LM2594HV   
SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator 		Click link to Download

Features
•3.3V, 5V, 12V, and adjustable output versions
•Adjustable version output voltage range, 1.2V to 37V (57V for the HV version)±4% max over line and load conditions
•Available in 8-pin surface mount and DIP-8 package
•Guaranteed 0.5A output current
•Input voltage range up to 60V
•Requires only 4 external components
•150 kHz fixed frequency internal oscillator
•TTL Shutdown capability
•Low power standby mode, IQ typically 85 µA
•High Efficiency
•Uses readily available standard inductors
•Thermal shutdown and current limit protection

Description

The LM2594/LM2594HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version, and are packaged in a 8-lead DIP and a 8-lead surface mount package.

Requiring a minimum number of external components, these regulators are simple to use and feature internal frequency compensation†, a fixed-frequency oscillator, and improved line and load regulation specifications.

The LM2594/LM2594HV series operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Because of its high efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed.

A standard series of inductors (both through hole and surface mount types) are available from several different manufacturers optimized for use with the LM2594/LM2594HV series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a guaranteed ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 85 µA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.

The LM2594HV is for applications requiring an input voltage up to 60V.

Applications
•Simple high-efficiency step-down (buck) regulator
•Efficient pre-regulator for linear regulators
•On-card switching regulators
•Positive to Negative convertor
WEBENCH Power Designer My Designs

LM2594HV
 
4.50 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 60.00
V out 1.23 <=  V <= 57.00
I out    A <= 0.50
Ambient Temperature  °C <= 100


What are WEBENCH® tools?

Also Recommended
LM2591HV▲1A 60V Switching Regulator
LM5007▲80V 0.5A Switching Regulator
LM5008▲100V 0.5A Switching Regulator



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                                              LM2594HV
Drag-Select for Table Reset Graph
Also Recommended
LM2591HV▲1A 60V Switching Regulator
LM5007▲80V 0.5A Switching Regulator
LM5008▲100V 0.5A Switching Regulator

Typical Application
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Block Diagram
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Typical Performance
*click for larger image


Paramaters / ValuesLM2594HV LM2591HV LM5007 LM5008
Output Current500 mA 1000 mA 500 mA 350 mA
Input Min Voltage4.5, 7, 4.75, 15 Volt 4.5 Volt 9 Volt 9.5 Volt
Input Max Voltage60 Volt 60 Volt 75 Volt 95 Volt
Output Min3.3, 1.23, 12, 5 Volt 3.3, 1.23, 5 Volt 2.5 Volt 2.5 Volt
Output Max57, 3.3, 12, 5 Volt 57, 3.3, 5 Volt 73 Volt 75 Volt
Frequency Min150 kHz 150 kHz 50 kHz 50 kHz
Frequency Max150 kHz 150 kHz 800 kHz 600 kHz
Efficiency (peak)88, 80, 82 % 77, 76, 82 % 93 % 92 %
On/Off PinYes Yes Yes Yes
Error FlagYes No No No
SoftStartNo No No No
Sync PinNo No No No
FlybackNo No No No
RegTypeSwitching Regulator Switching Regulator Switching Regulator Switching Regulator
Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C
Temperature Max125 deg C 125 deg C 125 deg C 125 deg C
Adjustable OutputYes, No Yes, No Yes Yes
Adj Switch FrequencyNo No Yes Yes
PWM ModeVoltage Voltage Constant on-time Constant on-time
TopologyBuck Buck Buck Buck
Special FeaturesSIMPLE SWITCHER regulator SIMPLE SWITCHER regulator Internal startup regulator for Vin>9V, internal 80V/0.7A N-FET, Pull Ron pin to ground for shutdown Internal startup regulator for Vin>9V, internal 100V/0.5A N-FET, Pull Ron pin to ground for shutdown
Step-DownYes Yes Yes Yes
Multiple Output CapabilityNo No No No
Output PowerUndefined Watt Undefined Watt Undefined Watt Undefined Watt
Output Voltage3.3, Undefined, 12, 5 Volt 3.3, Undefined, 5 Volt Undefined Volt Undefined Volt
Output Range5V, 12V, 3.3V, 1.23V to 57V 5V, 3.3V, 1.23V to 57V 2.5V to 73V 2.5V to 75V
Switching Frequency150 kHz 150 kHz 800 kHz 600 kHz
Regulator FamilySIMPLE SWITCHER SIMPLE SWITCHER Undefined Undefined
Synchronous RectificationNo No No No
Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2594HVM-12/NOPB
LM2594HVM-12

RoHS



SOIC NARROW		Full production
Lead Time: 16 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide203
FUTUREWorldwide1100
NEWARKAmericas101
$1.95 each at 1K+ pcsrail
of
95
LM2594HVM-3.3/NOPB
LM2594HVM-3.3

RoHS



SOIC NARROW		Full production
Lead Time: 16 weeks

Samples
DistributorRegionQty
ARROWWorldwide49
AVNET-EMWorldwide25
DIGIKEYWorldwide2124
FUTUREWorldwide1100
NEWARKAmericas1186
$1.95 each at 1K+ pcsrail
of
95
LM2594HVM-5.0/NOPB
LM2594HVM-5.0

