illustrate

The TPS54283 and TPS54286 are dual-output non-synchronous buck converters that support 2-A output applications with the capability from 4.5 V to 28 V input voltage, and require output voltages at 0.8 V and 90% of the input voltage.

Compensated for internally determined operating frequency, soft-start time, and control loop, these converters offer many features with minimal external components. Channel 1 overcurrent protection is set at 3 A, while Channel 2 overcurrent protection levels are selected by connecting pins to ground, BP, or dangling. The level setting is used to allow external components not to foul applications that require two outputs of full load capability.

characteristic

• 4.5 - V to 28 V input range
• The output voltage range is 0.8 V to 90% of the input voltage
• Output current up to 2 A
• Two fixed switching frequency versions:
  • TPS54283: 300 kHz
  • TPS54286: 600 kHz
• Two selectable levels of overcurrent protection (output 2).
• 0.8 - 1.5% of V, voltage reference
• 2.1 ms internal soft-start
• The dual PWM outputs operate 180° out of phase
• Proportional or sequential start-up modes are selectable by a single pin
• 100 meters Internal high-side MOSFETs
• Current mode control
• Internal compensation (see page 16)
• The pulse is protected by pulse overcurrent
• Thermal shutdown protection at 148°C c
• The 14-pin HTSSOP package will be PowerPAD™
• apply
  • Stb
  • digital television