TPS51275 Datasheet | Texas Instruments

FEATURES APPLICATIONS - 2 Input Voltage Range: 5 V to 24 V - Notebook puters - Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%) - Built-in, 100-m A, 5-V and 3.3-V LDOs - Clock Output for Charge-Pump - ±1% Reference Accuracy - Adaptive On-Time D-CAP™ Mode Control Architecture with 300-k Hz and 355-k Hz Frequency Setting - Auto-skip Light Load Operation (TPS51275, and TPS51275C) - OOA Light Load Operation (TPS51275B) - Internal 0.8-ms Voltage Servo Soft-Start - Low-Side RDS(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 - Tablet puters DESCRIPTION The TPS51275, TPS51275B and TPS51275C are cost-effective, dual-synchronous buck controllers targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external ponents. The 260-k Hz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency. The TPS51275, TPS51275B and TPS51275C supports high efficiency, fast transient response and provides a bined power-good signal. Adaptive on-time, DCAP™ control provides convenient and efficient operation. The device operates with supply input voltage ranging from 5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51275, TPS51275B and TPS51275C are available in a 20pin, 3 mm x 3 mm, 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 DEVICE NUMBER ENABLE FUNCTION SKIP MODE ALWAYS On-LDO PACKAGE OUTPUT SUPPLY QUANTITY TPS51275RUKR TPS51275RUKT Auto-skip VREG3 Tape and Reel Mini reel 3000 250 TPS51275BRUKR TPS51275BRUKT TPS51275CRUKR...