Analog DevicesMAX77505AEFB+TDC/DC-Wandler und Spannungsregler-Chip

MAX77505: 16V Input, 4.6A Switching Current Low IQ Buck Converter

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 MAX77505 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).

Key Features and Benefits

• •  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 7.6VIN, 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)

Applications

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

Evaluation Board

The MAX77505 can be evaluated with the MAX77505EVKIT.

Block Diagrams and Tables