link to page 18 ADP2118Data SheetParameterSymbolTest Conditions/CommentsMinTypMaxUnit EN EN Input Rising Threshold VIN = 2.3 V to 5.5 V 1.12 1.2 1.28 V EN Input Hysteresis VIN = 2.3 V to 5.5 V 100 mV EN Pull-Down Resistor 1 MΩ THERMAL Thermal Shutdown Threshold 140 °C Thermal Shutdown Hysteresis 15 °C 1 Specified by the circuit in Figure 45. 2 Pin-to-pin measurements. 3 Guaranteed by design. Rev. E | Page 4 of 24 Document Outline Features Applications General Description Revision History Specifications Absolute Maximum Ratings Thermal Resistance Boundary Conditions ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Functional Block Diagram Theory of Operation Control Scheme PWM Mode Operation PFM Mode Operation Slope Compensation Enable/Shutdown Integrated Soft Start Tracking Oscillator and Synchronization Current Limit and Short-Circuit Protection Overvoltage Protection (OVP) Undervoltage Lockout (UVLO) Thermal Shutdown Power Good Applications Information ADIsimPower™ Design Tool Output Voltage Selection Inductor Selection Output Capacitor Selection Input Capacitor Selection Voltage Tracking Typical Application Circuits Outline Dimensions Ordering Guide