The document details methods for increasing the output current capability of linear regulators. It presents a simple paralleling configuration using ballast resistors and a more complex logic-controlled shutdown circuit that extends the capacity of the LT1005 to 12A while maintaining stability features.
Additionally, the note covers power dissipation control strategies. It describes switched-mode loops that servo-control voltage across the regulator to minimize heat generation without sacrificing linear performance or transient response. The text also includes a high-voltage regulator design capable of delivering 100V at 100mA with short-circuit protection.
Two regulators are used with small value resistors to provide ballast, which accounts for differing output voltages and achieves an output current equal to their sum.
The 100°C thermo-switch disables the LT1005 to limit dissipation and should be mounted on Q1's heat sink.