MIC5209Functional DiagramsLOW-NOISEFIXED REGULATOR(SOT-223 VERSION ONLY) V IN OUT V IN OUT COUT ~2.0V – 2.1V EN –40ºC BANDGAP REFERENCE CURRENT-LIMIT THERMAL SHUTDOWN MIC5209-x.xYS GND ULTRA-LOW-NOISEFIXED REGULATOR V IN OUT V IN OUT COUT BYP CBYP (OPTIONAL) BANDGAP REFERENCE EN CURRENT-LIMIT THERMAL SHUTDOWN MIC5209-x.xYM/U GND ULTRA-LOW-NOISEADJUSTABLE REGULATOR OUT V IN V IN OUT COUT ADJ R1 CBYP R2 BANDGAP (OPTIONAL) REFERENCE EN CURRENT-LIMIT THERMAL SHUTDOWN MIC5209YM/U (ADJUSTABLE) GND 2017 - 2022 Microchip Technology Inc. and its subsidiaries DS20005720B-page 3 Document Outline 1.0 Electrical Characteristics 2.0 Typical Performance Curves 3.0 Pin Descriptions 4.0 Applications Information 4.1 Enable/Shutdown 4.2 Input Capacitor 4.3 Output Capacitor 4.4 No-Load Stability 4.5 Reference Bypass Capacitor 4.6 Thermal Considerations 4.7 Low-Voltage Operation 4.8 Fixed Regulator Applications 4.9 Adjustable Regulator Applications 4.10 Slot-1 Power Supply 5.0 Packaging Information 5.1 Package Marking Information Appendix A: Revision History Product Identification System Worldwide Sales and Service