LTC3521EFE#PBF

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The LTC3521EFE#PBF is a high-efficiency DC/DC switching regulator capable of delivering up to 2A of output current. The regulator\'s design is primarily for handheld and portable devices that are powered by Li-Ion and other battery chemistries, but its functionality also makes it ideally suited for applications in communication systems, office automation and industrial systems.

An integrated 0.5A low-side MOSFET power switch with 2.5V SOA ensures high efficiency and a small footprint, while a 150A peak current drain capability allows fast transient response. The LTC3521EFE#PBF incorporates a wide range of input voltage regulation, up to 6.5V, and is designed to maintain that regulation over a wide temperature range by using an adaptive automotive-grade protection scheme.

The LTC3521EFE#PBF utilizes a wide operating temperature range from –40°C to +125°C and meets the needs of devices operating in extreme thermal environments. The fast response of the device to transient conditions makes it suitable for use in automotive applications, where fast voltage regulation is essential. Its robust design allows for a wide range of input voltages, from 2V to 6.5V, and a wide range of output voltage settings from 0.6V to 6V, making it suitable for a variety of applications.

The LTC3521EFE#PBF is composed of several sections that are responsible for different parts of the regulation process:

• The internal power switch is composed of a 0.5A N-channel MOSFET with 2.5V SOA. This switch is responsible for supplying the output current to the load.
• A pulse-width modulator (PWM) controls the switching frequency and the output voltage and current. The switching frequency is adjustable from 200kHz to 1.8MHz, allowing the user to optimize the efficiency of the switching regulator to suit their specific application requirements.
• The gate driver circuitry drives the internal power switch. The gate driver circuitry is responsible for reducing switching losses and providing fast switching times.
• A 4.5V to 6V input voltage regulator provides a stable supply to the switching regulator, allowing for an adjustable output voltage from 0.6V to 6V.
• An adaptive undervoltage lockout circuit provides overvoltage protection of the input voltage.
• A 150A peak current drain allows for fast transient response, which is necessary for applications such as automotive and industrial systems.

The LTC3521EFE#PBF is a high-efficiency DC/DC switching regulator that meets the demands of handheld and portable device applications as well as other requirements, such as in communication systems, office automation and industrial systems. The wide operating temperature range from –40°C to +125°C makes the device suitable for extreme thermal environments. The wide input voltage range from 2V to 6.5V and output voltage range from 0.6V to 6V allows for the device’s use in a wide variety of applications, including automotive and industrial systems. The fast response time and 0.5A low-side MOSFET power switch with 2.5V SOA make the device suitable for demanding operating conditions.

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