EC8841

50mA Ultra-Low Quiescent Current LDO

Linear Regulator

Page 5 of 12

3I03N Rev. P001

APPLICATION CIRCUITS

Current Boost Circuit

The figure below shows a boost circuit for increasing

the output current. Output current 60mA or more can be

obtained by this circuit.

Short-Circuit protection of Tr1 can be implemented

by adding the sense resistor RS and the PNP

transistor Tr2 as shown below.

The current limit of the protection circuit is:

Voltage Boost Circuit

If the output voltage you need is greater than 5.0V,

the circuit in the figure below will increase output

voltages easily

The output voltage is obtained by:

quiescent current, the resistor values, R1 and R2,

can be set as large as several hundreds kΩ to

lower the power consumption of the whole system.

Constant Current Source

The EC8841 Series can be used as a constant

current source within allowable current limit.

The output current is obtained by:

Dual Supply

A dual supply can be constructed with two EC8841

series as show in the figure below. This circuit

provides two outputs (5V and 8V) with the EC884130 and

the EC884150. As the resistance R lets the quiescent

current of IC1 pass. R is unnece-ssary if the minimum

output current of IC2 is more than the IC1 quiescent