TPS54550PWPRG4 ,4.5V to 20V Input, 5A Synchronous Step-Down SWIFT? Converter with Low-Side Gate Driver 16-HTSSOP -40 to 150MAXIMUM RATINGSOver operating free-air temperature range unless otherwise notedUNITVIN –0.3 V to 21 ..
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TPS54550-TPS54550PWP-TPS54550PWPR-TPS54550PWPRG4
4.5V to 20V Input, 5A Synchronous Step-Down SWIFT?Converter with Low-Side Gate Driver
TPS54550 www.ti.com SLVS623A–MARCH 2006–REVISED APRIL 2006 4.5-V TO 20-V INPUT, 6-A OUTPUT SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FET (SWIFT™) FEATURES DESCRIPTION • 40 mΩ MOSFET Switch for High Efficiency at The TPS54550 is a medium output current 6-A (7.5 Peak) Output Current synchronous buck PWM converter with an integrated high-side MOSFET and a gate driver for an low-side • Uses External Lowside MOSFET external MOSFET. Features include a • Output Voltage Adjustable Down to 0.891 V high-performance voltage error amplifier that enables With 1% Accuracy maximum performance under transient conditions • Synchronizes to External Clock and flexibility in choosing the output filter inductors and capacitors. The TPS54550 has an undervoltage • 180° Out of Phase Synchronization lockout circuit to prevent start-up until the input • Wide PWM Frequency—Fixed 250 kHz, voltage reaches 4.5 V; a slow-start circuit to limit 500 kHz or Adjustable 250 kHz to 700 kHz in-rush currents; and a power good output to indicate • Adjustable Slow Start valid output conditions. The synchronization feature is configurable as either an input or an output for • Adjustable Undervoltage Lockout easy 180° out of phase synchronization. • Load Protected by Peak Current Limit and Thermal Shutdown The TPS54550 device is available in a thermally-enhanced 16-pin TSSOP (PWP) • 16-Pin TSSOP PowerPAD™ Package PowerPAD™ package. TI provides evaluation • SWIFT Documentation Application Notes, and modules and the SWIFT™ Designer software tool to Design Software: www.ti.com/swift aid in quickly achieving high-performance power supply designs to meet aggressive equipment APPLICATIONS development cycles. • Industrial and Commercial Low Power blank Systems blank • LCD Monitors and TVs • Computer Peripherals blank • Point of Load Regulation for blank High-Performance DSPs, FPGAs, ASICs and blank Microprocessors EFFICIENCY Simplified Schematic vs Input OUTPUT CURRENT TPS54550 Voltage 100 SYNC VIN 95 PWRGD 90 SS/ENA 85 VBIAS BOOT 80 PH COMP 75 Output Voltage LSG 70 65 VSENSE PGND V = 9 V, I PWRPAD 60 V = 3.3 V, O f = 700 kHz 55 sw 50 0 1 2 3 4 5 6 I - Output Current - A O 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. SWIFT, PowerPAD are trademarks of Texas Instruments. All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006, Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Efficiency - %
