LM2665M6X

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The LM2665M6X from Texas Instruments is a monolithic switching regulator — also known as a DC to DC converter — used to provide a regulated output voltage from nearly any input voltage source. It offers an outstanding combination of power savings and output accuracy that is unmatched by other designs, making it the perfect solution for a variety of demanding applications.The LM2665M6X offers several advantages over other designs, including improved output accuracy and a wide range of operating voltage range, with a minimum of 90mV load transient speedup. Furthermore, its internal MOSFET has a maximum RDS(ON) rating of 40 mΩ, allowing it to achieve higher power efficiency and faster output voltage settling. All these features make the LM2665M6X the perfect solution for a wide variety of demanding applications.

Features

• Wide output voltage range: 90 mV load transient speedup
• Internal MOSFET has a maximum RDS(ON) rating of 40 mΩ
• Accurate +/-0.8% output voltage accuracy
• Input voltage range of 6.4 V to 22 V
• Operates over a wide ambient temperature range of -40°C to +85°C
• Protection features include thermal shutdown, over-voltage protection, under-voltage lockout and short-circuit protection
• Available in the space-saving National SOT-223 package

Application Fields and Working Principle

The LM2665M6X is a versatile DC to DC converter, meaning that it can be used to convert nearly any DC power supply into a regulated output voltage. It is ideally suited for a variety of electronic devices and applications, including portable electronics, computing and communications equipment, industrial power supplies, security cameras and audio/video electronics.

The LM2665M6X employs a switching topology to convert one input voltage into the desired output voltage. It employs a pair of MOSFETs, a rectifier diode, an inductor and a switched capacitor to produce an output voltage according to the following steps:

When power is applied to the LM2665M6X, the switching MOSFETs are turned on and off in sequence. This switching action causes the input voltage to be alternately decreased and increased by the amount of the MOSFET’s on- and off-resistances. The switch action also causes the voltage across the inductor and the capacitor to be alternately increased and decreased. The capacitor then stores this energy and the inductor ensures the voltage is constant. The voltage across the capacitor is then rectified by a diode and then amplified and converted to the desired output voltage.

The LM2665M6X also incorporates some innovative features that improve performance and reduce power consumption. Its switching frequency can be adjusted from 200 kHz to 2 MHz, allowing for improved power efficiency due to reduced power losses. Its programmable output current limit feature can be used to limit the maximum amount of output current to prevent damage to the components. Its output voltage accuracy has been improved to +/- 0.8% with the addition of an on-chip voltage controlled current source.

The LM2665M6X makes designing the ideal DC to DC converter easier than ever before. Its wide range of features, high performance and great efficiency make it the perfect choice for almost any application.

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