MIC5524 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – High-Performance 500mA LDO

MIC5524
High-Performance 500mA LDO
in Thin DFN Package
General Description
The MIC5524 is a low-power, µCap, low dropout regulator
designed for optimal performance in a very-small footprint.
It is capable of sourcing 500mA of output current and only
draws 38µA of operating current to do so. The MIC5524
includes an auto-discharge feature on the output that is
activated when the enable pin is low and it has an internal
pull down resistor on the enable pin that will disable the
output when the enable pin is left floating, this is ideal for
applications where the control signal is floating during
processor boot up.
This high-performance LDO offers fast transient response
and good PSRR in a 1mm × 1mm Thin (0.4mm ht.) DFN
package.
Ideal for battery-operated applications, the MIC5524 offers
2% accuracy, extremely low dropout voltage (260mV @
500mA), and can regulate output voltages down to 1.0V.
Equipped with a TTL logic-compatible enable pin, the
MIC5524 can be put into a zero-off-mode current state,
drawing no current when disabled.
The MIC5524 is a µCap design, operating with very small
ceramic output capacitors for stability, reducing required
board space and component cost for space-critical
applications. The MIC5524 has an operating junction
temperature range of –40°C to 125°C.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• Input voltage range: 2.5V to 5.5V
• Fixed output voltages down to 1.0V
• 500mA guaranteed output current
• High output initial accuracy (±1%)
• High PSRR 80dB
• Low quiescent current 38µA
• Stable with 2.2µF ceramic output capacitors
• Low dropout voltage 260mV @ 500mA
• Auto discharge and internal enable pulldown
• Thermal-shutdown and current-limit protection
• 4-pin 1mm x 1mm Thin DFN package
Applications
• Portable communication equipment
• DSC, GPS, PMP, and PDAs
• Portable medical devices
• 5V POL applications
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
May 15, 2013
Revision 1.0