LP3972   
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 LP3972 is a multi-function, programmable Power Management Unit, designed especially for advanced application processors. The LP3972 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
•150/300/400 mA output currents
•LDO_RTC 30 mA
•LDO1 300 mA
•LDO2 150 mA
•LDO3 150 mA
•LDO4 150 mA
•LDO5 400 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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                                              LP3972
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Connection 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 .25 Volt
PowerWise Technology Dynamic Voltage Scaling
Feedback Tolerance 3 %
Output1 VoutMin .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 300 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
Efficiency (peak) 95 %
Adjustable Output Yes
Error Flag Yes
On/Off Pin Yes
Multiple Output Capability Yes
Temperature Min -40 deg C
Temperature Max 125 deg C
PowerWise Yes

Datasheet
TitleSizeDateOther
Language
LP3972 Power Management Unit for Advanced Application Processors1161
Kbytes		8-Jun-09 


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


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

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3972SQ-0514/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide2000
$3.25 each at 1K+ pcsreel
of
1000
LP3972SQ-I414/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
AITGAsia Pacific1001
DIGIKEYWorldwide999
$3.25 each at 1K+ pcsreel
of
1000
LP3972SQ-A413/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1387
$3.25 each at 1K+ pcsreel
of
1000
LP3972SQ-A514/NOPB
LP3972SQ-A514

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide2281
$3.25 each at 1K+ pcsreel
of
1000
LP3972SQ-E514/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide1994
$3.25 each at 1K+ pcsreel
of
1000
LP3972SQ-I514/NOPB
LP3972SQ-I514

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide727
DIGIKEYWorldwide4000
$3.25 each at 1K+ pcsreel
of
1000
LP3972SQX-0514/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3972SQX-I414/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3972SQX-A413/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3972SQX-A514/NOPB

RoHS

Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3972SQX-E514/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.25 each at 1K+ pcsreel
of
4500
LP3972SQX-I514

RoHS

Full production
Lead Time: 6 weeks

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

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3972SQ-I514EV
Power Management Unit for Advanced Application ProcessorsFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide4
$150.00 each1

The LP3972 is a multi-function, programmable Power Management Unit, designed especially for advanced application processors. The LP3972 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

LDO's:

  • Programmable V QUT of 1.0V-3.3V
  • ±3% output voltage accuracy
  • 150/300/400mA output currents
         __LDO RTC 30mA
         __LDO 1 300 mA
         __LDO 2 150mA
         __LDO3 150mA
         __LDO 4 150mA
         __LDO5 400mA
         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
LP3972SQ-0514/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-0514
LP3972SQ-I414/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-I414
LP3972SQ-A413/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-A413
LP3972SQ-A514/NOPB
LP3972SQ-A514
LLP401
1		260
260		RoHSN/AN/A
NS
UZXYTT
72-A514
LP3972SQ-E514/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-E514
LP3972SQ-I514/NOPB
LP3972SQ-I514
LLP401
1		260
260		RoHSN/AN/A
NS
UZXYTT
72-I514
LP3972SQX-0514/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-0514
LP3972SQX-I414/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-I414
LP3972SQX-A413/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-A413
LP3972SQX-A514/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-A514
LP3972SQX-E514/NOPB
LLP401260RoHSN/AN/A
NS
UZXYTT
72-E514
LP3972SQX-I514
LLP40RoHSN/AN/A
NS
UZXYTT
72-I514

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3972SQ-0514CMOS70184060010890004309006723
LP3972SQ-A413CMOS70184060010890004309006723
LP3972SQ-A514CMOS70184060010890004309006723
LP3972SQ-E514CMOS70184060010890004309006723
LP3972SQ-I414CMOS70184060010890004309006723
LP3972SQ-I514CMOS70184060010890004309006723
LP3972SQX-0514CMOS70184060010890004309006723
LP3972SQX-A413CMOS70184060010890004309006723
LP3972SQX-A514CMOS70184060010890004309006723
LP3972SQX-E514CMOS70184060010890004309006723
LP3972SQX-I414CMOS70184060010890004309006723
LP3972SQX-I514CMOS70184060010890004309006723

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 22-Nov-2009]