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TPS54352 Dataheets PDF



Part Number TPS54352
Manufacturers Texas Instruments
Logo Texas Instruments
Description 3-A Output Synchronous PWM Switcher
Datasheet TPS54352 DatasheetTPS54352 Datasheet (PDF)

www.ti.com 6,4 mm y 5,0 mm TPS54352, TPS54353 TPS54354, TPS54355 TPS54356, TPS54357 SLVS519A − MAY 2004 − REVISED OCTOBER 2004 4.5ĆV TO 20ĆV INPUT, 3ĆA OUTPUT SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FET (SWIFT) FEATURES D 100 mΩ, 4.5-A Peak MOSFET Switch for High Efficiency at 3-A Continuous Output Current D Uses External Lowside MOSFET or Diode D Fixed Output Versions − 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V D Internally Compensated for Low Parts Count D Synchronizes to External Clock D 1805 Out o.

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www.ti.com 6,4 mm y 5,0 mm TPS54352, TPS54353 TPS54354, TPS54355 TPS54356, TPS54357 SLVS519A − MAY 2004 − REVISED OCTOBER 2004 4.5ĆV TO 20ĆV INPUT, 3ĆA OUTPUT SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FET (SWIFT) FEATURES D 100 mΩ, 4.5-A Peak MOSFET Switch for High Efficiency at 3-A Continuous Output Current D Uses External Lowside MOSFET or Diode D Fixed Output Versions − 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V D Internally Compensated for Low Parts Count D Synchronizes to External Clock D 1805 Out of Phase Synchronization D Wide PWM Frequency − Fixed 250 kHz, 500 kHz or Adjustable 250 kHz to 700 kHz D Internal Slow Start D Load Protected by Peak Current Limit and Thermal Shutdown D Adjustable Undervoltage Lockout D 16-Pin TSSOP PowerPADE Package APPLICATIONS D Industrial & Commercial Low Power Systems D LCD Monitors and TVs D Computer Peripherals D Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors SIMPLIFIED SCHEMATIC TPS54356 SYNC VIN PWRGD ENA BIAS BOOT PH LSG PGND VSENSE PWRPAD Input Voltage Output Voltage DESCRIPTION The TPS5435x is a medium output current synchronous buck PWM converter with an integrated high side MOSFET and a gate driver for an optional low side external MOSFET. Features include a high performance voltage error amplifier that enables maximum performance under transient conditions. The TPS5435x has an under-voltage-lockout circuit to prevent start-up until the input voltage reaches a preset value; an internal slow-start circuit to limit in-rush currents; and a power good output to indicate valid output conditions. The synchronization feature is configurable as either an input or an output for easy 180° out of phase synchronization. The TPS5435x devices are available in a thermally enhanced 16-pin TSSOP (PWP) PowerPAD package. TI provides evaluation modules and the SWIFT Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles. Efficiency − % 100 95 90 85 80 75 70 65 60 55 50 0 EFFICIENCY vs OUTPUT CURRENT VI = 6 V VI = 12 V VI= 12 V VO= 3.3 V fs = 500 kHz 1 2 3 4 IO − Output Current − A 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. PowerPAD and SWIFT are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright  2004, Texas Instruments Incorporated TPS54352, TPS54353 TPS54354, TPS54355 TPS54356, TPS54357 SLVS519A − MAY 2004 − REVISED OCTOBER 2004 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ORDERING INFORMATION TA OUTPUT VOLTAGE PACKAGE PART NUMBER 1.2 V Plastic HTSSOP (PWP) TPS54352PWP 1.5 V Plastic HTSSOP (PWP) TPS54353PWP −40°C to 85°C 1.8 V 2.5 V Plastic HTSSOP (PWP) Plastic HTSSOP (PWP) TPS54354PWP TPS54355PWP 3.3 V Plastic HTSSOP (PWP) TPS54356PWP 5.0 V Plastic HTSSOP (PWP) TPS54357PWP (1) The PWP package is also available taped and reeled. Add an R suffix to the device type (i.e. TPS5435xPWPR). PACKAGE DISSIPATION RATINGS(1) PACKAGE THERMAL IMPEDANCE JUNCTION-TO-AMBIENT TA = 25°C POWER RATING 16-Pin PWP with solder(2) 42.1°C/W 2.36 16-Pin PWP without solder 151.9°C/W 0.66 (1) See Figure 47 for power dissipation curves. (2) Test Board Conditions 1. Thickness: 0.062” 2. 3” x 3” 3. 2 oz. Copper traces located on the top and bottom of the PCB for soldering 4. Copper areas located on the top and bottom of the PCB for soldering 5. Power and ground planes, 1 oz. copper (0.036 mm thick) 6. Thermal vias, 0.33 mm diameter, 1.5 mm pitch 7. Thermal isolation of power plane For more information, refer to TI technical brief SLMA002. TA = 70°C POWER RATING 1.31 0.36 TA = 85°C POWER RATING 0.95 0.26 2 www.ti.com TPS54352, TPS54353 TPS54354, TPS54355 TPS54356, TPS54357 SLVS519A − MAY 2004 − REVISED OCTOBER 2004 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted(1) VIN VSENSE Input voltage range, VI UVLO SYNC ENA BOOT VBIAS LSG SYNC Output voltage range, VO RT PWRGD COMP PH PH Source current, IO LSG (Steady State Current) COMP, VBIAS SYNC LSG (Steady State Current) Sink current, IS PH (Steady State Current) COMP ENA, PWRGD Voltage differential AGND to PGND Operating virtual junction temperature range, TJ Storage temperature, Tstg Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds UNIT −0.3 V to 21.5 V −0.3 V to 8.0 V −0.3 V to 8.0.


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