Analog Devices MAX77324 Product Info

• 1.5A Output Current Step-down Converter
• 2.5V to 4.8V V_IN Range
• 0.6V to 2V Adjustable V_OUT Range, ±2% Accuracy
• MAX77324EWTAD+
  • Skip Mode for High Light-Load Efficiency
  • 40µA Quiescent Current
• MAX77324GEWTAD+
  • PWM Mode Only
• 93% Peak Efficiency (3.8V_IN, 1.8V_OUT)
• 1µA Shutdown Current
• 2MHz Nominal Switching Frequency
• Enable Pin for Direct Hardware Control
• Cycle-by-Cycle Inductor Current Limit
• UVLO, Soft-Start, Active Output Discharge, Short-Circuit, and Thermal Shutdown Protections
• 1.22mm x 0.85mm, 6-Bump WLP
  • 6.89mm² Total Solution Area
  • Uses Small 0603 0.47µH Inductor

The MAX77324 is a single channel high-efficiency synchronous step-down (buck) converter capable of delivering up to 1.5A of current. With a 6.89mm² total solution size, up to 93% efficiency, and 40µA quiescent current, it is optimized for portable space constrained battery-operated applications.

The device operates over a 2.5V to 4.8V input voltage range to support Li+ battery powered applications. The output voltage is adjustable from 0.6V to 2V, with a better than 2% accuracy over the whole temperature range. The device uses constant-on-time PWM control scheme. A nominal 2MHz switching frequency reduces the overall solution footprint by use of small 0603 inductor. An automatic SKIP mode is also implemented to improve the light-load efficiency for MAX77324EWTAD+. MAX77324GEWTAD+ operates in PWM mode for all load conditions. The device provides low output voltage ripple, excellent line and load regulation, and transient response. A dedicated enable pin allows for simple hardware control.

Built-in undervoltage lockout (UVLO), soft-start, active output discharge, cycle-by-cycle short-circuit, and thermal shutdown protections insure safe operations under abnormal operating conditions.

The device is available in a space-saving 1.22mm x 0.85mm, 6-bump wafer-level package (WLP).

Applications

• 1-Cell Battery Powered Equipment
• Portable/Wearables
• Internet of Things (IoT) Devices
• Space Constrained Equipment