LM2576R ETC1 [List of Unclassifed Manufacturers], LM2576R Datasheet

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LM2576R

Manufacturer Part Number
LM2576R
Description
3.0A, 15V, Step-Down Switching Regulator
Manufacturer
ETC1 [List of Unclassifed Manufacturers]
Datasheet

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circuits ideally suited for easy and convenient design of a
step-down switching regualtor(buck converter).
All circuits of this series are capable of driving a 3.0A load
with excellent line and load regulation. These devices are
available 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 the
power supply design. Standard series of inductors optimized for use with the LM2576 are offered
by several different inductor manufacturers.
comparison with popular three-terminal limear reguators, especially with higher input voltages.
be reduced dramatically. A standard series of inductors optimized for use with the LM2576 are
available from several different manufacturers. This feature greatly simplifies the design of
switch-mode power supplies. The LM2576 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 0oC to 125 oC).
cycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions.
FEATURES
Applications
DESCRIPTION
The LM2576 series of regulators are monolithic integrated
Since the LM2576 converter is a switch-mode power supply, its efficiency is significantly higher in
In many cases, the power dissipated is so low that no heatsink is required or its size could
External shutdown is included, featuring 80 Ua(typical) standby current. The output switch includes
3.3V, 5.0V, 12V, 15V, and Adjustable Output Versions
Adjustable Version Output Voltage Range, 1.23 to 37V
+/- 4% AG10Maximum Over Line and Load Conditions
Guaranteed 3.0A Output Current
Wide Input Voltage Range
Requires Only 4 External Components
52kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby Mode
High Efficiency
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
1
LM2576T-X.X
LM2576TV-X.X
LM2576R
ORDERING INFORMATION
TO-220
TO-263(D2)
TO-220V
Device
LM2576R-X.X
LM2576T-X.X
LM2576T-X.X
Marking
1. Vin
2. Output
3. Ground
4. Feedback
5. On/Off
Package
TO-220V
TO-220
TO-263
HTC

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LM2576R Summary of contents

Page 1

... External shutdown is included, featuring 80 Ua(typical) standby current. The output switch includes cycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions. TO-220 TO-220V TO-263(D2) ORDERING INFORMATION Device LM2576T-X.X LM2576T-X.X LM2576TV-X.X LM2576T-X.X LM2576R LM2576R-X Vin 2. Output 3. Ground 4. Feedback 5. On/Off Marking Package TO-220 TO-220V TO-263 ...

Page 2

Typical Application (Fixed Output Voltage Versions) ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which damage to the device may occur ) Power Dissipation TO-220, 5-Lead Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-case TO-263 Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-case ...

Page 3

OPERATING RATINGS (Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.) ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Vin = 12 ...

Page 4

ELECTRICAL CHARACTERISTICS / Device Parameters (Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin = 25 V for the 12 V version, and Vin = 30 V for the 15 V version. ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 15) 5 HTC ...

Page 6

TYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 15) 6 HTC ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS ] 7 HTC ...

Page 8

HTC ...

Page 9

PIN FUNCTION DESCRIPTION Symbol 1 This pin is the positive input supply for the LM2576 step–down switching Vin regulator.In order to minimize voltage transients and to supply the switching currents needed by the regulator, a suitable input bypass capacitor must ...

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