EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX77504 14V Input, 3A High-Efficiency Buck Converter in WLP or QFN General Description Benefits and Features The MAX77504 is a synchronous 3A step-down DC-DC 3A Single-Channel Buck Regulator converter optimized for portable 2-cell and 3-cell battery- 2.6V to 14V Input Voltage operated applications. The converter operates on an input 0.6V to 6V Output Voltage Range supply between 2.6V and 14V. Output voltage is ad- 0.5MHz to 1.5MHz Fixed-Frequency Switching justable between 0.6V and 6V with external feedback re- Options sistors. The device features a low-I SKIP mode that al- High Efficiency, Low I Extends Battery Life Q Q lows excellent efficiency at light loads. The MAX77504 94% Peak Efficiency at 7.4V , 3.3V (2520 IN OUT can be sychronized by driving the FPWM pin with an ex- Inductor) ternal clock. 10A I (12V , 1.8V ) SUP IN OUT Dedicated enable, power-OK, and FPWM pins allow sim- OUT Powers V Automatically (V > 1.7V) for L OUT ple hardware control. The SEL input easily configures Low I Q switching frequency, gain, and output active discharge op- Enable Pin (EN) for Direct Hardware Control tion. Built-in undervoltage lockout (UVLO), output active Extenal Clock Synchronization Is Available Through discharge, cycle-by-cycle inductor current limit, thermal the FPWM/SYNC Pin shutdown, and short-circuit protection ensure safe opera- Power-OK Output (POK) Monitors V Quality (See OUT tion under abnormal operating conditions. Ordering Information) The MAX77504 is offered in a small 1.7mm x 1.7mm, Protection Features 16-bump, 0.4mm pitch wafer-level package (WLP) or a Cycle-by-Cycle Inductor Current Limit 2.5mm x 2.5mm, 12-lead, 0.5mm pitch flip-chip QFN Short-Circuit Hiccup Mode, UVLO, and Thermal (FC2QFN). Shutdown Protection Soft-Start Applications FC2QFN or WLP Package Option 1- to 3-Cell Li+/Li-ion Battery-Powered Devices 2.5mm x 2.5mm (0.6mm max. height) 12-Lead Professional Radio, Handheld Computers FC2QFN, 0.5mm Pitch Mirrorless Cameras, DSLR, and Notebook Computers 1.7mm x 1.7mm (0.7mm max. height) 16-Bump Portable Scanners, POS Terminals, Printers WLP, 0.4mm Pitch, 4 x 4 Array Space-Constrained Portable Electronics All WLP Package Bumps (Except POK) Routeable on a Non-HDI PCB Ordering Information appears at end of data sheet. Simplified Application Circuit EEFFFFIICCIIEENNCCYY vvss.. LLOOAADD MAX77504MAX77504 77..44VV SSUUPPPPLLYY 2.6V TO 14V BST 100 SUP 0.22F DC INPUT 10F L 90 LX VOUT 80 0.6V TO 6V OUT CFF COUT ENABLE EN 3A MAX 70 RTOP V = 5.0V OUT FPWM/SYNC FPWM FB 60 VOUT = 3.3V 50 POWER-OK POK R BOT VOUT = 1.8V R V SEL L 40 SEL 2.2F 30 AGND PGND RSEL CONTROLS: 20 SWITCHING FREQ. ACTIVE DISCHARGE 10 GAIN SKIP MODE 0 0.001 0.01 0.1 1 14V, 3A HIGH-EFFICIENCY BUCK CONVERTER LOAD CURRENT (A) OPTIMIZED FOR 2 OR 3 CELL BATTERY APPLICATIONS 19-100678 Rev 2 7/20 EFFICIENCY (%)MAX77504 14V Input, 3A High-Efficiency Buck Converter in WLP or QFN TABLE OF CONTENTS General Description 1 Applications 1 Benefits and Features 1 Simplified Application Circuit . 1 Absolute Maximum Ratings 6 Package Information . 7 16 WLP . 7 12 FC2QFN . 8 Electrical Characteristics . 9 Typical Operating Characteristics . 12 Bump/Pin Configurations . 17 16 WLP 17 12 FC2QFN 17 Bump/Pin Descriptions 18 Detailed Description 19 Buck Regulator Control Scheme 19 Mode Control (FPWM) 20 SKIP Mode 20 FPWM Mode . 20 External Clock Synchronization (SYNC) 20 Buck Enable Control (EN) . 21 V Regulator 21 L Soft-Start 21 Power-OK (POK) Output 21 Output Voltage Connection (OUT) . 22 Configuration Selection Resistor (SEL) . 22 Active Discharge Resistor . 22 Short-Circuit Protection and Hiccup Mode . 22 Thermal Shutdown . 22 Applications Information . 23 Buck Enable Options . 23 Always-On . 23 Hardware Control . 23 FPWM/SYNC Clock Pulse Width Requirements 23 Design Procedure (Choosing R ) . 24 SEL Switching Frequency Selection . 25 Example A (9V to 3.3V ) . 25 IN OUT Example B (12V to 1.8V ) 25 IN OUT www.maximintegrated.com Maxim Integrated 2