LTM4606 LINER [Linear Technology], LTM4606 Datasheet - Page 15

• Manufacturer Part Number: LTM4606
• Description: Ultralow EMI 28VIN, 6A DC/DC ?Module
• Manufacturer: LINER [Linear Technology]

with a rating twice the maximum input current needs to be
provided to protect each unit from catastrophic failure.
Radiated EMI Noise
High radiated EMI noise is a disadvantage for switching
regulators by nature. Fast switching turn-on and turn-off
make large di/dt change in the converters, which act as
the radiation sources in most systems. The LTM4606 in-
tegrates the feature to minimize the radiated EMI noise for
applications with low-noise requirements. Optimized gate
driver for the MOSFET and noise cancellation network are
installed inside the LTM4606 to achieve low radiated EMI
noise. Figure 16 shows a typical example for LTM4606 to
meet the Class B of CISPR 22 radiated emission limit.
APPLICATIONS INFORMATION
6
5
4
3
2
1
0
6
5
4
3
2
1
0
70
60
Figure 12. No Heat Sink
12V
12V
12V
24V
24V
24V
Figure 14. No Heat Sink
75
65
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
IN
IN
IN
IN
IN
IN
, 3.3V
, 3.3V
, 3.3V
, 3.3V
, 3.3V
, 3.3V
80
70
OUT
OUT
OUT
OUT
OUT
OUT
, 0LFM
, 200LFM
, 400LFM
, 0LFM
, 200LFM
, 400LFM
85
75
80
90
4606 F12
4606 F14
95
85
Figure 16. Radiated Emission Scan with 12V
CISPR.22 Class B Chase 6141 BiLog, RG-8 1.5 Meters Chase
CPA9231A Horizontal, 3 Meters All Sides, 30MHz to 1000MHz,
RES BW 120kHz, SWP 455ms.
6
5
4
3
2
1
0
6
5
4
3
2
1
0
100
70
60
90
80
70
60
50
40
30
20
10
0
0
Figure 13. BGA Heat Sink
Figure 15. BGA Heat Sink
100
65
12V
12V
12V
24V
24V
24V
75
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
200
IN
IN
IN
IN
IN
IN
, 3.3V
, 3.3V
, 3.3V
, 3.3V
, 3.3V
, 3.3V
70
300
80
FREQUENCY (MHz)
OUT
OUT
OUT
OUT
OUT
OUT
400
75
, 0LFM
, 200LFM
, 400LFM
, 0LFM
, 200LFM
, 400LFM
500
85
600
80
700
90
85
800
4606 G15
4606 F13
900
LTM4606
IN
4606 F16
95
90
to 2.5V
1000
OUT
15
at 6A.
4606f