EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX77801 5.5V Input, 2A, High-Efficiency Buck-Boost Converter General Description Benefits and Features The MAX77801 is a high-efficiency, step-up/step-down V Range: 2.30V to 5.5V IN (buck-boost) converter targeted for single-cell, Li-ion 2 V Range: 2.60V to 4.18V (I C Programmable in OUT battery-powered applications. The device maintains a 12.5mV Steps) regulated output voltage from 2.6V to 4.18V across an Up to 2A Output Current in Boost Mode (V = 3.0V, IN input voltage range of 2.3V to 5.5V. The device supports V = 3.4V) OUT up to 2A of output current in boost mode and up to 3A in buck mode. Up to 3A Output Current in Buck Mode The device seamlessly transitions between buck and Up to 97% Peak Efficiency boost modes. A unique control algorithm allows high-effi- SKIP Mode for Optimal Light Load Efficiency ciency and outstanding load and line-transient response. 55A (typ) Low Quiescent Current Dedicated enable and power-OK pins allow simple hard- 2 3.4MHz High-Speed I C Serial Interface 2 ware control. An I C serial interface is optionally used for Dynamic Voltage Scaling (DVS) Function dynamic voltage scaling, system power optimization, and fault read-back. Power-OK Output The MAX77801 is available in a 20-bump, 1.83mm x 2.5MHz Switching Frequency 2.13mm wafer-level package (WLP) and also 20-pin, Protection Features 4mm x 4mm TQFN. Soft-Start Thermal Shutdown Applications Overvoltage Protection Single-Cell, Li-Ion Battery-Powered Devices Overcurrent Protection Handheld Scanners, Mobile Payment Terminals, 1.827mm x 2.127mm, 20-Bump WLP Security Cameras AR/VR Headsets 4mm x 4mm, 20-Pin TQFN Typical Application Circuit 1H BOOST TO BUCK MAX77801 LINE TRANSIENT RESPONSE LX1 LX2 I = 1.5A OUT IN OUT V = 3.3V DC INPUT VOUT OUT 3.4V 2.3V TO 5.5V 2.6V TO 4.18V 10F 47F 2A (BOOST MODE) V SYS 2.9V FB 500mV/div V IN 3A (BUCK MODE) 1F PGND BOOST BOOST BUCK MODE MODE MODE V IO V OUT 20mV/div SDA SERIAL HOST POK POWER-OK SCL DYNAMIC VOLTAGE ENABLE EN DVS SCALING 100s/div HIGH-EFFICIENCY BUCK-BOOST CONVERTER 2 WITH OPTIONAL I C CONTROL IN TINY 20-BUMP WLP Ordering Information appears at end of data sheet. 19-7515 Rev 5 11/19MAX77801 5.5V Input, 2A, High-Efficiency Buck-Boost Converter Absolute Maximum Ratings SYS, V to GND .................................................-0.3V to +6.0V LX2 to PGND......................................... -0.3V to (V + 0.3V) IO OUT IN, OUT to PGND .................................................-0.3V to +6.0V LX1/LX2 Continuous RMS Current ......................................3.3A PGND to GND ......................................................-0.3V to +0.3V Operating Junction Temperature Range .......... -40C to +125C SCL, SDA to GND .....................................-0.3V to (V + 0.3V) Junction Temperature ......................................................+150C IO EN, DVS, POK to GND ..........................-0.3V to (V + 0.3V) Storage Temperature Range ............................ -65C to +150C SYS FB to GND ............................................. -0.3V to (V + 0.3V) Soldering Temperature (reflow) .......................................+260C OUT LX1 to PGND............................................. -0.3V to (V + 0.3V) IN Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics (Note 1) Junction-to-Ambient Thermal Resistance ( ) JA 20-Bump WLP ........................................................55.49C/W 20-Pin TQFN ...............................................................39C/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Buck-Boost Electrical Characteristics (V = V = +3.8V, V = V = +3.3V, T = -40C to +125C, typical values are at T T = +25C, unless otherwise noted.) (Note 2) SYS IN FB OUT J A J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS GENERAL Input Voltage Range V 2.3 5.5 V IN I EN = low, T = +25C 0.1 SHDN 25C A Shutdown Supply Current A I EN = low, T = +125C 1 SHDN 125C A I SKIP mode, no switching T = -40C to +85C 55 70 A Q SKIP J Input Supply Current I FPWM mode, no load 6 mA Q PWM Active Discharge Resistance R 100 DISCHG Thermal Shutdown T Rising, 20C hysteresis +165 C SHDN H-BRIDGE 2 Output Voltage Range V I C programmable (12.5mV step) 2.60 4.1875 V OUT VOUT DVS L 6:0 = 0x38 3.3 VOUT DVS H 6:0 = 0x40, 3.4 MAX77801EWP only Default Output Voltage V VOUT DVS H 6:0 = 0x5C, 3.75 MAX77801ETP only PWM mode, VOUT DVS x 6:0 = 0x40, V -1.0 +1.0 OUT ACC1 no load T = +25C J Output Voltage Accuracy % SKIP mode, VOUT DVS x 6:0 = 0x40, V -1.0 +4.5 OUT ACC2 no load, T = +25C J Maxim Integrated 2 www.maximintegrated.com