Datasheet ADP2387 (Analog Devices) - 3

Data Sheet ADP2387 FUNCTIONAL BLOCK DIAGRAM VREG CLK BIAS AND DRIVER PVIN REGULATOR RT OSC SLOPE RAMP UVLO EN EN_BUF BOOST 1.17V REGULATOR 1µA 4µA A OCP V CS I_MAX ILIM THRESHOLD – HICCUP SETTING OCP MODE + BST SLOPE RAMP Σ NFET DRIVER COMP 0.6V SW + + ISS CMP CONTROL SS + AMP – LOGIC AND MOSFET VREG DRIVER WITH FB – ANTICROSS NFET PROTECTION DRIVER OVP 0.7V PGND – CLK NEG CURRENT + CMP + – VI_NEG – 0.54V + PGOOD DEGLITCH ADP2387 GND
003 12643- Figure 3. Functional Block Diagram Rev. C | Page 3 of 25 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PRECISION ENABLE/SHUTDOWN INTERNAL REGULATOR (VREG) BOOTSTRAP CIRCUITRY OSCILLATOR SOFT START POWER GOOD PEAK CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTION OVERVOLTAGE PROTECTION (OVP) UNDERVOLTAGE LOCKOUT (UVLO) THERMAL SHUTDOWN APPLICATIONS INFORMATION INPUT CAPACITOR SELECTION OUTPUT VOLTAGE SETTING VOLTAGE CONVERSION LIMITATIONS INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION PROGRAMMING INPUT VOLTAGE UVLO COMPENSATION DESIGN ADIsimPower DESIGN TOOL DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING CURRENT-LIMIT THRESHOLD SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION RECOMMENDED EXTERNAL COMPONENTS CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATIONS CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE