MIC5524 High-Performance 500mA LDO in Thin DFN Package General Description Features 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. 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 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. Typical Application Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com June, 2013 Revision 1.0 Micrel, Inc. MIC5524 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) .......................................... –0.3V to 6V Enable Voltage (VEN). ........................................ –0.3V to VIN (3) Power Dissipation (PD) ........................... Internally Limited Lead Temperature (soldering, 10s) ............................ 260°C Junction Temperature (TJ) ........................ –40°C to +150°C Storage Temperature (Ts) ......................... –65°C to +150°C (4) ESD Rating .................................................................. 3kV Supply Voltage (VIN) ......................................... 2.5V to 5.5V Enable Voltage (VEN) .............................................. 0V to VIN Junction Temperature (TJ) ........................ –40°C to +125°C Junction Thermal Resistance 1mm × 1mm Thin DFN-4 (θJA) ......................... 250°C/W Ordering Information Marking Code Output (5) Voltage Temperature Range MIC5524-1.2YMT C9 1.2V –40°C to +125°C MIC5524-1.8YMT C6 1.8V –40°C to +125°C MIC5524-2.8YMT 4C 2.8V –40°C to +125°C MIC5524-3.0YMT 3C 3.0V –40°C to +125°C MIC5524-3.3YMT C3 3.3V –40°C to +125°C Part Number Notes: 1. Exceeding the absolute maximum rating can damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. 4. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF. 5. Other voltages available. Contact Micrel for details. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. © 2013 Micrel, Incorporated. June, 2013 2 Revision 1.0