MP5461GC-Z

MP5461 Dual Input, 4-Switch Integrated Buck-Boost Converter with Input ORing and Selection DESCRIPTION FEATURES 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 lightload 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.        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 Continuous Output Current o 1ms Soft-Start Time o Auto PFM/PWM Mode o Output Over-Voltage Protection o 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) APPLICATIONS   USB-C Cable VCONN Powered USB Device 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 2/19/2019 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 1 MP5461 – DUAL INPUT, INTEGRATED BUCK-BOOST TYPICAL APPLICATION Efficiency vs. Load Current L1 1µH VIN1 4.2V-5.5V SW1 VIN2 2.5V-5.5V SW2 IN1 95 OUT C2A 22µF MP5461 C1B 1µF IN2 OR_OUT C4 10µF VCC R1 10k SEL STATUS MP5461 Rev. 1.0 2/19/2019 100 VCC EN AGND GND C2B 22µF 90 EFFICIENCY (%) C1A 1µF VOUT 3.3V/0.5A 85 80 75 VIN2=5V VIN2=3.3V VIN2=2.7V 70 65 C3 1µF 60 0.001 0.01 0.1 LOAD CURRENT (A) www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 1 2 MP5461 – DUAL INPUT, INTEGRATED BUCK-BOOST ORDERING INFORMATION Part Number* Package Top Marking MP5461GC CSP-12 (1.4mmx1.8mm) See Below * For Tape & Reel, add suffix –Z (e.g. MP5461GC–Z). TOP MARKING JG: Product code of MP5461GC Y: Year code LLL: Lot number PACKAGE REFERENCE TOP VIEW 1 2 3 A IN1 OR_ OUT SW 1 B IN2 AG ND GN D C VC C EN SW 2 D SE L STAT US OU T CSP-12 (1.4mmx1.8mm) MP5461 Rev. 1.0 2/19/2019 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 3 MP5461 – DUAL INPUT, INTEGRATED BUCK-BOOST PIN FUNCTIONS CSP-12 Pin # Name A1 IN1 A2 OR_OUT A3 SW1 B1 IN2 B2 AGND B3 GND C1 VCC C2 EN C3 SW2 D1 SEL D2 STATUS D3 OUT MP5461 Rev. 1.0 2/19/2019 Description VIN1 supply voltage. The MP5461 operates from a 4.2V to 5.5V VIN1 voltage and supports a 22V input voltage, but it is not functional >5.75V. CIN1 prevents large voltage spikes at the input. Place CIN1 as close to the IC as possible. IN1, IN2 ORing output. Also functions as the buck-boost input pin. Use a 10μF or larger capacitor for decoupling. Switch1. The first half-bridge switch node is connected to SW1. Connect an inductor between SW1 and SW2. VIN2 supply voltage. The MP5461 operates from a 2.5V to 5.5V VIN2 voltage. CIN2 prevents large voltage spikes at the input. Place CIN2 as close to the IC as possible. Analog ground. Connect AGND to VCC capacitor's GND node by a Kelvin sense trace. Power ground. Reference ground of the regulated output voltage. GND requires extra care during PCB layout. Connect to GND with copper traces and vias. Internal 5V LDO regulator output. Decouple with a 1µF capacitor. On/off control for entire chip. EN is active low. Drive EN high to turn off the chip. Drive EN low or float to turn on the device. It has an internal 600kΩ pulldown resistor to ground. Switch2. The internal second half-bridge switch node is connected to SW2. Connect an inductor between SW1 and SW2. Power path select input. If SEL=Low or is floated, VIN1 is selected; If SEL=High, VIN2 is selected. The MP5461 will auto select the available power path if only one supply is available. It has an internal 600kΩ pull-down resistor to ground. Status indication. Open drain output. Indicates if the VIN1 or VIN2 channel is selected. Refer to the truth table. Output pin. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 4 MP5461 – DUAL INPUT, INTEGRATED BUCK-BOOST ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage (VIN1) ....................-0.3V to +24V VSW1..................................................................... –0.3V (-5V for