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Power Circuits / Linear Regulator ICs / LM3940IS-3.3/NOPB
Datasheets
LM3940IS-3.3/NOPB by:

1-A, low-dropout voltage regulator for 5-V to 3.3-V conversion 3-DDPAK/TO-263 -40 to 125

Part Details for LM3940IS-3.3/NOPB by Texas Instruments

Results Overview of LM3940IS-3.3/NOPB by Texas Instruments

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Applications Industrial Automation Energy and Power Systems Renewable Energy

LM3940IS-3.3/NOPB Information

LM3940IS-3.3/NOPB by Texas Instruments is a Linear Regulator IC.
Linear Regulator ICs are under the broader part category of Power Circuits.

A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.

Price & Stock for LM3940IS-3.3/NOPB

Part # Distributor Description Stock Price Buy
DISTI # 33AH4197
Newark Ic, V Reg, Linear, 3.3V, Output Type:Fixed, Input Voltage Min:0V, Input Voltage Max:7.5V, Fixed Output Voltage Nom.:3.3V, Adjustable Output Voltage Min:-, Adjustable Output Voltage Max:-, Output Current:1A, Dropout Voltage Vdo:500Mv, rohs Compliant: Yes |Texas Instruments LM3940IS-3.3/NOPB RoHS: Compliant Min Qty: 1 Package Multiple: 1 Date Code: 0 Container: Bulk 0
  • 1 $5.4900
  • 10 $4.7500
  • 25 $4.1500
  • 50 $3.9000
  • 100 $3.3900
  • 250 $2.8300
  • 500 $2.7500
$2.7500 / $5.4900 Buy Now
DISTI # LM3940IS-3.3/NOPB-ND
DigiKey IC REG LINEAR 3.3V 1A TO263 Min Qty: 1 Lead time: 12 Weeks Container: Tube 1826
In Stock
  • 1 $2.3600
  • 10 $1.7480
  • 45 $1.5167
  • 135 $1.4000
  • 270 $1.3429
  • 540 $1.2958
  • 1,035 $1.2593
  • 2,520 $1.2190
  • 5,040 $1.1939
$1.1939 / $2.3600 Buy Now
DISTI # 926-LM3940IS-3.3NOPB
Mouser Electronics LDO Voltage Regulators 1A LDO REG A 926-LM3940ISX3.3NOPB RoHS: Compliant 1154
  • 1 $2.3600
  • 10 $1.7500
  • 25 $1.5200
  • 90 $1.4000
  • 270 $1.3400
  • 540 $1.2900
  • 1,035 $1.2500
  • 5,040 $1.1600
$1.1600 / $2.3600 Buy Now
Bristol Electronics   Min Qty: 3 24
  • 3 $2.4000
  • 10 $1.8000
$1.8000 / $2.4000 Buy Now
Bristol Electronics   18
RFQ
Bristol Electronics   7
RFQ
Bristol Electronics   3
RFQ
Quest Components 3.3 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, PSSO3 19
  • 1 $3.2000
  • 3 $2.4000
  • 11 $2.0000
$2.0000 / $3.2000 Buy Now
Quest Components 3.3 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, PSSO3 19
  • 1 $15.0000
  • 3 $11.0000
  • 8 $10.0000
$10.0000 / $15.0000 Buy Now
DISTI # LM3940IS-3.3/NOPB
TME IC: voltage regulator, LDO,fixed, 3.3V, 1A, TO263, SMD, tube, Ch: 1 Min Qty: 1 923
  • 1 $1.9700
  • 3 $1.8100
  • 10 $1.6300
  • 45 $1.4600
  • 90 $1.3100
  • 225 $1.1000
$1.1000 / $1.9700 Buy Now
DISTI # LM3940IS-3.3
TME IC: voltage regulator, LDO,fixed, 3.3V, 1A, TO263, SMD, tube, Ch: 1 Min Qty: 1 1
  • 1 $2.2000
  • 3 $2.1000
  • 10 $1.7900
  • 25 $1.5100
$1.5100 / $2.2000 Buy Now
DISTI # LM3940IS-3.3/NOPB
Chip One Stop Semiconductors RoHS: Compliant pbFree: Yes Min Qty: 1 Lead time: 0 Weeks, 1 Days Container: Bulk 206
  • 1 $2.2300
  • 10 $1.6400
  • 50 $1.4200
  • 100 $1.2900
  • 450 $1.2800
  • 900 $1.2100
  • 1,800 $1.1800
  • 3,600 $1.0600
  • 7,200 $1.0400
$1.0400 / $2.2300 Buy Now
Win Source Electronics IC REG LDO 3.3V 1A DDPAK 2775
  • 25 $2.3460
  • 60 $1.9251
  • 93 $1.8649
  • 128 $1.8047
  • 166 $1.7445
  • 222 $1.5641
$1.5641 / $2.3460 Buy Now

