Voltage - Output (Min/Fixed):	1.8V
Base Part Number:	LM2853
Supplier Device Package:	14-HTSSOP
Package / Case:	14-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	550kHz
Current - Output:	3A
Voltage - Output (Max):	--
Series:	SIMPLE SWITCHER®
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction: LM2853MHX-1.8/NOPB

The LM2853MHX-1.8/NOPB is a high-performance, low-voltage, monolithic synchronous step-down dc-dc converter. It operates from a 3 V to 28 V input supply voltage and can output up to 1.8 A from an adjustable output voltage of 0.8 V to 2.5 V. The device is designed with high output power density, efficiency, and low hysteresis ripple current. It is capable of operating in continuous or discontinuous conduction modes and is capable of operation at up to 4 MHz switching frequency.

Application Fields

The LM2853MHX-1.8/NOPB is ideal for applications such as core voltage for processor-based systems; providing adjustable output voltages for FPGA and other logic-based systems; powering low voltage analog and digital chips; powering liquid crystals; operating digital potentiometers; providing adjustable output voltages for SRAMs, EEPROMs, and Flash memory; and providing regulation for battery powered systems. Its wide input voltage range, adjustable output voltage range, high efficiency, low ripple current, low dropout voltage, and small size make it suitable for many applications.

Working Principle

The LM2853MHX-1.8/NOPB utilizes a switching topology to convert the input voltage to a regulated output voltage. It operates by applying a pulse width modulation (PWM) signal to an internal MOSFET, which switches the input voltage to the output. The output voltage of the device is regulated by sensing the feedback signal and adjusting the width of the PWM pulse to ensure that the output voltage remains constant. The LM2853MHX-1.8/NOPB also incorporates internal MOSFETs for soft start and current limiting, as well as a voltage regulation loop with a high-bandwidth error amplifier.

Conclusion

The LM2853MHX-1.8/NOPB is a high-performance, low-voltage, monolithic synchronous step-down dc-dc converter. It is ideal for a variety of applications, including core voltage for processor-based systems, powering liquid crystals and SRAMs, EEPROMs, and Flash memory, and providing regulation for battery powered systems. Its wide input voltage range, adjustable output voltage range, high efficiency, low ripple current, low dropout voltage, and small size make it suitable for many applications. The LM2853MHX-1.8/NOPB utilizes a switching topology to convert the input voltage to a regulated output voltage, and operates by applying a pulse width modulation (PWM) signal to an internal MOSFET, which switches the input voltage to the output.

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