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LM2825 -
Integrated Power Supply 1A DC-DC Converter
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Features
| • | 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, IQ 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 |
General 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. More...
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 |
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Typical Application
*click for larger image
| Parameters | Values |
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| Output Current |
1000 mA |
| Input Min Voltage |
4.5, 7, 4.75, 15 Volt |
| Input Max Voltage |
40 Volt |
| Output Min |
7, 3.3, 1.23, 12, 5 Volt |
| Output Max |
3.3, 12, 15, 8, 5 Volt |
| Frequency Min |
150 kHz |
| Frequency Max |
150 kHz |
| Efficiency (peak) |
80, 78, 81 % |
| On/Off Pin |
Yes |
| Error Flag |
No |
| SoftStart |
Yes |
| Sync Pin |
No |
| Inverting |
No |
| Flyback |
No |
| RegType |
Switching Regulator |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Adjustable Output |
No, Yes |
| Adj Switch Frequency |
No |
| PWM Mode |
Voltage |
| Topology |
Buck |
| Special Features |
Totally integrated switching power supply, no external components |
| Step-Down |
No, Yes |
| Multiple Output Capability |
No |
| Output Power |
Undefined Watt |
| Output Voltage |
Undefined, 3.3, 12, 5 Volt |
| Output Range |
12V, 3.3V, 1.23V to 8V, 5V, 7V to 15V |
| Switching Frequency |
150 kHz |
| Feedback Voltage |
Undefined Volt |
| Regulator Family |
Undefined |
| Synchronous Rectification |
No |
Typical Performance
*click for larger image
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WEBENCH Live Simulation!
Also Recommended
| LM25010▲ | Thermally Enhanced Package, Higher Efficiency, Higher Operating Frequency & Better Transient Respons |
| LM2595▲ | Thermally Enhanced Package, Higher Efficiency |
| LM2598▲ | Thermally Enhanced Package, Higher Efficiency |
| LM2675▲ | Thermally Enhanced Package, Higher Efficiency And Higher Operating Frequency |
| LM3100▲ | Thermally Enhanced Package, Higher Efficiency, Higher Operating Frequency & Better Transient Respons |
Connection Diagram
click for larger image
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Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
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| LM2825 Integrated Power Supply 1A DC-DC Converter |
633
Kbytes |
23-May-97 |
Download |
LM2825 Integrated Power Supply 1A DC-DC Converter (Japanese)
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340 Kbytes |
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Package Availability, Models, Samples & Pricing
General 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 guaranteed electrical specifications.
Self-contained, this converter is also fully protected from output fault conditions, such as excessive load current, short circuits, or excessive temperatures.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
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LM2825HN-ADJ | LB300 | 0 | 33664 | 0 | 0 | 3830500 | 1 | 1086914834
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LM2825N-12 | LB300 | 0 | 33664 | 0 | 0 | 3830500 | 1 | 1086914834
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LM2825N-3.3 | LB300 | 0 | 33664 | 0 | 0 | 3830500 | 1 | 1086914834
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LM2825N-5.0 | LB300 | 0 | 33664 | 0 | 0 | 3830500 | 1 | 1086914834
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LM2825N-ADJ | LB300 | 0 | 33664 | 0 | 0 | 3830500 | 1 | 1086914834
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Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
Application Notes
| Title | Size in Kbytes |
Date |
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| AN-1038: Application Note 1038 LM2825 Application Information Guide |
332
Kbytes |
20-Sep-02 |
Download |
AN-1038 (Japanese): Application Note 1038 LM2825 Application Information Guide
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376 Kbytes |
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| AN-1061: Application Note 1061 Power Conversion in Line-Powered Equipment |
162
Kbytes |
1-Oct-02 |
Download |
AN-1061 (Japanese): Application Note 1061 Power Conversion in Line-Powered Equipment
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215 Kbytes |
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[Information as of 8-Nov-2009]
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