MIC5307 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – 300mA Micropower uCap Baseband LDO

MIC5307
300mA Micropower µCap
Baseband LDO
General Description
The MIC5307 is a micropower, µCap low dropout regulator
designed for optimal performance where smaller packages
are required. It is capable of sourcing 300mA of output
current while only drawing 20µA of operating current. This
high performance LDO offers fast transient response and
good PSRR while consuming a minimum of current.
Ideal for battery operated applications; the MIC5307 offers
1% initial accuracy, extremely low dropout voltage and is
equipped with a TTL logic compatible enable pin. The
MIC5307 can be put into a zero-off-mode current state,
drawing no current when disabled.
The MIC5307 is a µCap design, operating with very small
ceramic output capacitors for stability, reducing required
board space and component cost.
The MIC5307 is available in fixed output voltages in the
Thin SOT23-5 package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Input voltage range: 2.4V to 5.5V
• Ultra-low IQ: Only 20µA operating current
• Stable with ceramic output capacitor
• Low dropout voltage of 120mV @ 300mA
• High output accuracy
– ±1.0% initial accuracy
– ±2.0% over temperature
• Thermal Shutdown Protection
• Current Limit Protection
Applications
• Digital Logic Power Supply
• Stand-by power supply
• Cellular phones
• PDAs
• Portable electronics
• Notebook PCs
Typical Application
1µF
MIC5307
VIN VOUT
EN
GND
2.2µF
Ground Pin Current
vs. Temperature
26
24
22
300mA
20
18
100µA
16
14
12
10
8
6
V_IN = V_OUT + 1V
4
V_OUT = 2.8V
2
C_OUT = 2.2µF
0
20 40 60 80
TEMPERATURE (°C)
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
October 2006
1
M9999-102706-A