Application Note : LDO Regulators (Linear Regulators)
Ricoh's LDO regulators can be classified in three types by performance; a Low Supply Current Type, a High-performance Type, and the Standard Type of average specifications.
The Low Supply Current Type is used for the performance by the reduction of the supply current during operation.
The High-performance Type is used for the superior performance during operation (low noise and fast transient response).
A Standard Type is an average product of performance and supply current.
Ricoh is preparing many variations, in order to respond to a user's request.
|Supply Current||Transient Response||Ripple Rejection|
|Low Supply Current Type||Ultra low||Slow||Low|
The Low Supply Current Type LDO Regulator is used for applications which are always operating on for a long time, such as a standby mode of mobile phone.
Its supply current is from 1 µA to several µA. The C version has a minimum supply current since the CE pin and belonging internal CE circuit are not present.
C Version: Reducing the pull-down constant current to the CE pin.
The High-performance Type LDO Regulator is a product with high ripple rejection ratio (low noise), low output noise, sufficient load regulation and high load transient response.
The Standard Type LDO Regulator has specifications which can be used for many applications. There are many variations of this type between Low Supply Current Type and High-performance Type LDO Regulator.