PMIC - Voltage Regulators - DC DC Switching Regulators

The LTC3370EUH#PBF is a DC/DC controller/regulator with a selectable high-side synchronous rectifier. This device operates from a 4.5V to 18V input voltage range and is designed to provide an adjustable and accurate constant-current output. It is capable of providing up to 40A of output depending on the external MOSFETs selected. The LTC3370EUH#PBF offers the unique ability to turn on the synchronous rectifier at a user-selectable load current, and this allows the use of external MOSFETs suited for various applications. With the synchronous rectifier enabled, the LTC3370EUH#PBF can be used in applications such as point-of-load (POL) converter, voltage regulator modules (VRM), and controller/regulator systems.

Working Principle

The LTC3370EUH#PBF uses a current-mode control, a fixed frequency PWM switching, and an integrated over-current protection (OCP) circuit to produce a constant current output in a wide range of input voltage conditions. The current-mode control ensures a reliable and predictable response at any given supply voltage and load condition. The PWM switching frequency, which can be selected from 5kHz to 300kHz, is adjustable through an onboard resistor. The internal OCP circuit limits the maximum output current to prevent any damage to the external power components.

Features

• Input voltage range: 4.5V to 18V
• Selectable high-side synchronous rectifier
• Current-mode control with adjustable switching frequency
• Internal OCP circuit
• Selectable current limit protection
• Accurate constant-current output
• 2A peak limit current range

Applications

The LTC3370EUH#PBF is well suited for many applications, including point-of-load (POL) converters, voltage regulator modules (VRM), and controller/regulator systems. Because of its adjustable switching frequency, it can be used in a wide range of applications. With its selectable high-side synchronous rectifier, the LTC3370EUH#PBF provides the flexibility of selecting the optimal external MOSFETs based on the customer\'s system requirements. It is also ideal for applications that require a wide range of input voltages, including 48V bus voltages.

Conclusion

The LTC3370EUH#PBF is a DC/DC controller/regulator with selectable high-side synchronous rectifier. This device is well suited for many applications, including point-of-load (POL) converters, voltage regulator modules (VRM), and controller/regulator systems. It operates from a 4.5V to 18V input voltage range and is designed to provide an adjustable and accurate constant-current output. With its selectable high-side synchronous rectifier, the LTC3370EUH#PBF provides the flexibility of selecting the optimal external MOSFETs based on the customer\'s system requirements.