STMicroelectronics L6920DC High-Efficiency Step-Up Converter

The L6920DC from STMicroelectronics is a high-performance, step-up DC-DC converter specifically designed to meet the power management requirements of battery-powered systems. With its ability to provide a stable and efficient voltage boost, the L6920DC is an ideal choice for portable devices where extended battery life is critical.

This advanced power solution integrates a fixed-frequency PWM controller with a 0.8 MHz switching frequency, allowing for the use of small external components. The compact footprint and low power consumption make it particularly well-suited for space-constrained applications such as mobile phones, digital cameras, and personal media players.

The L6920DC operates over a wide input voltage range from 0.8V to 5.5V, enabling it to function with single-cell lithium-ion batteries or multi-cell alkaline/NiCd/NiMH batteries. Its high efficiency, which can reach up to 96%, is achieved through an internal synchronous rectifier and the absence of an external Schottky diode. This feature not only enhances efficiency but also reduces overall system cost.

Additional features of the L6920DC include:

• Low quiescent current, which is particularly beneficial in prolonging battery life when the device is in standby mode.
• Low noise operation due to its constant frequency PWM control which is essential for RF and audio-sensitive applications.
• Automatic transition into power-save mode during light-load conditions to maintain high efficiency across the full load range.
• Thermal shutdown and overcurrent protection to ensure safe operation under abnormal operating conditions.
• An enable function that allows for easy integration into system power management schemes.

The L6920DC is available in a small 5-pin TSOT23 package, which is optimal for portable applications where size is a crucial factor. Its robust design and comprehensive protection features make it a reliable and efficient solution for a wide range of portable and wearable electronics.

In summary, the STMicroelectronics L6920DC step-up converter is a versatile and efficient solution for any design engineer looking to optimize power management in battery-operated devices.