MAX77540
RECOMMENDED FOR NEW DESIGNS16VIN/6A, Dual-Phase High-Efficiency Buck Converter
High Efficiency and Power Density Single Step Conversions to Core Voltages from USB-C Rails and Multi cell Batteries
- Part Models
- 4
- 1ku List Price
- Starting From $1.28
Overview
- 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
- 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
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 outputs 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 compact solution size, the MAX77540 is ideal for battery powered, space-constraint equipment.
Programmable switching frequency, frequency tracking, and spread-spectrum allow easier system optimization for noise-sensitive applications. Dedicated EN, POK, and FPWM pins provide options for direct hardware control, while more programmable options, such as soft-start/stop and ramp-up/down slew-rates, are available 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),andapplication-specific integrated circuits (ASICs)
- Networking and PCIe®/redundant array of inexpensive disks (RAID) Cards
Documentation
Video 1
Webcast 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX77540AAFG+ | LFCSP | ||
| MAX77540AAFG+T | LFCSP | ||
| MAX77540AAWV+ | WLCSP | ||
| MAX77540AAWV+T | WLCSP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571E PIN/ERRATA |
||
| MAX77540AAFG+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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Evaluation Kits
Evaluation Kit for the MAX77540 in WLP Package