DC1400A Linear Technology, DC1400A Datasheet - Page 20

• Manufacturer Part Number: DC1400A
• Description: BOARD EVAL LTM4608
• Manufacturer: Linear Technology
• Series: LTM®r

Specifications of DC1400A

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V
• Current - Output: 8A
• Voltage - Input: 2.5 ~ 5.5 V
• Regulator Topology: Buck
• Frequency - Switching: 1.5MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LTM4608
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

LTM4608A
APPLICATIONS INFORMATION
Safety Considerations
The LTM4608A modules do not provide isolation from V
to V
fuse with a rating twice the maximum input current needs
to be provided to protect each unit from catastrophic failure.
Layout Checklist/Example
The high integration of LTM4608A makes the PCB board
layout very simple and easy. However, to optimize its
electrical and thermal performance, some layout con-
siderations are still necessary.
• Use large PCB copper areas for high current path,
20
including V
PCB conduction loss and thermal stress.
OUT
. There is no internal fuse. If required, a slow blow
IN
, GND and V
OUT
. It helps to minimize the
C
GND
IN
C
V
IN
IN
Figure 17. Recommended PCB Layout
IN
GND
• Place high frequency ceramic input and output capaci-
• Place a dedicated power ground layer underneath the
• To minimize the via conduction loss and reduce module
• Do not put vias directly on the pads, unless they are
• Use a separated SGND ground copper area for com-
Figure 17 gives a good example of the recommended layout.
tors next to the V
high frequency noise.
unit.
thermal stress, use multiple vias for interconnection
between top layer and other power layers.
capped.
ponents connected to signal pins. Connect the SGND
to GND underneath the unit.
V
C
C
C
GND
4608A F17
OUT
OUT
OUT
OUT
IN
, GND and V
OUT
pins to minimize
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