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Application Note : LDO Regulators (Linear Regulators)

Low Supply Current Type and High-performance Type

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
High-performance Type High Fast High

Low Supply Current Type LDO Regulator

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.

RP110xxxxC

RP110xxxxC

C Version: Reducing the pull-down constant current to the CE pin.

RP110xxxxB

RP110xxxxB

High-performance Type LDO Regulator

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.

High-performance Type

Standard Type LDO Regulator

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.

Standard Type

VIN
Max.
IOUT
150 mA ~300 mA 400 mA 500 mA ~1 A ~3 A
3.6 V     RP106
RP116
     
5.25 V RP109
RP152 2ch
RP153 2ch
RP100 (~200mA)
RP101
RP114
RP154 2ch
RP105     RP108
6 V         R1170
(~800mA)
R1171
(~2A)
6.5 V         RP131
RP132
 
8 V R1111
R1121
R1130        
10 V RP171 RP170        
16 V         R1190  
24 V       R1500 R1501  
36 V R1516 R1511
R1513
       

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