LM26003   
3A Switching Regulator with High Efficiency Sleep Mode from the PowerWise® Family		 Click link to Download

Features
•LM26003Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (-40°C to +125°C operating junction temperature)
•High efficiency sleep mode
•40 µA typical Iq in sleep mode
•10.8 µA typical Iq in shutdown mode
•3.0V minimum input voltage
•4.0V to 38V continuous input range
•1.5% reference accuracy
•Cycle-by-cycle current limit
•Adjustable Frequency (150 kHz to 500 kHz)
•Synchronizable to an external clock
•Power Good Flag
•Forced PWM function
•Adjustable Soft-start
•TSSOP-20 exposed pad package
•Thermal Shut Down

Description

The LM26003 is a switching regulator designed for the high efficiency requirements of applications with stand-by modes. The device features a low-current sleep mode to maintain efficiency under light-load conditions and current-mode control for accurate regulation over a wide input voltage range. Quiescent current is reduced to 10.8 µA typically in shutdown mode and less than 40 µA in sleep mode. Forced PWM mode is also available to disable sleep mode.

The LM26003 can deliver up to 3A of continuous load current with a fixed current limit, through the internal N-channel switch. The part has a wide input voltage range of 4.0V to 38V and can operate with input voltages as low as 3V during line transients.

Operating frequency is adjustable from 150 kHz to 500 kHz with a single resistor and can be synchronized to an external clock.

Other features include Power good, adjustable soft-start, enable pin, input under-voltage protection, and an internal bootstrap diode for reduced component count.

Applications
•Automotive Telematics
•Navigation systems
•In-Dash Instrumentation
•Battery Powered Applications
•Stand-by power for home gateways/set-top boxes



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                                              LM26003
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Typical Application
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Block Diagram
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Typical Performance
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ParametersValues
Output Current 3000 mA
Input Min Voltage 3 Volt
Input Max Voltage 38 Volt
Output Min 1.25 Volt
Output Max 35 Volt
Frequency Min 150 kHz
Frequency Max 500 kHz
Efficiency (peak) 92 %
On/Off Pin Yes
Error Flag Yes
SoftStart Yes
Sync Pin Yes
Inverting No
Flyback No
RegType Switching Regulator
Temperature Min -40 deg C
Temperature Max 125 deg C
Adjustable Output Yes
Adj Switch Frequency Yes
PWM Mode Current
Topology Buck
Special Features High efficiency sleep mode, 1.5% output voltage accuracy, Quiescent current 50uA
Step-Down Yes
Multiple Output Capability No
Output Power Undefined Watt
Output Voltage Undefined Volt
Output Range 1.25V to 35V
Switching Frequency Undefined kHz
Feedback Voltage 1.2 Volt
Regulator Family Undefined
AEC Q-100 Automotive Grade 1
Automotive Yes
PowerWise Yes
Synchronous Rectification No

Datasheet
TitleSizeDateOther
Language
LM26003/LM26003Q 3A Switching Regulator with High Efficiency Sleep Mode462
Kbytes		2-Mar-09 


Featured Application Notes
TitleSizeDateOther
Language
AN-1884: Application Note 1884 LM26003 Evaluation Board507
Kbytes		28-Aug-08 


More Application Notes
TitleSizeDateOther
Language
AN-1454: Application Note 1454 LM26001 Evaluation Board794
Kbytes		1-Sep-06 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM26003MH/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 15 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide68
$3.52 each at 1K+ pcsrail
of
73
LM26003QMH/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide146
$3.69 each at 1K+ pcsrail
of
73
LM26003MHX/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.52 each at 1K+ pcsreel
of
2500
LM26003QMHX/NOPB

RoHS



TSSOP EXP PAD		Full production
Lead Time: 15 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$3.69 each at 1K+ pcsreel
of
2500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM26003EVAL
LM26003 - 3A Switching Regulator with High Efficiency Sleep ModeFull production


 
DistributorRegionQty
NATIONALWorldwide23
$62.00 each1

Description:

The LM26003 evaluation board is designed to demonstrate the capabilities of the LM26003 switching regulator. The LM26003 eval board can be configured to provide an output of 3.3V at up to 3A from the input range of 4V to 38V. The nominal operating frequency is 300kHz and can be synchronized from +30% to -20% of nominal using the SYNC connection post. The evaluation board is designed to operate at ambient temperatures up to 75°C.

To aid in the design and evaluation of dc/dc buck converters based on the LM26003 regulator, the evaluation board can be re-configured for different output voltages and operating frequencies.

Contents:


Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM26003MH/NOPB
TSSOP EXP PAD201260RoHSN/AN/A
NSUZXYTT
LM26003
MH
LM26003QMH/NOPB
TSSOP EXP PAD201260RoHSN/AN/A
NSUZXYTT
LM26003
QMH
LM26003MHX/NOPB
TSSOP EXP PAD201260RoHSN/AN/A
NSUZXYTT
LM26003
MH
LM26003QMHX/NOPB
TSSOP EXP PAD201260RoHSN/AN/A
NSUZXYTT
LM26003
QMH

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM26003MHABCD15003417500423400011201409060
LM26003MHXABCD15003417500423400011201409060
LM26003QMHABCD15003417500423400011201409060
LM26003QMHXABCD15003417500423400011201409060

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]