R1170 Datasheet, PDF (20/22 Pages) RICOH electronics devices division – 800mA LDO REGULATOR

R1170x
12) Stable Area (Topt=25°C, VIN = Set Output Voltage+1V, CIN = Ceramic 10μF)
VIN
Ceramic
Capacitor
CE
VOUT
R1170xxxxB
Ceramic
Capacitor
VIN
GND
ESR
IOUT
S.A.
Spectrum
Analyzer
As an output capacitor for this IC, Ceramic capacitor is recommendable. However, other low ESR type
capacitor can be used with this IC.
For your reference, noise level is tested with the circuit as shown above, and if the noise level is 40μV or less
than 40μV, the ESR values are plotted as stable area. Upper limit is described in the next four graphs, or ESR vs.
Output Current. (Hatched area is the stable area.)
R1170x151B
COUT=Ceramic 10μF
100
f=400Hz
f=1kHz
10
f=10kHz
1
R1170x151B
COUT=Ceramic 4.7μF
100
10
1
0.1
0
100
200
400
600
800
Output Current IOUT(mA)
R1170x301B
COUT=Ceramic 10μF
0.1
0
100
200
400
600
800
Output Current IOUT(mA)
R1170x301B
COUT=Ceramic 4.7μF
10
10
1
1
0.1
0
200
400
600
800
Output Current IOUT(mA)
20
0.1
0
200
400
600
800
Output Current IOUT(mA)