TPS40190

Product Folder Order Now Technical Documents Tools & Software Support & Community TPS40190 SLUS658D – JULY 2005 – REVISED JUNE 2019 TPS40190 4.5-V to 15-V Input, Voltage-Mode, Synchronous Buck Controller 1 Features 1 Input Operating Voltage Range: 4.5 V to 15 V Reference 0.591 V ±1% Voltage Mode Control Internal 5-V Regulator For Internal Housekeeping, Driver Power and Light External Loads Selectable Short-Circuit Protection Thresholds Pre-Bias Ouput Safe Fixed Switching Frequency of 300 kHz Internal Soft Start Small 3 mm × 3 mm, 10-Pin SON Package Bootstrapped Drivers for N-Channel MOSFET Adaptive Anti-Cross Conduction Internal Bootstrap Diode 1.2-A Drivers for Decreased Switching Loss 2 Applications Cable modem CPE Digital Set Top Box Graphics/Audio Cards Entry-level and Mid-Range Servers 3 Description The TPS40190 is a cost-optimized synchronous buck controller that operates from 4.5 V to 15 V nominally, and implements a fixed frequency voltage mode power supply. The controller uses an adaptive anticross conduction scheme to prevent both the highside and the rectifier MOSFET to be turned on at the same time, preventing shoot through current in the two MOSFETs. The controller also provides a short circuit protection threshold that is user selectable between one of three values. The protection level is set with a single external resistor connected from COMP to GND. During start-up, the impedance connected to COMP is sensed, and the inf...