LM2853 - 3A 550 kHz Synchronous SIMPLE SWITCHER® Buck Regulator from the PowerWise® Family
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Design Tools Application Notes Knowledge Base

Features
•Input voltage range of 3.0V to 5.5V
•Factory EEPROM set output voltages from 0.8V to 3.3V in 100 mV increments
•Maximum load current of 3A
•Voltage Mode Control
•Internal type-three compensation
•Switching frequency of 550 kHz
•Low standby current of 12 µA
•Internal 40 m MOSFET switches
•Standard voltage options 0.8/1.0/1.2/1.5/1.8/2.5/3.0/3.3 volts
•Exposed pad TSSOP-14 package

General Description

The LM2853 synchronous SIMPLE SWITCHER® buck regulator is a 550 kHz step-down switching voltage regulator capable of driving up to a 3A load with excellent line and load regulation. More...


Applications

•Low voltage point of load regulation
•Local solution for FPGA/DSP/ASIC core power
•Broadband networking and communications infrastructure
  Typical Application
click for larger image


ParametersValues
Output Current 3000 mA
Input Min Voltage 3 Volt
Input Max Voltage 5.5 Volt
Output Min 1.8, 1, 2.5, 1.2, 0.8, 3.3, 3, 1.5 Volt
Output Max 1.8, 1, 2.5, 1.2, 0.8, 3.3, 3, 1.5 Volt
Frequency Min 550 kHz
Frequency Max 550 kHz
Efficiency (peak) 95 %
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
Adj Switch Frequency No
PWM Mode Voltage
Topology Synchronous Buck
Special Features Internal compensation, low standby current
Step-Down Yes
Multiple Output Capability No
Output Power Undefined Watt
Output Voltage 1.8, 1, 2.5, 1.2, 0.8, 3.3, 3, 1.5 Volt
Output Range 1.8, 1, 2.5, 1.2, 0.8, 3.3, 3, 1.5
Feedback Voltage Undefined Volt
Regulator Family SIMPLE SWITCHER
PowerWise Yes
Synchronous Rectification Yes


Typical Performance

*click for larger image


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LM2853
 
3.00 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 5.50
V out 0.80 <=  V <= 3.30
I out    A <= 3.00
Ambient Temperature  °C <= 100


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Also Recommended
LM20123▲Full-Featured 3A, 1.5 MHz Switching Frequency
LM2852▲2A Version, 500kHz Or 1.5MHz Switching Frequency
LM2854▲4A Version, 500kHz Or 1MHz Switching Frequency
Additional Resources
Design Tools

Application Notes


Block Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM2853 3A 550 kHz Synchronous SIMPLE SWITCHER® Buck Regulator 616
Kbytes		 25-Oct-06 Download
LM2853 3A 550 kHz Synchronous SIMPLE SWITCHER® Buck Regulator (Japanese)
 561 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM2853-1.2EVAL3A 550 kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$22.501-
8 weeksN/A
LM2853-1.8EVAL3A 550 kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$22.501-
8 weeksN/A
LM2853-3.3EVAL3A 550 kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$22.501-
8 weeksN/A
LM2853MH-0.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.00rail
of
94		NSUZXYTT
LM2853
-0.8
8 weeksN/A
LM2853MH-1.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.00rail
of
94		NSUZXYTT
LM2853
-1.0
6 weeks500
LM2853MH-1.2TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.00rail
of
94		NSUZXYTT
LM2853
-1.2
6 weeks500
LM2853MH-1.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.00rail
of
94		NSUZXYTT
LM2853
-1.5
6 weeks500
LM2853MH-1.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.00rail
of
94		NSUZXYTT
LM2853
-1.8
8 weeks500
LM2853MH-2.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.00rail
of
94		NSUZXYTT
LM2853
-2.5
6 weeks500
LM2853MH-3.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.00rail
of
94		NSUZXYTT
LM2853
-3.0
8 weeks10
LM2853MH-3.3TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.00rail
of
94		NSUZXYTT
LM2853
-3.3
6 weeks500
LM2853MHX-0.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.00reel
of
2500		NSUZXYTT
LM2853
-0.8
8 weeksN/A
LM2853MHX-1.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.00reel
of
2500		NSUZXYTT
LM2853
-1.0
8 weeksN/A
LM2853MHX-1.2TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.00reel
of
2500		NSUZXYTT
LM2853
-1.2
8 weeks3000
LM2853MHX-1.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.00reel
of
2500		NSUZXYTT
LM2853
-1.5
8 weeksN/A
LM2853MHX-1.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.00reel
of
2500		NSUZXYTT
LM2853
-1.8
8 weeksN/A
LM2853MHX-2.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.00reel
of
2500		NSUZXYTT
LM2853
-2.5
8 weeks3000
LM2853MHX-3.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.00reel
of
2500		NSUZXYTT
LM2853
-3.0
8 weeksN/A
LM2853MHX-3.3TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.00reel
of
2500		NSUZXYTT
LM2853
-3.3
8 weeks3000

General Description

The LM2853 synchronous SIMPLE SWITCHER® buck regulator is a 550 kHz step-down switching voltage regulator capable of driving up to a 3A load with excellent line and load regulation. The LM2853 accepts an input voltage between 3.0V and 5.5V and delivers a customizable output voltage that is factory programmable from 0.8V to 3.3V in 100mV increments. Internal type-three compensation enables a low component count solution and greatly simplifies external component selection. The exposed-pad TSSOP-14 package enhances the thermal performance of the LM2853.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2853MH-3.0CS065238968520440200011249079519
LM2853MH-3.3CS065238968520440200011249079519
LM2853MHX-3.0CS065238968520440200011249079519
LM2853MHX-3.3CS065238968520440200011249079519

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.


Design Tools

TitleSize in Kbytes Date Click link below to Download    
Article - Voltage Mode Compensation of Buck Regulators     View    

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Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1513: Application Note 1513 LM2853 Evaluation Board 530
Kbytes		 30-Oct-06 Download
AN-1973: Application Note 1973 Benefits and Challenges of High-Frequency Regulators 348
Kbytes		 25-Jun-09 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1397: Application Note 1397 LM2852X Demonstration Board 518
Kbytes		 21-Sep-05 Download
AN-1397 (Chinese): Application Note 1397 LM2852X Demonstration Board
 213 Kbytes  
AN-1343: Application Note 1343 LM2852 Evaluation Board (500kHz version) 818
Kbytes		 19-May-05 Download
AN-1880: Application Note 1880 LM2854 1MHz Buck Regulator Demo Board 692
Kbytes		 27-Aug-08 Download
AN-1786: Application Note 1786 LM2854 500 kHz Buck Regulator Evaluation Board 760
Kbytes		 2-Apr-08 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 7-Nov-2009]