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TPS54494 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS54494 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 30 page V = 1.5 V (50 mV/div) O2 Iout (1 A/div) t - Time - 100 s/div m Input Voltage PGND PGND C4 SW1 VIN1 VBST1 EN1 VFB2 VFB1 GND VREG5 PGND1 6 VIN2 VBST2 EN2 SW2 PG1 5 1 3 PG2 9 10 11 PGND2 2 4 7 13 12 TPS54494 HTSSOP16 14 8 15 16 PGND SGND SGND C11 VO1 C21 R11 R21 L11 C31 C32 L12 C12 VO2 C22 R12 R22 (PowerPAD) TPS54494 www.ti.com SLVSBH1B – JUNE 2012 – REVISED AUGUST 2013 4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET Check for Samples: TPS54494 1 FEATURES APPLICATIONS 2 • D-CAP2™ Control Mode • Point-of-Load Regulation in Low Power Systems for Wide Range of Applications – Fast Transient Response – Digital TV Power Supply – No External Parts Required For Loop Compensation – Networking Home Terminal – Compatible with Ceramic Output – Digital Set Top Box (STB) Capacitors – DVD Player/Recorder • Wide Input Voltage Range : 4.5 V to 18 V – Gaming Consoles and Other • Output Voltage Range : 0.76V to 7V DESCRIPTION • Highly Efficient Integrated FETs Optimized for The TPS54494 is a dual, adaptive on-time D-CAP2™ Low Duty Cycle Applications mode synchronous buck converter. The TPS54494 – 90 m Ω (High Side) and 60 mΩ (Low Side) enables system designers to complete the suite of • High Initial Reference Accuracy various end equipment’s power bus regulators with a cost effective, low component count, and low standby • 4A CH1 / 2A CH2 Continuous Load Current current solution. The main control loops of the • Low-Side rDS(on) Loss-Less Current Sensing TPS54494 use the D-CAP2™ mode control which • Fixed Soft Start : 1 ms provides a very fast transient response with no • Non-Sinking Pre-Biased Soft Start external compensation components. The adaptive on- time control supports seamless transition between • Powergood PWM mode at higher load conditions and Eco- • 700 kHz Switching Frequency mode™ operation at light loads. Eco-mode™ allows • Cycle-by-Cycle Over-Current Limit Control the TPS54494 to maintain high efficiency during lighter load conditions. The TPS54494 is able to • OCL/UVLO/TSD Protections adapt to both low equivalent series resistance (ESR) • Hiccup Timer for Overload Protection output capacitors such as POSCAP or SP-CAP, and • Adaptive Gate Drivers with Integrated Boost ultra-low ESR, ceramic capacitors. The device PMOS Switch provides convenient and efficient operation with input voltages from 4.5V to 18V. • OCP Constant Due To Thermally Compensated rDS(on) with 4000ppm/℃ ℃ The TPS54494 is available in a 4.4 mm × 5 mm 16- pin TSSOP (PWP) and 4 mm x 4 mm 16-pin VQFN • 16-Pin HTSSOP, 16-Pin VQFN (RSA) package, and is specified for an ambient • Auto-Skip Eco-mode™ for High Efficiency at temperature range from –40°C to 85°C. Light Load 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. 2 D-CAP2, Eco-mode, Eco-Mode are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2012–2013, 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. |
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Descripción similar - TPS54494_15 |
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