illustrate

The TPS54383 and TPS54386 are dual-output, non-synchronous buck converters that support 3-A output applications operating at 4.5 V to 28 V input supply voltages and requiring output voltage capability at 0.8 V and 90% input voltage.

With internally determined operating frequency, soft-start time, and control loop compensation, these converters provide many features with minimal external components. Channel 1 overcurrent protection is set at 4.5, while Channel 2 overcurrent protection level is selected by connecting the pin to ground, BP, or dangling. The setting hierarchy is used to allow the scaling of two outputs that are not required by applications to external components.

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 3A
• Two fixed switching frequency versions:
  • TPS54383: 300 kHz
  • TPS54386: 600 kHz
• Three levels of overcurrent protection (output 2) selectable
• 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
• 85 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
• The 14-pin HTSSOP package will be PowerPAD™
• apply
  • Stb
  • digital television