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TPS51285B Datasheet(PDF) 1 Page - Texas Instruments |
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TPS51285B Datasheet(HTML) 1 Page - Texas Instruments |
1 / 29 page TPS51285A TPS51285B www.ti.com SLVSBX0 – APRIL 2013 Ultra-Low Quiescent (ULQ™) Dual Synchronous Step-Down Controller with 5V and 3.3V LDOs Check for Samples: TPS51285A, TPS51285B 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 TPS51285A and TPS51285B are cost-effective, • Clock Output for Charge-Pump dual synchronous buck controllers with 5-V and 3.3-V • ±1% Reference Accuracy LDOs, targeted for notebook system-power supply • Adaptive On-Time D-CAP™ Mode Control solutions. The device achieves low power consumption by the use of auto-skip and ULQ™ Architecture with 400 kHz (CH1) and 475 kHz modes, which is beneficial for long battery life in (CH2) Frequency system stand-by mode. The 256-kHz VCLK output is • Auto-skip and ULQ™ modes for long battery provided to drive an external charge pump, life in system stand-by mode generating gate drive voltage for the load switches • Internal 0.8-ms Voltage Servo Soft-Start with minimum power consumption in the main converter. The device employs adaptive on-time D- • Low-Side RDS(on) Current Sensing Scheme CAP™ mode control which enables fast load • Built-In Output Discharge Function transient response without external compensation • Separate Enable Input for Switchers network. The TPS51285A/B operates with supply input voltage ranging from 5V to 24V and supports • Dedicated OC Setting Terminals output voltages of 5 V and 3.3 V. The TPS51285A • Power Good Indicator and TPS51285B are available in a 20-pin 3 x 3 (mm) • OVP, UVP and OCP Protection QFN package and is specified from -40°C to 85°C. • Non-Latch UVLO and OTP Protection • 20-Pin, 3 mm x 3 mm, QFN (RUK) NEED SOME SPACE ORDERING INFORMATION(1) ORDERABLE ALWAYS On-LDO OUTPUT SUPPLY QUANTITY DEVICE NUMBER TPS51285ARUKR Tape and Reel 3000 VREG3 TPS51285ARUKT Mini reel 250 TPS51285BRUKR Tape and Reel 3000 VREG3 and VREG5 TPS51285BRUKT 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, ULQ are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 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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