TECHNICAL DATA
3.0 A, 15 V, Step-Down
Switching Regulator
IL2576-xx
The IL2576 series of regulators are monolithic integrated
circuits ideally suited for easy and convenient design of a step–
down switching regulator (buck 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
TO-220-5L
3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.
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 IL2576 are offered by
several different inductor manufacturers. Since the IL2576
converter is a switch–mode power supply, its efficiency is
TO-263-5L
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.
A standard series of inductors optimized for use with the
ORDERING INFORMATION
IL2576 are available from several different manufacturers. This
feature greatly simplifies the design of switch–mode power
IL2576S
TO-220-5L
supplies. The IL2576 features include a guaranteed ±4% tolerance
IL2576D2
TO-263-5L
on output voltage within specified input voltages and output load
conditions, and ±10% on the oscillator frequency (±2% over 0°C to
T
A
= -40° to 125° C for all packages
125°C). 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.
Features
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3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
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
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
Pin connections
1. Vin
2. Output
3. Ground
4. Feedback
5. ON/OFF
Applications
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Simple High–Efficiency Step–Down (Buck) Regulator
Efficient Pre–Regulator for Linear Regulators
On–Card Switching Regulators
Positive to Negative Converter (Buck–Boost)
Negative Step–Up Converters
Power Supply for Battery Chargers
Rev. 02
IKSEMICON [ IK SEMICON CO., LTD ]
