LTC2952IF

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The LTC2952IF is a highly integrated power-management integrated circuit (PMIC) that is part of a larger family of PMICs from Linear Technology Corporation. This PMIC is designed to manage the power distribution and supply monitoring needs of an entire system. It provides a precision voltage reference, 1.5A supply switching, power-up and power-down sequencing, and voltage and current monitoring, all in a compact 8mm × 8mm footprint.

The LTC2952IF can be used in a range of applications, including consumer and industrial electronics, medical electronics, and communications systems. It can be used to help extend the battery life in portable devices, reduce standby power, reduce system power dissipation, and prolong the life of assemblies such as fans, pumps, and motors. The device is ideal for controlling and monitoring the power supply of an entire system, as well as for applications in which tight voltage and current load regulation is required.

The LTC2952IF is designed to provide a high level of integration, flexibility and performance to the user. It combines the functions of two power supplies and two power management controllers into a single integrated circuit. It provides a precision voltage reference, 1.5A supply switching, up to four independent voltage and current monitoring points, power-up and power-down sequencing, and over-temperature protection.

The LTC2952IF is based on a power supply control and monitor scheme known as “Pulse Frequency Modulation” (PFM). This scheme allows the user to control the current drawn from the power sources while maintaining tight voltage regulation over a wide range of load currents. The PFM scheme is based on a simple two-stage topology: a pulse-width modulator and a linear regulator. In the PFM scheme, the pulse width modulator controls the frequency at which the primary switching transistor is switched on and off by controlling its duty cycle. The linear regulator then adjusts the regulated output voltage by controlling the amplitude of the switching transistor’s pulse.

The LTC2952IF also features built-in current and voltage protection. The current protection is designed to protect the device from overload and short-circuit conditions. The voltage protection prevents over-voltage conditions by automatically disabling the high-voltage input if the output voltage exceeds the protected voltage limit. The device also features on-die thermal protection, which is designed to protect against excessive heating which can occur under extended high-current conditions.

The LTC2952IF also features advanced power-up and power-down sequencing. This allows the user to program a predefined order in which different elements of the system are powered up or powered down. This can be used to prevent the incorrect operation of certain parts of the system. For example, it can be used to ensure that the microcontroller is powered up before the motor is started, or that the adapter is powered down before the main system power is terminated.

The LTC2952IF is a highly integrated, feature-rich power-management IC that is suitable for a wide variety of applications. Its flexibility, combined with its low power-consumption, make it an ideal choice for a variety of applications such as consumer and industrial electronics, medical electronics, and communications systems.

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