Datasheet ADP2325 (Analog Devices) - 8

link to page 8
ADP2325 Data Sheet Pin No. Mnemonic Description
24, 25 SW1 Switch Node for Channel 1. 26, 27 PVIN1 Power Input for Channel 1. These pins are the power inputs for Channel 1 and provide power for the internal regulator. Connect to the input power source and connect a bypass capacitor between PVIN1 and ground. 28 EN1 Enable Pin for Channel 1. An external resistor divider can be used to set the turn-on threshold. When not using the enable pin, connect EN1 to PVIN1. 29 TRK1 Tracking Input for Channel 1. To track a master voltage, connect this pin to a resistor divider from the master voltage. If the tracking function is not used, connect TRK1 to INTVCC. 30 SS1 Soft Start Control for Channel 1. To program the soft start time, connect a capacitor from SS1 to GND. 31 COMP1 Error Amplifier Output for Channel 1. Connect an RC network from COMP1 to GND. Connect COMP1 and COMP2 together for parallel applications. 32 FB1 Feedback Voltage Sense Input for Channel 1. Connect FB1 to a resistor divider from the Channel 1 output voltage, V . OUT1 N/A1 EP Exposed Pad. Solder the exposed pad to an external GND plane. 1 N/A means not applicable. Rev. A | Page 8 of 32 Document Outline Features Applications Typical Application Circuit General Description Revision History Functional Block Diagram Specifications Absolute Maximum Ratings Thermal Resistance Boundary Condition ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode PFM Mode Precision Enable/Shutdown Separate Input Voltages Internal Regulator (INTVCC) Bootstrap Circuitry Low-Side Driver Oscillator Synchronization Soft Start Peak Current-Limit and Short-Circuit Protection Voltage Tracking Coincident Tracking Ratiometric Tracking Parallel Operation Power Good Overvoltage Protection Undervoltage Lockout Thermal Shutdown Applications Information ADIsimPower Design Tool Input Capacitor Selection Output Voltage Setting Voltage Conversion Limitations Current-Limit Setting Inductor Selection Output Capacitor Selection Low-Side Power Device Selection Programming the UVLO Input Compensation Components Design Design Example Output Voltage Setting Current-Limit Setting Frequency Setting Inductor Selection Output Capacitor Selection Low-Side MOSFET Selection Compensation Components Soft Start Time Programming Input Capacitor Selection External Components Recommendations Typical Application Circuits Packaging and Ordering Information Outline Dimensions Ordering Guide