Fast transient response for 3GHz DSP systems

Texas Instruments has introduced a 10A, nonisolated DC/DC power module with fast transient response and high performance.

Texas Instruments has introduced a 10A, non-isolated DC/DC power module with fast transient response and high performance.

The plug-in module meets the strict three percent accuracy core voltage tolerance requirements of TI's newest 3GHz digital signal processors (DSPs), such as the TMS320TCI6487, with only 3000uF of external output capacitance.

The device also supports point-of-load systems that use high-performance DSPs, microprocessors, ASICs and FPGAs.

Based on TI's extensive T2 family of devices, the new PTH08T240F incorporates TurboTrans technology, which optimises the power module's transient response and reduces the amount of output capacitance by up to eight times.

The technology significantly reduces the peak output voltage deviation under transient load conditions, while saving the customer the cost and board space for additional capacitors.

The PTH08T240F has a wide input voltage range of 4.5 to 14V, and provides up to 92 percent power efficiency at 1.8V output.

The module's output voltage is adjustable from 0.7 to 2V, and features over-current protection and programmable under-voltage lockout.

In addition, the PTH08T240F offers over-temperature protection, on/off inhibit control, differential remote sense and 1.5 percent DC output regulation.

The module is the first power management device that meets the core voltage tolerance requirements of TI's new TCI6487 DSP.

The single chip, multi-core, 3GHz DSP requires a core voltage rail between 0.9 and 1.1V with a source impedance of 2 milliohms.

The TCI6487's voltage tolerance requirement for transient loads of up to 5A is only 15mV, which the PTH08T240F easily supports with only 3000uF of external output capacitance.

This achievement allows wireless infrastructure base station OEMs using the new DSP to simplify their power system designs, while achieving optimal power performance and efficiency.

SmartSync, another element of this module, allows for switching frequency synchronisation of multiple modules, thereby simplifying electromagnetic interference (EMI) noise suppression tasks and reducing input capacitor ripple current requirements.

The PTH08T240F also includes the Auto-Track sequencing feature, which simplifies simultaneous power-up and power-down of multiple power modules in the system.

The PTH08T240F is sampling now and is scheduled to be available in volume production in early 2007 from TI and its authorised distributors.

The module comes in surface-mount and through-hole packages.

Suggested retail pricing is $11.80 in 1000-piece quantities.

Datasheets, application notes, samples and TI's comprehensive portfolio of power management ICs are available.

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