EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX77533 14V Input, 1.5A High-Efficiency Buck Converter with 9A I SUP General Description Benefits and Features The MAX77533 is a synchronous 1.5A step-down DC-DC 1.5A Single Channel Buck Regulator converter optimized for portable 2-cell and 3-cell battery- 3V to 14V Input Voltage Range operated and USB-C applications. The converter operates Output Voltage Range 2 on an input supply between 3V and 14V. Output voltage 0.8V to 5V I C Programmable in 50mV Steps is adjustable between 0.8V and 5V in 50mV steps through Internal Feedback 2 an I C serial interface (internal feedback) or 0.8V to 99% 1.2V, 1.8V, or 3.3V Factory Preset Options Internal of the supply voltage with external feedback resistors. Feedback Factory-programmed default voltages of 1.2V, 1.8V, and 0.8V to 99%V with External Feedback SUP 3.3V with internal feedback are offered to reduce compo- Resistors nent count for common rails. The device features a low-I Q High-Efficiency, Low Supply Current Extends Battery SKIP mode which allows excellent efficiency at light loads. Life Dedicated enable and power-OK (POK) pins allow simple 94% Peak Efficiency at 7.4V , 3.3V (2520 SUP OUT 2 hardware control. An I C serial interface is optionally used Inductor) for full configuration and control for dynamic voltage scal- 9A I (12V , 1.8V Internal Feedback SUP SUP OUT ing and system power optimization. Version) Selectable Light-Load SKIP and Forced-PWM Built-in undervoltage lockout (UVLO), output active dis- Modes charge, cycle-by-cycle current limit, thermal shutdown, and short-circuit protection ensure safe operation under 1MHz or 550kHz Fixed-Frequency Switching abnormal operating conditions. Hardware or Software Control Enable Input and Power-OK Output Pins The MAX77533 is available in a 12-bump, 0.4mm pitch 2 Optional I C Full Control Interface wafer-level package (WLP). Protection Features Cycle-by-Cycle Inductor Peak Current Limit Applications Short-Circuit Hiccup Mode, UVLO, and Thermal 2-cell/3-cell High Power Density Supplies Shutdown Protections Portable Li+/Li-ion Battery Powered Devices 1ms Default Soft-Start Drones, HD Cameras, and Notebook Computers Space-Constrained Portable Electronics Small Size 1.85mm x 1.4mm (0.7mm max. height) WLP 12-Bump, 0.4mm Pitch, 3 x 4 Array Ordering Information appears at end of data sheet. Simplified Application Circuit EFFICIENCY vs. LOADEFFICIENCY vs. LOAD MAX77533MAX77533 7.4V SUPPLY, 2520 INDUCTOR CASE SIZE7.4V SUPPLY, 2520 INDUCTOR CASE SIZE 100 3V TO 14V SUP BST 0.22F DC INPUT 90 4.7F L LX V OUT 80 C 1.5A MAX OUT OUT 70 EN 60 HARDWARE V = 5.0V (EXT FB) OUT BIASEN POK POWER-OK 50 OR SOFTWARE V = 3.3V (INT FB) OUT SDA ENABLE 40 V = 1.8V (INT FB) VL OUT SCL V = 1.2V (INT FB) OUT 2.2F 30 FEEDBACKFEEDBACK VV RANGERANGE V OUT = 0.8V (INT FB) OUTOUT AGND PGND 20 INTERNAL 0.8V TO 5V EXTERNAL 0.8V TO 99%V 10 SUP SKIP MODE 0 0.00001 0.0001 0.001 0.01 0.1 1 10 14V, 1.5A HIGH-EFFICIENCY BUCK CONVERTER OPTIMIZED FOR 2 OR 3 CELL BATTERY APPLICATIONS LOAD CURRENT (A) 19-100790 Rev 2 5/21 EFFICIENCY (%)MAX77533 14V Input, 1.5A High-Efficiency Buck Converter with 9A I SUP TABLE OF CONTENTS General Description 1 Applications 1 Benefits and Features 1 Simplified Application Circuit . 1 Absolute Maximum Ratings 6 Package Information . 6 12 WLP . 6 Electrical Characteristics . 8 Typical Operating Characteristics . 12 Bump Configuration . 17 12 WLP 17 Bump Descriptions . 17 Detailed Description 18 Buck Regulator Control Scheme 18 Mode Control . 19 SKIP Mode 19 FPWM Mode . 19 Buck Enable Control (EN) . 20 Bias Enable Control (BIASEN) 20 V Regulator 20 L Soft-Start 20 Power-OK (POK) Output 21 Peak Inductor Current Limit 21 Active Discharge Resistor . 21 Short-Circuit Protection and Hiccup Mode . 21 Thermal Shutdown . 21 Register Reset Condition 21 2 I C Serial Interface . 22 Register Map 23 MAX77533 . 23 Register Details . 23 Applications Information . 25 Buck Enable Options . 25 Always-On . 25 Hardware Control . 25 Software Control 25 SUP Capacitor Selection 26 Output Capacitor Selection 26 Inductor Selection 27 www.maximintegrated.com Maxim Integrated 2