EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX77816 High-Efficiency Buck-Boost Regulator with 5A Switches General Description Benefits and Features The MAX77816 is a high-current, high-efficiency Buck and Boost Operation Including Seamless buck-boost regulator targeting single-cell Li-ion battery- Transition between Buck and Boost Modes powered applications. It supports a wide output voltage 2.3V to 5.5V V Range IN range from 2.60V to 5.14V. The IC allows 5A (typ) maxi- 2.60V to 5.14V V with 20mV Step OUT mum switch current. In buck mode, the output current can 3A Minimum Continuous Output Current go as high as 4A, and in boost mode, the maximum out- (V 3.0V, V = 3.3V) INBB OUTBB put current can be 3A. A unique control algorithm allows Burst Current: 3.6A Minimum Output Current for high efficiency, outstanding line/load transient response, 800s (V 3.0V, V = 3.3V) INBB OUTBB and seamless transition between buck and boost modes. 2 I C Serial Interface Allows Dynamic V OUT 2 The IC features an I C-compatible serial interface. The Adjustment and Provides Design Flexibility 2 I C interface allows the output voltage to be dynamically 97.5% Peak Efficiency adjusted, thus enabling finer control of system power con- 2 40A Quiescent Current sumption. The I C interface also provides features such as enable control and device status monitoring. Safety Features Enhance Device and System Reliability The multifunction GPIO pin is register settable to 5 Soft-Start different options, such as FPWM mode enable and induc- True Shutdown tor peak current level selection. These options provide Thermal Shutdown and Short-Circuit Protection design flexibility that allows the IC to cover a wide range of applications and use cases. Multifunction GPIO Pin MAX77816A/F: FPWM Mode Enable Applications MAX77816B: Inductor Peak Current-Limit selection Smartphones and Tablets MAX77816C: Output Voltage Selection Wearable Devices MAX77816D: Power-OK indicator Wireless Communication Devices MAX77816E: Interrupt Indicator RF Power Amplifiers Small Size: 1.827mm x 2.127mm, 20-Bump WLP, Battery-Powered Applications 0.4mm Pitch Typical Application Circuit 1H LXBB 1 LXBB 2 INBB OUTBB V V IN OUT 10F 47F SYS FB BB MAX77816 1F 1.8V PGNDBB REQUIRED WHEN GPIO IS CONFIGURED AS OUTPUT EN 1.5k 1.5k 1.8V SDA GPIO 100k SCL GND Ordering Information appears at end of data sheet. True Shutdown is a trademark of Maxim Integrated Products, Inc. 19-100055 Rev 4 7/20MAX77816 High-Efficiency Buck-Boost Regulator with 5A Switches Absolute Maximum Ratings SYS to GND .........................................................-0.3V to +6.0V LXBB to PGND (Pulsed < 5ns Voltage) .................-2.4V to 8.0V INBB, OUTBB to PGNDBB ..................................-0.3V to +6.0V LXBB1/LXBB2 Continuous RMS Current (Note 1) ..............4.8A PGNDBB to GND .................................................-0.3V to +0.3V Operating Temperature Range ........................... -40C to +85C SCL, SDA to GND .................................. -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C SYS EN, GPIO to GND .................................. -0.3V to (V + 0.3V) Storage Temperature Range ............................ -65C to +150C SYS FB BB to GND ...................................-0.3V to (V + 0.3V) Soldering Temperature (reflow) .......................................+260C OUTBB LXBB1 to PGNDBB ............................... -0.3V to (V + 0.3V) Continuous Power Dissipation at T = +70C INBB A LXBB2 to PGNDBB ............................-0.3V to (V + 0.3V) (Derate 23.8mW/C above +70C) ...........................1905mW OUTBB Note 1: LXBB1/LXBB2 node has internal clamp diodes to PGNDBB and INBB. Applications that give forward bias to these diodes should ensure that the total power loss does not exceed the power dissipation limit of IC package. 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 2) Junction-to-Ambient Thermal Resistance ( ) .........55.49C/W JA Note 2: 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. Electrical Characteristics (V = V = +3.8V, V = V = +3.3V, T = -40C to +85C, typical values are at T = +25C, unless otherwise noted.) SYS INBB FB BB OUTBB A A (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS GENERAL Input Voltage Range V 2.3 5.5 V INBB I EN = low, T = +25C 1 SHDN 25C A Shutdown Supply Current A I EN = low, T = +85C (Note 5) 1 SHDN 85C A I SKIP mode, no switching 40 60 A Q SKIP 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 (20mV step) 2.60 5.14 V OUT MAX77816A only, VOUT 6:0 = 0x28 3.4 Default Output Voltage V MAX77816B/C/D/E/F, VOUT 6:0 = 0x23 3.3 V PWM mode, no load -1.0 +1.0 OUT ACC1 Output Voltage Accuracy % V SKIP mode, no load, T = +25C -1.0 +4.5 OUT ACC2 A Line Regulation V = 2.3V to 5.5V 0.200 %/V INBB Load Regulation (Note 4) 0.125 %/A I = 1.5A, V changes from 3.4V OUT INB V OS1 Line Transient Response to 2.9V in 25s (20mV/s), L = 1H, 50 mV V US1 C = 47F (Note 4) OUT NOM Maxim Integrated 2 www.maximintegrated.com