LMR10510YMF/NOPB

Series:	SIMPLE SWITCHER®
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	3V
Voltage - Input (Max):	5.5V
Voltage - Output (Min/Fixed):	0.6V
Voltage - Output (Max):	4.5V
Current - Output:	1A
Frequency - Switching:	3MHz
Synchronous Rectifier:	No
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	LMR10510

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The Texas Instruments LMR10510YMF/NOPB DC-DC switching regulator is a high performance, wide-input-range, non-synchronous, step-down regulator. This device can accept a wide input voltage range of 6 V-80 V, and provide outputs from 0.7 V to 75 V with a 0.45 A rated load. The switching regulator is ideal for distributed power systems, digital point-of-load conversion, and DC-DC converters in automotive applications.The LMR10510YMF/NOPB DC-DC switching regulator features a current-mode control architecture with over-voltage protection and over-temperature protection. The external circuit includes an inductor, two current Sense Resistor, a voltage feedback, and a power switch. The power switch is a N-Channel MOSFET with a built-in body diode. The controller section consists of a voltage detector, a reference voltage, a transconductance amplifier, and a current sensing circuit.The current-mode control with feedback loop helps to regulate the output voltage within a specified output voltage range. During normal operation, the voltage detector circuit compares the output voltage with the reference voltage and generates an error signal. This error signal is fed to the transconductance amplifier to generate the drive signal for the power switch. Additionally, the current-sense resistor senses the current through the inductor and provides it to the current sensing circuit. The current sensing circuit also includes the \'Frequency-Slope Compensation\' to control the switching frequency of the power switch.The working principle of the LMR10510YMF/NOPB DC-DC switching regulator is to enable the power switch periodically to drive the current through the inductor and generate output voltage across the load. During the \'On\' period, the current flows through the inductor and the power switch. During the \'Off\' period, the load current is supplied from the inductor and from the body diode of the power switch. The output voltage can be regulated within a specific range by adjusting the inductor current, switching frequency, and output voltage level. The inductor current is affected by the amount of current that flows through the power switch during the \'On\' period. The current increases linearly during the \'On\' period and decreases exponentially during the \'Off\' period. The switching frequency can be adjusted by changing the \'Frequency-Slope Compensation\' setting. The output voltage can be regulated by setting the reference voltage. In conclusion, the LMR10510YMF/NOPB DC-DC switching regulator is ideal for distributed power systems, digital point-of-load conversion, and DC-DC converters in automotive applications. It features a current mode control with over-voltage protection and over-temperature protection, and can provide a wide input voltage range and output range from 0.7 V to 75 V. Its working principle is based on enabling the power switch periodically to drive the current through the inductor and regulate the output voltage within a specific range.

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