LT3467ES6#TRPBF

LT3467ES6#TRPBF Application Field and Working Principle

The LT3467ES6#TRPBF is a dual/triple/quad output synchronous step-down switching regulator from Linear Technology, a leading manufacturer of power management solutions. It is ideal for high current DC-to-DC applications that require high efficiency and low output ripple noise. This device can be configured for a wide range of circuit configuration, from dual synchronous buck converters to triple/quad independent buck converters. In addition, the linear voltage drop mode allows for efficient operation while maintaining low output voltages. The device is available in a MSOP-16 package and meets the JEDEC-MO-220 specification.

Device Overview

The LT3467ES6#TRPBF can provide up to 1.5A of continuous output current per channel with an adjustable output voltage range of 3V to 18V. It integrates two high-side and two low-side N-channel MOSFETs and features a wide 4V to 18V input voltage range. The device also features an adjustable frequency oscillator and power good indicator. The high-side switches are enabled by a logic-level enable control pin and the low-side switches are enabled by an external compensation pin. The device is available in a 16-pin MSOP package.

Circuit Configurations

The LT3467ES6#TRPBF can be configured as a dual synchronous buck converter, triple buck converter, or quad independent buck converter. In dual mode, the two channels can share PWM control both on- and off-times. The third output can be configured as either an isolated converter or as a linear dropout regulator. The fourth output can be configured as either an isolated converter or as a linear regulator. In triple mode, the three outputs can be configured as two synchronous buck and one linear dropout. In quad mode, the four outputs can be configured independently as two synchronous buck, one linear dropout, and one linear regulator.

Features and Benefits

• Wide Adjustable Output Voltage Range: 3V to 18V
• Wide Adjustable Input Voltage Range: 4V to 18V
• High Output Current: Up to 1.5A Per Channel
• High Efficiency: typically up to 95%, depending on load current
• Low Output Ripple Noise: typically less than 15mV
• Adjustable Frequency Oscillator: 1.000MHz to 1.5MHz
• Power Good Indicator: Asserts when the output voltage is within ±3% of its programmed value
• Robust Gate Drivers: 4A Nominal, 7A Peak
• External Compensation Pin: Allows for easy adaptation of the controller to various load conditions

Working Principle

The LT3467ES6#TRPBF is a synchronous buck converter that uses pulse width modulation (PWM) to regulate the output voltage. The device works by switching the MOSFETs on and off, alternately connecting and disconnecting the input voltage from the output voltage. The ratio of the on-time to the off-time is called the duty cycle. The greater the duty cycle, the higher the output voltage. The frequency of the switching is determined by the oscillator frequency, which is adjustable from 1MHz to 1.5MHz.The LT3467ES6#TRPBF also features an external compensation pin, which allows the user to adjust the capacitive load compensation. This pin allows for fine-tuning of the output voltage, depending on the load current. The power-good indicator signals when the output voltage is within ±3% of its programmed value.The output current is limited by the integrated MOSFETs and the output voltage ripple is determined by the input voltage, output voltage, inductor, and output capacitance. The device is designed to reduce the output ripple while providing peak efficiency. The device is available in both a 16-pin MSOP package and a 4-pin SOT-23 package.

Conclusion

The LT3467ES6#TRPBF is a dual/triple/quad output synchronous step-down switching regulator from Linear Technology. It features a wide input voltage range of 4V to 18V, an adjustable output voltage range of 3V to 18V, and up to 1.5A of continuous output current per channel. Additionally, it features an adjustable frequency oscillator, power good indicator, and an external compensation pin for fine-tuning of the output voltage. The device is suitable for a wide range of circuit configurations, from dual synchronous buck converters to triple/quad independent buck converters. Furthermore, it is available in an MSOP-16 package and meets the JEDEC-MO-220 specification.