LP3906   
Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface from the PowerWise® Family		 Click link to Download

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

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.

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

Applications
•FPGA, DSP core power
•Applications processors
•Peripheral I/O power
Also Recommended
LM26480▲Adjustable Outputs Version


apps diagram
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                                              LP3906
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Also Recommended
LM26480▲Adjustable Outputs Version

Typical Application
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apps diagram

Connection Diagram
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Typical Performance
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Paramaters / ValuesLP3906 LM26480
Input Min Voltage2.7 Volt 2.8 Volt
Input Max Voltage5.5 Volt 5.5 Volt
Output RangeLDOs: 1.0 to 3.5V; Buck: 0.8 to 3.5V LDOs: 1.0 to 3.3V; Buck: 0.8 to 3.3V
Channels4 Channels
Dropout Voltage0.08 Volt
Feedback Tolerance3 %
PowerWise TechnologyDynamic Voltage Scaling
Output1 VoutMax2.0 Volt
Output1 IoutMax1500 mA
Output1 TopologyBuck
Output2 VoutMin1.0 Volt
Output2 VoutMax3.5 Volt
Output2 IoutMax1500 mA
Output2 TopologyBuck
Output3 VoutMin1.0
Output3 VoutMax3.5 Volt
Output3 IoutMax300 mA
Output3 TopologyLDO
Output4 VoutMin1.0 Volt
Output4 VoutMax3.5 Volt
Output4 IoutMax300 mA
Output4 TopologyLDO
Special Features2 LDO regulators, 2 buck regulators 2 Bucks, 2 LDOs, Resistor Network set voltages, Separate Enables
TopologyBuck, LDO Buck, LDO
Switching Frequency2000 kHz 2000 kHz
Adj Switch FrequencyYes Yes
Sync PinYes No
RegTypePower Management Unit Power Management Unit
Step-DownYes Yes
Step-UpNo
InvertingNo No
FlybackNo No
Efficiency (peak)95 % 95 %
Output Power1.43 Watt 1.43 Watt
Adjustable OutputYes Yes
Error FlagNo No
On/Off PinYes Yes
Multiple Output CapabilityYes Yes
Temperature Min-40 deg C -40 deg C
Temperature Max85 deg C 85 deg C
AutomotiveYes Yes
PowerWiseYes

Datasheet
TitleSizeDateOther
Language
LP3906 Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface4197
Kbytes		28-Aug-09 


Featured Application Notes
TitleSizeDateOther
Language
AN-1532: Application Note 1532 LP3906 Evaluation Kit5066
Kbytes		16-Mar-07 


More Application Notes
TitleSizeDateOther
Language
AN-1501: Application Note 1501 LP3905-30 Application Board Information189
Kbytes		7-Mar-07 中文
AN-1527: Application Note 1527 LP3905-A3 Application Board Information158
Kbytes		5-Nov-07 中文
AN-1619: Application Note 1619 Evaluation Kit for LP3907 — Programmable Power Management Unit with 1 2 C Compatible Interface8282
Kbytes		4-Sep-07 中文

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3906SQ-DJXI/NOPB

RoHS

Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide2000
DIGIKEYWorldwide1168
FUTUREWorldwide405
$2.20 each at 1K+ pcsreel
of
1000
LP3906SQ-FXPI/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples

Contact your distributor
$2.20 each at 1K+ pcsreel
of
1000
LP3906SQ-JXXI/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide3116
FUTUREWorldwide1100
$2.20 each at 1K+ pcsreel
of
1000
LP3906SQ-PPXP/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide1581
$2.20 each at 1K+ pcsreel
of
1000
LP3906SQ-VPFP/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide1377
$2.20 each at 1K+ pcsreel
of
1000
LP3906SQX-DJXI/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$2.20 each at 1K+ pcsreel
of
4500
LP3906SQX-FXPI/NOPB

RoHS

Full production
Lead Time: 6 weeks

 

Contact your distributor
$2.20 each at 1K+ pcsreel
of
4500
LP3906SQX-JXXI/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$2.20 each at 1K+ pcsreel
of
4500
LP3906SQX-PPXP/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$2.20 each at 1K+ pcsreel
of
4500
LP3906SQX-VPFP/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$2.20 each at 1K+ pcsreel
of
4500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3906SQ-JXXIEV
Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible InterfaceFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide0
$104.00 each1

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 12C 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.

The LP3906 Evaluation kit is based on a modular system, where the actual evaluation board is connected to the PC via a USB?I2 C interface board. The kit supports complete functional evaluation of the LP3906 circuit.

Contents:

  • LP3906 evaluation board with USB interface
  • USB interface cable
  • CD including the following:
         --Evaluation software for PC
         --LP3906 datasheet
         --Evaluation Manual (Application Note)

Key Specifications:

Step-Down Dc/Dc Converter (Buck)

  • 1.5A output current
  • Programmable VOUT from:
         --Buck1: 0.8V-2.0V
         --Buck2: 1.0V-3.5V
  • Up to 96% efficiency
  • 2MHz PWM switching frequency
  • ±3% output voltage accuracy
  • Automatic soft start

Linear Regulators (LDO):

  • Programmable VOUT of 1.0V ? 3.5V
  • ±3% output voltage accuracy
  • 300mA output currents
  • 25mV (typ) Dropout

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 x 4 x 0.8 mm LLP Package
  • Software Programmable Regulators

Applications:

  • FPGA, DSP core power
  • Applications processors
  • Peripheral I/O Power

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LP3906SQ-DJXI/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-DJXI
LP3906SQ-FXPI/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-FXPI
LP3906SQ-JXXI/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-JXXI
LP3906SQ-PPXP/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-PPXP
LP3906SQ-VPFP/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-VPFP
LP3906SQX-DJXI/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-DJXI
LP3906SQX-FXPI/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-FXPI
LP3906SQX-JXXI/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-JXXI
LP3906SQX-PPXP/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-PPXP
LP3906SQX-VPFP/NOPB
LLP241260RoHSDownloadN/A
NS
UZXYTT
06-VPFP

[Information as of 21-Nov-2009]