Dual-tracking-regulator

Description: A MAX634 inverting regulator is combined with a MAX630 to provide a dual tracking ±15 V output from a 12-V battery. The reference for the -15 V output is derived from the positive output via resistors R3 and R4. Both regulators are configured to optimize output power at low battery voltages by lowering the oscillator frequency through the LBR when the battery voltage drops to 8.5 V.

The circuit employs a MAX634 inverting regulator, which is designed to produce a negative output voltage. In this configuration, it works in conjunction with a MAX630 positive voltage regulator to generate a dual output of ±15 V. The positive output voltage is derived directly from the 12-V battery source, while the -15 V output is obtained through a feedback mechanism that utilizes resistors R3 and R4. These resistors form a voltage divider that provides a stable reference voltage for the inverting regulator, ensuring that the negative output remains consistent and tracks the positive output accurately.

To enhance performance, both regulators are equipped with a feature that allows them to adapt to low battery conditions. Specifically, when the battery voltage falls to 8.5 V, the regulators reduce their oscillator frequency via the LBR (Low Battery Regulation) pin. This adjustment helps to maintain adequate output power levels even when the input voltage is low, thereby extending the operational life of the circuit under suboptimal conditions. The design focuses on efficiency and stability, making it suitable for applications where reliable dual voltage outputs are necessary, especially in battery-powered systems.A MAX634 inverting regulator is combined with a MAX630 to provide a dual tracking ±15 output from a 12-V battery. The reference for the -15 V output is derived from the positive output via R3 and R4. Both regulators are set to maximize output power at low battery voltages by reducing the oscillator frequency, via LBR, when "BATT falls to 8.5 V.