MIC5325 Low V /V 400mA ULDO IN OUT with Ultra-Low IQ General Description Features The MIC5325 is a high-performance, Cap, low-dropout Wide-input voltage range: 1.7V to 5.5V regulator, offering ultra-low operating current while Stable with 1F ceramic output capacitor maintaining very fast transient response. The MIC5325 Ultra-low-dropout voltage ULDO 110mV 400mA can source up to 400mA of output current and allows a low 2% voltage accuracy over temperature input supply voltage source to increase system efficiency. Bias supply voltage range: 2.5V to 5.5V Ideal for battery operated applications the MIC5325 offers high accuracy, extremely low dropout voltage, and low Ultra-low ground current 35A typical ground current at all load conditions. The MIC5325 can 400mA maximum output current per LDO also be put into a zero-off-mode current state, drawing Very fast transient response virtually no current when disabled. Thermal-shutdown and current-limit protection The MIC5325 is available in fixed-output voltages in the Tiny 6-pin 2mm x 2mm Thin MLF package 6-pin 2mm x 2mm Thin MLF leadless package. Data sheets and support documentation can be found on Micrels web site at www.micrel.com. Applications Low-power handheld devices Portable electronics GPS receivers Post regulator Typical Application ULDO is a trademark of Micrel, Inc MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5325 Ordering Information Output Part Number Marking Code Temperature Range Package Lead Finish Voltage MIC5325-1.2YMT QG4 1.2V 40C to +125C 6-Pin 2mm x 2mm Thin MLF Pb-Free MIC5325-1.5YMT QGF 1.5V 40C to +125C 6-Pin 2mm x 2mm Thin MLF Pb-Free MIC5325-1.8YMT QGG 1.8V 40C to +125C 6-Pin 2mm x 2mm Thin MLF Pb-Free MIC5325-3.6YMT QGV 3.6V 40C to +125C 6-Pin 2mm x 2mm Thin MLF Pb-Free Notes: 1. Other voltages available. Contact Micrel for details. 2. = Pin 1 identifier. Pin Configuration 6-Pin 2mm x 2mm Thin MLF (MT) Pin Description Pin Pin Name Pin Function Number 1 VBIAS Bias Input Voltage. 2 GND Ground 3 IN Power Input for LDO. 4 OUT Output of regulator. 5 BYP Bypass: Connect a capacitor to ground to reduce noise and reduce ripple rejection. 6 EN Enable Input: Active High Input. Logic High = On Logic Low = Off. Do not leave floating. M9999-030811-C March 2011 2