MIC5245_02 Datasheet, PDF (9/12 Pages) Micrel Semiconductor – 150mA μCap CMOS LDO Regulator

MIC5245
effects on voltage regulators, refer to the Regulator Thermals
section of Micrel’s Designing with Low-Dropout Voltage Regu-
lators handbook.
Fixed Regulator Applications
V_IN
MIC5245-x.xBM5
1
5
2
3
4
V_OUT
1µF
0.01µF
Figure 1. Ultra-Low-Noise Fixed Voltage Application
Figure 1 includes a 0.01µF capacitor for low-noise operation
and shows EN (pin 3) connected to IN (pin 1) for an applica-
tion where enable/shutdown is not required. C_OUT = 1µF
minimum.
Enable
Shutdown
V_IN
MIC5245-x.xBM5
1
5
V_OUT
2
1.0µF
3
4
EN
Micrel
Figure 2. Low-Noise Fixed Voltage Application
Figure 2 is an example of a low-noise configuration where
C_BYP is not required. C_OUT = 1µF minimum.
Dual-Supply Operation
When used in dual supply systems where the regulator load
is returned to a negative supply, the output voltage must be
diode clamped to ground.
August 2002
9
MIC5245