LT1576CS8#TRPBF

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LT1576CS8#TRPBF DC DC Switching Regulators

The LT1576CS8#TRPBF is a monolithic synchronous step-down switching regulator designed using high-frequency current-mode architecture. It is part of Texas Instruments’ Power Management Solutions, a family of DC/DC Switcher ICs offering innovative capabilities for use in a wide range of applications. The LT1576CS8#TRPBF model is particularly suited for applications requiring a wide input voltage range of 4V to 60V and a high switching frequency and high efficiency.

Application Field

The LT1576CS8#TRPBF is an ideal solution for powering micro-processor cores and FPGAs, ASICs and memories. It is ideal for industrial application including factory automation and medical system, communications, automotive and other power-management applications.The main features of the LT1576CS8#TRPBF include a low quiescent current, fast transient response, easy sequencing and sequencing options, overtemperature protection and predefined fault protection.

Working Principle

The LT1576CS8#TRPBF works in a standard buck topology with a synchronous rectifier. It can support up to a 6A output current, which is monitored internally and adjusted for optimal performance. The device has low EMI and quiescent current by only switching during the peak current portion of the inductor waveform. To reduce power consumption during no-load and light-load conditions, the under-voltage lockout and the adjustable frequency feature combined with PFM/PWM mode can minimize power consumption and provide a longer battery life.

An internal soft-start feature reduces inrush current when the output voltage is enabled. It increases the output voltage slowly, or ramps it up over a set amount of time, allowing the device to gently start up. The device also includes an adjustable over current protection feature. This feature monitors the output current and shuts down the device when it approaches a set maximum value as configured

The LT1576CS8#TRPBF also features an adjustable 12-bit current-sense solution that provides higher efficiency through more precise power regulation by sensing the output current. This feature also allows for current monitoring at the output. The device’s programmable output voltage and frequency allows for wide dynamic range applications.

Conclusion

The LT1576CS8#TRPBF is a high frequency, high efficiency, synchronous DC/DC buck regulator capable of driving up to 6A of output current. It features a wide input voltage range of 4V to 60V and output voltage of 0.3V-5V in preset increments. The LT1576CS8#TRPBF offers low quiescent current, fast transient response, easy sequencing and sequencing options, and overtemperature protection. It has a programmable frequency and adjustable current-sense for more precise power regulation, and adjustable soft-start for reduced inrush current. The combination of these features make the LT1576CS8#TRPBF an ideal choice for a wide range of power-management applications.

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