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MP5461 - 4-Switch Integrated Buck-Boost Converter

Description

The MP5461 is a dual input, 4-switch, integrated buck-boost converter.

It is capable of regulating the output voltage from 4.2V to 5.5V VIN1 and 2.5V to 5.5V VIN2.

The VIN1 can support up to 22V input voltage but is not functional after >5.75V.

Features

  • Dual Input ORing Switches: o 4.2V to 5.5V Input Voltage Range for VIN1 o Supports 22V Voltage Stress for VIN1 o 5.75V OVP Shutdown for VIN1 o 2.5V to 5.5V Input Voltage Range for VIN2 o Fast Reverse Block within 2μs o 1A Current Capability for Each Channel o Soft-Start Control o Fast SCP (Short-Circuit Protection) on OR_OUT o Power-Path Selection Input o Power-Path Status Indication.
  • Buck-Boost Converter o 1.8MHz Switching Frequency for CCM o 3.3V Fixed Output Voltage o 500mA Continuo.

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DESCRIPTION The MP5461 is a dual input, 4-switch, integrated buck-boost converter. It is capable of regulating the output voltage from 4.2V to 5.5V VIN1 and 2.5V to 5.5V VIN2. The VIN1 can support up to 22V input voltage but is not functional after >5.75V. The MP5461 has two auto-ORing switches from VIN1 and VIN2 to achieve a stable input for the buck-boost converter. The two sets of ORing MOSFETs are integrated. If one channel power source falls, the fast turn-off protection minimizes the reverse current. The buck-boost converter can operate from an input voltage above, equal to, or below the output voltage. It uses current-mode control with 1.8MHz fixed PWM frequency to optimize stability and transient response.
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