3.3V, 5.0V, 12V, 15V, and Adjustable Output VersionsAdjustable Version Output Voltage Range, 1.23 to 37V+/- 4%. Maximum Over Line and Load Conditions
Guaranteed 3.0A Output Current
Wide Input Voltage Range
Requires Only 4 External Components
150Khz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby Mode
Uses Readily Available Standard Inductors
Thermal Shutdown and Current Limit Protection
Moisture Sensitivity Level(MSL) Equals1
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
DESCRIPTION ORDERING INFORMATION
The LM2596 series of regulators are monolithic integratedcircuits ideally suited for easy and convenient design of astep-down switching regualtor(buck converter).All circuits of this series are capable of driving a 3.0A loadwith excellent line and load regulation.
These devices areavailable in fixed output voltages of 3.3V, 5.0V,12V, 15V,and an adjustable output version.These regulatiors were designed to minimize the number of externalcomponents to simplify thepower supply design.
Standard series of inductors optimized for use with the LM2576 are offeredby several different inductor manufacturers.Since the LM2596 converter is a switch-mode power supply, its efficiency is significantly higher incomparison with popular three-terminal limear reguators, especially with higher input voltages.available from several different manufacturers.
This feature greatly simplifies the design ofswitch-mode power supplies. The LM2596 features include a guaranteed +/- 4% toleranceon output voltage within specified input voltages and output load conditions, and +/-15% on theoscillator frequency (+/- 2% over 0oC to 125 oC).
External shutdown is included, featuring 80 uA(typical) standby current. The output switch includescycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions.
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