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LTC3728 - 2-Phase Synchronous Step-Down Switching Regulator

Description

The LTC®3728 is a dual high performance step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages.

A constant-frequency current mode architecture allows phase-lockable frequency of up to 550kHz.

Features

  • n Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise n OPTI-LOOP® Compensation Minimizes COUT n ±1% Output Voltage Accuracy n Power Good Output Voltage Indicator n Phase-Lockable Fixed Frequency 250kHz to 550kHz n Dual N-Channel MOSFET Synchronous Drive n Wide VIN Range: 3.5V to 36V Operation n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Soft-Start Current Ramping n Foldback Output Current Limiting n Latched Short-Circuit Shutdown with Defe.

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Full PDF Text Transcription

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FEATURES n Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise n OPTI-LOOP® Compensation Minimizes COUT n ±1% Output Voltage Accuracy n Power Good Output Voltage Indicator n Phase-Lockable Fixed Frequency 250kHz to 550kHz n Dual N-Channel MOSFET Synchronous Drive n Wide VIN Range: 3.5V to 36V Operation n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Soft-Start Current Ramping n Foldback Output Current Limiting n Latched Short-Circuit Shutdown with Defeat Option n Output Overvoltage Protection n Remote Output Voltage Sense n Low Shutdown IQ: 20μA n 5V and 3.
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