Texas Instruments TPS51285ARUKT

TPS51285ARUKT Description
The TPS51285ARUKT is a cost-effective, dual synchronous buck controller with 5-V and 3.3-V LDOs， targeted for notebook system-power supply solutions. The TPS51285ARUKT achieves low power consumption by the use of auto-skip and ULQTM modes, which is beneficial for long battery life in system standby mode. The 256-kHz VCLK output is provided to drive an external charge pump, generating gate drive voltage for the load switches with minimum power consumption in the main converter. The TPS51285ARUKT employs adaptive on-time D-CAPTM mode control which enables fast load transient response without an external compensation network. The TTPS51285ARUKT is available in a 20-pin 3 x 3 (mm) QFN package and is specified from -40°C to 85°C.

TPS51285ARUKT Features
Input Voltage Range: 5 V to 24 V Output Voltages: 5 V and 3.3 V (Adjustable Range 10%) Built-in, 100-mA, 5-V, and 3.3-V LDOs Clock Output for Charge-Pump 1% Reference Accuracy Adaptive On-Time D-CAPTM Mode Control Architecture with 400 kHz (CH1) and 475 kHz(CH2) Frequency Auto-skip and ULQTM modes for long battery life in system standby mode Internal 0.8-ms Voltage Servo Soft Start Low-Side Rps(on) Current Sensing Scheme Built-In Output Discharge Function Separate Enable Input for Switchers Dedicated OC Setting Terminals Power Good Indicator OVP, UVP, and OCP Protection Non-L _atch UVLO and OTP Protection 20-Pin, 3 mm x 3 mm, QFN (RUK)

TPS51285ARUKT Applications
Notebook Computers Tablet Computers Communications equipment  Wireless infrastructure  Industrial  Factory automation & control  Personal electronics  PC & notebooks