MIC47150WD TR Micrel Inc, MIC47150WD TR Datasheet - Page 9

• Manufacturer Part Number: MIC47150WD TR
• Description: IC REG LDO 1.5A ADJ TO-252-5
• Manufacturer: Micrel Inc

Specifications of MIC47150WD TR

• Regulator Topology: Positive Adjustable
• Voltage - Output: Adj down to 0.9V
• Voltage - Input: 1.4 ~ 6.5 V
• Voltage - Dropout (typical): 0.28V @ 1.5A
• Number Of Regulators: 1
• Current - Output: 1.5A
• Current - Limit (min): 1.6A
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: DPak, TO-252 (5 leads + tab)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3616-2

Application Information
Adjustable Regulator Design
The MIC47150 allows programming the output down to
0.9V. From the typical application in Figure 1, the output
voltage is set by placing a resistor divider network from
OUT to GND and is determined by the following
equation:
where V
The resistor value between V
should not exceed 10kΩ. Larger values can cause
instability. The resistor values are calculated from the
above equation, resulting in the following:
EVB Layout
The MIC47150 evaluation board layout is shown in
Figures 2 and 3. For customer application boards,
recommended variations include using a static resistor
for R2 in place of the potentiometer as well as the
elimination of all test points and jumper options that are
included on the MIC47150 evaluation board.
Micrel, Inc.
October 2009
OUT
R1
V
OUT
=
is the desired output voltage.
R2
=
0.9
×
⎛
⎜ ⎜
⎝
V
×
0.9
OUT
⎛
⎜
⎝
R2
R1
−
+
1
1
⎞
⎟ ⎟
⎠
⎞
⎟
⎠
OUT
and the adjust pin
9
Figure 3. MIC47150 EVB Bottom Layer
Figure 2. MIC47150 EVB Top Layer
M9999-102309-A
MIC47150