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LM2594M-5.0 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza LM2594M-5.0
Descripción Electrónicos  LM2594/LM2594HV SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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LM2594M-5.0 Datasheet(HTML) 1 Page - Texas Instruments

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LM2594, LM2594HV
www.ti.com
SNVS118C – DECEMBER 1999 – REVISED APRIL 2013
LM2594/LM2594HV SIMPLE SWITCHER® Power Converter 150 kHz 0.5A Step-Down
Voltage Regulator
Check for Samples: LM2594, LM2594HV
1
FEATURES
DESCRIPTION
The LM2594/LM2594HV series of regulators are
2345
• 3.3V, 5V, 12V, and Adjustable Output Versions
monolithic integrated circuits that provide all the
Adjustable Version Output Voltage Range,
active functions for a step-down (buck) switching
1.2V to 37V (57V for the HV Version)±4% Max
regulator, capable of driving a 0.5A load with
Over Line and Load Conditions
excellent line and load regulation. These devices are
available in fixed output voltages of 3.3V, 5V, 12V,
Available in 8-pin Surface Mount SOIC and
and an adjustable output version, and are packaged
PDIP-8 Package
in a 8-lead PDIP and a 8-lead surface mount SOIC
Ensured 0.5A Output Current
package.
Input Voltage Range up to 60V
Requiring
a
minimum
number
of
external
Requires only 4 External Components
components, these regulators are simple to use and
150 kHz Fixed Frequency Internal Oscillator
feature internal frequency compensation†, a fixed-
frequency oscillator, and improved line and load
TTL Shutdown Capability
regulation specifications.
Low Power Standby Mode, IQ typically 85 μA
The
LM2594/LM2594HV
series
operates
at
a
High Efficiency
switching frequency of 150 kHz thus allowing smaller
Uses Readily Available Standard Inductors
sized filter components than what would be needed
Thermal Shutdown and Current Limit
with lower frequency switching regulators. Because of
Protection
its high efficiency, the copper traces on the printed
circuit board are normally the only heat sinking
needed.
APPLICATIONS
A standard series of inductors (both through hole and
Simple High-efficiency Step-down (Buck)
surface mount types) are available from several
Regulator
different manufacturers optimized for use with the
Efficient Pre-regulator for Linear Regulators
LM2594/LM2594HV
series.
This
feature
greatly
On-card Switching Regulators
simplifies the design of switch-mode power supplies.
Positive to Negative Convertor
Other features include an ensured ±4% tolerance on
output voltage under all conditions of input voltage
and output load conditions, and ±15% on the
oscillator frequency. External shutdown is included,
featuring
typically
85
μA standby current. Self
protection features include a two stage frequency
reducing current limit for the output switch and an
over temperature shutdown for complete protection
under fault conditions.
The LM2594HV is for applications requiring an input
voltage up to 60V.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
Switchers Made Simple is a trademark of Texas Instruments.
3
SIMPLE SWITCHER is a registered trademark of Texas Instruments.
4
Switchers Made Simple is a registered trademark of dcl_owner.
5
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1999–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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