MAX77505 Datasheet

• Input Voltage: 2.5V to 16V
• Output Voltage: 0.8V to 5.5V
• Long Battery Life
  • 70nA Shutdown Current
  • 800nA Ultra-Low Quiescent Current (I_Q)
  • 86% Efficiency at 100μA Load at 7.6V_IN, 3.3V_OUT
  • 95% Peak Efficiency at 7.6V_IN, 3.3V_OUT
• POKB Output (Open-Drain)
• SEL Pin for Output Voltage Selection
• Protections Features
  • Cycle-by-Cycle Inductor Peak Current Limit
  • Short Circuit, Undervoltage Lockout (UVLO), and Thermal Protection
• FC2QFN-10 Package (2.0mm x 2.0mm x 0.55mm)

• 2-3 Cell Li+ Battery Applications
• 4-Cell Alkaline Battery Applications
• IoT, Wearable Devices
• Smart Meter, Door Locks, Asset Trackers, etc.

The MAX77505 is a low-quiescent current (800nA typ), high-efficiency hysteretic buck converter operating from a 2.5V to 16V input voltage range. The device offers high efficiency over the entire load range. Hence, it is ideal for either a primary battery or four alkaline batterypowered applications, which require long standby/idling time with short working time, such as asset tracking and door-lock devices.

A resistor (R_SEL) selects one of thirty preset output voltages between 0.8V and 5.5V. The device has input undervoltage lockout, cycle-by-cycle switch current limit, and thermal shutdown to protect the system and the device itself. The device is available in a 10-lead FC2QFN package (2.0mm x 2.0mm x 0.55mm).