onsemi Voltage Regulators - DC DC Switching Regulators ML4769ES

The ML4769ES is a continuous conduction boost regulator designed for DC to DC conversion in multi-cell battery power systems. It operates efficiently with input voltages as low as 1.8V and can output adjustable voltages between 3.0V and 5.5V using an external resistor divider. The device features a maximum switching frequency exceeding 200kHz, enabling the use of small, cost-effective inductors. This regulator incorporates an integrated synchronous rectifier, which eliminates the need for an external Schottky diode and reduces forward voltage drop, enhancing conversion efficiency. It achieves efficiencies close to 85%, even at light loads, due to its low quiescent current and variable frequency operation. The ML4769ES also includes a shutdown (SHDN) input that isolates the load from the battery when not in use, contributing to overall system efficiency. The device is packaged in an 8-pin SOIC format and is rated for operation in a temperature range of -20¬8C to 70¬8C. It requires minimal external components, making it suitable for compact designs. The peak switch current is rated at 2A, with an average switch current of 1A, providing robust performance for various applications.