MIC2215 Datasheet, PDF (8/11 Pages) Micrel Semiconductor – Tirple High PSRR, Low Noise uCap LDO

MIC2215
Functional Diagram
VIN1
EN1
VIN2
EN2
VIN3
EN3
GND
Current
Limit
Error
Amp
Current
Limit
Error
Amp
Current
Limit
Error
Amp
VOUT1
VIN1
EN1
ADJ1
VOUT2
VIN2
EN2
ADJ2
VOUT3
VIN3
EN3
ADJ3
GND
Micrel
Current
Limit
Error
Amp
Current
Limit
Error
Amp
Current
Limit
Error
Amp
VOUT1
VOUT2
VOUT3
Thermal
Limit
V_REF
Quick-
Start
BYP
MIC2215 Block Diagram
(Adjustable)
Thermal
Limit
V_REF
Quick-
Start
BYP
MIC2215 Block Diagram
(Fixed)
General Description
The MIC2215 is a triple, low noise CMOS LDO. Designed
specifically for noise-critical applications in handheld or bat-
tery-powered devices, the MIC2215 comes equipped with a
noise reduction feature to filter the output noise via an
external capacitor. Other features of the MIC2215 include a
separate logic compatible enable pin for each channel,
current limit, thermal shutdown, and ultra-fast transient re-
sponse, all within a small MLF™ package.
The MIC2215 is specifically designed to work with low-ESR
ceramic capacitors, reducing the amount of board space
necessary for power applications, which is critical in hand-
held wireless devices.
M9999-042704
8
April 2004