LT1970

LT1970 500mA Power Op Amp with Adjustable Precision Current Limit FEATURES s s DESCRIPTIO s s s s s s s s s ± 500mA Minimum Output Current Independent Adjustment of Source and Sink Current Limits 2% Current Limit Accuracy Operates with Single or Split Supplies Shutdown/Enable Control Input Open Collector Status Flags: Sink Current Limit Source Current Limit Thermal Shutdown Fail Safe Current Limit and Thermal Shutdown 1.6V/µs Slew Rate 3.6MHz Gain Bandwidth Product Fast Current Limit Response: 2MHz Bandwidth Specified Temperature Range: – 40°C to 85°C The LT®1970 is a ± 500mA power op amp with precise externally controlled current limiting. Separate control voltages program the sourcing and sinking current limit sense thresholds with 2% accuracy. Output current may be boosted by adding external power transistors. The circuit operates with single or split power supplies from 5V to 36V total supply voltage. In normal operation, the input stage supplies and the output stage supplies are connected (VCC to V+ and VEE to V–). To reduce power dissipation it is possible to power the output stage (V+, V–) from independent, lower voltage rails. The amplifier is unity-gain stable with a 3.6MHz gain bandwidth product and slews at 1.6V/µs. The current limit circuits operate with a 2MHz response between the VCSRC or VCSNK control inputs and the amplifier output. Open collector status flags signal current limit circuit activation, as well as thermal shutdown of the amplifier. An enabl...