CBM2576HVS-3.3/5.0/12/ADJ
OPERATION INSTRUCTION
FEATURES
APPLICATIONS
3.3 V, 5.0 V, 12 V, and Adjustable Output
Simple High-Efficiency Step-Down (Buck)
Regulator
Versions
Adjustable version output voltage range,
1.23V
Efficient
Pre-Regulator
for
Linear
Regulators
to 57V 土 4% max over line and load
conditions
On-Ca「d Switching Regulators
Positive to Negative
(Buck-Boost)
Negative Step-Up Converters
Power Supply for Battery Chargers
Converter
Output load current: 3A
Input voltage range up to 60V
Requires only 4 external components
52 kHz fixed frequency internal oscillator
TTL shutdown capability, low power
standby mode
High efficiency
Thermal shutdown and current limit
protection
Built-in switching transistor on chip
5-lead T0-220 package
GENERAL DESCRIPTION
The CBM2576HVSseries of regulators are monolithic integrated circuits that provide all the
active functions for a step-down (buck) switching regulator, capable of driving 3A load with
excellent line and load regulation. These devices are available in fixed output voltages of 3.3V,
5.0V, 12V, and adjustable output version. Requiring a minimum number of external components,
these regulators are simple to use and include internal frequency compensation and a
fixedfrequency oscillator.
The CBM2576HVSseries offers a high-efficiency replacement for popular three-terminal
linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink
is required. A standard series of inductors optimized for use with the CBM2576HVSare available
from several different manufacturers. This feature greatly simplifies the design of switch-mode
power supplies.
Other features include a guaranteed 士 4% tolerance on output voltage within specified input
voltages and output load conditions, and 士 10% on the oscillator frequency. The external
shutdown function can be controlled by logic level and then come into standby mode. The
output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full
protection under fault conditions.
The CBM2576HVSseries a「e available in a standard 5-lead T0-220 package.
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