The part number "NCP51460SN33T1G" belongs to ON Semiconductor, a leading provider of semiconductor solutions. This specific part is a DC-DC Buck Converter.
Package Type and Pin Count:
Package Type: The package for this part is typically a QFN-33, which is a 33-pin surface-mount package. The exact package may vary depending on the specific series or revision, but it typically fits this description.Pin Function Specifications & Circuit Principle Instructions:
Below is the detailed pinout and functionality for the NCP51460SN33T1G part. This includes all 33 pins and a functional description for each one.
Pin Number Pin Name Pin Function Description 1 PGND Power Ground Pin: Connects to the system ground for power return. 2 PGND Power Ground Pin: Another power ground pin for better current handling. 3 VOUT Output Voltage: This pin delivers the regulated output voltage to the load. 4 VCC Supply Voltage Pin: Connect this pin to the positive supply voltage (e.g., 3.3V or 5V). 5 SW1 Switching Node 1: The output from the internal switch, connected to external components like inductor or capacitor in the buck converter. 6 SW2 Switching Node 2: Another switching node that helps in the circuit’s operation and works in conjunction with SW1. 7 PGND Power Ground Pin: Connects to the system ground for power return. 8 EN Enable Pin: A logic-level input that enables or disables the converter. 9 FB Feedback Pin: Connect this pin to an external voltage divider for voltage regulation. 10 COMP Compensation Pin: Connect to an external capacitor to control the loop response and stability. 11 VREF Reference Voltage Pin: Provides a stable reference voltage used for regulation. 12 OUT1 Output 1 Pin: Provides additional output voltage for other purposes (if applicable in a multiple-output configuration). 13 OUT2 Output 2 Pin: A second output voltage in multi-output configurations. 14 GND Ground Pin: Connect to the system ground. 15 VIN Input Voltage Pin: Connect to the input supply voltage (e.g., 12V, 24V). 16 VDD Supply Voltage Pin: This is where the main input voltage is connected to the internal circuitry of the IC. 17 TRIM Trim Pin: Used for fine adjustments to the output voltage or other settings in certain configurations. 18 PG Power Good Indicator: Provides a signal indicating if the output voltage is within a proper operating range. 19 ILIM Current Limiting Pin: This pin helps to set the maximum current limit for the converter. 20 SENSE Current Sense Pin: Used for measuring the output current for feedback or control purposes. 21 ISNS Current Sense Pin: An additional current sense for monitoring the performance and load conditions of the converter. 22 VOUT2 Secondary Output Voltage Pin: Connect to external load for another output voltage. 23 VOUT3 Third Output Voltage Pin: Connect this to another external circuit or load. 24 PGOOD Power Good Output: Open-drain output indicating that the converter is operating normally. 25 HCC High Current Control Pin: This pin controls the maximum current output for specific configurations. 26 SYNC Synchronization Pin: Used for syncing multiple converters together for synchronized switching. 27 RT Timing Resistor Pin: Connect a resistor to this pin for controlling the switching frequency of the converter. 28 VSS Ground Pin: This pin connects to the negative side of the circuit. 29 SCL I2C Clock Pin: Connect to an external clock for I2C communication when the IC is part of an I2C system. 30 SDA I2C Data Pin: Connect to the I2C data bus for communication between the IC and a microcontroller or other devices. 31 LX Inductor Pin: This pin is connected to the inductor in the buck converter. 32 MODE Mode Pin: This pin sets the operation mode of the device (e.g., pulse skip or forced PWM mode). 33 IC Internal Control Pin: Used for internal control operations or to select configurations.20 FAQ for the NCP51460SN33T1G (Pin Function Queries):
Q: What is the function of the EN pin in the NCP51460SN33T1G? A: The EN pin is used to enable or disable the converter; applying a high logic level enables the device, while a low logic level disables it.
Q: How do I set the output voltage of the NCP51460SN33T1G? A: The output voltage is set using the Feedback (FB) pin, where an external voltage divider is connected to regulate the output voltage.
Q: What is the purpose of the PGND pins? A: The PGND pins are power ground pins that connect to the system ground to return power from the load back to the ground.
Q: How is the feedback loop stabilized? A: The feedback loop is stabilized using the COMP pin, where an external capacitor can be added for proper loop compensation.
Q: What does the PGOOD pin indicate? A: The PGOOD pin is used to indicate whether the output voltage is within the desired range; it goes low if the output is outside the acceptable limits.
Q: How do I monitor current in the NCP51460SN33T1G? A: The ILIM and ISNS pins are used to monitor and limit the current flowing through the system, providing current feedback for control.
Q: What does the MODE pin do? A: The MODE pin allows the user to select between different operating modes, such as pulse-skipping mode or forced PWM mode.
Q: How can I synchronize multiple NCP51460SN33T1G devices? A: The SYNC pin is used to synchronize multiple devices by providing a shared clock signal.
Q: What happens if the input voltage exceeds the recommended value? A: Exceeding the recommended input voltage may cause damage to the device or improper operation.
Q: Can I use the NCP51460SN33T1G for multi-output applications? A: Yes, the device can support multiple output voltages using the secondary output pins such as VOUT1, VOUT2, and VOUT3.
Q: What is the typical application for the NCP51460SN33T1G? A: The NCP51460SN33T1G is commonly used in power management systems, particularly for DC-DC conversion in industrial, automotive, or communications applications.
Q: How do I adjust the switching frequency? A: The switching frequency is adjusted by adding an external resistor to the RT pin, setting the desired frequency.
Q: What is the purpose of the TRIM pin? A: The TRIM pin is used for fine-tuning the output voltage or other parameters, depending on the application.
Q: How do I handle the Power Good (PG) signal? A: The PG pin is an open-drain output, which can be connected to a pull-up resistor to indicate when the device is operating properly.
Q: What is the maximum output voltage? A: The maximum output voltage depends on the application and the feedback network, but the device is typically rated for voltages up to 15V.
Q: Is there a thermal shutdown feature in the NCP51460SN33T1G? A: Yes, the device has an integrated thermal shutdown to protect against overheating.
Q: What kind of inductor should be used with the NCP51460SN33
