ltm8031 Linear Technology Corporation, ltm8031 Datasheet - Page 14

• Manufacturer Part Number: ltm8031
• Description: Ultralow Noise Emc 36v, 1a Dc/dc ?module Regulator
• Manufacturer: Linear Technology Corporation

APPLICATIONS INFORMATION
LTM8031
correlation. Bear in mind that the actual thermal resistance
of the LTM8031 to the printed circuit board depends upon
the design of the circuit board. The die temperature of
the LTM8031 must be lower than the maximum rating of
125°C, so care should be taken in the layout of the circuit
to ensure good heat sinking of the LTM8031.
The bulk of the heat fl ow out of the LTM8031 is through the
bottom of the module and the LGA pads into the printed
14
IMPEDANCE
24V SUPPLY
ENERGIZED
LOW
Figure 4. A Well Chosen Input Network Prevents Input Voltage Overshoot and Ensures
Reliable Operation When the LTM8031 is Hot-Plugged to a Live Supply
+
+
+
SIMULATES HOT PLUG
CLOSING SWITCH
AI.EI.
0.1μF
22μF
35V
STRAY
INDUCTANCE
DUE TO 6 FEET
(2 METERS) OF
TWISTED PAIR
+
0.7Ω
I
IN
4.7μF
4.7μF
4.7μF
V
V
FIN
V
IN
IN
IN
LTM8031
LTM8031
LTM8031
(4a)
(4b)
(4c)
circuit board. Consequently a poor printed circuit board
design can cause excessive heating, resulting in impaired
performance or reliability. Please refer to the PCB Layout
section for printed circuit board design suggestions.
Finally, be aware that at high ambient temperatures the
internal Schottky diode will have signifi cant leakage current
increasing the quiescent current of the LTM8031.
20V/DIV
10A/DIV
20V/DIV
10A/DIV
20V/DIV
10A/DIV
V
V
V
I
I
I
IN
IN
IN
IN
IN
IN
DANGER
RINGING V
ABSOLUTE MAXIMUM RATING
20μs/DIV
20μs/DIV
20μs/DIV
IN
MAY EXCEED
8031 F04
8031fa