MAX77324

4.8VIN, 1.5A High-Efficiency, Ultra-Small Buck Converter

Ultra-small 6.89mm2 total solution 1.5A buck converter with 93% efficiency for single cell battery applications


Please check latest availability status for a specific part variant.

Description

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. 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).
MAX77324: 1-Cell to Core Voltage Buck Converter Application Circuit MAX77324: 1-Cell to Core Voltage Buck Converter Application Circuit Enlarge+

Key Features

  • 1.5A Output Current Step-down Converter
  • 2.5V to 4.8V VIN Range
  • 0.6V to 2V Adjustable VOUT Range, ±2% Accuracy
  • 93% Peak Efficiency (3.8VIN, 1.8VOUT)
    • SKIP Mode for Higher Light-Load Efficiency
    • 40µA Quiescent Current
    • 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

Applications/Uses

  • 1-Cell Battery Powered Equipment
  • Portable/Wearables
  • Internet of Things (IoT) Devices
  • Space Constrained Equipment
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX77324 2.54.80.62Resistor1.5InternalYes12000EE-Sim
WLP/6
$0.76 @1k
See All Step-Down Switching Regulators (389)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX77324EVKIT: Evaluation Kit for the MAX77324

Quality and Environmental Data

Request Reliability Report for: MAX77324 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

4 Ways to Extend Runtime of Small, Battery-Powered Electronics


Tools & Models

  • EE-Sim: Design & Simulate MAX77324
  • MAX77324 SIMPLIS Schematic
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
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