LTC1439IG#PBF

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The LTC1439IG#PBF is a dual 2-phase step-down synchronous controller designed for high current, high efficiency DC/DC conversion applications like synchronous CPUs, as well as auxiliary regulators, FPGAs and ASICs that require a low-noise main power source. It is part of Linear Technology’s Power Management IC (PMIC) product family, specifically within the Voltage Regulators and DC/DC Switching Controllers category. It integrates two input/output controllers, enabling use in applications such as zero current turn-on or off, slew rate control, etc. Additionally it features start-up precision current limit, pulse-by-pulse current limit as well as de-rating versus temperature.

The LTC1439IG#PBF features very low standby current, typically in the range of 1µA, which translates into high efficiency resulting in negligible power loss. This reduces overall system power costs and improves the reliability of the system. Furthermore, since the IC contains two independently programmable controllers it can be used to support a wide range of inputs and outputs. The LTC1439IG#PBF is ideal for applications that require high current deliver, high efficiency and fast transient response.

This device performs the difficult task of synchronizing the two output phases automatically. This eliminates the need for external PLLs or other special components, ultimately reducing the number of parts and system cost. Additionally, the integrated clock synchronization feature provides a mechanism to maintain maximum power efficiency over a wide range of supply voltage fluctuations. The LTC1439IG#PBF also has low output voltage ripple and noise, low startup current, and fast transient response when the output is loaded with capacitive or inductive loads.

The LTC1439IG#PBF is available in an 8-lead SOIC and 6-lead SOT-23-6 package and operates over the extended temperature range of -40°C to +125°C, making it well-suited for a variety of demanding applications. Its low standby current, low EMI level and wide range of input/output voltage settings make it an excellent choice for high current, high efficiency DC/DC control applications.

In summary, the LTC1439IG#PBF is a dual 2-phase step-down synchronous controller designed for high current, high efficiency DC/DC conversion applications. It is part of Linear Technology’s Power Management IC (PMIC) product family, specifically within the Voltage Regulators and DC/DC Switching Controllers category. It has low standby current, low EMI level, wide range of input/output voltage settings, low output voltage ripple and noise, low startup current and fast transient response when the output is loaded with capacitive or inductive loads, making it an excellent choice for high power applications. These features, coupled with its automatic synchronizing of two output phases, the ability to maintain maximum power efficiency over a wide range of supply voltage fluctuations, as well as its extended temperature range, make it an ideal solution for high current, high efficiency DC/DC control applications.

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