LT1912EMSE#PBF Linear Technology, LT1912EMSE#PBF Datasheet - Page 17

• Manufacturer Part Number: LT1912EMSE#PBF
• Description: IC, STEP-DOWN REGULATOR, MSOP-10
• Manufacturer: Linear Technology

Specifications of LT1912EMSE#PBF

• Primary Input Voltage: 36V
• No. Of Outputs: 1
• Output Voltage: 20V
• Output Current: 2A
• No. Of Pins: 10
• Operating Temperature Range: -40°C To +125°C
• Supply Voltage Range: 3.6V To 36V
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIONS INFORMATION
125°C. When operating at high ambient temperatures, the
maximum load current should be derated as the ambient
temperature approaches 125°C.
Power dissipation within the LT1912 can be estimated by
calculating the total power loss from an efficiency measure-
ment and subtracting the catch diode loss and inductor
loss. The die temperature is calculated by multiplying the
LT1912 power dissipation by the thermal resistance from
junction to ambient.
24V SUPPLY
IMPEDANCE
ENERGIZED
LOW
+
+
+
Figure 9. A Well Chosen Input Network Prevents Input Voltage Overshoot and
Ensures Reliable Operation when the LT1912 is Connected 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
+
0.7
I
IN
V
IN
4.7µF
4.7µF
4.7µF
LT1912
LT1912
LT1912
(9a)
(9b)
(9c)
Other Linear Technology Publications
Application Notes 19, 35 and 44 contain more detailed
descriptions and design information for buck regulators
and other switching regulators. The LT1376 data sheet
has a more extensive discussion of output ripple, loop
compensation and stability testing. Design Note 100
shows how to generate a bipolar output supply using a
buck regulator.
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
1912 F09
LT1912
17
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