MP5461

New

Dual Input, 4-Switch Integrated Buck-Boost Converter with Input ORing and Selection



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Product 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. 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.

The MP5461 is available in a tiny CSP-12 (1.4mmx1.8mm) package.

Product Features

  • Dual Input ORing Switches:
    • 4.2V to 5.5V Input Voltage Range for VIN1
    • Supports 22V Voltage Stress for VIN1
    • 5.75V OVP Shutdown for VIN1
    • 2.5V to 5.5V Input Voltage Range for VIN2
    • Fast Reverse Block within 2μs
    • 1A Current Capability for Each Channel
    • Soft-Start Control
    • Fast SCP (Short-Circuit Protection) on OR_OUT
    • Power-Path Selection Input
    • Power-Path Status Indication
  • Buck-Boost Converter
    • 1.8MHz Switching Frequency for CCM
    • 3.3V Fixed Output Voltage
    • 500mA Continuous Output Current
    • 1ms Soft-Start Time
    • Auto PFM/PWM Mode
    • Output Over-Voltage Protection
    • Hiccup Over-Current Protection
  • 1µA Shutdown Current
  • 200µA Quiescent Current
  • Active Low System EN Pin
  • EN to OR_OUT Start-Up Delay 300μs
  • Over-Temperature Shutdown
  • Available in a Wafer Level Chip Scale Packaging: CSP-12(1.4mmx1.8mm)

Parametrics

  • Vin (min) (V)Vin1: 4.2 Vin2: 2.5
  • Vin (max) (V)Vin1:5.5 Vin2:5.5
  • Iq (typ) (mA)0.2
  • Regulated Outputs1
  • fsw (max) (kHz)1800
  • GradeCatalog
  • PackageCSP-12(1.4x1.8)
  • Special Features100% Duty Cycle, Fixed Output
  • SSInternal
  • PGNo

Dual Input, 4-Switch Integrated Buck-Boost Converter with Input ORing and Selection

The EV5461-C-00A Evaluation Board is designed to demonstrate the capabilities of MPS’ MP5461, which is a dual input, 4-switch integrated buck-boost converter. It’s 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.

MP5461 has two auto-ORing switches from VIN1 and VIN2 to get a stable input for 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 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. The MP5461 is available.

$25.00 + tax


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All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.