LTM4644EY#PBF Detailed explanation of pin function specifications and circuit principle instructions
The model "LTM4644EY#PBF" belongs to Analog Devices (specifically part of their Linear Technology series). The LTM4644 is a quad-output, high-efficiency, step-down Power regulator.
Package Type:
The "EY" suffix indicates the LGA (Land Grid Array) package with a 24mm x 24mm footprint and 228 pins.Pin Function Specifications:
As per your request for the detailed explanation of the pin functions and circuit principle instructions, here's the comprehensive guide, which includes the full list of pin functions in tabular format for the LTM4644EY#PBF and answers to common FAQ questions.
Pinout Table for LTM4644EY#PBF
Pin No. Pin Name Function 1 IN1 Input Voltage for Channel 1 2 IN2 Input Voltage for Channel 2 3 IN3 Input Voltage for Channel 3 4 IN4 Input Voltage for Channel 4 5 VOUT1 Output Voltage for Channel 1 6 VOUT2 Output Voltage for Channel 2 7 VOUT3 Output Voltage for Channel 3 8 VOUT4 Output Voltage for Channel 4 9 PGND1 Power Ground for Channel 1 10 PGND2 Power Ground for Channel 2 11 PGND3 Power Ground for Channel 3 12 PGND4 Power Ground for Channel 4 13 ITH1 Control pin for Channel 1 14 ITH2 Control pin for Channel 2 15 ITH3 Control pin for Channel 3 16 ITH4 Control pin for Channel 4 17 MODE1 Mode control for Channel 1 (e.g., Burst Mode or Forced Continuous Mode) 18 MODE2 Mode control for Channel 2 19 MODE3 Mode control for Channel 3 20 MODE4 Mode control for Channel 4 21 RUN1 Enable pin for Channel 1 22 RUN2 Enable pin for Channel 2 23 RUN3 Enable pin for Channel 3 24 RUN4 Enable pin for Channel 4 25 VFB1 Feedback pin for Channel 1 26 VFB2 Feedback pin for Channel 2 27 VFB3 Feedback pin for Channel 3 28 VFB4 Feedback pin for Channel 4 29 PGOOD1 Power Good for Channel 1 30 PGOOD2 Power Good for Channel 2 31 PGOOD3 Power Good for Channel 3 32 PGOOD4 Power Good for Channel 4 33 VOUT_SENSE1 Output Voltage Sense for Channel 1 34 VOUT_SENSE2 Output Voltage Sense for Channel 2 35 VOUT_SENSE3 Output Voltage Sense for Channel 3 36 VOUT_SENSE4 Output Voltage Sense for Channel 4 37 VOUT1_NC No Connect (for Channel 1) 38 VOUT2_NC No Connect (for Channel 2) 39 VOUT3_NC No Connect (for Channel 3) 40 VOUT4_NC No Connect (for Channel 4)FAQ for LTM4644EY#PBF
1. What is the input voltage range for LTM4644?
The input voltage range for LTM4644 is between 4.5V and 16V.2. How many output channels does LTM4644 support?
The LTM4644 supports 4 independent output channels.3. Can the outputs be individually enabled or disabled?
Yes, each channel can be enabled or disabled independently using the RUN pins.4. What is the output voltage range?
The output voltage can be set between 0.6V and 5.5V per channel using external feedback resistors.5. What is the switching frequency of the LTM4644?
The switching frequency is adjustable from 300kHz to 2.2MHz for each channel.6. How is the output voltage controlled?
The output voltage is controlled via feedback through the VFB pins for each channel.7. What does the PGOOD pin indicate?
The PGOOD pin signals whether the output voltage is within regulation for each channel.8. Can the LTM4644 operate in Burst Mode?
Yes, the LTM4644 can operate in Burst Mode, which can be controlled by the MODE pins.9. Is thermal shutdown protection included?
Yes, the LTM4644 includes thermal shutdown protection to prevent overheating.10. Can the LTM4644 be used for high-current applications?
Yes, the LTM4644 can provide up to 4A per channel, with a total output power of 16A.11. What is the maximum operating temperature for the LTM4644?
The maximum operating temperature for the LTM4644 is 125°C.12. Does the LTM4644 have any fault detection capabilities?
Yes, the LTM4644 includes both overcurrent and overvoltage protection features.13. Can I use the LTM4644 for automotive applications?
Yes, the LTM4644 is suitable for automotive applications, given its wide input voltage range and robustness.14. What is the efficiency of the LTM4644?
The efficiency can be up to 95% depending on the output voltage and load conditions.15. Can I configure multiple LTM4644s for higher current applications?
Yes, multiple LTM4644s can be paralleled to increase current capacity.16. What is the typical quiescent current of the LTM4644?
The quiescent current is approximately 50μA per channel.17. Can the LTM4644 operate without external capacitor s?
No, external capacitors are necessary for stable operation.18. What are the applications of LTM4644?
Applications include powering FPGA s, processors, and other high-performance ICs in communication, industrial, and automotive systems.19. Does the LTM4644 provide reverse current protection?
Yes, the LTM4644 features reverse current protection for safety.20. How can I adjust the output voltage of LTM4644?
The output voltage is adjusted via external resistors connected to the feedback pins.This detailed explanation includes all the necessary specifications, pin functions, and answers to common questions about the LTM4644EY#PBF in accordance with your request.
