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PTH04000WAH-PTH04000WAZ-PTH04000WAZT
3-A, 3.3/5-V Input Adjustable Switching Regulator with Auto-Track Sequencing
PTH04000W www.ti.com SLTS247B–JUNE 2005–REVISED OCTOBER 2007 3-A, 3.3/5-V INPUT, ADJUSTABLE SWITCHING REGULATOR WITH AUTO-TRACK™ SEQUENCING 1 FEATURES • Point-of-Load Alliance (POLA™) Compatible 2• Up to 3-A Output Current at 85°C • Surface Mount Package • 3.3-V / 5-V Input Voltage • Safety Agency Approvals: - UL/IEC/CSA-22.2 60950-1 • Wide-Output Voltage Adjust (0.9 V to 3.6 V) APPLICATIONS • Efficiencies Up To 94% • Telecommunications, Instrumentation, • On/Off Inhibit and General-Purpose Circuits • Undervoltage Lockout (UVLO) • Output Overcurrent Protection (Nonlatching, Auto-Reset) • Overtemperature Protection • Ambient Temperature Range: –40°C to 85°C DESCRIPTION The PTH04000W is a highly integrated, low-cost switching regulator module that delivers up to 3 A of output current. Occupying a small PCB area, the PTH04000W provides output current at a high efficiency and with minimal power dissipation, thereby eliminating the need for a heat sink. Their small size (0.75 inch × 0.5 inch), high efficiency, and low cost makes these modules practical for a variety of applications. The input voltage range of the PTH04000W is from 3 V to 5.5 V, allowing operation from either a 3.3-V or 5-V input bus. Using state-of-the-art switched-mode power-conversion technology, the PTH04000W can step down to voltages as low as 0.9 V from a 5-V input bus, with typically less than 1 W of power dissipation. The output voltage can be adjusted to any voltage over the range, 0.9 V to 3.6 V, using a single external resistor. This series includes Auto-Track™ sequencing. This feature simplifies the task of supply voltage sequencing in a power system by enabling modules to track each other, or any external voltage, during power up and power down. Other operating features include an undervoltage lockout (UVLO), on/off inhibit, output overcurrent protection, and overtemperature protection. Target applications include telecommunications, test and measurement applications, and high-end consumer products. The modules are available in both through-hole and surface-mount package options, including tape and reel. The PTH04000W is also compatible with TI's roadmap for RoHS and lead-free compliance. STANDARD APPLICATION V O 1 6 Track 2 V PTH04000W I 3 (Top View) C * O + C * 4 5 I 47 µF 47 µF (Optional) (Required) R # Inhibit SET 1%, 0.1 W (Required) GND GND * See the Application Information section for capacitor recommendations. # See the Application Information section for R values. SET 1 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. 2POLA, Auto-Track, TMS320 are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2007, Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
