LM2825 Datasheet, PDF (1/21 Pages) National Semiconductor (TI) – Integrated Power Supply 1A DC-DC Converter

LM2825
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SNVS127C – MAY 1997 – REVISED APRIL 2013
LM2825 Integrated Power Supply 1A DC-DC Converter
Check for Samples: LM2825
FEATURES
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• Minimum Design Time Required
• 3.3V, 5V and 12V Fixed Output Versions
• Two Adjustable Versions Allow 1.23V to 15V
Outputs
• Wide Input Voltage Range, up to 40V
• Low-Power Standby Mode, I_Q Typically 65 μA
• High Efficiency, Typically 80%
• ±4% Output Voltage Tolerance
• Excellent Line and Load Regulation
• TTL Shutdown Capability/Programmable Soft-
Start
• Thermal Shutdown and Current Limit
Protection
• −40°C to +85°C Ambient Temperature Range
DESCRIPTION
The LM2825 is a complete 1A DC-DC Buck converter
packaged in a 24-lead molded Dual-In-Line integrated
circuit package.
Contained within the package are all the active and
passive components for a high efficiency step-down
(buck) switching regulator. Available in fixed output
voltages of 3.3V, 5V and 12V, as well as two
adjustable versions, these devices can provide up to
1A of load current with fully ensured electrical
specifications.
Self-contained, this converter is also fully protected
from output fault conditions, such as excessive load
current, short circuits, or excessive temperatures.
APPLICATIONS
• Simple High-Efficiency Step-Down (Buck)
Regulator
• On-Card Switching Regulators
• Efficient Pre-Regulator for Linear Regulators
• Distributed Power Systems
• DC/DC Module Replacement
Standard Application
(Fixed output voltage versions)
HIGHLIGHTS
• No External Components Required (Fixed
Output Voltage Versions)
• Integrated Circuit Reliability
• MTBF Over 20 Million Hours
• Radiated EMI Meets Class B Stipulated by
CISPR 22
• High Power Density, 35 W/in³
• 24-pin PDIP Package Profile (1.25 x 0.54 x 0.26
Inches)
Radiated EMI
Radiated emission of electromagnetic fields is
measured at 10m distance. The emission levels are
within the Class B limits stipulated by CISPR 22.
30. . . .230 MHz
230. . . .1000 MHz
1. . . .10 GHz
30 dB μV/m
37 dB μV/m
46 dB μV/m
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
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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