MP5461GC-Z

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 <gt/>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. In a light-load condition, it enters PFM mode to get high light-load efficiency. Integrated MOSFETs minimize the solution size while maintaining high efficiency. Fault protection includes VIN1 OVP shutdown, output hiccup current limiting and thermal shutdown.

• 1µA shutdown current
• 200µA quiescent current
• Active low system EN pin
• EN to OR_OUT start-up delay 300μs
• Over-temperature shutdown

Notes

MPS part numbers ending in "-P" and "-Z" are the same parts. P & Z only indicates reel size.