LM340 1.5A, Fixed Output Linear Regulator | TI.com

LM340 (ACTIVE) 1.5A, Fixed Output Linear Regulator

 

Recommended alternative parts

  • TLV767  -  A high-accuracy, 1-A LDO regulator with low IQ & foldback current limit
  • LM317  -  Higher current output 1.5-A LDO regulator

Other devices and data sheet

Other device variants can also be found in the  LM340-MIL product page

Description

The LM340 and LM7805 Family monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.5-A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.

Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply.

LM7805 is also available in a higher accuracy and better performance version (LM340A). Refer to LM340A specifications in the LM340A Electrical Characterisitcs table.

Features

  • Output Current up to 1.5 A
  • Available in Fixed 5-V, 12-V, and 15-V Options
  • Output Voltage Tolerances of ±2% at TJ = 25°C (LM340A)
  • Line Regulation of 0.01% / V of at 1-A Load (LM340A)
  • Load Regulation of 0.3% / A (LM340A)
  • Internal Thermal Overload, Short-Circuit and SOA Protection
  • Available in Space-Saving SOT-223 Package
  • Output Capacitance Not Required for Stability

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Parametrics

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Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Fixed output options (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Noise (uVrms) Approx. price (US$) Rating PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
LM340 Order now Fixed Output     1.5     35     7.5     15     5     5
12
15    
DDPAK/TO-263 | 3
SOT-223 | 4
TO-220 | 3    
    1     -40 to 125
0 to 125    
24     40     0.46 | 1ku     Catalog     50     2.5     2000     8     3DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 3)
4SOT-223: 46 mm2: 7 x 6.5 (SOT-223 | 4)
See datasheet (TO-220)    
LM7800 Order now Fixed Output     1.5     30     7.5     15     5     5
12
15    
DDPAK/TO-263 | 3
SOT-223 | 4
TO-220 | 3    
    1     0 to 125     24     40     0.46 | 1ku     Catalog     48     3     2000     6     3DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 3)
4SOT-223: 46 mm2: 7 x 6.5 (SOT-223 | 4)
See datasheet (TO-220)    
LM78L Order now Fixed Output     0.1     30     6.7     15     5     5
6.2
9
12
15    
DSBGA | 8
SOIC | 8
TO-92 | 3    
    1     -40 to 125
-40 to 85
0 to 125    
108     40     0.20 | 1ku     Catalog     40     2     1600     2     See datasheet (DSBGA)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
3TO-92: 19 mm2: 3.68 x 5.2 (TO-92 | 3)    
LM78M Order now Fixed Output     0.5     35     7.2     15     5     5     TO-220 | 3
TO-252 | 3    
    1     -40 to 125     38     40     0.46 | 1ku     Catalog     40     3     1800     4     See datasheet (TO-220)
3TO-252: 40 mm2: 6.1 x 6.58 (TO-252 | 3)