The part number "TPS62085RLTR" refers to a Power management IC from Texas Instruments (TI). It is specifically a step-down (buck) DC-DC converter with an integrated power path management. The device is used for efficient power conversion in various applications, like portable electronics and industrial systems.
Key Information about TPS62085RLTR:
Brand: Texas Instruments (TI) Package: The part comes in a QFN-20 package. This means it has 20 pins in a 4x4 mm footprint.I will now provide a detailed explanation of the pin functions, including their complete descriptions, and follow up with frequently asked questions (FAQ).
Pin Functions for TPS62085RLTR (QFN-20 Package)
Pin No. Pin Name Pin Function Description 1 VIN Input Voltage Pin. This is the pin where the input supply voltage is connected. The voltage range typically varies from 2.3V to 6.0V for proper operation. 2 PGND Power Ground Pin. Connect to the ground of the power source. It is the reference ground for the power section of the IC. 3 VOUT Output Voltage Pin. This is where the regulated output voltage will be available. The output is controlled by the feedback network and can be adjusted. 4 FB Feedback Pin. Used to sense the output voltage and regulate it to the desired value. The resistor divider is connected here to set the output voltage level. 5 EN Enable Pin. This pin is used to enable or disable the device. A logic high turns on the IC, while a logic low turns it off. 6 PG Power Good Pin. This pin is used to indicate whether the output voltage is within a valid range. It will output a logic high if the voltage is correct. 7 SS Soft-Start Pin. This pin controls the rate of output voltage rise. It is used to minimize inrush current during power-up. 8 COMP Compensation Pin. This pin is used for compensating the feedback loop, typically used to stabilize the system. 9 SYNC Synchronization Pin. This pin is used to synchronize the switching frequency of the converter with an external clock signal. 10 SW1 Switch Pin 1. This is the switching node used for connecting an external inductor to the internal switching transistor . It is involved in the energy transfer during each cycle. 11 SW2 Switch Pin 2. Similar to SW1, but used in dual-phase operation (when applicable). This pin will provide additional switching for higher efficiency and current capability. 12 BOOST Boost Pin. This pin connects to the boost capacitor to drive the high-side MOSFET gate. 13 PGND Power Ground Pin. This pin should be connected to the main ground plane to provide proper current return. 14 FB2 Feedback Pin for Secondary Output. It regulates the voltage for multi-output configurations. 15 OUT2 Output Pin for Secondary Output. Provides regulated voltage for secondary outputs in multi-output configurations. 16 NC No Connect Pin. This pin is not connected internally and does not serve any function. It is reserved for package routing. 17 GND Ground Pin. This is the main ground pin used for low-side components. 18 VOUT2 Secondary Output Voltage Pin. Provides an additional voltage output in a multi-output configuration. 19 SW1 Switch Pin 1 (again, as part of a multi-phase converter). 20 SW2 Switch Pin 2 (again, for multi-phase or high-current designs).FAQ (Frequently Asked Questions) about TPS62085RLTR
Q1: What is the input voltage range for TPS62085RLTR?
A1: The input voltage range for TPS62085RLTR is typically from 2.3V to 6.0V.Q2: How does the EN (Enable) pin work on TPS62085RLTR?
A2: The EN pin is used to turn the device on or off. A logic high enables the IC, while a logic low disables it.Q3: What is the purpose of the FB pin in the TPS62085RLTR?
A3: The FB pin is used to sense the output voltage and compare it to the reference voltage to regulate the output voltage.Q4: Can the output voltage of TPS62085RLTR be adjusted?
A4: Yes, the output voltage can be adjusted by changing the feedback resistor network connected to the FB pin.Q5: How does the Soft-Start (SS) pin help in operation?
A5: The SS pin controls the rate at which the output voltage rises when the IC is powered on, limiting inrush current during startup.Q6: What happens if the output voltage is out of range for TPS62085RLTR?
A6: If the output voltage goes out of range, the PG (Power Good) pin will output a logic low, indicating an issue.Q7: How can I synchronize TPS62085RLTR with an external clock?
A7: You can use the SYNC pin to synchronize the switching frequency of the IC to an external clock signal.Q8: Can TPS62085RLTR handle dual-phase switching?
A8: Yes, the TPS62085RLTR can handle dual-phase switching, with SW1 and SW2 pins providing switching actions for each phase.Q9: What is the function of the BOOST pin?
A9: The BOOST pin connects to the boost capacitor and drives the high-side MOSFET gate to ensure proper operation of the converter.Q10: Is there a power ground pin in the device?
A10: Yes, there are multiple ground pins (PGND and GND) to provide a stable ground reference for both power and low-side sections.Q11: Can TPS62085RLTR be used in a multi-output configuration?
A11: Yes, the device supports multi-output configurations, with pins like FB2 and OUT2 for regulating additional outputs.Q12: What are the power ratings of the TPS62085RLTR?
A12: The device can deliver output power up to 3A, depending on input voltage and the external components used.Q13: How do I set the output voltage for TPS62085RLTR?
A13: The output voltage is set by selecting appropriate resistors for the feedback network connected to the FB pin.Q14: What are the key protections available in TPS62085RLTR?
A14: The IC includes overcurrent protection, thermal shutdown, and undervoltage lockout.Q15: What is the maximum switching frequency for TPS62085RLTR?
A15: The maximum switching frequency for the TPS62085RLTR is typically 2.5 MHz.Q16: Can TPS62085RLTR handle high capacitive loads?
A16: Yes, the device is designed to drive high capacitive loads efficiently.Q17: Is there a thermal shutdown feature in TPS62085RLTR?
A17: Yes, the device features thermal shutdown to protect it in case of overheating.Q18: What is the output voltage tolerance of TPS62085RLTR?
A18: The output voltage tolerance is typically ±1.5% at full load.Q19: How does the Power Good (PG) pin indicate operational status?
A19: The PG pin outputs a logic high when the output voltage is within a valid range, indicating that the IC is operating normally.Q20: What is the maximum current capability of the TPS62085RLTR?
A20: The device can provide up to 3A of output current, depending on input voltage and other conditions.This should give you a comprehensive overview of the TPS62085RLTR IC, its pin functions, and FAQs. The explanations for the pin functions are detailed to provide an understanding of their roles in operation.
