LM2940C - 1A Low Dropout Regulator

Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
• Dropout voltage typically 0.5V @IO = 1A
• Output current in excess of 1A
• Output voltage trimmed before assembly
• Reverse battery protection
• Internal short circuit current limit
• Mirror image insertion protection
• P + Product Enhancement tested

General Description

The LM2940/LM2940C positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically 0.5V and a maximum of 1V over the entire temperature range. More...


  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
Output Current 1000 mA
Output Min 9, 12, 5, 15 Volt
Dropout Voltage 0.5 Volt
Adjustable Output No
Quiescent Current 10 mA
Output Current 1000 mA
Input Max Voltage 26 Volt
Output Min 9, 12, 5, 15 Volt
Dropout Voltage 0.5 Volt
Adjustable Output No
Quiescent Current 10 mA
On/Off Pin No
Error Flag No
RegType LDO
Temperature Min -55 deg C
Temperature Max 125 deg C
Output Max 9, 12, 5, 15 Volt
Output Voltage 9, 12, 5, 15 Volt
View Using Catalog


Typical Performance

click for larger image


  Also Recommended
LP38690Lower Quiescent Current, Stable With Ceramic Output Capacitors
LP38692Lower Quiescent Current, Stable With Ceramic Output Capacitors & Enable Pin

Connection Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM2940/LM2940C 1A Low Dropout Regulator 565 Kbytes 18-Mar-07 View Online
Download
LM2940/LM2940C 1A Low Dropout Regulator (Japanese)
 744 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
LM2940CT-12TO-2203STD
NOPB		1
1		NA
NA		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.69rail
of
45		NSUZXYTTE#
LM2940CT
-12 P+
8 weeks2000
LM2940CT-15TO-2203STD
NOPB		1
1		NA
NA		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.69rail
of
45		NSUZXYTTE#
LM2940CT
-15 P+
8 weeks1000
LM2940CT-5.0TO-2203STD
NOPB		1
1		NA
NA		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.69rail
of
45		NSUZXYTTE#
LM2940CT
-5.0 P+
8 weeks2000
LM2940CT-9.0TO-2203NOPB1NARoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.69rail
of
45		NSUZXYTTE#
LM2940CT
-9.0 P+
8 weeks2000
LM2940CS-12TO-2633STD
NOPB		3
3		235
245		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.80rail
of
45		NSUZXYTTE#
LM2940CS
-12 P+
8 weeks1000
LM2940CS-15TO-2633STD
NOPB		3
3		235
245		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.80rail
of
45		NSUZXYTTE#
LM2940CS
-15 P+
8 weeks1000
LM2940CS-5.0TO-2633STD
NOPB		3
3		235
245		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.80rail
of
45		NSUZXYTTE#
LM2940CS
-5.0 P+
8 weeks1000
LM2940CS-9.0TO-2633NOPB3245RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.80rail
of
45		NSUZXYTTE#
LM2940CS
-9.0 P+
8 weeks2500
LM2940CSX-12TO-2633NOPB3245RoHS Download Full productionN/A
 
Buy Now 		1K+$0.80reel
of
500		NSUZXYTTE#
LM2940CS
-12 P+
8 weeks5000
LM2940CSX-15TO-2633NOPB3245RoHS Download Full productionN/A
 
Buy Now 		1K+$0.80reel
of
500		NSUZXYTTE#
LM2940CS
-15 P+
8 weeks3000
LM2940CSX-5.0TO-2633STD
NOPB		3
3		235
245		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.80reel
of
500		NSUZXYTTE#
LM2940CS
-5.0 P+
8 weeks5000
LM2940CSX-9.0TO-2633NOPB3245RoHS Download Full productionN/A
 
Buy Now 		1K+$0.80reel
of
500		NSUZXYTTE#
LM2940CS
-9.0 P+
8 weeks3000
LM2940C-15 MDCUnpackaged DieFull productionN/A
  CALLtray
of
N/A		-
N/AN/A
LM2940C-5 MDCUnpackaged DieFull productionN/A
  CALLtray
of
N/A		-
N/AN/A
LM2940C-12 MWCWaferFull productionN/A
  CALLwafer jar
of
N/A		-
N/AN/A
LM2940C-15 MWCWaferFull productionN/A
  CALLwafer jar
of
N/A		-
N/AN/A
LM2940C-5 MWCWaferFull productionN/A
  CALLwafer jar
of
N/A		-
N/AN/A

General Description

The LM2940/LM2940C positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input-output differential of 5V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (VIN − VOUT ≤ 3V).

Designed also for vehicular applications, the LM2940/LM2940C and all regulated circuitry are protected from reverse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940/LM2940C cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM * LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2940C-12 MWCSLM0395460028575002810823427
LM2940C-15 MDCSLM0395460028575002810823427
LM2940C-15 MWCSLM0395460028575002810823427
LM2940CS-12SLM0395460028575002810823427
LM2940CS-15SLM0395460028575002810823427
LM2940CS-5.0SLM0395460028575002810823427
LM2940CS-9.0SLM0395460028575002810823427
LM2940CSX-12SLM0395460028575002810823427
LM2940CSX-15SLM0395460028575002810823427
LM2940CSX-5.0SLM0395460028575002810823427
LM2940CSX-9.0SLM0395460028575002810823427
LM2940CT-12SLM0395460028575002810823427
LM2940CT-15SLM0395460028575002810823427
LM2940CT-5.0SLM0395460028575002810823427
LM2940CT-9.0SLM0395460028575002810823427

Note: The Early Failure Rates were calculated as point estimates. 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 6-Oct-2008]