TPS5120DBTR

Product Summary

The TPS5120DBTR is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The TPS5120DBTR allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skipmode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs.

Parametrics

TPS5120DBTR absolute maximum ratings: (1)Supply voltage, VCC: -0.3 V to 30 V; (2)Input voltage: INV1, INV2, CT, PWM/SKIP, REG5V_IN, SOFTSTART1, SOFTSTART2: -0.3 V to 7 V; FLT, POWERGOOD: -0.3 V to 7 V; STBY1, STBY2, 5V_STBY, TRIP1, TRIP2: -0.3 V to 30 V; (3)Output voltage:LL1, LL2: -1.0 V to 30 V; (4)OUT1_u, OUT2_u: -1.0 V to 35 V; (5)LH1, LH2: -0.3 V to 35 V; (6)OUT1_d, OUT2_d, 5V_OUT, FB1, FB2: -0.3 V to 7 V; (7)REF: -0.3 V to 3 V; (8)OUT1_u, LH1 to LL1: -0.3 V to 7 V; (9)OUT2_u, LH2 to LL2: -0.3 V to 7 V; (10)Power dissipation (TA ≤ 25℃), PD: 874 mW; (11)Operating free-air temperature range, TA: -40℃ to 85℃; (12)Storage temperature range, Tstg: -55℃ to 150℃.

Features

TPS5120DBTR features: (1)Dual-Outputs Operate 180° Out of Phase; (2)Wide Input Voltage Range: 4.5-V to 28-V; (3)Adjustable Output Voltage Down to 0.9 V; (4)Pin-Selectable PWM/SKIP Mode for High Efficiency Under Light Loads; (5)Synchronous Buck Operation Allows up to 95% Efficiency; (6)Separate Standby Control and Overcurrent Protection for Each Channel; (7)Programmable Short-Circuit Protection; (8)Low Supply (1 mA) and Shutdown (1 nA)Current; (9)Power Good Output; (10)High-Speed Error Amplifiers; (11)Sequencing Easily Achieved by Selecting Softstart Capacitor Values; (12)5-V Linear Regulator Power Internal IC Circuitry; (13)30-Pin TSSOP Packaging.

Diagrams