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.