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TPS5120DBT датащи(PDF) 1 Page - Texas Instruments |
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TPS5120DBT датащи(HTML) 1 Page - Texas Instruments |
1 / 23 page TPS5120 DUAL OUTPUT, TWOPHASE SYNCHRONOUS BUCK DC/DC CONTROLLER SLVS278E – AUGUST 2000 – REVISED MARCH 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Independent Dual-Outputs Operate 180° Out of Phase D Wide Input Voltage Range: 4.5-V – 28-V D Adjustable Output Voltage Down to 0.9 V D Pin-Selectable PWM/SKIP Mode for High Efficiency Under Light Loads D Synchronous Buck Operation Allows up to 95% Efficiency D Separate Standby Control and Overcurrent Protection for Each Channel D Programmable Short-Circuit Protection D Low Supply (1 mA) and Shutdown (1 nA) Current D Power Good Output D High-Speed Error Amplifiers D Sequencing Easily Achieved by Selecting Softstart Capacitor Values. D 5-V Linear Regulator Power Internal IC Circuitry D 30-Pin TSSOP Packaging description The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skip mode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify the power supply design and reduce the external parts count. Each channel is independent, offering a separate controller, overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability. Copyright 2002, Texas Instruments Incorporated 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. 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. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 INV1 FB1 SOFTSTART1 PWM/SKIP CT 5V_STBY GND REF STBY1 STBY2 FLT POWERGOOD SOFTSTART2 FB2 INV2 LH1 OUT1_u LL1 OUT1_d OUTGND1 TRIP1 VCC TRIP2 VREF5 REG5V_IN OUTGND2 OUT2_d LL2 OUT2_u LH2 DBT PACKAGE (TOP VIEW) |
Аналогичный номер детали - TPS5120DBT |
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Аналогичное описание - TPS5120DBT |
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