Datasheet ADP5300 (Analog Devices) - 7

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Data Sheet ADP5300 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS EN 1 10 PVIN STOP 2 9 SW ADP5300 SYNC/MODE 3 TOP VIEW 8 PGND (Not to Scale) VID 4 7 AGND FB 5 6 VOUTOK NOTES 1. THE EXPOSED PAD MUST BE SOLDERED TO A
3 00
LARGE EXTERNAL COPPER GROUND PLANE
6-
UNDERNEATH THE IC FOR THERMAL DISSIPATION.
36 13 Figure 3. Pin Configuration
Table 4. Pin Function Descriptions Pin No. Mnemonic Description
1 EN Enable Input for the Regulator. Set to logic low to disable the regulator. 2 STOP Stop Switching Input Signal. When this pin is logic high, the regulator stops the regulator switching. When this pin is logic low, the regulator resumes the regulator switching. 3 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. 4 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). 5 FB Feedback Sensing Input for the Regulator. 6 VOUTOK Output Power-Good Signal. This open-drain output is the power-good signal for the output voltage. 7 AGND Analog Ground. 8 PGND Power Ground. 9 SW Switching Node Output for the Regulator. 10 PVIN Power Input for the Regulator. EPAD Exposed Pad. The exposed pad must be soldered to a large external copper ground plane underneath the IC for thermal dissipation. 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 OSILLATOR 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 OPERATION ACTIVE DISCHARGE VOUTOK FUNCTION STOP SWITCHING 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 CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE