LP3971   
Power Management Unit for Advanced Application Processors from the PowerWise® Family		 Click link to Download

Features
•Compatible with advanced applications processors requiring DVM (Dynamic Voltage Management)
•Three buck regulators for powering high current processor functions or I/O's
•6 LDO's for powering RTC, peripherals, and I/O's
•Backup battery charger with automatic switch for lithium-manganese coin cell batteries and Super capacitors
•I 2C compatible high speed serial interface
•Software control of regulator functions and settings
•Precision internal reference
•Thermal overload protection
•Current overload protection
•Tiny 40-pin 5x5 mm LLP package

Description

The LP3971 is a multi-function, programmable Power Management Unit, designed especially for advanced application processors. The LP3971 is optimized for low power handheld applications and provides 6 low dropout, low noise linear regulators, three DC/DC magnetic buck regulators, a back-up battery charger and two GPIO’s. A high speed serial interface is included to program individual regulator output voltages as well as on/off control.

Key Specification Buck RegulatorsLDO’s
•Programmable VOUT from 0.725 to 3.3V
•Up to 95% efficiency
•Up to 1.6A output current
•±3% output voltage accuracy
•Programmable VOUT of 1.0V–3.3V
•±3% output voltage accuracy
•150/300/370 mA output currents
•LDO RTC 30 mA
•LDO 1 300 mA
•LDO 2 150 mA
•LDO 3 150 mA
•LDO 4 150 mA
•LDO 5 370 mA
•100 mV (typ) dropout

Applications
•PDA phones
•Smart phones
•Personal Media Players
•Digital cameras
•Application processors
•Marvell PXA
•Freescale
•Samsung



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                                              LP3971
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Typical Application
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Block Diagram
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Typical Performance
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ParametersValues
Input Min Voltage 2.7 Volt
Input Max Voltage 5.5 Volt
Output Range LDOs: 1.0 to 3.3V; Bucks: 0.8 to 3.3V
Channels 9 Channels
Dropout Voltage 0.25 Volt
PowerWise Technology Dynamic Voltage Scaling
Feedback Tolerance 3 %
Output1 VoutMin 0.8 Volt
Output1 VoutMax 3.3 Volt
Output1 IoutMax 1600 mA
Output1 Topology Buck
Output2 VoutMin 1 Volt
Output2 VoutMax 3.3 Volt
Output2 IoutMax 370 mA
Output2 Topology LDO
Output3 VoutMin 1.8
Output3 VoutMax 3.3 Volt
Output3 IoutMax 300 mA
Output3 Topology LDO
Output4 VoutMin 1 Volt
Output4 VoutMax 3.3 Volt
Output4 IoutMax 150 mA
Output4 Topology LDO
Special Features 3 buck regulators, 6 LDOs. See datasheet for specific output voltages, currents.
Topology Buck, LDO
Switching Frequency 2000 kHz
Adj Switch Frequency No
Sync Pin Yes
RegType Power Management Unit
Step-Down Yes
Step-Up No
Inverting No
Flyback No
Adjustable Output Yes
Error Flag Yes
On/Off Pin Yes
Temperature Min -40 deg C
Temperature Max 125 deg C
PowerWise Yes

Datasheet
TitleSizeDateOther
Language
LP3971 Power Management Unit for Advanced Application Processors1166
Kbytes		22-Oct-08日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1620: Application Note 1620 LP3971 USB Evaluation Board1648
Kbytes		4-May-07 


More Application Notes
TitleSizeDateOther
Language
AN-1621: Application Note 1621 LP3972 USB Evaluation Board REV B/5x52422
Kbytes		4-May-07 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3971SQE-7848/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide470
$3.25 each at 1K+ pcsreel
of
250
LP3971SQ-2G16/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide2000
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-7848/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-8858/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1992
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-B510/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide2350
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-G824/NOPB

RoHS

Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1799
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-N510/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
AECO TECHAsia Pacific1000
DIGIKEYWorldwide1504
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-O509/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide2000
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-P55A/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide2000
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-Q418/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide2000
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-U511/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-W416/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FARNELLEurope and Asia1000
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-B410/NOPB

RoHS

Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
ARROWWorldwide1000
DIGIKEYWorldwide2602
FARNELLEurope and Asia50
FUTUREWorldwide1100
KEIKONGAsia Pacific2750
RS COMPONENTSWorldwide20
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-D510/NOPB

RoHS

Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1812
FARNELLEurope and Asia1050
RS COMPONENTSWorldwide15
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQ-F211/NOPB

RoHS

Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1819
FARNELLEurope and Asia1050
KEIKONGAsia Pacific3000
RS COMPONENTSWorldwide75
$3.25 each at 1K+ pcsreel
of
1000
LP3971SQX-2G16/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-7848/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-8858/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-B510/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-G824/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-N510/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-O509/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-P55A/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-Q418/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-U511/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-W416/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-B410/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-D510/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3971SQX-F211/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3971SQ-B410EV
Power Management Unit for Advanced Application ProcessorsFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide12
$150.00 each1

The LP3971 is a multi-function, programmable Power Management Unit, designed especially for advanced application processors. The LP3971 is optimized for low power handheld applications and provides 6 low dropout, low noise linear regulators, three DC/DC magnetic buck regulators, a back-up battery charger and two GPIO's. A high speed serial interface is included to program individual regulator output voltages as well as on/off control.

