MP172– NON-ISOLATED OFF-LINE REGULATOR
APPLICATION INFORMATION
Table 1—Common topologies using MP172
Topology
Circuit Schematic
Features
1. No isolation
DRAIN
VCC
5
4
1
2
3
2. Positive output
3. Low cost
FB
MP172
4. Direct feedback
High-side
buck
SOURCE
SOURCE
Vin
Vo
VCC
DRAIN
1. No isolation
2. Negative output
3. Low cost
1
5
4
FB
2
3
MP172
4. Direct feedback
High-side
SOURCE
SOURCE
buck-boost
Vin
Vo
1. No isolation
2. Positive output
3. Low cost
VCC
5
1
DRAIN
4. Direct feedback
FB
Boost
Vin
2
3
MP172
Vo
SOURCE
SOURCE
4
1. Isolation
T
2. Positive output
3. Low cost
*
V
in
*
4. Indirect feedback
Flyback
VCC
1
DRAIN
5
FB
2
MP172
*
SOURCE
SOURCE
4
3
MP172 Rev. 1.0
9/30/2015
www.MonolithicPower.com
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