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TI's New Low-Voltage DC/DC Controllers Boost Gate Drive Performance in 15-A to 25-A Power Systems

Controllers with Predictive Gate Drive(TM) Ease System Power Supply Design

Mar 17, 2004

DALLAS (March 17, 2004) - Texas Instruments Incorporated (TI) (NYSE: TXN) today announced two new synchronous DC/DC buck controllers that increase high performance in non-isolated systems with input voltages from 2.25 V to 5.5 V and output up to 25-A. TI´s newest TPS40KTM devices achieve up to 92 percent power efficiency, save board space and simplify power design in industrial, telecom, datacom, wireless base stations and server applications. See: power.ti.com/sc04072

The TPS40020 and TPS40021 single-chip controllers minimize diode conduction losses associated with high-side and synchronous rectifier N-channel MOSFET transitions. The devices combine TI´s Predictive Gate DriveTM technology with an integrated charge pump to enable a regulated 5-V gate drive for added performance. The controllers also enhance operation with programmable power supply features such as soft-start and high-side short-circuit protection. The TPS40020 and TPS40021 provide a programmable fixed frequency up to 1 MHz and output voltage transient comparators with power good indication to provide faster response time.
The new controllers are supported by TI´s TPS40K Designer software, which includes advanced analysis tools that allow designers to conduct worst-case loop response analysis and component characterization. The TPS40K Designer software, a TPS40021 evaluation module, and application notes are available through power.ti.com

Key Features of TPS40020 and TPS40021:

  • Operating Input Voltage 2.25 V to 5.5 V 
  • Output Voltage as Low as 0.7 V with One Percent Internal 0.7 V Reference 
  • Predictive Gate Drive N-Channel MOSFET Drivers for High Efficiency 
  • Externally Adjustable Soft-Start and Short Circuit Current Limit 
  • Programmable Fixed-Frequency 100 kHz to 1 MHz Voltage-Mode Control 
  • Quick Response Output Transient Comparators with Power Good Indication 

Available Today

The TPS40020 and TPS40021 come in a 16-pin, HTSSOP PowerPadTM package, and are available now from TI and its authorized distributors. Suggested resale pricing for both devices is $1.15 each in quantities of 1,000 units.