LTC3129EMSE-1#PBF

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LTC3129EMSE-1#PBF is a multipurpose, high-performance DC/DC switching regulator from Linear Technology Corporation that has a wide range of applications. It is a highly efficient, advanced switching regulator with an adjustable output voltage that can be set up between 0.415V and 4V. This regulator is advanced enough to handle a wide range of input and output voltage combinations, including a maximum output current dependence on input voltage of 2.5A.

This device can efficiently convert an input voltage in the range of 2.3V to 5.5V into an adjustable output voltage by using a variety of power management techniques. Its adjustable switching frequency also allows the device to be used in a variety of applications. The device is suited for powering portable electronic devices and other battery-operated products that require regulated output voltages.

The device has two power drivers (A and B) that form the basis of its operation. Power driver A is used to control and switch the power supply while power driver B is used to provide the feedback and control signals. A logic-level voltage interpreter (VIN) is also available that is used to interface with external logic signals and/or control a logic-level output from the LTC3129EMSE-1#PBF.

The device employs a synchronous rectifier, pulse-skipping mode, current-mode voltage-mode control and low EMI, which provides excellent efficiency for a wide range of output currents and input voltages. The PFM/PWM operating mode selector allows the user to determine between pulse-width modulation and pulse-frequency modulation based on their application needs. The device also includes an adjustable oscillator and soft-start feature, making it a truly all-in-one PMIC.

The device can be used in multiple applications that require DC/DC switching regulators. Some of which are:

• Battery-powered portable communications equipment
• Servo/motor control systems
• Data logging systems
• Wireless communications systems
• LCD displays
• Smart energy metering

The working principle of this device is similar to other DC/DC switching regulators like low dropout regulators and linear regulators. The device is designed to operate by continuously switching an external power MOSFET between an on and off state. When the external power MOSFET is on, an input voltage V_IN is applied to the output of the power supply. When the power MOSFET is off, the output voltage V_OUT will be regulated by adjusting the duty cycle of the external MOSFET. By rapidly switching the MOSFET between the on and off states, the device can provide an adjustable output voltage.

The LTC3129EMSE-1#PBF is an excellent device for use in multiple applications that require a high efficiency, adjustable DC/DC switching regulator. It is an all-in-one PMIC that includes programmable output voltage, programmable switching frequency, adjustable oscillator frequency and soft start, making it an ideal choice for battery powered portable applications.

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