LM5145RGYR Detailed explanation of pin function specifications and circuit principle instructions
The component "LM5145RGYR" appears to be part of the Texas Instruments (TI) family of voltage regulators. Specifically, the LM5145 is a high-efficiency synchronous buck converter, and "RGYR" refers to its QFN-48 package, which is a 48-pin surface-mount package commonly used in various Power management devices. Below, I'll provide a detailed breakdown of the pin functions, circuit principles, and specifications related to this component.
Package and Pinout for LM5145RGYR
Package Type: QFN-48 (48 pins) Description: A high-performance, integrated synchronous buck converter designed to deliver low output voltage and high efficiency in various power applications.Here’s the detailed function of each pin (listed for the QFN-48 package, with a total of 48 pins):
Pin # Pin Name Pin Function Description 1 VDD Power supply input pin for the controller. 2 VDD_BIAS Bias voltage input for internal logic and control. 3 VIN Input voltage pin to supply the power to the regulator. 4 SW Switch node connected to the inductor and power transistor s. 5 PGND Power ground pin, connected to the negative side of the inductor and the switch transistor. 6 AGND Analog ground for low-level control circuitry. 7 BOOT Boost capacitor connection for the high-side FET gate driver. 8 SS Soft-start pin to control the output voltage rise time. 9 COMP Compensation pin for the control loop, typically used to connect a resistor-capacitor network for loop stability. 10 PGOOD Power good output, indicating if the output voltage is within the correct range. 11 VOUT1 Output voltage pin for the first output rail, used in dual-output configurations. 12 VOUT2 Output voltage pin for the second output rail (if applicable). 13 SYNC Synchronization input for timing, can synchronize the switching frequency to an external clock. 14 FB1 Feedback pin for the first output voltage loop. 15 FB2 Feedback pin for the second output voltage loop (if applicable). 16 EN Enable pin to control the device's operation (turn on/off). 17 VDD_DROPOUT Voltage dropout pin used for sensing dropout events. 18 CPOUT Pin for connecting a capacitor to improve the output voltage stability. 19 REF Reference voltage output pin for external circuitry, typically used for precise regulation. 20 UVLO Under-voltage lockout pin to monitor input voltage and prevent operation under low voltage conditions. 21 N/C No connection, pin not used in the device. 22 N/C No connection, pin not used in the device. 23 N/C No connection, pin not used in the device. 24 N/C No connection, pin not used in the device. 25 N/C No connection, pin not used in the device. 26 N/C No connection, pin not used in the device. 27 N/C No connection, pin not used in the device. 28 N/C No connection, pin not used in the device. 29 N/C No connection, pin not used in the device. 30 N/C No connection, pin not used in the device. 31 N/C No connection, pin not used in the device. 32 N/C No connection, pin not used in the device. 33 N/C No connection, pin not used in the device. 34 N/C No connection, pin not used in the device. 35 N/C No connection, pin not used in the device. 36 N/C No connection, pin not used in the device. 37 N/C No connection, pin not used in the device. 38 N/C No connection, pin not used in the device. 39 N/C No connection, pin not used in the device. 40 N/C No connection, pin not used in the device. 41 N/C No connection, pin not used in the device. 42 N/C No connection, pin not used in the device. 43 N/C No connection, pin not used in the device. 44 N/C No connection, pin not used in the device. 45 N/C No connection, pin not used in the device. 46 N/C No connection, pin not used in the device. 47 N/C No connection, pin not used in the device.