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TPS51275BRUKR Datasheet(PDF) 1 Page - Texas Instruments |
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TPS51275BRUKR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 31 page TPS51275, TPS51275B, TPS51275C www.ti.com SLUSB45B – JUNE 2012 – REVISED MARCH 2013 Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs 1 FEATURES APPLICATIONS 2 • Input Voltage Range: 5 V to 24 V • Notebook Computers • Output Voltages: 5 V and 3.3 V (Adjustable • Tablet Computers Range ±10%) DESCRIPTION • Built-in, 100-mA, 5-V and 3.3-V LDOs The TPS51275, TPS51275B and TPS51275C are • Clock Output for Charge-Pump cost-effective, dual-synchronous buck controllers • ±1% Reference Accuracy targeted for notebook system-power supply solutions. • Adaptive On-Time D-CAP™ Mode Control It provides 5-V and 3.3-V LDOs and requires few external components. The 260-kHz VCLK output can Architecture with 300-kHz and 355-kHz be used to drive an external charge pump, generating Frequency Setting gate drive voltage for the load switches without • Auto-skip Light Load Operation (TPS51275, reducing the main converter efficiency. The and TPS51275C) TPS51275, TPS51275B and TPS51275C supports • OOA Light Load Operation (TPS51275B) high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D- • Internal 0.8-ms Voltage Servo Soft-Start CAP™ control provides convenient and efficient • Low-Side RDS(on) Current Sensing Scheme operation. The device operates with supply input • Built-In Output Discharge Function voltage ranging from 5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51275, • Separate Enable Input for Switchers TPS51275B and TPS51275C are available in a 20- • Dedicated OC Setting Terminals pin, 3 mm x 3 mm, QFN package and is specified • Power Good Indicator from –40°C to 85°C. • OVP, UVP and OCP Protection • Non-Latch UVLO and OTP Protection • 20-Pin, 3 mm x 3 mm, QFN (RUK) NEED SOME SPACE ORDERING INFORMATION(1) ORDERABLE ENABLE OUTPUT SKIP MODE ALWAYS On-LDO PACKAGE QUANTITY SUPPLY DEVICE NUMBER FUNCTION TPS51275RUKR Tape and Reel 3000 Auto-skip VREG3 TPS51275RUKT Mini reel 250 TPS51275BRUKR Tape and Reel 3000 PLASTIC Quad EN1 and EN2 OOA Flat Pack TPS51275BRUKT Mini reel 250 VREG3 and VREG5 TPS51275CRUKR Tape and Reel 3000 Auto-skip TPS51275CRUKT Mini reel 250 (1) 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 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-CAP is a trademark 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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