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LTC3728L-1 - 2-Phase Synchronous Regulator

Description

The LTC®3728L-1 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 ±1.5% Output Voltage Accuracy n Power Good Output Voltage Indicator n Phase-Lockable Fixed Frequency 250kHz to 550kHz n Over Current Latchoff Disabled n Wide VIN Range: 4.5V to 28V (35V for LTC3728LI-1) Operation n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Soft-Start Current Ramping n Foldback Output Current Limiting n Output Overvoltage Protec.

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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 ±1.5% Output Voltage Accuracy n Power Good Output Voltage Indicator n Phase-Lockable Fixed Frequency 250kHz to 550kHz n Over Current Latchoff Disabled n Wide VIN Range: 4.5V to 28V (35V for LTC3728LI-1) Operation n Very Low Dropout Operation: 99% Duty Cycle n Adjustable Soft-Start Current Ramping n Foldback Output Current Limiting n Output Overvoltage Protection n Low Shutdown IQ: 20μA n 5V and 3.
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