RoHS



SOIC NARROW		Full production
Lead Time: 16 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide0
TAYLORAmericas140
$1.95 each at 1K+ pcsrail
of
95
LM2594HVM-ADJ/NOPB
LM2594HVM-ADJ

RoHS



SOIC NARROW		Full production
Lead Time: 16 weeks

Samples
DistributorRegionQty
ARROWWorldwide55
DIGIKEYWorldwide110
FUTUREWorldwide714
NEWARKAmericas77
TAYLORAmericas190
$1.95 each at 1K+ pcsrail
of
95
LM2594HVMX-12/NOPB
LM2594HVMX-12

RoHS



SOIC NARROW		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FUTUREWorldwide1100
$1.95 each at 1K+ pcsreel
of
2500
LM2594HVMX-3.3/NOPB

RoHS



SOIC NARROW		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.95 each at 1K+ pcsreel
of
2500
LM2594HVMX-5.0/NOPB
LM2594HVMX-5.0

RoHS



SOIC NARROW		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
ARROWWorldwide2500
DIGIKEYWorldwide0
FUTUREWorldwide1100
KEIKONGAsia Pacific2500
$1.95 each at 1K+ pcsreel
of
2500
LM2594HVMX-ADJ/NOPB
LM2594HVMX-ADJ

RoHS



SOIC NARROW		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FUTUREWorldwide1100
$1.95 each at 1K+ pcsreel
of
2500
LM2594HVN-12/NOPB
LM2594HVN-12

RoHS



MDIP		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide200
AVNET-EMWorldwide5
DIGIKEYWorldwide2073
$1.95 each at 1K+ pcsrail
of
40
LM2594HVN-3.3/NOPB

RoHS



MDIP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide146
$1.95 each at 1K+ pcsrail
of
40
LM2594HVN-5.0/NOPB
LM2594HVN-5.0

RoHS



MDIP		Full production
Lead Time: 14 weeks

Samples
DistributorRegionQty
ARROWWorldwide120
AVNET-EMWorldwide17
DIGIKEYWorldwide87
FUTUREWorldwide574
NEWARKAmericas218
RS COMPONENTSWorldwide345
$1.95 each at 1K+ pcsrail
of
40
LM2594HVN-ADJ/NOPB

RoHS



MDIP		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide13
DIGIKEYWorldwide789
FARNELLEurope and Asia1481
FUTUREWorldwide100
NEWARKAmericas48
RS COMPONENTSWorldwide150
$1.95 each at 1K+ pcsrail
of
40

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM2594HVADJ MDC
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM2594HVM-12/NOPB
LM2594HVM-12
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2594H
M-12
LM2594HVM-3.3/NOPB
LM2594HVM-3.3
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2594H
M-3.3
LM2594HVM-5.0/NOPB
LM2594HVM-5.0
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2594H
M-5.0
LM2594HVM-ADJ/NOPB
LM2594HVM-ADJ
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2594H
M-ADJ
LM2594HVMX-12/NOPB
LM2594HVMX-12
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2594H
M-12
LM2594HVMX-3.3/NOPB
SOIC NARROW81260RoHSDownloadN/A
NSZXTT
2594H
M-3.3
LM2594HVMX-5.0/NOPB
LM2594HVMX-5.0
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2594H
M-5.0
LM2594HVMX-ADJ/NOPB
LM2594HVMX-ADJ
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2594H
M-ADJ
LM2594HVN-12/NOPB
LM2594HVN-12
MDIP81
1		NA
NA		RoHSDownloadN/A
NSUZXYTTE#
LM2594HV
N-12 P+
LM2594HVN-3.3/NOPB
MDIP81NARoHSDownloadN/A
NSUZXYTTE#
LM2594HV
N-3.3 P+
LM2594HVN-5.0/NOPB
LM2594HVN-5.0
MDIP81
1		NA
NA		RoHSDownloadN/A
NSUZXYTTE#
LM2594HV
N-5.0 P+
LM2594HVN-ADJ/NOPB
MDIP81NARoHSDownloadN/A
NSUZXYTTE#
LM2594HV
N-ADJ P+

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2594HVM-12LB30003366400383050011086914834
LM2594HVM-3.3LB30003366400383050011086914834
LM2594HVM-5.0LB30003366400383050011086914834
LM2594HVM-ADJLB30003366400383050011086914834
LM2594HVMX-12LB30003366400383050011086914834
LM2594HVMX-3.3LB30003366400383050011086914834
LM2594HVMX-5.0LB30003366400383050011086914834
LM2594HVMX-ADJLB30003366400383050011086914834
LM2594HVN-12LB30003366400383050011086914834
LM2594HVN-3.3LB30003366400383050011086914834
LM2594HVN-5.0LB30003366400383050011086914834
LM2594HVN-ADJLB30003366400383050011086914834

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.


Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM2594HVADJ MDC
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

[Information as of 22-Nov-2009]