The part number "TPS54620RHLR" is from Texas Instruments. This is a step-down DC/DC regulator, typically used for Power supply systems, offering efficient voltage regulation.
Package and Pin Functionality:
Package Type: The package for this part number is HTSSOP-20, which stands for Hot Temperature Solderable Small Outline Package with 20 pins. Total Number of Pins: This part has 20 pins.Pinout and Functionality Description for TPS54620RHLR:
Below is the pinout with a detailed description for each pin:
Pin Number Pin Name Pin Type Description 1 VIN Input Voltage The input supply pin for the TPS54620. It requires a voltage between 4.5V and 17V for proper operation. Connect to the input voltage source. 2 PGND Power Ground The power ground pin. Connect to the ground of the system power. 3 VOUT Output Voltage The output voltage pin. Connect the output load to this pin to provide regulated voltage from the DC/DC converter. 4 FREQ Frequency Control External resistor or capacitor to set the switching frequency. 5 EN Enable Enable pin. When this pin is high (typically > 2.5V), the device operates normally. When it is low (< 0.4V), the device is disabled and no output is provided. 6 SS Soft Start Soft-start pin. Connect a capacitor to this pin to control the rise time of the output voltage during startup. 7 RT Resistor to Set Frequency A resistor is connected to this pin to adjust the frequency of the internal oscillator for proper operation. 8 NC No Connection This pin is not connected to any internal circuitry and is typically left unconnected in the circuit. 9 VDD Power Supply Internal power supply pin for the controller. This should be connected to the same source as the VIN pin. 10 VSS Ground Ground pin for the internal circuits. 11 PGOOD Power Good Open-drain output pin that signals whether the output voltage is within a valid range. A low voltage indicates an issue, while a high voltage indicates normal operation. 12 COMP Compensation Connect to external components for voltage loop compensation. 13 FB Feedback This is the feedback pin for the voltage regulator. Connect this to a voltage divider to sense the output voltage and regulate it. 14 ILIM Current Limit Current limit pin. It is used to set the current threshold for the power supply to prevent excessive current from damaging the device. 15 PGND Power Ground Additional ground pin for the power system. 16 SW Switch Node This pin is where the switching node of the internal MOSFET is connected. It's connected to the inductor. 17 BOOT Boot Strap The boot capacitor pin used to drive the high-side MOSFET gate. A capacitor is connected between this pin and SW pin to allow the gate of the high-side MOSFET to be properly driven. 18 VOUT Output Voltage Secondary output pin that can be used for other feedback or measurement purposes. 19 CIN Input Capacitor Pin where the input capacitor should be connected. Used to stabilize the input power. 20 COUT Output Capacitor Pin where the output capacitor should be connected to filter and stabilize the output voltage.FAQs (20 Questions and Answers):
Q: What is the maximum input voltage for TPS54620RHLR? A: The maximum input voltage for TPS54620RHLR is 17V.
Q: What is the minimum input voltage for TPS54620RHLR? A: The minimum input voltage for the TPS54620RHLR is 4.5V.
Q: How do I enable the TPS54620RHLR? A: To enable the TPS54620RHLR, apply a voltage above 2.5V to the EN pin. When the voltage is below 0.4V, the device is disabled.
Q: What is the function of the PGOOD pin? A: The PGOOD pin is used to indicate the status of the output voltage. A high level on this pin indicates the output voltage is within regulation.
Q: What is the purpose of the SS pin? A: The SS (Soft Start) pin is used to control the startup time of the output voltage. A capacitor on this pin defines the soft-start duration.
Q: Can I adjust the switching frequency of TPS54620RHLR? A: Yes, the switching frequency can be adjusted by connecting a resistor to the FREQ pin.
Q: What is the recommended external components for voltage feedback in TPS54620RHLR? A: The FB pin requires a voltage divider connected to the output voltage to regulate the voltage.
Q: What does the ILIM pin do? A: The ILIM pin is used to set the current limit threshold of the power supply to avoid overcurrent conditions.
Q: How do I set the frequency of the TPS54620RHLR? A: Set the frequency by placing an external resistor between the RT pin and ground.
Q: What is the purpose of the COMP pin? A: The COMP pin is for voltage loop compensation. It requires external components for stabilization.
Q: What is the voltage range for the VOUT pin? A: The output voltage range for TPS54620RHLR depends on the feedback configuration and can be adjusted within the allowable range set by external components.
Q: Is there a thermal shutdown feature in TPS54620RHLR? A: Yes, TPS54620RHLR includes thermal shutdown protection to prevent overheating.
Q: How is the TPS54620RHLR’s power efficiency? A: TPS54620RHLR is designed for high efficiency, typically above 90%, depending on the load and input/output conditions.
Q: What is the switching node (SW) used for? A: The SW pin is used to connect the inductor and the switching node, where the internal MOSFETs operate.
Q: How should I use the BOOT pin? A: The BOOT pin connects to a bootstrap capacitor between the SW pin and the BOOT pin to drive the high-side MOSFET gate.
Q: How do I connect the CIN and COUT capacitors? A: The CIN capacitor should be placed close to the VIN pin to filter the input voltage. The COUT capacitor should be placed at the output to stabilize the output voltage.
Q: Is the TPS54620RHLR a linear regulator or a switching regulator? A: The TPS54620RHLR is a switching regulator, specifically a buck converter.
Q: Can the TPS54620RHLR be used for both step-down and step-up regulation? A: No, the TPS54620RHLR is designed for step-down (buck) regulation only.
Q: What happens if the TPS54620RHLR enters overcurrent mode? A: If overcurrent is detected, the TPS54620RHLR will limit the current to prevent damage, and the output voltage may drop.
Q: What is the typical output voltage range of TPS54620RHLR? A: The typical output voltage range depends on the feedback resistor configuration and can be set from 0.8V to 5.5V.
This should provide you with a thorough understanding of the TPS54620RHLR part and its pin functionality, packaging, and usage.
