LM2852 - 2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck Regulator from the PowerWise® Family

Datasheet Packaging Samples & Pricing Eval. Boards Reliability Application Notes Knowledge Base

Features
•Input voltage range of 2.85 to 5.5V
•Factory EEPROM set output voltages from 0.8V to 3.3V in 100mV increments
•Maximum load current of 2A
•Voltage Mode Control
•Internal type-three compensation
•Switching frequency of 500kHz or 1.5MHz
•Low standby current of 10µA
•Internal 60 m MOSFET switches
•Standard voltage options 0.8/1.0/1.2/1.5/1.8/2.5/3.3 volts

General Description

The LM2852 SIMPLE SWITCHER® synchronous buck regulator is a high frequency step-down switching voltage regulator capable of driving up to a 2A 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
•Portable computing
  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
Output Current 2000 mA
Input Min Voltage 2.85 Volt
Input Max Voltage 5.5 Volt
Output Min 1.8, 1, 2.5, 1.2, 0.8, 3.3, 1.5 Volt
Output Max 1.8, 1, 2.5, 1.2, 0.8, 3.3, 1.5 Volt
Frequency Min 500, 1500 kHz
Frequency Max 500, 1500 kHz
Efficiency (peak) 95 %
Output Current 2000 mA
Input Min Voltage 2.85 Volt
Input Max Voltage 5.5 Volt
Output Min 1.8, 1, 2.5, 1.2, 0.8, 3.3, 1.5 Volt
Output Max 1.8, 1, 2.5, 1.2, 0.8, 3.3, 1.5 Volt
Frequency Min 500, 1500 kHz
Frequency Max 500, 1500 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, 1.5 Volt
Output Range 0.8V to 3.3V
Switching Frequency 500 kHz
Feedback Voltage Undefined Volt
Regulator Family SIMPLE SWITCHER
PowerWise Yes
Synchronous Rectification Yes
View Using Catalog


Typical Performance

click for larger image


  WEBENCH Live Simulation!
LM2852Y WEBENCH® Designer

 
2.85 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 5.50
V out 0.80 <=  V <= 3.30
I out    A <= 2.00
Ambient Temperature  °C <= 100


What are WEBENCH® tools?


Also Recommended
LM20123Full-Featured 3A, 1.5 MHz Switching Frequency
LM28533A Version

Additional Resources

Online Seminars Application Notes (see below)


Block Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM2852 2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck Regulator 665 Kbytes 24-Oct-06 Download
LM2852 2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck Regulator (Japanese)
 640 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
LM2852X-1.2EVAL2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$67.101-
8 weeksN/A
LM2852X-1.8EVAL2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$67.101-
8 weeksN/A
LM2852X-2.5EVAL2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$67.101-
8 weeksN/A
LM2852X-3.3EVAL2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$67.101-
8 weeksN/A
LM2852Y-1.2EVAL2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$48.001-
8 weeksN/A
LM2852Y-1.8EVAL2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$48.001-
8 weeksN/A
LM2852Y-2.5EVAL2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$48.001-
8 weeksN/A
LM2852Y-3.3EVAL2A 500/1500kHz Synchronous SIMPLE SWITCHER® Buck RegulatorFull productionN/A
 
Buy Now 		1+$48.001-
8 weeksN/A
LM2852XMXA-0.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852X
0.8
12 weeks10
LM2852XMXA-1.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852X
1.0
12 weeks1000
LM2852XMXA-1.2TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852X
1.2
6 weeks500
LM2852XMXA-1.5TSSOP EXP PAD14STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852X
1.5
6 weeks500
LM2852XMXA-1.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852X
1.8
12 weeks500
LM2852XMXA-2.5TSSOP EXP PAD14STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852X
2.5
6 weeks500
LM2852XMXA-3.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852X
3.0
6 weeks500
LM2852XMXA-3.3TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852X
3.3
12 weeks500
LM2852YMXA-0.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
-0.8
6 weeks50
LM2852YMXA-1.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
-1.0
6 weeks500
LM2852YMXA-1.2TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
-1.2
6 weeks500
LM2852YMXA-1.3TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
1.3
6 weeks50
LM2852YMXA-1.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
-1.5
6 weeks500
LM2852YMXA-1.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
-1.8
6 weeks500
LM2852YMXA-2.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
-2.5
6 weeks500
LM2852YMXA-3.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
3.0
6 weeks10
LM2852YMXA-3.3TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.90rail
of
94		NSUZXYTT
2852Y
-3.3
6 weeks500
LM2852XMXAX-0.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852X
0.8
12 weeksN/A
LM2852XMXAX-1.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852X
1.0
12 weeksN/A
LM2852XMXAX-1.2TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852X
1.2
12 weeksN/A
LM2852XMXAX-1.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852X
1.5
12 weeks3000
LM2852XMXAX-1.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852X
1.8
12 weeksN/A
LM2852XMXAX-2.5TSSOP EXP PAD14STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852X
2.5
12 weeksN/A
LM2852XMXAX-3.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852X
3.0
12 weeksN/A
LM2852XMXAX-3.3TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852X
3.3
12 weeksN/A
LM2852YMXAX-0.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
-0.8
6 weeksN/A
LM2852YMXAX-1.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
-1.0
6 weeks3000
LM2852YMXAX-1.2TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
-1.2
6 weeks3000
LM2852YMXAX-1.3TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
1.3
6 weeksN/A
LM2852YMXAX-1.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
-1.5
6 weeksN/A
LM2852YMXAX-1.8TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
-1.8
6 weeksN/A
LM2852YMXAX-2.5TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
-2.5
6 weeksN/A
LM2852YMXAX-3.0TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
3.0
6 weeksN/A
LM2852YMXAX-3.3TSSOP EXP PAD14NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.90reel
of
2500		NSUZXYTT
2852Y
-3.3
6 weeks3000

