The part number "LTM4613IV#PBF" refers to a product from Analog Devices, a well-known company that specializes in high-performance analog, mixed-signal, and digital signal processing technologies.
The LTM4613IV#PBF is a step-down (buck) voltage regulator with a high-efficiency DC/DC converter. This component is used to convert a higher input voltage to a lower, stable output voltage for Power ing circuits in embedded systems and devices.
For this particular model, the package type is QFN (Quad Flat No-lead), and the lead count is 40 pins. The pinout is quite detailed, and each pin corresponds to a specific function, as follows:
Pin Function Table:
Pin # Pin Name Function Description 1 VDD Input power supply voltage (typically 4.5V to 60V) 2 GND Ground connection 3 VOUT Output voltage connection (regulated output) 4 EN Enable pin (logic high to enable the converter) 5 FB Feedback pin for regulating output voltage 6 PGND Power ground pin (for power switching devices) 7 SW Switch node for the inductor connection 8 NC No connection, should be left unconnected 9 VOUT2 Second regulated output voltage (if applicable) 10 THERM Temperature monitoring pin for thermal shutdown detection 11 VIN Input voltage pin (positive input for external power supply) 12 VREF Reference voltage pin (provides internal reference for regulation) 13 LO Low-side MOSFET connection for PWM control 14 HI High-side MOSFET connection for PWM control 15 FB2 Second feedback pin for secondary output voltage regulation 16 COMP Compensation pin to adjust loop response 17 PGOOD Power good indicator (logic high when output voltage is within regulation limits) 18 UVLO Undervoltage lockout pin (triggers if input voltage falls below a threshold) 19 MODE Mode select pin (sets operation mode, such as Burst or Continuous mode) 20 SS Soft-start pin (controls the rate of output voltage rise during startup) 21 INTVCC Internal voltage regulator output, provides power for internal logic circuits 22 FREQ Frequency adjustment pin (to adjust switching frequency if required) 23 FB3 Third feedback pin for output voltage regulation (if applicable) 24 SYNC Synchronization pin (used to synchronize the switching frequency with an external signal) 25 VOUT3 Third regulated output voltage (if applicable) 26 CSHR Current sense high-side connection (to measure current for protection and regulation) 27 CS Current sense low-side connection (for measuring output current) 28 PGND2 Power ground for secondary side of the converter 29 NC No connection, should be left unconnected 30 VCC Power supply voltage for the internal circuitry of the IC 31 NC No connection, should be left unconnected 32 NC No connection, should be left unconnected 33 NC No connection, should be left unconnected 34 NC No connection, should be left unconnected 35 NC No connection, should be left unconnected 36 NC No connection, should be left unconnected 37 NC No connection, should be left unconnected 38 NC No connection, should be left unconnected 39 NC No connection, should be left unconnected 40 NC No connection, should be left unconnectedCommonly Asked Questions (FAQ) About the LTM4613IV#PBF
Q1: What is the input voltage range for the LTM4613IV#PBF? A1: The input voltage range for the LTM4613IV#PBF is from 4.5V to 60V.
Q2: What type of package is the LTM4613IV#PBF? A2: The LTM4613IV#PBF comes in a 40-lead QFN package.
Q3: What is the maximum output voltage of the LTM4613IV#PBF? A3: The maximum output voltage is adjustable based on the feedback pin settings.
Q4: How do I enable the LTM4613IV#PBF? A4: The LTM4613IV#PBF is enabled by applying a logic high to the EN pin.
Q5: What does the PGOOD pin indicate? A5: The PGOOD pin indicates when the output voltage is within the regulation limits, providing a logic high signal when the voltage is good.
Q6: Can the LTM4613IV#PBF operate in Burst Mode? A6: Yes, the LTM4613IV#PBF can operate in Burst Mode or Continuous Mode depending on the configuration of the MODE pin.
Q7: How do I monitor the temperature of the LTM4613IV#PBF? A7: The THERM pin allows temperature monitoring, and if the temperature exceeds a certain threshold, the converter may enter thermal shutdown.
Q8: Can I synchronize the LTM4613IV#PBF with an external clock? A8: Yes, the SYNC pin allows you to synchronize the switching frequency with an external clock.
Q9: What is the function of the UVLO pin? A9: The UVLO pin is used for undervoltage lockout detection. It triggers a shutdown if the input voltage falls below a certain threshold.
Q10: Is the LTM4613IV#PBF suitable for high-current applications? A10: Yes, the LTM4613IV#PBF can handle high current applications, with current sensing pins to monitor the power requirements.
Q11: What is the frequency range for the LTM4613IV#PBF? A11: The switching frequency of the LTM4613IV#PBF is adjustable, and can be set via the FREQ pin.
Q12: Can the LTM4613IV#PBF provide multiple output voltages? A12: Yes, the LTM4613IV#PBF can support multiple output voltages with appropriate feedback configurations.
Q13: How do I connect external capacitor s for the LTM4613IV#PBF? A13: External capacitors should be placed at the input and output pins, as per the application guidelines in the datasheet.
Q14: Can I use the LTM4613IV#PBF for point-of-load applications? A14: Yes, the LTM4613IV#PBF is ideal for point-of-load voltage regulation, providing high efficiency and compact design.
Q15: What is the soft-start functionality of the LTM4613IV#PBF? A15: The SS pin controls the soft-start function, which limits the inrush current during startup by gradually ramping up the output voltage.
Q16: What is the output voltage range of the LTM4613IV#PBF? A16: The output voltage is adjustable via the feedback pin, allowing for a wide range of output voltages to suit different applications.
Q17: How can I improve the stability of the LTM4613IV#PBF? A17: Stability can be improved by adjusting the compensation network connected to the COMP pin.
Q18: What happens if the input voltage is too low for the LTM4613IV#PBF? A18: If the input voltage is too low, the LTM4613IV#PBF will not operate properly and may enter undervoltage lockout (UVLO).
Q19: How is current sensing implemented in the LTM4613IV#PBF? A19: The LTM4613IV#PBF features current sense pins (CSHR and CS) that monitor both the high-side and low-side current for protection and regulation.
Q20: Can the LTM4613IV#PBF handle thermal issues? A20: Yes, the LTM4613IV#PBF includes thermal shutdown functionality, which protects the device from overheating.
This detailed explanation covers the key functions of the LTM4613IV#PBF along with common questions you might encounter during usage. If you need additional information, please refer to the official datasheet provided by Analog Devices for more specific electrical characteristics and guidelines.
