CS51414

1.5A ， 260 kHz和520 kHz的，具有外部偏置和同步能力低电压降压型稳压器 1.5A, 260 kHz AND 520 kHz, LOW VOLTAGE BUCK REGULATORS WITH EXTERNAL BIAS OR SYNCHRONIZATION CAPABILITY

The CS5141X products are 1.5A buck regulator ICs. These devices are fixed- frequency operating at 260kHz and 520kHz. The regulators use the V control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today"s high- speed logic. These products accommodate input voltages from 4.5V to 40V. The CS51411 and CS51413 contain synchronization circuitry. The CS51412 and have the option of powering the controller from an external 3.3V to 6V supply in order to improve efficiency, especially in high input voltage, light load conditions. The on-chip NPN transistor is capable of providing a minimum of 1.5A of output current, and is biased by an external "boost" capacitor to ensure saturation, thus minimizing on-chip power dissipation. Protection circuitry includes thermal shutdown, cycle-by- cycle current limiting and frequency foldback. The CS51411 and CS51413 are functionally pin-compatible with the LT1375. The CS51412 and CS51414 are functionally pin-compatible with the LT1376.

Features |   | Benefits

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V2 Architecture Provides Ultra-Fast Transient Response, Improved Regulation and Simplified Design

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Reduced output capacitance

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2.0% Error Amp Reference Voltage Tolerance

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Accurate Output Voltage

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Switch Frequency Decrease of 4:1 in Short Circuit Conditions

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Reduces Short Circuit PowerDissipation

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BOOST pin for Bootstrapped Operation

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Maximized Efficiency

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Synchronization Function

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Parallel Supply Operation or Noise Minimization

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Shutdown Lead Provides Power-Down Option

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Increased system flexibility

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85uA Quiescent Current During Power-Down

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Low power dissipation in stand-by mode

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Thermal Shutdown

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Circuit Protection

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Soft Start

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Increased system flexibility

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Pin-Compatible with LT1375 and LT1376

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Easy drop in replacement

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Pb-Free Packages are Available

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