LTM8021IV#PBF Linear Technology, LTM8021IV#PBF Datasheet - Page 12

• Manufacturer Part Number: LTM8021IV#PBF
• Description: IC DC/DC UMODULE 500MA 35-LGA
• Manufacturer: Linear Technology
• Series: µModuler
• Type: Point of Load (POL) Non-Isolatedr

Specifications of LTM8021IV#PBF

• Design Resources: LTM8021 Spice Model
• Output: 0.8 ~ 5 V
• Number Of Outputs: 1
• Power (watts): 2.5W
• Mounting Type: Surface Mount
• Voltage - Input: 3 ~ 36 V
• Package / Case: 35-LGA
• 1st Output: 0.8 ~ 5 VDC @ 500mA
• Size / Dimension: 0.44" L x 0.25" W x 0.11" H (11.25mm x 6.25mm x 2.82mm)
• Power (watts) - Rated: 2.5W
• Operating Temperature: -40°C ~ 125°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -

APPLICATIONS INFORMATION
LTM8021
High Temperature Considerations
The die temperature of the LTM8021 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 LTM8021. To estimate the junction temperature, ap-
proximate the power dissipation within the LTM8021 by
applying the typical effi ciency stated in this data sheet to
the desired output power, or, if one has an actual module,
by taking a power measurement. Then, calculate the tem-
perature rise of the LTM8021 junction above the surface
of the printed circuit board by multiplying the module’s
12
IMPEDANCE
24V SUPPLY
ENERGIZED
Figure 5. Ensures Reliable Operation When the LTM8021 is Connected to a Live Supply
LOW
+
+
+
SIMULATES HOT PLUG
CLOSING SWITCH
STRAY
INDUCTANCE
DUE TO 6 FEET
(2 METERS) OF
TWISTED PAIR
+
0.7Ω
0.1μF
I
22μF
AI.EI.
IN
V
IN
4.7μF
4.7μF
4.7μF
LTM8021
LTM8021
LTM8021
(5a)
(5b)
(5c)
power dissipation by the thermal resistance. The actual
thermal resistance of the LTM8021 to the printed circuit
board depends on the layout of the circuit board, but the
thermal resistance given in the Pin Confi guration, which
is based upon a 40.3cm
used a guide.
Finally, be aware that at high ambient temperatures the
internal Schottky diode will have signifi cant leakage current
(see the Typical Performance Characteristics) increasing
the quiescent current of the LTM8021.
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
2
IN
MAY EXCEED
4-layer FR4 PC board, can be
8021 F05
8021fc