MIC2215_07 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Triple High PSRR, Low Noise μCap LDO

MIC2215
Triple High PSRR, Low Noise µCap LDO
General Description
The MIC2215 is a high performance, triple LDO voltage
regulator, with each regulator capable of providing 250mA
continuous output current.
Ideal for battery operated applications, the MIC2215 offers
1% initial accuracy, extremely low dropout voltage (100mV
@ 150mA), and low ground current at light load (typically
110µA per regulator). Equipped with a noise bypass pin
and featuring very high power supply ripple rejection
(PSRR) of up to 80dB, the MIC2215 provides the lowest
noise and highest efficiency solution for RF applications in
portable electronics such as cellular phones and wireless
LAN applications.
Equipped with TTL logic-compatible enable pins, each of
the regulators in the MIC2215 can be put into a zero
current off mode where the supply current is much less
than 1µA when all the regulators are disabled. The
MIC2215 is a µCap design, which enables a stable output
with small ceramic output capacitors, reducing both cost
and required board space for output bypassing.
The MIC2215 is available in the miniature 16-pin,
(4mm×4mm) MLF^® package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Input voltage range: +2.25V to +5.5V
• 70dB PSRR
• Stable with ceramic output capacitor
• High output accuracy:
– ±1.0% initial accuracy
– ±2.0% over temperature
• Low dropout voltage of 100mV@150mA
• Low quiescent current:110µA per regulator
• Fast turn-on time:30µs
• Zero off-mode current
• Thermal shutdown protection
• Current-limit protection
• Tiny 16-pin (4mm × 4mm) MLF^® package
Applications
• Cellular phones
• PCs and peripherals
• Wireless LAN cards
• PDAs
• GPS
___________________________________________________________________________________________________________
Typical Application
OFF ON
OFF ON
OFF ON
C_IN = 1µF
Ceramic
MIC2215-xxx_ML
VIN1
VOUT1
VIN2
VOUT2
VIN3
VOUT3
EN1
EN2
EN3
CBYP
GND
Rx Chain
Tx Chain
Synth/TCXO/VCO
C_OUT = 1µF
Ceramic
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
January 2007
1
M9999-011207