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.
