LM26484   
Power Management Unit 		Click link to Download

Description

The LM26484 is a multi-function, configurable Power Management Unit. This device integrates two highly efficient 2.0A Step-Down DC/DC converters, one LDO Controller, a POR (Power On Reset) circuit, and thermal overload protection circuitry. All regulator output voltages are externally adjustable. The LDO controller is a low-voltage NMOS voltage regulator. The LM26484 is offered in a 5 x 4 x 0.8 mm LLP-24 pin package.

Key Specification STEP-DOWN DC/DC CONVERTER (BUCK) LINEAR REGULATOR (LDO) CONTROLLER
•3.0–5.5V Input Range
•Externally adjustable VOUT:
•Buck1 : 0.8V–3.5V @ 2A
•Buck2 : 0.8V–3.5V @ 2A
•180° Phase Shift between Bucks Clocks
•2 MHz PWM switching frequency
•±1% feedback voltage accuracy
•Automatic soft start
•Current overload protection
•PWM/PFM efficiency modes available
•3.0V–5.5V Input range
•Externally adjustable VOUT
•±1.5% feedback voltage accuracy
•Regulated to Low VIN - Low VOUT LI-LO (Low Input Low Output) NFET operation
•Input to the LI-LO configuration, can be post regulated when supply is regulated by Buck2
•Up to 1000 mA output current by selection of external FET

Applications
•Digital Cores and I/Os (FPGAs, ASICs, DSPs)
•Automotive infotainment
•Set-top-box
•Cordless phone base station
•Networking router
•Printers
Also Recommended
LM26420Dual 2A Buck With Power Good And Enable For Each Channel
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Connection Diagram
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Typical Performance
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ParametersValues
Input Min Voltage 3.0 Volt
Input Max Voltage 5.5 Volt
Output1 VoutMin 0.8 Volt
Output1 VoutMax 3.5 Volt
Output1 IoutMax 2000 mA
Output1 Topology Buck
Output2 VoutMin 0.8 Volt
Output2 VoutMax 3.5 Volt
Output2 IoutMax 2000 mA
Output2 Topology Buck
Output3 VoutMin 0.8
Output3 VoutMax 1.5 Volt
Output3 IoutMax 1000 mA
Output3 Topology LDO
Output4 Topology Buck
Switching Frequency 2000 kHz
RegType LDO
Efficiency (peak) 90 %
Adjustable Output Yes

Datasheet
TitleSizeDateOther
Language
LM26484 Power Management Unit1848
Kbytes		23-Sep-09 


Featured Application Notes
TitleSizeDateOther
Language
AN-1858: Application Note 1858 LM26484 Power Management Unit Evaluation Board Application Note582
Kbytes		4-Nov-09 


More Application Notes
TitleSizeDateOther
Language
AN-1800: Application Note 1800 Evaluation Kit for LM26480 - Dual DC/DC Buck Regulators with Dual Low-Noise Linear Regulators2805
Kbytes		3-Sep-08 中文

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM26484SQE/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide245
FUTUREWorldwide500
NEWARKAmericas150
$2.00 each at 1K+ pcsreel
of
250
LM26484SQ/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$2.00 each at 1K+ pcsreel
of
1000
LM26484SQX/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$2.00 each at 1K+ pcsreel
of
4500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM26484SQEV
evaluation boardFull production
Lead Free (RoHS)

 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide36
$129.00 each1

Description:

The LM26484 is a multi-function, configurable Power Management Unit. This device integrates two highly efficient 2.0A Step-Down DC/DC converters, one LDO Controller, a POR (Power on Reset) circuit, and thermal overload protection circuitry. All regulator output voltages are externally adjustable. The LDO controller is a low-voltage NMOS voltage regulator. The LM26484 is offered in a 5 x 4 x 0.8 mm LLP-24 pin package.

The LM26484 evaluation board is a working demonstration of the two step-down DC-DC converters and an LDO controller. The application note helps the user of the evaluation board make the best use of the LM26484 with their application.

Features:

STEP-DOWN DC/DC Converter (BUCK)

  • 3.0 - 5.5V Input Range
  • Externally adjustable VOUT
  • Buck1: 0.8V-3.5V @ 2A
  • Buck2: 0.8V-3.5V @ 2A
  • 180° Phase Shift between Bucks Clocks
  • 2 MHz PWM switching frequency
  • ± 1% feedback voltage accuracy
  • Automatic soft start
  • Current overload protection
  • PWM/PFM efficiency modes available

LINEAR REGULATOR (LDO) CONTROLLER

  • 3.0V-5.5V Input range
  • Externally adjustable VOUT
  • ± 1.5% feedback voltage accuracy
  • Regulated to Low VIN - Low VOUT LI-LO (Low Input Low Output) NFET Operation
  • Input to the LI-LO configuration, can be post regulated when supply is regulated by Buck2
  • Up to 1000 mA output current by selection of external FET

Applications:

  • Digital Cores and I/Os (FPGAs, ASICs, DSPs)
  • Automotive infotainment
  • Set-top-box
  • Cordless phone base station
  • Networking router
  • Printers

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM26484SQE/NOPB
LLP241260RoHSN/AN/A
NS
UZXYTT
26484SQ
LM26484SQ/NOPB
LLP241260RoHSN/AN/A
NS
UZXYTT
26484SQ
LM26484SQX/NOPB
LLP241260RoHSN/AN/A
NS
UZXYTT
26484SQ

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM26484SQCMOS70184060010890004309006723
LM26484SQECMOS70184060010890004309006723
LM26484SQXCMOS70184060010890004309006723

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]