Features: Small SOT23-5 package
Low dropout voltage: 120 mV Typ @ 1mA
High output voltage accuracy: 0.2%
Source and Sink current output: ±5mA
Supply current: 160µATyp.
Low Temperature Coefficient: 50ppm/˚C
Enable pin
Fixed output voltages:1.8,2.048,2.5,3.0,3.3,4.096 and 5.0V
Industrial temperature Range: −40˚Cto+85˚C
(For extended temperature range,−40˚C to 125˚C,contact National Semiconductor)ApplicationPortable,battery powered equipment
Instrumentation and process control
Automotive & Industrial
Test equipment
Data acquisition systems
Precision regulators
Battery chargers
Base stations
Communications
Medical equipmentSpecificationsMaximum Voltage on input or
enable pins−0.3Vto14V
Output Short-Circuit Duration Indefinite
Power Dissipation (TA= 25˚C) (Note2):
MA05B package−JA 80˚C/W
Power Dissipation 350mW
ESD Susceptibility (Note 3)
Human Body Model 2kV
Machine Model 200V
Lead Temperature:
Soldering, (10sec.)+260˚C
Vapor Phase (60sec.) +215˚C
Infrared (15sec.)+220˚C
Operating Range (Note1)
Storage Temperature Range−65˚Cto+150˚C
Ambient Temperature Range −40˚Cto+85˚C
Junction Temperature Range −40˚Cto+125˚C
| Initial Accuracy (+/-) Max |
0.2, 0.5 % |
| Reference Voltage |
1.8 V, 2.5 V, 5 V, 3 V, 4.096 V, 2.048 V, 3.3 V |
| Tempco, max (ppm/C) |
50 ppm |
| Input Min Voltage |
3.3 Volt |
| Input Max Voltage |
14 Volt |
| Dropout Voltage |
0.18 Volt |
| Quiescent Current |
0.16 mA |
| Output Current |
5 mA |
| Voltage Noise (rms) |
0.33 uV |
| Long Term Stability (ppm/1000hr) |
100 ppm |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| Automotive Selection Guide |
Yes |
| PowerWise |
Yes |
| View Using Catalog |
DescriptionThe LM4120 is a precision low power low dropout bandgap voltage reference with up to 5mA output current source and sink capability.
This series reference operates with input voltages as low as 2V and up to 12V consuming 160µA (Typ.) supply current. In power down mode,device current drops to less than 2µA. The LM4120 comes in two grades (A and Standard) and seven voltage options for greater flexibility.The best grade devices (A) have an initial accuracy of 0.2% ,while the stan-dard have aninitial accuracy of 0.5%,both with a tempco of 50ppm/˚C guaranteed from −40˚C to +125˚C.
The very low dropout voltage,low supply currentand power-down capability of the LM4120 makes this product an ideal choice for battery powered and portable applications.
The device performance is guaranteed over the industrial temperature range (−40˚C to +85˚C),while certain specs are guaranteed over the extended temperature range(−40˚C to +125˚C).Please contact National for fullspecifications over the extended temperature range.The LM4120 is available in a standard 5-pin SOT-23 package.
LM4120 Data Sheet