General Description

The LM2852 SIMPLE SWITCHER® synchronous buck regulator is a high frequency step-down switching voltage regulator capable of driving up to a 2A load with excellent line and load regulation. The LM2852 can accept an input voltage between 2.85V and 5.5V and deliver an output voltage that is factory programmable from 0.8V to 3.3V in 100mV increments. The LM2852 is available with a choice of two switching frequencies - 500kHz (LM2852Y) or 1.5MHz (LM2852X). It also features internal, type-three compensation to deliver a low component count solution. The exposed-pad TSSOP-14 package enhances the thermal performance of the LM2852.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2852XMXA-0.8CS065234108590386200011095853045
LM2852XMXA-1.0CS065234108590386200011095853045
LM2852XMXA-1.2CS065234108590386200011095853045
LM2852XMXA-1.5CS065234108590386200011095853045
LM2852XMXA-1.8CS065234108590386200011095853045
LM2852XMXA-2.5CS065234108590386200011095853045
LM2852XMXA-3.0CS065234108590386200011095853045
LM2852XMXA-3.3CS065234108590386200011095853045
LM2852XMXAX-0.8CS065234108590386200011095853045
LM2852XMXAX-1.0CS065234108590386200011095853045
LM2852XMXAX-1.2CS065234108590386200011095853045
LM2852XMXAX-1.5CS065234108590386200011095853045
LM2852XMXAX-1.8CS065234108590386200011095853045
LM2852XMXAX-2.5CS065234108590386200011095853045
LM2852XMXAX-3.0CS065234108590386200011095853045
LM2852XMXAX-3.3CS065234108590386200011095853045
LM2852YMXA-0.8CS065234108590386200011095853045
LM2852YMXA-1.0CS065234108590386200011095853045
LM2852YMXA-1.2CS065234108590386200011095853045
LM2852YMXA-1.3CS065234108590386200011095853045
LM2852YMXA-1.5CS065234108590386200011095853045
LM2852YMXA-1.8CS065234108590386200011095853045
LM2852YMXA-2.5CS065234108590386200011095853045
LM2852YMXA-3.0CS065234108590386200011095853045
LM2852YMXA-3.3CS065234108590386200011095853045
LM2852YMXAX-0.8CS065234108590386200011095853045
LM2852YMXAX-1.0CS065234108590386200011095853045
LM2852YMXAX-1.2CS065234108590386200011095853045
LM2852YMXAX-1.3CS065234108590386200011095853045
LM2852YMXAX-1.5CS065234108590386200011095853045
LM2852YMXAX-1.8CS065234108590386200011095853045
LM2852YMXAX-2.5CS065234108590386200011095853045
LM2852YMXAX-3.0CS065234108590386200011095853045
LM2852YMXAX-3.3CS065234108590386200011095853045

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

TitleSize in Kbytes Date Click link below to Download
AN-1343: Application Note 1343 LM2852 Evaluation Board (500kHz version) 818 Kbytes 19-May-05 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  

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-1973: Application Note 1973 Benefits and Challenges of High-Frequency Regulators 348 Kbytes 25-Jun-09 Download
AN-1513: Application Note 1513 LM2853 Evaluation Board 530 Kbytes 30-Oct-06 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 3-Jul-2009]