Skip to main content Skip to first level navigation

RICOH imagine. change.

RICOH ELECTRONIC DEVICES CO., LTD.

Skip to main content First level navigation Menu
Breadcrumbs
Main content

Voltage Regulator Application Note

Various protection circuits are built into Ricoh voltage regulators.

Fold-back Protection Circuit

The Fold-back Protection Circuit shown in the blue ellipse as "Current Limit" protects the voltage regulator from damage by overcurrent if the output pin (VOUT) and the ground pin (GND) are shorted.
It consists of the overcurrent protection circuit and the short current protection circuit.
In the typical characteristics, the overcurrent protection activities are shown by the blue line on the "Output Voltage vs. Output Current" graph, and the short current protection activities are shown by the blue circle on the same graph.
The limiting current value of the overcurrent protection is not defined in the datasheet. Please refer to the graph of the typical characteristics.
The limiting current value of the short current protection is defined in the datasheet as short current limit (lSC). In Ricoh voltage regulators, this is usually set within a range of about 30mA to 250mA.

R1131x26xx

Fold-back Protection Circuit Included

The Fold-back Protection Circuit is built in all voltage regulators except for Rx5RL Series.

Inquiry about products

Technical Support

Inquiries (SSL Form)

Inquiry about business

Purchase, Request for Samples and Documents

Distributors

Sample Online

Online Distributors