LP3906 - Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface from the PowerWise® Family
Datasheet Packaging Samples & Pricing Eval. Boards Design Tools Reference Designs Application Notes Knowledge Base

Features
•Compatible with advanced applications processors and FPGAs
•2 LDOs for powering Internal processor functions and I/Os
•High speed serial interface for independent control of device functions and settings
•Precision internal reference
•Thermal overload protection
•Current overload protection
•24-lead 5 × 4 × 0.8 mm LLP package
•Software Programmable Regulators

Key Specification

Step-Down DC/DC Converter (Buck) Linear Regulators (LDO)
•1.5A output current
• Programmable Vout from:
•Buck1 : 0.8V–2.0V
•Buck2 : 1.0V–3.5V
•Up to 96% efficiency
•2 MHz PWM switching frequency
•±3% output voltage accuracy
•Automatic soft start
•Programmable VOUT of 1.0V–3.5V
•±3% output voltage accuracy
•300 mA output currents
•25 mV (typ) Dropout

General Description

The LP3906 is a multi-function, programmable Power Management Unit, optimized for low power FPGAs, Microprocessors and DSPs. This device integrates two highly efficient 1.5A Step-Down DC/DC converters with dynamic voltage management (DVM), two 300mA Linear Regulators and a 400kHz I 2C compatible interface to allow a host controller access to the internal control registers of the LP3906. More...


Applications

•FPGA, DSP core power
•Applications processors
•Peripheral I/O power
  Typical Application
*click for larger image

apps diagram

ParametersValues
Input Min Voltage 2.7 Volt
Input Max Voltage 5.5 Volt
Output Range LDOs: 1.0 to 3.5V; Buck: 0.8 to 3.5V
Channels 4 Channels
Dropout Voltage 0.08 Volt
Feedback Tolerance 3 %
PowerWise Technology Dynamic Voltage Scaling
Output1 VoutMax 2.0 Volt
Output1 IoutMax 1500 mA
Output1 Topology Buck
Output2 VoutMin 1.0 Volt
Output2 VoutMax 3.5 Volt
Output2 IoutMax 1500 mA
Output2 Topology Buck
Output3 VoutMin 1.0
Output3 VoutMax 3.5 Volt
Output3 IoutMax 300 mA
Output3 Topology LDO
Output4 VoutMin 1.0 Volt
Output4 VoutMax 3.5 Volt
Output4 IoutMax 300 mA
Output4 Topology LDO
Special Features 2 LDO regulators, 2 buck regulators
Topology Buck, LDO
Switching Frequency 2000 kHz
Adj Switch Frequency Yes
Sync Pin Yes
RegType Power Management Unit
Step-Down Yes
Step-Up No
Inverting No
Flyback No
Efficiency (peak) 95 %
Output Power 1.43 Watt
Adjustable Output Yes
Error Flag No
On/Off Pin Yes
Multiple Output Capability Yes
Temperature Min -40 deg C
Temperature Max 85 deg C
Automotive Yes
PowerWise Yes


Typical Performance

click for larger image


  Also Recommended
LM26480▲Adjustable Outputs Version
Additional Resources
Design Tools

Application Notes


Connection Diagram

*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP3906 Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface 4197
Kbytes		 28-Aug-09 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
LP3906SQ-JXXIEVDual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible InterfaceFull productionN/A
 
Buy Now 		1+$104.001-
6 weeksN/A
LP3906SQ-DJXILLP24NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.20reel
of
1000		NS
UZXYTT
06-DJXI
12 weeksN/A
LP3906SQ-FXPILLP24NOPB1260RoHS Download Full productionN/A
Samples1K+$2.20reel
of
1000		NS
UZXYTT
06-FXPI
6 weeksN/A
LP3906SQ-JXXILLP24NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.20reel
of
1000		NS
UZXYTT
06-JXXI
6 weeksN/A
LP3906SQ-PPXPLLP24NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.20reel
of
1000		NS
UZXYTT
06-PPXP
12 weeksN/A
LP3906SQ-VPFPLLP24NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.20reel
of
1000		NS
UZXYTT
06-VPFP
12 weeksN/A
LP3906SQX-DJXILLP24NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.20reel
of
4500		NS
UZXYTT
06-DJXI
12 weeksN/A
LP3906SQX-FXPILLP24NOPB1260RoHS Download Full productionN/A
 1K+$2.20reel
of
4500		NS
UZXYTT
06-FXPI
6 weeksN/A
LP3906SQX-JXXILLP24NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.20reel
of
4500		NS
UZXYTT
06-JXXI
12 weeksN/A
LP3906SQX-PPXPLLP24NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.20reel
of
4500		NS
UZXYTT
06-PPXP
12 weeksN/A
LP3906SQX-VPFPLLP24NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.20reel
of
4500		NS
UZXYTT
06-VPFP
12 weeksN/A

General Description

The LP3906 is a multi-function, programmable Power Management Unit, optimized for low power FPGAs, Microprocessors and DSPs. This device integrates two highly efficient 1.5A Step-Down DC/DC converters with dynamic voltage management (DVM), two 300mA Linear Regulators and a 400kHz I 2C compatible interface to allow a host controller access to the internal control registers of the LP3906. The LP3906 additionally features programmable power-on sequencing and is offered in a tiny 5 x 4 x 0.8mm LLP-24 pin package.

Design Tools

TitleSize in Kbytes Date Click link below to Download    
LP3906 Evaluation Board software 103 Kbytes 30-May-2007 View Download  
Flexible Power Management Solution for Low-Power Xilinx FPGAs Using the LP3906 615 Kbytes 23-Apr-2007 View Online Download  

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


Reference Designs
•RD-161 - LP3906 Smart Power Reference Design - 4 outputs

Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1532: Application Note 1532 LP3906 Evaluation Kit 5066
Kbytes		 16-Mar-07 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-1501: Application Note 1501 LP3905-30 Application Board Information 189
Kbytes		 7-Mar-07 Download
AN-1501 (Chinese): Application Note 1501 LP3905-30 Application Board Information
 180 Kbytes  
AN-1527: Application Note 1527 LP3905-A3 Application Board Information 158
Kbytes		 5-Nov-07 Download
AN-1527 (Chinese): Application Note 1527 LP3905-A3 Application Board Information
 212 Kbytes  
AN-1619: Application Note 1619 Evaluation Kit for LP3907 — Programmable Power Management Unit with 1 2 C Compatible Interface 8282
Kbytes		 4-Sep-07 Download
AN-1619 (Chinese): Application Note 1619 Evaluation Kit for LP3907 — Programmable Power Management Unit with 1 2 C Compatible Interface
 1278 Kbytes  

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

[Information as of 7-Nov-2009]