Create a design and simulate using EE-Sim tools: MAX77756AEWL+T
The MAX77756AEWL+T is a synchronous 500mA step-down DC-DC converter with integrated dual-input power multiplexer (MUX). The converter operates on an input supply as low as 3.0V and as high as 24V. Default output voltage is factory-programmed to either 1.8V, 3.3V, or 5.0V. Output voltage is further adjustable through external resistors or an I2C serial interface.The dual-input power MUX selects the higher voltage from two different input sources to power the step-down converter. Control circuitry ensures that only one channel of the MUX is on at a time to prevent cross-conduction between input sources. For single-input applications, the MUX can be bypassed and the step-down converter can be powered directly from the SUP pin.The MAX77756AEWL+T is available in a small 2.33mm × 1.42mm (0.7mm max height), 15-bump wafer-level package (WLP). For a similar buck converter without a power MUX, refer to the MAX77596.Design Solution: Pack More Power in Your Cool, Small Smart-Home Hub
Feature
- Wide Input Power Supply
- 3V to 24V Supply Voltage
- 500mA (max) Output Current
- 1.8V, 3.3V, or 5.0V Factory-Set VOUT with Optional I2C Control: 1.5V to 7.5V in 50mV Steps
- External Feedback Resistor VOUT Option (1V to 99% VSUP)
- Hardware or Software Enable
- Dual-Input Power MUX Replaces Common-Cathode Diode Arrays
- Automatic Ideal-Diode ORing Voltage Selector
- 250mΩ MOSFETs Minimize Power Consumption, BOM, and Solution Size
- Low IQ Enables Always-On Rails
- 1.5μA Quiescent Current (Only SUP Powered)
- 19μA Quiescent Current (IN1/IN2 Powered)
- 88% Peak Efficiency (12VSUP, 3.3VOUT)
- Safe and Easy to Use
- Short-Circuit and Thermal Protection
- 8ms Soft-Start
- Software-Enabled Spread Spectrum
- Pin-Programmable Inductor Peak Current Level
- Small Size
- 2.33mm × 1.42mm (0.7mm max height) Wafer-Level Package (WLP)
- 15-Bump, 0.4mm Pitch, 3 × 5 Array
Applications
- Battery-Powered Systems, Backup Battery, Uninterruptible Rails
- Home Automation, Low IQ Smart Hubs
- Notebook and Tablet Computers
- USB Type-C Power Delivery Accessories and Devices
