CBM2576-XX
OPERATION INSTRUCTION
The CBM2576 series of regulators are
FEATURES
monolithic integrated circuits ideally suited
for easy and convenient design of
a
3.3 V, 5.0 V, 12 V, 15 V, and Adjustable
step–down switching regulator (buck
Output Versions
converter). All circuits of this series are
capable of driving a 3.0 A load with excellent
line and load regulation. These devices are
available in fixed output voltages of 3.3 V, 5.0
V, 12 V, 15 V, and an adjustable output
version.
Adjustable Version Output Voltage
Range,1.23 to 37 V ±4%
Maximum Over Line and Load Conditions
Guaranteed 3.0 A Output Current
Wide Input Voltage Range
These regulators were designed to
minimize the number of external components
to simplify the power supply design. Standard
series of inductors optimized for use with the
CBM2576 are offered by several different
inductor manufacturers. Since the CBM2576
converter is a switch–mode power supply, its
efficiency is significantly higher in comparison
with popular three–terminal linear regulators,
especially with higher input voltages. In many
cases, the power dissipated is so low that no
heatsink is required or its size could be
reduced dramatically.
Requires Only 4 External Components
52 kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power
Standby Mode
High Efficiency
Uses Readily Available Standard Inductors
Thermal Shutdown and Current Limit
Protection
APPLICATIONS
A standard series of inductors optimized
for use with the CBM2576 are available from
several different manufacturers. This feature
greatly simplifies the design of switch–mode
power supplies. The CBM2576 features
include a guaranteed ±4% tolerance on
output voltage within specified input voltages
and output load conditions, and ±10% on the
oscillator frequency (±2% over 0℃ to 125℃).
External shutdown is included, featuring 80 ㎂
(typical) standby current. The output switch
includes cycle–by–cycle current limiting, as
well as thermal shutdown for full protection
under fault conditions.
Simple High–Efficiency Step–Down (Buck)
Regulator
Efficient
Pre–Regulator
for
Linear
Regulators
On–Card Switching Regulators
Positive to Negative
(Buck–Boost)
Negative Step–Up Converters
Power Supply for Battery Chargers
Converter
GENERAL DESCRIPTION
1
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