LTC3122HMSE#PBF

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The LTC3122HMSE#PBF is a highly programmable DC/DC step-down switching regulator with an integrated step-down switching converter and high-efficiency MOSFETs. It allows conversion from input voltages up to 28V directly to output voltages as low as 0.8V. This device offers either pulse-skipping or forced PWM mode and operates at up to 3MHz, allowing the use of small external components. The device can accommodate both synchronous and non-synchronous external inductors. Quick turn-on time, low ripple and ultrafast transient response are all aided by integrated compensation and soft-start. The output voltage can be regulated with a precision of ±2.5% over an operating junction temperature of -40°C to +125°C.

The versatile architecture of the LTC3122HMSE#PBF makes it suitable for a wide range of applications. This device can be used in automotive, communications, computer, consumer, hand-held and industrial systems. The LTC3122HMSE#PBF can be used for step-down buck conversion, creating tight regulation of output voltage with minimum power loss. It can also be used to convert the input voltage to a constant voltage supply with either current or voltage fold-back protection. It is ideal for system reset, tracking and generation of multiple output voltages.

In a typical application, an input voltage of between 5V and 28V is applied to the device. The voltage is then regulated down to a specific output voltage as programmed. The device uses a combination of an internal oscillator, pulse-skipping operation and pulse-width modulation (PWM) control to regulate the output voltage. The output voltage is controlled by an external resistor and the load current is regulated by an integrated control logic that enables a low dropout, current-mode regulated output with tight regulation and fast transient response. Moreover, the device\'s architecture allows for the use of either synchronous or non-synchronous external inductors.

The LTC3122HMSE#PBF works according to an interleaving principle to reduce the size of the external components and the power loss. When the voltage drops, the larger components are turned off first, and the smaller components are turned on to keep the output voltage regulated. With an adaptive on-time control loop and an integrated MOSFET, the device achieves high efficiency even in heavy loading conditions. The device can also be used in applications that require loading or unloading control.

The LTC3122HMSE#PBF can also be used in distributed power architecture. The device can be configured in a master/slave configuration to regulate multiple outputs and provide adjustable power management. An internal switch allows the current sharing between regulators to be adjusted as system needs change. Finally, the device also includes a powerGood output and over-temperature protection.

In summary, the LTC3122HMSE#PBF is a programmable, highly efficient, DC/DC step-down switching regulator ideal for applications requiring tight regulation of the output voltage with minimum power loss. It is suitable for a wide range of uses in the automotive, communications, computer, consumer, hand-held and industrial markets. The device can be used for step-down buck conversion, and can be used to generate multiple output voltages. The LTC3122HMSE#PBF can also be used for distributed power applications, load or unload control, and powerGood and over-temperature protection, making it an ideal choice for a variety of applications.

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