Datasheet ADP5303 (Analog Devices) - 7

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Data Sheet ADP5303 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS A1 A2 A3 SW PVIN EN ADP5303 B1 B2 B3 PGND AGND SYNC/ MODE
03
C1 C2 C3
0 4- 44
VINOK FB VID
13 Figure 3. Pin Configuration
Table 4. Pin Function Descriptions Pin No. Mnemonic Description
A1 SW Switching Node Output for the Regulator. A2 PVIN Power Input for the Regulator. A3 EN Enable Input for the Regulator. Set this pin to logic low to disable the regulator. B1 PGND Power Ground. B2 AGND Analog Ground. B3 SYNC/MODE Synchronization Input Pin (SYNC). To synchronize the switching frequency of the device to an external clock, connect this pin to an external clock with a frequency from 1.5 MHz to 2.5 MHz. PWM or Hysteresis Mode Selection Pin (MODE). When this pin is logic high, the regulator operates in PWM mode. When this pin is logic low, the regulator operates in hysteresis mode. C1 VINOK Output Power-Good Signal. This open-drain output is the power-good signal for the input voltage. C2 FB Feedback Sensing Input for the Regulator. C3 VID Voltage Configuration Pin. Connect an external resistor (RVID) from this pin to ground to configure the output voltage of the regulator (see Table 5). Rev. A | Page 7 of 21 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode Hysteresis Mode Mode Selection OSCILLATOR AND SYNCHRONIZATION ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE/DISABLE CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY CYCLE OPERATION ACTIVE DISCHARGE VINOK FUNCTION THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE