Richtek has a large portfolio of LDOs (linear regulator) and DC/DC converters/controllers. The below table below shows a quick view on general selection criteria for LDO and DC/DC switching converter products.
The first step of design considerations is the input to output voltage difference (VIN-VOUT).
Specific application requirements like efficiency, thermal limits, noise, complexity and cost need to be taken into consideration in order to select an optimal power solution.
The table below provides a quick view on the basic criteria for selecting LDO, Buck , Boost or Buck-boost
VIN, VOUT Condition | Additional Condition | Suitable Topology | Advantage | Disadvantage |
---|---|---|---|---|
VIN > VOUT |
|
LDO |
|
|
|
Buck |
|
|
|
VIN < VOUT | Boost |
|
|
|
VIN < > VOUT |
|
Buck-boost |
|
|