LM46002AQPWPTQ1

Voltage - Input (Max):	60V
Supplier Device Package:	16-HTSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	200kHz ~ 2.2MHz
Current - Output:	2A
Voltage - Output (Max):	28V
Voltage - Output (Min/Fixed):	1V
Series:	Automotive, AEC-Q100, SIMPLE SWITCHER®
Voltage - Input (Min):	3.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LM46002AQPWPTQ1 Application Field and Working Principle

Introduction

The LM46002AQPWPTQ1 is a DC-DC switching regulator integrated circuit (IC) from Texas Instruments, which is a Positive Voltage Regulator type. It operates as a converter designed to keep a constant output voltage irrespective of changes in the input voltage. It belongs to the PMIC - Voltage Regulators - DC DC Switching Regulators section.

Application Field

The LM46002AQPWPTQ1 is mainly used as positive voltage regulator in applications where the input and output voltages have a positive-negative relationship. It is widely used in systems that require a low noise output voltage with precise accuracy. This IC is widely used in data acquisition systems, sensor modules, portable audio systems, and photovoltaic systems.

Features and Benefits

The LM46002AQPWPTQ1 integrated circuit provides various features, including a low quiescent current (Iq) of 4.2 mA, a high load and line regulation of 1.0 % and 1.04 %, respectively. The device also provides current limiting, thermal protection, and overvoltage protection. It has an output voltage accuracy of ±1 %, and a switching frequency of 1.5 MHz. With a wide operating temperature range of -40 to 125 °C, the IC is suitable for automotive, industrial, and consumer applications. Furthermore, it can handle up to 7 A of peak load current.

Working Principle

The working of the LM46002AQPWPTQ1 converter is largely dependent on the linear regulators and switching regulators. The central element of the IC is a Switching Regulator, which acts as a DC-DC converter to regulate the output voltage. The switching regulator enables fast operation and higher efficiency than that of linear regulators. The LM46002AQPWPTQ1 includes two pins, with input voltage at \'VIN\' pin and output voltage at \'VOUT\' pin. This IC uses an N-channel MOSFET as a switch and works in a buck-switch mode (step-down converter mode) to produce an output voltage lower than the input voltage. When the input voltage is used, the internal switching circuitry starts to regulate the output voltage. The internal clock in the IC works as a reference frequency to control the gates of the MOSFET, which in turn will control the current passing through inductor and capacitors that constitute a buck configuration. The switching process is then enabled by the pulse-width modulator (PWM), which adjusts the output voltage by controlling the switching of the MOSFET. The connected load to the VOUT pin uses the output current to produce the regulated output voltage for the load. During the process of voltage regulation, there will be a small amount of noise and ripple on the output voltage which can be suppressed by using a LC filter.

Conclusion

The LM46002AQPWPTQ1 is a positive voltage regulator from Texas Instruments, which is placed under PMIC - Voltage Regulators - DC DC Switching Regulators section. It is widely used in data acquisition systems, sensor modules, portable audio systems, and photovoltaic systems. It provides numerous features, including a low quiescent current (Iq) of 4.2 mA, a high load and line regulation of 1.0 % and 1.04 %, respectively, and an output voltage accuracy of ±1 %. It also offers current limiting, thermal protection, and overvoltage protection, as well as a wide operating temperature range of -40 to 125 °C.The working principle of the LM46002AQPWPTQ1 IC mainly depends on the Linear Regulators and Switching Regulators. The integrated circuit uses an N-channel MOSFET as a switch and works in a buck-switch mode to produce an output voltage lower than the input voltage. In order to regulate the output voltage, the internal clock in the IC works as a reference frequency to control the switching of the MOSFET by the pulse-width modulator (PWM).

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