MIC5319_10 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – 500mA μCap Ultra-Low Dropout High PSRR LDO Regulator

MIC5319
500mA µCap Ultra-Low Dropout
High PSRR LDO Regulator
General Description
The MIC5319 is a high-performance, 500mA LDO
regulator, offering extremely high PSRR and very-low
noise while consuming low ground current.
Ideal for battery-operated applications, the MIC5319
features 1% accuracy, extremely low-dropout voltage
(200mV @ 500mA), and low ground current at light load
(typically 90µA). Equipped with a logic-compatible enable
pin, the MIC5319 can be put into a zero-off-mode current
state, drawing no current when disabled.
The MIC5319 is a µCap design operating with very-small
ceramic output capacitors for stability, thereby reducing
required board space and component cost.
The MIC5319 is available in fixed-output voltages and
adjustable output voltages in the super-compact 2mm x
2mm MLF^® leadless package and thin SOT-23-5 package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Ultra-low dropout voltage 200mV @ 500mA
• Input voltage range: 2.5 to 5.5V
• Stable with ceramic output capacitor
• Low output noise: 40µVrms
• Low quiescent current of 90µA total
• High PSRR, up to 70dB @1kHz
• Fast turn-on-time: 40µs typical
• High-output accuracy:
− ±1.0% initial accuracy
− ±2.0% over temperature
• Thermal-shutdown protection
• Current-limit protection
• Logic-controlled Enable
• Tiny 2mm x 2mm MLF^® package, 500mA continuous
• Thin SOT-23-5 package, 500mA peak
Typical Application
Applications
• Cellular phones
• PDAs
• Fiber optic modules
• Portable electronics
• Notebook PCs
• Audio Codec power supplies
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
May 2010
M9999-052510