LM120 Extended Temperature 1A Fixed Output Negative Voltage Regulator / LDO | TI.com

LM120 (ACTIVE)

Extended Temperature 1A Fixed Output Negative Voltage Regulator / LDO

 

Description

The LM120 series are three-terminal negative regulators with a fixed output voltage of −5V, −12V, and −15V, and up to 1.5A load current capability. Where other voltages are required, the LM137 and LM137HV series provide an output voltage range of −1.2V to −47V.

The LM120 need only one external component—a compensation capacitor at the output, making them easy to apply. Worst case specifications on output voltage deviation due to any combination of line, load or temperature variation assure satisfactory system operation.

Exceptional effort has been made to make the LM120 Series immune to overload conditions. The regulators have current limiting which is independent of temperature, combined with thermal overload protection. Internal current limiting protects against momentary faults while thermal shutdown prevents junction temperatures from exceeding safe limits during prolonged overloads.

Although primarily intended for fixed output voltage applications, the LM120 Series may be programmed for higher output voltages with a simple resistive divider. The low quiescent drain current of the devices allows this technique to be used with good regulation.

Features

  • Preset Output Voltage Error Less than ±3%
  • Preset Current Limit
  • Internal Thermal Shutdown
  • Operates with Input-Output Voltage Differential down to 1V
  • Excellent Ripple Rejection
  • Low Temperature Drift
  • Easily Adjustable to Higher Output Voltage

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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 Output capacitor type PSRR @ 100 KHz (dB) Accuracy (%) Vdo (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
LM120 Order now Fixed Output
Negative Output    
1.5     -7     -25     -5     -15     -5
-12
-15    
TO | 3    
   
1     -55 to 150     35     150     9.80 | 1ku     Catalog     Non-Ceramic     23     2     3000     1     3TO: 92 mm2: 9.14 x 10.03 (TO | 3)    
LM137 Samples not available Adjustable Output
Negative Output    
1.5     -4.2     -40     -1.2     -37       TO | 3    
   
1     -55 to 150     137     1110     9.27 | 1ku     Catalog     Non-Ceramic     30     4     3000     0.065     3TO: 92 mm2: 9.14 x 10.03 (TO | 3)    
LM337-N Order now Adjustable Output
Negative Output    
1.5     -4.2     -40     -1.2     -37       SOT-223 | 4
TO-220 | 3    
   
1     -40 to 125
0 to 125
0 to125    
23     38     0.61 | 1ku     Catalog     Non-Ceramic     35     2.4     2400     0.065     4SOT-223: 46 mm2: 7 x 6.5 (SOT-223 | 4)
See datasheet (TO-220)    
LM337L Order now Adjustable Output
Negative Output    
0.1     -4.2     -40     -1.2     -37       SOIC | 8
TO-92 | 3    
   
1     -25 to 100     111     38     0.26 | 1ku     Catalog     Non-Ceramic       1.4     2200     0.05     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
3TO-92: 19 mm2: 3.68 x 5.2 (TO-92 | 3)