LM2825   
Integrated Power Supply 1A DC-DC Converter 		Click link to Download

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

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.

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
WEBENCH Power Designer My Designs

LM2825
 
4.50 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 40.00
V out 1.23 <=  V <= 15.00
I out    A <= 1.00
Ambient Temperature  °C <= 100


What are WEBENCH® tools?

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



MY BRIEFCASE                                     Remove all from My Briefcase 
Click any "Briefcase" icon to add an item

                                              LM2825
Drag-Select for Table Reset Graph
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

Typical Application
*click for larger image


Connection Diagram
click for larger image



Typical Performance
*click for larger image


Paramaters / ValuesLM2825 LM25010 LM2595 LM2598 LM2675 LM3100
Output Current1000 mA 1000 mA 1000 mA 1000 mA 1000 mA 1500 mA
Input Min Voltage4.5, 7, 4.75, 15 Volt 6 Volt 4.5, 7, 4.75, 15 Volt 4.5, 7, 4.75, 15 Volt 6.5, 15 Volt 4.5 Volt
Input Max Voltage40 Volt 42 Volt 40 Volt 40 Volt 40 Volt 36 Volt
Output Min7, 3.3, 1.23, 12, 5 Volt 2.5 Volt 3.3, 1.23, 12, 5 Volt 3.3, 1.23, 12, 5 Volt 3.3, 1.23, 12, 5 Volt 0.8 Volt
Output Max3.3, 12, 15, 8, 5 Volt 37 Volt 3.3, 37, 12, 5 Volt 3.3, 37, 12, 5 Volt 3.3, 12, 37, 5 Volt 7 Volt
Frequency Min150 kHz 50 kHz 150 kHz 150 kHz 260 kHz Undefined kHz
Frequency Max150 kHz 1000 kHz 150 kHz 150 kHz 260 kHz 1000 kHz
Efficiency (peak)80, 78, 81 % 95 % 90, 78, 82 % 90, 78, 82 % 90, 94, 86 % 86 %
On/Off PinYes Yes Yes Yes Yes Yes
Error FlagNo No No Yes No No
SoftStartYes Yes No Yes No Yes
Sync PinNo No No No No No
InvertingNo Yes Yes Yes No
FlybackNo No No No No No
RegTypeSwitching Regulator Switching Regulator Switching Regulator Switching Regulator Switching Regulator Switching Regulator
Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C -40 deg C -40 deg C
Temperature Max125 deg C 125 deg C 125 deg C 125 deg C 125 deg C 125 deg C
Adjustable OutputNo, Yes Yes Yes, No Yes, No Yes, No Yes
Adj Switch FrequencyNo Yes No No No Yes
PWM ModeVoltage Constant on-time Voltage Voltage Voltage with Vin Feedforward Constant on-time
TopologyBuck Buck Buck Buck Buck Synchronous Buck
Special FeaturesTotally integrated switching power supply, no external components Ultra-fast transient response SIMPLE SWITCHER regulator SIMPLE SWITCHER regulator, error output delay Internal Type 3 compensation, 1.5% output voltage accuracy, SIMPLE SWITCHER regulator Vin feed forward and Current Injection compensation, SIMPLE SWITCHER synchronous regulator
Step-DownNo, Yes Yes Yes Yes Yes Yes
Multiple Output CapabilityNo No No No No No
Output PowerUndefined Watt Undefined Watt Undefined Watt Undefined Watt Undefined Watt Undefined Watt
Output VoltageUndefined, 3.3, 12, 5 Volt Undefined Volt 3.3, Undefined, 12, 5 Volt 3.3, Undefined, 12, 5 Volt 3.3, 12, Undefined, 5 Volt Undefined Volt
Output Range12V, 3.3V, 1.23V to 8V, 5V, 7V to 15V 2.5V to 37V 5V, 12V, 1.23V to 37V, 3.3V 5V, 12V, 1.23V to 37V, 3.3V 12V, 1.23V to 37V, 3.3V, 5V 0.8V to 7V
Switching Frequency150 kHz 1000 kHz 150 kHz 150 kHz 260 kHz 1000 kHz
Feedback VoltageUndefined Volt 2.5 Volt Undefined Volt
Regulator FamilyUndefined Undefined SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER SIMPLE SWITCHER
Synchronous RectificationNo No No No No Yes

