NSC LM3490IM5-12, LM3490IM5X-5.0, LM3490IM5X-3.3, LM3490IM5X-12, LM3490IM5-5.0 Datasheet
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June 1999
LM3490
100 mA, SOT-23, Quasi Low-Dropout Linear Voltage
Regulator with Logic-Controlled ON/OFF
General Description
The LM3490 is an integrated linear voltage regulator. It features operation from an input as high as 30V and a guaranteed maximum dropout of 1.2V at the full 100 mA load. Standard packaging for the LM3490 is the 5-lead SOT-23 package. A logic-controlled ON/OFF feature makes the LM3490 ideal for powering subsystems ON and OFF as needed.
The 5, 12, and 15V members of the LM3490 series are intended as tiny alternatives to industry standard LM78LXX series and similar devices. The 1.2V quasi low dropout of LM3490 series devices makes them a nice fit in many applications where the 2 to 2.5V dropout of LM78LXX series devices precludes their (LM78LXX series devices) use.
The LM3490 series features a 3.3V member. The SOT packaging and quasi low dropout features of the LM3490 series converge in this device to provide a very nice, very tiny 3.3V, 100 mA bias supply that regulates directly off the system 5V±5% power supply.
Key Specifications
n30V maximum input for operation
n1.2V guaranteed maximum dropout over full load and temperature ranges
n100 mA guaranteed load current
n±5% guaranteed output voltage tolerance over full load and temperature ranges
n−40 to +125ÊC junction temperature range for operation
Features
n3.3, 5, 12, and 15V versions available
nLogic-controlled ON/OFF
nPackaged in the tiny 5-lead SOT-23 package
Applications
nTiny alternative to LM78LXX series and similar devices
nTiny 5V±5% to 3.3V, 100 mA converter
nPost regulator for switching DC/DC converter
nBias supply for analog circuits
Typical Application Circuit
DS100071-2
Connection Diagram
DS100071-1
Top View
SOT-23 Package
5-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package
Package Code MA05B(Note 1)
Controlled-Logic with Regulator Voltage Linear Dropout-Low Quasi 23,-SOT mA, 100 LM3490
ON/OFF
© 1999 National Semiconductor Corporation |
DS100071 |
www.national.com |
Ordering Information
Output |
Order |
Package |
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Voltage |
Number |
Marking |
Comments |
(V) |
(Note 2) |
(Note 3) |
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3.3 |
LM3490IM5-3.3 |
L78B |
250 Units on Tape and Reel |
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3.3 |
LM3490IM5X-3.3 |
L78B |
3k Units on Tape and Reel |
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5 |
LM3490IM5-5.0 |
L79B |
250 Units on Tape and Reel |
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5 |
LM3490IM5X-5.0 |
L79B |
3k Units on Tape and Reel |
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12 |
LM3490IM5-12 |
L80B |
250 Units on Tape and Reel |
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12 |
LM3490IM5X-12 |
L80B |
3k Units on Tape and Reel |
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15 |
LM3490IM5-15 |
L81B |
250 Units on Tape and Reel |
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15 |
LM3490IM5X-15 |
L81B |
3k Units on Tape and Reel |
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www.national.com |
2 |
Absolute Maximum Ratings (Note 4)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Input Voltage (IN to GND) |
35V |
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5.5V |
Voltage ON/OFF |
to GND |
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Power Dissipation (Note 5) |
400 mW |
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Junction Temp. (TJ) (Note 5) |
+150ÊC |
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Ambient Storage Temp. |
−65 to +150ÊC |
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Soldering Time, Temp. (Note 6) |
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Wave |
4sec., 260ÊC |
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Infrared |
10sec., 240ÊC |
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Vapor Phase |
75sec., 219ÊC |
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ESD (Note 7) |
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1.0kV |
ON/OFF |
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All Other Pins |
2.0kV |
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Operating Ratings (Note 4)
Maximum Input Voltage (IN to GND) |
30V |
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0 to 5V |
Voltage ON/OFF |
to GND |
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Junction Temperature (TJ) |
−40 to +125ÊC |
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Maximum Power Dissipation (Note 8) |
300 mW |
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Electrical Characteristics
LM3490-3.3, LM3490-5.0
VIN = VNOM + 1.5V unless otherwise noted. Typicals and limits appearing in normal type apply for TA = TJ = 25ÊC. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40 to +125ÊC. (Notes 9, 10, 11)
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Nominal Output Voltage (VNOM) |
3.3V |
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5.0V |
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Units |
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Symbol |
Parameter |
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Conditions |
Typical |
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Limit |
Typical |
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Limit |
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VOUT |
Output Voltage |
1 mA ≤ IOUT ≤ 100 mA |
3.30 |
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5.00 |
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V |
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3.17 |
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4.80 |
V(min) |
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3.14 |
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4.75 |
V(min) |
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3.43 |
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5.20 |
V(max) |
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3.46 |
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5.25 |
V(max) |
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VOUT |
Line Regulation |
VNOM + 1.5V ≤ VIN ≤ 30V, |
7 |
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9 |
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mV |
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IOUT = 1 mA |
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25 |
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25 |
mV(max) |
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VOUT |
Load Regulation |
10 mA ≤ IOUT ≤ 100 mA |
15 |
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15 |
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mV |
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40 |
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40 |
mV(max) |
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IGND |
Ground Pin |
VNOM + 1.5V ≤ VIN ≤ 30V, |
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Current |
No Load |
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= 5V |
2 |
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2 |
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mA |
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VON/OFF |
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4 |
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4 |
mA(max) |
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= 0V |
0.1 |
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0.1 |
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µA |
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VON/OFF |
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5 |
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5 |
µA(max) |
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VIN - |
Dropout Voltage |
IOUT = 10 mA |
0.7 |
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0.7 |
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V |
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VOUT |
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0.9 |
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0.9 |
V(max) |
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1.0 |
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1.0 |
V(max) |
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IOUT = 100 mA |
0.9 |
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0.9 |
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V |
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1.1 |
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1.1 |
V(max) |
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1.2 |
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1.2 |
V(max) |
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en |
Output Noise |
VIN = 10V, |
100 |
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150 |
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µVrms |
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Voltage |
Bandwidth: 10 Hz to 100 kHz |
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VIL |
Maximum Low |
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0.2 |
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0.2 |
V(max) |
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Level Input |
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Voltage at |
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ON/OFF |
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VIH |
Minimum High |
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2.0 |
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2.0 |
V(min) |
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Level Input |
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Voltage at |
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ON/OFF |
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IIL |
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= 0V |
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−1 |
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−1 |
µA(max) |
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VON/OFF |
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IIH |
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= 5V |
1 |
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1 |
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µA |
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VON/OFF |
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20 |
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20 |
µA(max) |
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3 |
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