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MAX77540 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX77540 Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 55 page  General Description The MAX77540 is a high-efficiency step-down converter with two 3A switching phases. It uses an adaptive COT (constant on-time) current-mode control architecture and the two 3A switching phases can be configured as either one (2Φ, 6A) or two (1Φ, 3A each) outputs. Its wide input voltage range enables a direct conversion for sub-1V out- puts from 3-cell Li+ batteries, USB PD, and 12VDC supply rails. The output voltages are preset with resistors and are further adjustable through an I2C-compatible interface. With 94% peak efficiency, low quiescent current, and com- pact solution size, the MAX77540 is ideal for battery pow- ered, space-constraint equipment. Programmable switching frequency, frequency tracking, spread-spectrum, and ultrasonic mode allow easier sys- tem optimization for noise-sensitive applications. Dedicat- ed EN, POK, and FPWMB pins provide options for direct hardware control, while more programmable options, such as soft-start/stop and ramp-up/down slew-rates, are avail- able through I2C. An array of built-in protections insures safe operation under abnormal operating conditions. Applications ● 2/3-Cell Li+ and USB-C Power Delivery Systems ● Audio and Video Equipment ● Microprocessors, field-programmable gate arrays (FPGAs), digital signal processors (DSPs), and application-specific integrated circuits (ASICs) ● Networking and PCIe®/redundant array of inexpensive disks (RAID) Cards Benefits and Features ● 4V to 16V Input Voltage Range ● 0.5V to 5.2V Output Voltage Range ● Resistor Configurable Default VOUT ● Two 3A Bucks (1Φ) or One 6A Buck (2Φ) ● ±0.5% VOUT Accuracy (Default VOUT at 25°C) ● 94% Peak Efficiency (7.6VIN, 3.3VOUT, 1MHz) ● Auto SKIP/PWM and Low-Power Mode ● 98% Max. Duty Cycle Dropout Operation ● Programmable Soft-Start/Stop and Ramp-Up/Down Slew Rates ● Pre-Biased Startup and Active Output Discharge ● Programmable Inductor Peak Current Limits ● 0.5/1.0/1.6MHz Nominal Switching Frequency ● Spread-Spectrum Modulation ● Internal/External Frequency Tracking ● Ultrasonic Mode ● Dedicated EN, POK, and FPWM Pins ● Undervoltage lockout (UVLO), Thermal Shutdown, and Short-Circuit Protection ● High-Speed I2C I/F with 3-Slave Address Options ● 30-WLP (2.51mm x 2.31mm) and 24-FC2QFN (3mm x 3mm) Packages ● Less than 55mm2 Total Solution Size Ordering Information appears at end of data sheet. Typical Applications Circuit VOUT1 (0.5V TO 5.2V, 3A) PGND1 LX1 PGND2 LX2 SNS1 SNS2 SYS IRQB SCL AGND SDA SEL2 1Φ + 1Φ 3A PHASE-CONFIGURABLE (SINGLE or DUAL-OUTPUT) MAX77540 MULTIPHASE BUCK 3A 1+1 CONFIGURATION IN1 2Φ 6A BST1 BST2 SEL1 POK1 POK2 I2C_EN EN1 EN2 VDD VL FPWM2B FPWM1B ADDR VOUTx OR VEXT ALT_IN VIO DC POWER SOURCE (4.0V TO 16V) DC POWER SOURCE (4.0V TO 16V) VOUT2 (0.5V TO 5.2V, 3A) IN2 DC POWER SOURCE (4.0V TO 16V) Click here to ask about the production status of specific part numbers. MAX77540 16VIN/6A, Dual-Phase High-Efficiency Buck Converter 19-101013; Rev 0; 4/21 |
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