MP5461 Dual Input, 4-Switch Integrated Buck-Boost Converter with Input ORing and Selection DESCRIPTION FEATURES Dual Input ORing Switches: The MP5461 is a dual input, 4-switch, integrated o 4.2V to 5.5V Input Voltage Range for buck-boost converter. It is capable of regulating VIN1 the output voltage from 4.2V to 5.5V VIN1 and o Supports 22V Voltage Stress for VIN1 2.5V to 5.5V VIN2. The VIN1 can support up to o 5.75V OVP Shutdown for VIN1 22V input voltage but is not functional after o 2.5V to 5.5V Input Voltage Range for >5.75V. VIN2 The MP5461 has two auto-ORing switches from o Fast Reverse Block within 2s VIN1 and VIN2 to achieve a stable input for the o 1A Current Capability for Each Channel buck-boost converter. The two sets of ORing o Soft-Start Control MOSFETs are integrated. If one channel power o Fast SCP (Short-Circuit Protection) on source falls, the fast turn-off protection OR OUT minimizes the reverse current. o Power-Path Selection Input o Power-Path Status Indication The buck-boost converter can operate from an Buck-Boost Converter input voltage above, equal to, or below the o 1.8MHz Switching Frequency for CCM output voltage. It uses current-mode control with o 3.3V Fixed Output Voltage 1.8MHz fixed PWM frequency to optimize o 500mA Continuous Output Current stability and transient response. In a light-load o 1ms Soft-Start Time condition, it enters PFM mode to get high light- o Auto PFM/PWM Mode load efficiency. Integrated MOSFETs minimize o Output Over-Voltage Protection the solution size while maintaining high o Hiccup Over-Current Protection efficiency. 1A Shutdown Current Fault protection includes VIN1 OVP shutdown, 200A Quiescent Current output hiccup current limiting, and thermal Active Low System EN Pin shutdown. EN to OR OUT Start-Up Delay 300s The MP5461 is available in a tiny CSP-12 Over-Temperature Shutdown (1.4mmx1.8mm) package. Available in a Wafer Level Chip Scale Packaging: CSP-12(1.4mmx1.8mm) APPLICATIONS USB-C Cable V Powered USB Device CONN All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. MP5461 Rev. 1.0 www.MonolithicPower.com 1 2/19/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. MP5461 DUAL INPUT, INTEGRATED BUCK-BOOST TYPICAL APPLICATION Efficiency vs. Load Current L1 1H VOUT 100 VIN1 3.3V/0.5A SW1 4.2V-5.5V SW2 95 IN1 OUT C1A 90 1F C2A C2B 22F 22F 85 VIN2 MP5461 2.5V-5.5V 80 IN2 OR OUT C1B C4 75 1F 10F VIN2=5V 70 VCC VIN2=3.3V 65 R1 SEL VIN2=2.7V VCC C3 10k 60 1F STATUS EN AGND GND 0.001 0.01 0.1 1 LOAD CURRENT (A) MP5461 Rev. 1.0 www.MonolithicPower.com 2 2/19/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. EFFICIENCY (%)