TI Introduces 3-A SWIFT™ Converter for Digital TV and Industrial Point-of-Load Systems
500-kHz Switcher with Integrated FET Device / Supports 5.5 V to 36 V Input with 90 Percent Efficiency
TI’s non-synchronous TPS5430 SWIFT™ converter provides greater than 90 percent power efficiency and two percent output voltage accuracy (down to 1.23 V). Delivering 3-A of continuous current (4-A peak) at full temperature and operating over a junction temperature range from -40°C to +125°C, the device excels in hot environments where good thermal performance is needed, such as an LCD digital TV display that operates without the use of a cooling fan. The TPS5430 is ideal for powering low-voltage digital signal processors (DSPs), FPGAs and general purpose processors. Additionally, for applications that require higher output voltage levels, such as high power LED or automotive systems, the TPS5430 can step-down voltages as high as 30-V.
To reduce the size of external components, the device’s switching frequency is preset to 500 kHz. In addition, all compensation components are integrated into the TPS5430 monolithic device, which minimizes the total number of required external parts to seven components in a typical application.
Key Features of TPS5430:
• Integrated 110 mohms N-channel MOSFET
• 90 Percent and Higher Efficiency at 3-A Continuous Output Current (4-A Peak)
• Input Voltage Range of 5.5 V to 36 V with Feed-Forward Feature to Provide
Tight Regulation over Wide Input Variations
• Fixed 500 kHz Switching Frequency
• Output Voltage Adjustable Down 1.23 V with Two Percent Accuracy
• Internal 8 ms Soft Start Time
• 18 µA Shutdown Quiescent Current
• -40°C to +125°C Operating Junction Temperature
Low-Voltage, High Frequency 3-A SWIFT DC/DC in QFN
In addition to the TPS5430, TI also announced the TPS54317 synchronous, step-down DC/DC converter with a high switching frequency, which can be synchronized up to 1.6 MHz. The highly efficient new switcher also supports 3-A of continuous current (4-A peak), while supporting an input voltage of 3V to 6 V. The TPS54317, which comes in a 4 mm x 5 mm QFN package, reduces the size of external capacitors and inductors, while stepping down voltage as low as 0.9 V. See: www.ti.com/sc060130b.
Designers who use the TPS5430 and TPS54317 can take advantage of interactive software and other design resources. The SWIFT Software Tool, available free through www.ti.com/swift, includes a bill of materials, reference schematic, loop response graphs and an efficiency curve based on the designer’s inputs. Additionally, more than a dozen application notes and evaluation modules on TI’s TPS54xxx family of SWIFT ICs guide designers through such topics as sequencing, adjusting the output compensation and designing with high-frequency applications.
Availability, Pricing, Packaging
The TPS5430 and TPS54317 SWIFT converters are available in volume production from TI and its authorized distributors. The TPS5430 comes in a highly reliable, thermally enhanced 8-pin HSOIC package, and is priced at $1.85 each in quantities of 1,000 units. The TPS54317 is available in a 4 mm x 5 mm, 24-pin QFN package, and is priced at $2.50 each in quantities of 1,000. The TPS5430EVM-136 and TPS54317EVM-159 evaluation modules are available for $10 each through www.ti.com/swift.