RP111H331B datasheet(8/44 Pages) RICOH

Part #	RP111H331B

Description	Good Transient Response Low Voltage 500mA LDO

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Manufacturer	RICOH [RICOH electronics devices division]

Direct Link	http://www.ricoh.com

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RP111x

NO.EA-241-150204

8

TYPICAL APPLICATIONS for Adjustable Output Voltage Type

VOUT

C1

RP111x series

VDD

VOUT

GND

C2

CE

VFB

R1

R2

Please set 3.6V or less for the Adjustable Output Voltage Type. Also, please use 16k

 or less for R2 resistor.

Phase Compensation

Similar to the Fixed Output Voltage Type, Phase compensation is made for the Adjustable Output Voltage Type

for securing stable operation even if the load current is varied. For this purpose, use a 4.7

F or more capacitor

C2 between VOUT pin and GND pin, and as close as possible to the pins.

PCB Layout

Make VDD and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.

Connect a capacitor C1 with a capacitance value as much as 1.0

F or more between VDD and GND pin, and as

close as possible to the pins.

Transient Response

When using the Adjustable Output Voltage Type, the transient response could be affected by the external

resistors. Evaluate the circuit taking the actual conditions of use into account.

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