FEATURES
? 3.3V, 5V, 12V, and adjustable output versions
? Adjustable version output voltage range, 1.2V to 37V± 4% max over line and load conditions
? Guaranteed 3A output load current
? Input voltage range up to 40V
? Requires only 4 external components
? Excellent line and load regulation specifications
? 150kHz fixed frequency internal oscillator
? TTL shutdown capability
? Low power standby mode, IQ typically 100μA
? Thermal shutdown and current limit protection APPLICATIONS
? Simple high-efficiency step-down regulator
? On-card switching regulators
? Positive to negative converter
GENERAL DESCRIPTION
The CBM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down switching regulator, capable of driving a 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use.
The CBM2596 series operates at a switching frequency of 150kHz. Available in standard 5-lead TO-220 package. Other features include a guaranteed ± 4% tolerance on output voltage under specified input voltage and output load conditions, and ± 15% on the oscillator frequency. External shutdown is included, featuring typically 100μA standby current. Self protection features include a two stage frequency reducing current limit for output switch and an over temperature shutdown for complete protection under fault conditions. The over temperature shutdown level is about 145℃ with 5℃ hysteresis.
