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FEATURES

APPLICATIONS

DESCRIPTION

PTH08T255W

40-A, 8-V to 14-V INPUT, 3-V to 5.25-V OUTPUT,

NON-ISOLATED, ADJUSTABLE POWER MODULE

• Designed to meet Ultra-Fast Transient

Requirements up to 300 A/

µs

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• Up to 40-A Output Current

• SmartSync Technology

• 8-V to 14-V Input Voltage

• Parallel Operation

• Wide-Output Voltage Adjust (3.0 V to 5.25 V)

• ±1.5% Total Output Voltage Variation

• Efficiencies up to 96%

• Complex Multi-Voltage Systems

• Output Overcurrent Protection

• Servers

(Nonlatching, Auto-Reset)

• Workstations

• Operating Temperature: –40°C to 85°C

• Safety Agency Approvals: (Pending)

–

UL/IEC/CSA-C22.2 60950-1

• Prebias Startup

• On/Off Inhibit

• Differential Output Voltage Remote Sense

• Adjustable Undervoltage Lockout

• Auto-Track™ Sequencing

• Multi-Phase, Switch-Mode Topology

• TurboTrans™ Technology

The PTH08T255W is a high-performance 40-A rated, non-isolated power module. This module represents the

2nd generation of the popular PTH series power modules with a reduced footprint and improved features.

Operating from an input voltage range of 8 V to 14 V, the PTH08T255W requires a single resistor to set the

output voltage to any value over the range, 3.0 V to 5.25 V. The wide input voltage range makes the

PTH08T255W particularly suitable for advanced computing and server applications that utilize a loosely

regulated 9.6-V to 12-V intermediate distribution bus.

The module incorporates a comprehensive list of features. Output overcurrent and over-temperature shutdown

protects against most load faults. A differential remote sense ensures tight load regulation. An adjustable

under-voltage lockout allows the turn-on voltage threshold to be customized. Auto-Track™ sequencing is a

popular feature that greatly simplifies the simultaneous power-up and power-down of multiple modules in a

power system. Additionally, the capability to current share between multiple PTH08T255W modules allows for

load currents greater than 40A on a single rail.

The PTH08T255W includes new patented technologies, TurboTrans™ and SmartSync. The TurboTrans feature

optimizes the transient response of the regulator while simultaneously reducing the quantity of external output

capacitors required to meet a target voltage deviation specification. Additionally, for a target output capacitor

bank, TurboTrans can be used to significantly improve the regulators transient response by reducing the peak

voltage deviation. SmartSync allows for switching frequency synchronization of multiple modules, thus simplifying

EMI noise suppression tasks and reducing input capacitor RMS current requirements.

The module uses double-sided surface mount construction to provide a low profile and compact footprint.

Package options include both through-hole and surface mount configurations that are lead (Pb) - free and RoHS

compatible.

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Auto-Track, TMS320, TurboTrans are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.