Part Details for LM3940IS-3.3/NOPB

LM3940IS-3.3/NOPB CAD Models

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LM3940IS-3.3/NOPB Part Data Attributes

Parametric Data
LM3940IS-3.3/NOPB Texas Instruments
Buy Now Datasheet
Compare Parts:
LM3940IS-3.3/NOPB Texas Instruments 1-A, low-dropout voltage regulator for 5-V to 3.3-V conversion 3-DDPAK/TO-263 -40 to 125
Pbfree Code Yes
Rohs Code No
Part Life Cycle Code Active
Ihs Manufacturer TEXAS INSTRUMENTS INC
Part Package Code D2PAK
Package Description ROHS COMPLIANT, TO-263, 3 PIN
Pin Count 4
Reach Compliance Code not_compliant
ECCN Code EAR99
HTS Code 8542.39.00.01
Samacsys Manufacturer Texas Instruments
Adjustability FIXED
Dropout Voltage1-Max 1 V
Dropout Voltage1-Nom 0.31 V
Input Voltage Absolute-Max 7.5 V
Input Voltage-Max 5.5 V
Input Voltage-Min 4.5 V
JESD-30 Code R-PSSO-G3
JESD-609 Code e3
Length 10.16 mm
Line Regulation-Max 0.04%
Load Regulation-Max 0.08%
Moisture Sensitivity Level 3
Number of Functions 1
Number of Outputs 1
Number of Terminals 3
Operating Temperature TJ-Max 125 °C
Operating Temperature TJ-Min -40 °C
Operating Temperature-Max 125 °C
Operating Temperature-Min -40 °C
Output Current1-Max 1 A
Output Voltage1-Max 3.47 V
Output Voltage1-Min 3.13 V
Output Voltage1-Nom 3.3 V
Package Body Material PLASTIC/EPOXY
Package Code TO-263
Package Equivalence Code SMSIP3H,.55TB
Package Shape RECTANGULAR
Package Style SMALL OUTLINE
Packing Method TUBE
Peak Reflow Temperature (Cel) 245
Qualification Status Not Qualified
Regulator Type FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
Seated Height-Max 4.83 mm
Surface Mount YES
Technology BIPOLAR
Terminal Finish Matte Tin (Sn)
Terminal Form GULL WING
Terminal Pitch 2.54 mm
Terminal Position SINGLE
Time@Peak Reflow Temperature-Max (s) 30
Voltage Tolerance-Max 5.2%
Width 8.635 mm

Alternate Parts for LM3940IS-3.3/NOPB

This table gives cross-reference parts and alternative options found for LM3940IS-3.3/NOPB. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of LM3940IS-3.3/NOPB, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.

Part Number Manufacturer Composite Price Description Compare
LM3940ISX-3.3/NOPB National Semiconductor Corporation Check for Price IC VREG 3.3 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, PSSO3, ROHS COMPLIANT, TO-263, 3 PIN, Fixed Positive Single Output LDO Regulator LM3940IS-3.3/NOPB vs LM3940ISX-3.3/NOPB
LM3940ISX-3.3 National Semiconductor Corporation Check for Price IC VREG 3.3 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, PSSO3, TO-263, 3 PIN, Fixed Positive Single Output LDO Regulator LM3940IS-3.3/NOPB vs LM3940ISX-3.3
LM3940IS-3.3 National Semiconductor Corporation Check for Price IC VREG 3.3 V FIXED POSITIVE LDO REGULATOR, 1 V DROPOUT, PSSO3, TO-263, 3 PIN, Fixed Positive Single Output LDO Regulator LM3940IS-3.3/NOPB vs LM3940IS-3.3
Part Number Manufacturer Composite Price Description Compare
LM3940ISX-3.3 Texas Instruments Check for Price 1-A, low-dropout voltage regulator for 5-V to 3.3-V conversion 3-DDPAK/TO-263 -40 to 125 LM3940IS-3.3/NOPB vs LM3940ISX-3.3

LM3940IS-3.3/NOPB Related Parts

LM3940IS-3.3/NOPB Frequently Asked Questions (FAQ)

  • The maximum input voltage is 15V, but it's recommended to keep it below 12V for reliable operation.

  • To ensure a stable output voltage, make sure to use a suitable output capacitor (e.g., 10uF) and a minimum load current of 1mA. Also, keep the input voltage within the recommended range.

  • The maximum output current is 1A, but it's recommended to keep it below 500mA for reliable operation and to prevent overheating.

  • To prevent overheating, ensure good airflow around the device, use a heat sink if necessary, and keep the output current below 500mA. Also, avoid operating the device in high-temperature environments.

  • Yes, the LM3940IS-3.3/NOPB is suitable for high-reliability applications due to its high MTBF (Mean Time Between Failures) rating and its compliance with various industry standards (e.g., AEC-Q100).

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