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TPS40400  -  3.0V to 20V PMBus Synchronous Buck Controller  -  Texas Instruments Incorporated  -  直流-直流 转换器

Description
The TPS40400 is a cost-optimized flexible synchronous buck controller that operates from a nominal 3 V to 20 V supply. This controller is an analog PWM controller that allows programming and monitoring via the PMBus interface. Flexible features found on this device include programmable soft-start time, programmable short circuit limit and programmable undervoltage lockout (UVLO).
An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Gate drive voltage is 6 V to better enhance the power FETs for reduced losses. Short circuit detection is done by sensing the voltage drop across the inductor or across a resistor placed in series with the inductor.
 

Device Uses

• Smart Power Systems
• Power Supply Modules
• Communications Equipment
• Computing Equipment

Features

• Input Operating Voltage Range: 3 V to 20 V
• PMBus Enabled Analog Controller
• Reference 600 mV ± 1%
• Remote Voltage Sense Amplifier
• Internal 6-V Regulator and 6-V Gate Drive
• Programmable Overcurrent Protection
• Inductor Resistance or Series Resistance Used for Current Sensing
• Programmable Switching Frequency: 200 kHz to 2 MHz
• Powergood Indicator
• Thermal Shutdown
• Programmable Soft-Start
• Internal Bootstrap Diode
• Pre-bias Output Safe
• 24-Pin QFN Package