Key Specifications:

  • Buck Regulators
  • Programmable V QUT from 0.725 to 3.3V
  • Up to 95% efficiency
  • Up to 1.6A output current
  • ± 3% output voltage accuracy

LDOs

  • Programmable V QUT of 1.0V-3.3V
  • ±3% output voltage accuracy
  • 150/300/370mA output currents
         __LDO RTC 30mA
         __LDO 1 300 mA
         __LDO 2 150mA
         __LDO3 150mA
         __LDO 4 150mA
         __LDO5 370mA
         100mV (typ) dropout

Features:

  • Compatible with advanced applications processors requiring DVM (Dynamic Voltage Management)
  • Three buck regulators for powering high current processor functions or I/O's
  • 6 LDO's for powering RTC, peripherals, and I/O's
  • Backup battery charger with automatic switch for lithium-manganese coin cell batteries and Super capacitors
  • I 2C compatible high speed serial interface
  • Software control of regulator functions and settings
  • Precision internal reference
  • Thermal overload protection
  • Current overload protection
  • Tiny 40-pin 5 x 5 mm LLP package

Applications:

  • PDA phones
  • Smart phones
  • Personal Media Players
  • Digital cameras
  • Application processors
         __Intel Xscale
         __Freescale
         __Samsung

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LP3971SQE-7848/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-7848
LP3971SQ-2G16/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-2G16
LP3971SQ-7848/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-7848
LP3971SQ-8858/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-8858
LP3971SQ-B510/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-B510
LP3971SQ-G824/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-G824
LP3971SQ-N510/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-N510
LP3971SQ-O509/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-O509
LP3971SQ-P55A/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-P55A
LP3971SQ-Q418/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-Q418
LP3971SQ-U511/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-U511
LP3971SQ-W416/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71W416
LP3971SQ-B410/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-B410
LP3971SQ-D510/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-D510
LP3971SQ-F211/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-F211
LP3971SQX-2G16/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-2G16
LP3971SQX-7848/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-7848
LP3971SQX-8858/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-8858
LP3971SQX-B510/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-B510
LP3971SQX-G824/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-G824
LP3971SQX-N510/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-N510
LP3971SQX-O509/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-O509
LP3971SQX-P55A/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-P55A
LP3971SQX-Q418/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-Q418
LP3971SQX-U511/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-U511
LP3971SQX-W416/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71W416
LP3971SQX-B410/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-B410
LP3971SQX-D510/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-D510
LP3971SQX-F211/NOPB
LLP401260RoHSDownloadN/A
NS
UZXYTT
71-F211

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3971SQ-2G16CMOS70184060010890004309006723
LP3971SQ-7848CMOS70184060010890004309006723
LP3971SQ-8858CMOS70184060010890004309006723
LP3971SQ-B410CMOS70184060010890004309006723
LP3971SQ-B510CMOS70184060010890004309006723
LP3971SQ-D510CMOS70184060010890004309006723
LP3971SQ-F211CMOS70184060010890004309006723
LP3971SQ-G824CMOS70184060010890004309006723
LP3971SQ-N510CMOS70184060010890004309006723
LP3971SQ-O509CMOS70184060010890004309006723
LP3971SQ-P55ACMOS70184060010890004309006723
LP3971SQ-Q418CMOS70184060010890004309006723
LP3971SQ-U511CMOS70184060010890004309006723
LP3971SQ-W416CMOS70184060010890004309006723
LP3971SQE-7848CMOS70184060010890004309006723
LP3971SQX-2G16CMOS70184060010890004309006723
LP3971SQX-7848CMOS70184060010890004309006723
LP3971SQX-8858CMOS70184060010890004309006723
LP3971SQX-B410CMOS70184060010890004309006723
LP3971SQX-B510CMOS70184060010890004309006723
LP3971SQX-D510CMOS70184060010890004309006723
LP3971SQX-F211CMOS70184060010890004309006723
LP3971SQX-G824CMOS70184060010890004309006723
LP3971SQX-N510CMOS70184060010890004309006723
LP3971SQX-O509CMOS70184060010890004309006723
LP3971SQX-P55ACMOS70184060010890004309006723
LP3971SQX-Q418CMOS70184060010890004309006723
LP3971SQX-U511CMOS70184060010890004309006723
LP3971SQX-W416CMOS70184060010890004309006723

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]