The TPS40055 is a family of high-voltage, wide input (8 V to 40 V), synchronous, step-down converters. The TPS40055 family offers design flexibility with a variety of user programmable functions, including soft-start, UVLO, operating frequency, voltage feed-forward, high-side current limit, and loop compensation.
●The TPS40055 are also synchronizable to an external supply. The TPS40055 incorporates MOSFET gate drivers for external N-channel high-side and synchronous rectifier (SR) MOSFETs. Gate drive logic incorporates anti-cross conduction circuitry to prevent simultaneous high-side and synchronous
●rectifier conduction.
●The TPS40055 uses voltage feed-forward control techniques to provide good line regulation over the wide (4:1) input voltage range and fast response to input line transients with near constant gain with input variation which eases loop compensation. The
●externally programmable current limit provides pulse-by-pulse current limit, as well as a hiccup mode operation utilizing an internal fault counter for longer duration overloads.
● Operating Input Voltage 8 V to 40 V
● Input Voltage Feed-Forward Compensation
● < 1 % Internal 0.7-V Reference
● Programmable Fixed-Frequency Up to 1-MHz Voltage Mode Controller
● Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs
● 16-Pin PowerPAD Package™ (ηJC = 25°C/W)
● Thermal Shutdown
● Externally Synchronizable
● Programmable High-Side Sense Short-Circuit Protection
● Programmable Closed-Loop Soft-Start
● TPS40055 Source/Sink
● SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS
● Controlled Baseline
● One Assembly/Test Site
● One Fabrication Site
● Available in Military (–55°C/125°C) Temperature Range(1)
● Extended Product Life Cycle
● Extended Product-Change Notification
● Product Traceability
● APPLICATIONS
● Power Modules
● Networking/Telecom
● Industrial/Servers
●(1) Additional temperature ranges available - contact factory
