LP3971 - Power Management Unit for Advanced Application Processors from the PowerWise® Family
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Design Tools Reference Designs Application Notes Knowledge Base

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

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

General 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. More...


Applications

•PDA phones
•Smart phones
•Personal Media Players
•Digital cameras
•Application processors
•Marvell PXA
•Freescale
•Samsung
  Typical Application
*click for larger image


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


Typical Performance

*click for larger image


  Additional Resources
Design Tools

Application Notes


Block Diagram

*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP3971 Power Management Unit for Advanced Application Processors 1166
Kbytes		 22-Oct-08 Download
LP3971 Power Management Unit for Advanced Application Processors (Japanese)
 1133 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
LP3971SQ-B410EVPower Management Unit for Advanced Application ProcessorsFull productionN/A
 
Buy Now 		1+$150.001-
N/AN/A
LP3971SQE-7848LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
250		NS
UZXYTT
71-7848
6 weeksN/A
LP3971SQ-2G16LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-2G16
6 weeksN/A
LP3971SQ-7848LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-7848
6 weeksN/A
LP3971SQ-8858LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-8858
6 weeksN/A
LP3971SQ-B510LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-B510
12 weeksN/A
LP3971SQ-G824LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-G824
12 weeksN/A
LP3971SQ-N510LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-N510
12 weeksN/A
LP3971SQ-O509LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-O509
6 weeksN/A
LP3971SQ-P55ALLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-P55A
12 weeksN/A
LP3971SQ-Q418LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-Q418
6 weeksN/A
LP3971SQ-U511LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-U511
6 weeksN/A
LP3971SQ-W416LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71W416
12 weeksN/A
LP3971SQ-B410LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-B410
12 weeks5000
LP3971SQ-D510LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-D510
12 weeks5000
LP3971SQ-F211LLP40NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$3.25reel
of
1000		NS
UZXYTT
71-F211
12 weeks2000
LP3971SQX-2G16LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-2G16
6 weeksN/A
LP3971SQX-7848LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-7848
6 weeksN/A
LP3971SQX-8858LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-8858
6 weeksN/A
LP3971SQX-B510LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-B510
12 weeksN/A
LP3971SQX-G824LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-G824
12 weeksN/A
LP3971SQX-N510LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-N510
12 weeksN/A
LP3971SQX-O509LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-O509
6 weeksN/A
LP3971SQX-P55ALLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-P55A
12 weeksN/A
LP3971SQX-Q418LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-Q418
6 weeksN/A
LP3971SQX-U511LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-U511
6 weeksN/A
LP3971SQX-W416LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71W416
12 weeksN/A
LP3971SQX-B410LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-B410
6 weeksN/A
LP3971SQX-D510LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-D510
12 weeksN/A
LP3971SQX-F211LLP40NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$3.25reel
of
4500		NS
UZXYTT
71-F211
12 weeksN/A

General 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.

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.


Design Tools

TitleSize in Kbytes Date Click link below to Download    
Article - Managing Power Consumption on Your Portable Applications Processor Design     View    

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


Reference Designs
•RD-139 - LP3971 Smart Power Reference Design - 8 outputs

Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1620: Application Note 1620 LP3971 USB Evaluation Board 1648
Kbytes		 4-May-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-1621: Application Note 1621 LP3972 USB Evaluation Board REV B/5x5 2422
Kbytes		 4-May-07 Download

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

[Information as of 8-Nov-2009]