V
IOUT = 1.2A, fSW = 1.2MHz
Output Voltage Ripple
DC2860A Demo Board
VIN = 12V, VOUT = 3.3V
Output Noise Spectrum
DC2860A, 100MHz Span
VIN = 12V, VOUT = 3.3V
IOUT = 1.2A, fSW = 1.2MHz
CISPR25 Radiated Emission
with Class 5 Peak Limit
DC2860A Demo Board,
VIN = 14V, VOUT = 3.3V
Four Channels Paralleled,
IOUT = 4.8A, fSW = 2 MHz
CISPR22 Class B Emissions
DC2860A Demo Board
VINn = 12V, IOUTn = 1.2A
5VOUT1, 3.3VOUT2, 2.5VOUT3, 1.8VOUT4
Spread Spectrum On, No EMI Filter
Output Noise Spectrum
DC2860A, 500MHz Span
VIN = 12V, VOUT = 3.3V
IOUT = 1.2A, fSW = 1.2MHz
TA = 25°C, operating per Table 1,unless otherwise noted.
TYPICAL PERFORMANCE CHARACTERISTICS
FREQUENCY (kHz)
10 20 30 40 50 60 70 80 90 100
–20
–10
0
10
20
30
40
50
60
70
80
90
100
IOUT = 1.2A, fSW = 1.2MHz
VIN = 12V, VOUT = 3.3V
DC2860A, 100kHz Span
Output Noise Sprectrum
8051 G56
FREQUENCY (MHz)
0
1
2
3
4
5
6
7
8
9 10
–20
–10
0
10
20
30
40
50
60
70
80
90
100
IOUT = 1.2A, fSW = 1.2MHz
VIN = 12V, VOUT = 3.3V
DC2860A, 10MHz Span
Output Noise Sprectrum
8051 G57
FREQUENCY (MHz)
0
100
200
300
400
500
–20
–10
0
10
20
30
40
50
60
70
80
90
100
IOUT = 1.2A, fSW = 1.2MHz
VIN = 12V, VOUT = 3.3V
DC2860A, 500MHz Span
Output Noise Sprectrum
8051 G58
HORIZONTAL
VERTICAL
CLASS B 3METER RADIATED LIMIT
FREQUENCY (MHz)
0
200
400
600
800
1000
–10
0
10
20
30
40
50
60
70
Spread Spectrum On, No EMI Filter
5VOUT1, 3.3VOUT2, 2.5VOUT3, 1.8VOUT4
VINn = 12V, IOUTn = 1.2A
DC2860A Demo Board
CISPR22 Class B Emissions
8051 G59
CLASS 5 PEAK LIMIT
Spread Spectrum Mode
Fixed Frequency Mode
Noise Floor
FREQUENCY (MHz)
0
200
400
600
800
1000
0
5
10
15
20
25
30
35
40
45
50
Four Channels Paralleled, IOUT = 4.8A, fSW = 2MHz
DC2860A Demo Board, VIN = 14V, VOUT = 3.3V
CISPR25 Radiated Emission with Class 5 Peak Limit
8051 G60
500ns/DIV
2mV/DIV
AC COUPLED
8051 G55



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