1 Features

1• 4.5-V to 18-V Input Range

• Output Voltage Range 0.8 V to DMAX × VIN

• Fully Integrated Dual Buck: 1.5 A and 2.5 A

• Three Fixed Switching Frequency Versions:

– TPS54290: 300 kHz

– TPS54291: 600 kHz

– TPS54292: 1.2 MHz

• Integrated UVLO

• 0.8 VREF With 1% Accuracy (0°C to 85°C)

• Internal Soft Start:

– TPS54290: 5.2 ms

– TPS54291: 2.6 ms

– TPS54292: 1.3 ms

• Dual PWM Outputs 180° Out-of-Phase

• Dedicated Enable for Each Channel

• Current Mode Control for Simplified

Compensation

• External Compensation

• Pulse-by-Pulse Overcurrent Protection,

2.2-A and 3.8-A Overcurrent Limit

• Integrated Bootstrap Switch

• Thermal Shutdown Protection at 145°C

• 16-Pin PowerPAD™ HTSSOP Package

2 Applications

• Set-Top Boxes

• Digital TVs

• Power for DSP

• Consumer Electronics

3 Description

The TPS54290, TPS54291, and TPS54292 devices

are dual-output, fully synchronous buck converters

capable of supporting applications with a minimal

number of external components. It operates from a

4.5-V to 18-V input supply voltage, and supports

output voltages as low as 0.8 V and as high as 90%

of the input voltage.

Both high-side and low-side MOSFETs are integrated

to provide fully synchronous conversion with higher

efficiency. Channel 1 can provide up to 1.5 A of

continuous current. Meanwhile, Channel 2 supports

up to 2.5 A.

Current mode control simplifies the compensation.

The external compensation adds flexibility for the

user to choose different type of output capacitors.

180° out-of-phase operation reduces the ripple

current through the input capacitor, providing the

benefit of reducing input capacitance, alleviating EMI

and increasing capacitor life.