R1155 Datasheet, PDF (12/26 Pages) RICOH electronics devices division – 150 mA 24 V Input High Voltage Regulator

R1155x
NO.EA-270-150702
Equivalent Series Resistance (ESR) vs. Output Current (I_OUT)
It is recommended that a ceramic type capacitor be used for the R1155x. However, other types of capacitors
having lower ESR can also be used. The relation between the output current (IOUT) and the ESR of output
capacitor is shown below.
Measurement Conditions:
・Noise Frequency Band: 10 Hz to 2 MHz
・Measurement Temperature: −40°C to +105°C
・Hatched Area: Noise level is 40 µV (avg.) or below.
・CIN: 0.1 µF
・COUT: 4.7 µF
1000
100
10
1
0.1
0.01
0
25
50
75
100
125
150
Output Current I_OUT (mA)
ESR vs. Output Current
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