TPS54291PWPR

ACTIVE

Features for the TPS54291

• 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

• APPLICATIONS

• Set-Top Boxes

• Digital TVs

• Power for DSP

• Consumer Electronics

All other trademarks are the property of their respective owners

Description for the TPS54291

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.