Datasheet
TitleSizeDateOther
Language
LM2825 Integrated Power Supply 1A DC-DC Converter633
Kbytes		23-May-97日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1038: Application Note 1038 LM2825 Application Information Guide332
Kbytes		20-Sep-02日本語
AN-1061: Application Note 1061 Power Conversion in Line-Powered Equipment162
Kbytes		1-Oct-02日本語


More Application Notes
TitleSizeDateOther
Language
AN-1218: Application Note 1218 LM2791/2/4/5 Evaluation Board424
Kbytes		13-May-04 
AN-1251: Application Note 1251 Switched Capacitor Circuits Provide Efficient and Functional White LED Drive55
Kbytes		26-Sep-02 
AN-1321: Application Note 1321 LM2796 Evaluation Board453
Kbytes		25-May-04 
AN-1278: Application Note 1278 LM2793 Evaluation Board213
Kbytes		23-Mar-04 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2825HN-ADJ/NOPB
LM2825HN-ADJ

RoHS



MDIP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide173
AVNET-EMWorldwide8
DIGIKEYWorldwide29
FUTUREWorldwide12
RS COMPONENTSWorldwide6
$22.30 each at 1K+ pcsrail
of
12
LM2825N-12/NOPB

RoHS



MDIP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide3
AVNET-EMWorldwide21
DIGIKEYWorldwide18
FUTUREWorldwide3
RS COMPONENTSWorldwide6
$22.30 each at 1K+ pcsrail
of
12
LM2825N-3.3/NOPB

RoHS



MDIP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide6
AVNET-EMWorldwide25
DIGIKEYWorldwide19
FUTUREWorldwide141
$22.30 each at 1K+ pcsrail
of
12
LM2825N-5.0/NOPB
LM2825N-5.0

RoHS



MDIP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide44
AVNET-EMWorldwide77
DIGIKEYWorldwide0
FARNELLEurope and Asia1456
FUTUREWorldwide1100
NEWARKAmericas77
RS COMPONENTSWorldwide17
$22.30 each at 1K+ pcsrail
of
12
LM2825N-ADJ/NOPB
LM2825N-ADJ

RoHS



MDIP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide36
AVNET-EMWorldwide8
DIGIKEYWorldwide96
FUTUREWorldwide24
RS COMPONENTSWorldwide8
$22.30 each at 1K+ pcsrail
of
12

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM2825HN-ADJ/NOPB
LM2825HN-ADJ
MDIP241
1		NA
NA		RoHSDownloadN/A
@SIMPLE SWITCHERTM
ZXXYYTT
LM2825HN-ADJ
ADJ, 1A OUTPUT
LM2825N-12/NOPB
MDIP241NARoHSDownloadN/A
@SIMPLE SWITCHERTM
ZXXYYTT
LM2825N-12
12V, 1A OUTPUT
LM2825N-3.3/NOPB
MDIP241NARoHSDownloadN/A
@SIMPLE SWITCHERTM
ZXXYYTT
LM2825N-3.3
3.3V, 1A OUTPUT
LM2825N-5.0/NOPB
LM2825N-5.0
MDIP241
1		NA
NA		RoHSDownloadN/A
@SIMPLE SWITCHERTM
ZXXYYTT
LM2825N-5.0
5.0V, 1A OUTPUT
LM2825N-ADJ/NOPB
LM2825N-ADJ
MDIP241
1		NA
NA		RoHSDownloadN/A
@SIMPLE SWITCHERTM
ZXXYYTT
LM2825N-ADJ
ADJ, 1A OUTPUT

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2825HN-ADJLB30003366400383050011086914834
LM2825N-12LB30003366400383050011086914834
LM2825N-3.3LB30003366400383050011086914834
LM2825N-5.0LB30003366400383050011086914834
LM2825N-ADJLB30003366400383050011086914834

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.


[Information as of 21-Nov-2009]