General Description
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 (RSEL) 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).
Applications
• 2-3 Cell Li+ Battery Applications
• 4-Cell Alkaline Battery Applications
• IoT, Wearable Devices
• Smart Meter, Door Locks, Asset Trackers, etc.
Benefits and Features
• Input Voltage: 2.5V to 16V
• Output Voltage: 0.8V to 5.5V
• Long Battery Life
• 70nA Shutdown Current
• 800nA Ultra-Low Quiescent Current (IQ)
• 86% Efficiency at 100μA Load at 7.6VIN, 3.3VOUT
• 95% Peak Efficiency at 7.6VIN, 3.3VOUT
• 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)