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LM2576TV-12 Datasheet

  • LM2576TV-12

  • EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGULATOR

  • 27頁

  • MOTOROLA   MOTOROLA

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Advance Information
LM2576
EASY SWITCHER鈩?/div>
3.0 A STEP鈥揇OWN
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
Easy Switcher
鈩?/div>
3.0 A
Step-Down Voltage Regulator
The LM2576 series of regulators are monolithic integrated circuits ideally
suited for easy and convenient design of a step鈥揹own 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 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 LM2576 are offered by several different
inductor manufacturers.
Since the LM2576 converter is a switch鈥搈ode power supply, its efficiency
is significantly higher in comparison with popular three鈥搕erminal 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 LM2576 are
available from several different manufacturers. This feature greatly simplifies
the design of switch鈥搈ode power supplies.
The LM2576 features include a guaranteed
鹵4%
tolerance on output
voltage within specified input voltages and output load conditions, and
鹵10%
on the oscillator frequency (鹵2% over 0擄C to 125擄C). External shutdown is
included, featuring 80
碌A(chǔ)
(typical) standby current. The output switch
includes cycle鈥揵y鈥揷ycle current limiting, as well as thermal shutdown for full
protection under fault conditions.
Features
T SUFFIX
PLASTIC PACKAGE
CASE 314D
Pin 1.
2.
3.
4.
5.
Vin
Output
Ground
Feedback
ON/OFF
1
5
TV SUFFIX
PLASTIC PACKAGE
CASE 314B
Heatsink surface
connected to Pin 3.
1
5
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
Adjustable Version Output Voltage Range, 1.23 to 37 V
鹵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
Heatsink surface (shown as terminal 6 in case outline
drawing) is connected to Pin 3.
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A
(D2PAK)
1
5
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
LM2576鈥?.3
LM2576鈥?
LM2576鈥?2
LM2576鈥?5
LM2576鈥揂DJ
3.3 V
5.0 V
12 V
15 V
1.23 V to 37 V
Applications
Simple High鈥揈fficiency Step鈥揇own (Buck) Regulator
Efficient Pre鈥揜egulator for Linear Regulators
On鈥揅ard Switching Regulators
Positive to Negative Converter (Buck鈥揃oost)
Negative Step鈥揢p Converters
Power Supply for Battery Chargers
ORDERING INFORMATION
Device
LM2576T鈥揦X
LM2576TV鈥揦X
Operating
Temperature Range
Package
Straight Lead
TJ = 鈥?0擄 to +125擄C Vertical Mount
Surface Mount
LM2576D2T鈥揦X
XX = Voltage Option, i.e. 3.3, 5, 12, 15 V; and ADJ for
Adjustable Output.
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
漏
Motorola, Inc. 1997
Rev 0
MOTOROLA ANALOG IC DEVICE DATA
1

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