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IFC-S01-1

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TPS51225, TPS51225B, TPS51225C www.ti.com SLUSAV0B – JANUARY 2012 – REVISED SEPTEMBER 2012 Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs Check for Samples: TPS51225, TPS51225B, TPS51225C FEATURES APPLICATIONS 1 • • Input Voltage Range: 5.5 V to 24 V • Notebook Computers Output Voltages: 5 V and 3.3 V (Adjustable • Netbook, Tablet Computers Range ±10%) DESCRIPTION Built-in, 100-mA, 5-V and 3.3-V LDOs The TPS51225/B/C is a cost-effective, dualClock Output for Charge-Pump synchronous buck controller targeted for notebook ±1% Reference Accuracy system-power supply solutions. It provides 5-V and Adaptive On-time D-CAP™ Mode Control 3.3-V LDOs and requires few external components. The 260-kHz VCLK output can be used to drive an Architecture with 300kHz/355kHz Frequency external charge pump, generating gate drive voltage Setting for the load switches without reducing the main Auto-skip Light Load Operation (TPS51225/C) converter efficiency. The TPS51225/B/C supports OOA Light Load Operation (TPS51225B) high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, DInternal 0.8-ms Voltage Servo Soft-Start CAP™ control provides convenient and efficient Low-Side RDS(on) Current Sensing Scheme with operation. The device operates with supply input 4500 ppm/°C Temperature Coefficient voltage ranging from 5.5 V to 24 V and supports Built-in Output Discharge Function output voltages of 5.0 V and 3.3 V. The TPS51225/B/C is available in a 20-pin, 3 mm × 3 Separate Enable Input for Switchers mm, QFN package and is specified from –40°C to (TPS51225/B/C) 85°C. Dedicated OC Setting Terminals Power Good Indicator OVP/UVP/OCP Protection Non-latch UVLO/OTP Protection 20-Pin, 3 mm × 3 mm, QFN (RUK) ORDERING INFORMATION (1) 2 • • • • • • • • • • • • • • • ORDERABLE DEVICE NUMBER TPS51225RUKR TPS51225RUKT TPS51225BRUKR TPS51225BRUKT TPS51225CRUKR TPS51225CRUKT (1) ENABLE FUNCTION SKIP MODE ALWAYS ON-LDO EN1/ EN2 Auto-skip VREG3 EN1/ EN2 OOA VREG3 EN1/ EN2 Auto-skip VREG3 & VREG5 OUTPUT SUPPLY QUANTITY Tape and Reel PACKAGE 3000 Mini reel 250 Tape and Reel 3000 Mini reel 250 Tape and Reel 3000 Mini reel PLASTIC Quad Flat Pack (20 pin QFN) 250 For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. 1 2 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. D-CAP, Out-of-Audio are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2012, Texas Instruments Incorporated

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