Datasheet ADP2370, ADP2371 (Analog Devices) - 7

Data Sheet ADP2370/ADP2371 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS ADP2370/ADP2371 VIN 1 8 PGND FSEL 2 7 SW TOP VIEW EN 3 (Not to 6 PG Scale) SYNC 4 5 FB NOTES 1. THE EXPOSED PAD ON THE BOTTOM OF THE PACKAGE ENHANCES THE THERMAL PERFORMANCE AND IS ELECTRICALLY CONNECTED TO GROUND INSIDE THE PACKAGE. THE EXPOSED PAD MUST BE
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CONNECTED TO THE GROUND PLANE ON THE CIRCUIT BOARD FOR PROPER OPERATION.
09531- Figure 2. Pin Configuration
Table 5. Pin Function Descriptions Pin No. Mnemonic Description
1 VIN Power Input. 2 FSEL Frequency Select. High = 1.2 MHz, low = 600 kHz. 3 EN Enable. Enable input with precision thresholds. 4 SYNC Synchronize. This pin is used to synchronize the device to an external 600 kHz to 1.2 MHz clock or forces PWM mode when it is held high. SYNC held low forces automatic PWM/PSM operation. 5 FB Feedback. This pin provides feedback from the output. 6 PG Power Good. PG is an open-drain output. 7 SW Switch. This pin serves as the connection from the power MOSFETs to the inductor. 8 PGND Power Ground. EPAD Exposed Pad. The exposed pad on the bottom of the package enhances the thermal performance and is electrically connected to ground inside the package. The exposed pad must be connected to the ground plane on the circuit board for proper operation. Rev. D | Page 7 of 32 Document Outline Features Applications Typical Application Circuit General Description Table of Contents Revision History Specifications Recommended Specifications: Capacitors Absolute Maximum Ratings Thermal Data Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Buck Output Theory of Operation PWM Operation PSM Operation Features Descriptions Precision Enable Forced PWM or PWM/PSM Selection Quick Output Discharge (QOD) Function Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit 100% Duty Cycle Synchronizing Power Good Applications Information ADIsimPower Design Tool External Component Selection Selecting the Inductor Output Capacitor Input Capacitor Adjustable Output Voltage Programming Efficiency Power Switch Conduction Losses Inductor Losses Switching Losses Transition Losses Recommended Buck External Components Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Thermal Considerations PCB Layout Considerations Packaging and Ordering Information Outline Dimensions Ordering Guide