Qualified for Automotive Applications

Independent Dual-Outputs Operate 180°

Out of Phase

Wide Input Voltage Range: 4.5-V − 28-V

Adjustable Output Voltage Down to 0.9 V

Pin-Selectable PWM/SKIP Mode for High

Efficiency Under Light Loads

Synchronous Buck Operation Allows up to

95% Efficiency

Separate Standby Control and Overcurrent

Protection For Each Channel

Programmable Short-Circuit Protection

Low Supply (1 mA) and Shutdown (1 nA)

Current

Power Good Output

High-Speed Error Amplifiers

Sequencing Easily Achieved by Selecting

Softstart Capacitor Values.

5-V Linear Regulator Power Internal IC

Circuitry

30-Pin TSSOP Packaging

Gate Leakage Test Passing Level is 50 V

description

The TPS5120 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 PWM/SKIP pin allows the operating mode

to switch from PWM mode to skip mode under light load conditions. The skip mode 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. The resistorless current protection and fixed high-side driver voltage simplify the power supply

design and reduce the external parts count. Each channel is independent, offering a separate controller,

overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different

softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage,

undervoltage, and programmable short-circuit protection promote system reliability.