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LM2575D2T-15 Datasheet

  • LM2575D2T-15

  • EASY SWITCHERE⑩ 1.0 A STEP-DOWN VOLTAGE REGULATOR

  • 28頁

  • MOTOROLA   MOTOROLA

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Order this document by LM2575/D
LM2575
Easy Switcher
鈩?/div>
1.0 A
Step-Down Voltage Regulator
The LM2575 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 1.0 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 optimised for use with the LM2575 are offered by several different
inductor manufacturers.
Since the LM2575 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 by the LM2575 regulator is so low, that no heatsink is required or
its size could be reduced dramatically.
The LM2575 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
EASY SWITCHER鈩?/div>
1.0 A STEP鈥揇OWN
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 314D
1
5
Pin 1.
2.
3.
4.
5.
Vin
Output
Ground
Feedback
ON/OFF
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 of 1.23 V to 37 V
鹵4%
Maximum Over Line and Load Conditions
Guaranteed 1.0 A Output Current
Wide Input Voltage Range: 4.75 V to 40 V
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
TV SUFFIX
PLASTIC PACKAGE
CASE 314B
Heatsink surface
connected to Pin 3.
1
5
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A
(D2PAK)
1
5
Heatsink surface (shown as terminal 6 in case outline
drawing) is connected to Pin 3.
Applications
Simple and High鈥揈fficiency Step鈥揇own (Buck) Regulators
Efficient Pre鈥揜egulator for Linear Regulators
On鈥揅ard Switching Regulators
Positive to Negative Converters (Buck鈥揃oost)
Negative Step鈥揢p Converters
Power Supply for Battery Chargers
ORDERING INFORMATION
Device
LM2575T鈥?*
LM2575TV鈥?*
Operating
Temperature Range
Package
Straight Lead
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
LM2575鈥?.3
LM2575鈥?
LM2575鈥?2
LM2575鈥?5
LM2575鈥揂dj
3.3 V
5.0 V
12 V
15 V
1.23 V to 37 V
TJ = 鈥?0擄 to +125擄C Vertical Mount
Surface Mount
LM2575D2T鈥?*
** = Voltage Option, ie. 3.3, 5.0, 12, 15 V and
** =\Adjustable
Output.
漏
Motorola, Inc. 1999
Rev 2, 07/1999
MOTOROLA ANALOG IC DEVICE DATA
1

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