LM2937 500 mA Low Dropout Regulator | TI.com

LM2937 (ACTIVE)

500 mA Low Dropout Regulator

500 mA Low Dropout Regulator - LM2937
Datasheet
 

Description

The LM2937 is a positive voltage regulator capable of supplying up to 500 mA of load current. The use of a PNP power transistor provides a low dropout voltage characteristic. With a load current of 500 mA the minimum input to output voltage differential required for the output to remain in regulation is typically 0.5 V (1-V ensured maximum over the full operating temperature range). Special circuitry has been incorporated to minimize the quiescent current to typically only 10 mA with a full 500-mA load current when the input to output voltage differential is greater than 3 V.

The LM2937 requires an output bypass capacitor for stability. As with most low dropout regulators, the ESR of this capacitor remains a critical design parameter, but the LM2937 includes special compensation circuitry that relaxes ESR requirements. The device is stable for all ESR below 3 Ω. This allows the use of low ESR chip capacitors.

Ideally suited for automotive applications, the LM2937 will protect itself and any load circuitry from reverse battery connections, two-battery jumps, and up to 60-V/−50-V load dump transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in.

Features

  • Fully Specified for Operation Over −40°C
    to 125°C
  • Output Current in Excess of 500 mA
  • Output Trimmed for 5% Tolerance Under all Operating
    Conditions
  • Typical Dropout Voltage of 0.5 V at Full Rated Load
    Current
  • Wide Output Capacitor ESR Range, up to 3 Ω
  • Internal Short Circuit and Thermal Overload Protection
  • Reverse Battery Protection
  • 60-V Input Transient Protection
  • Mirror Image Insertion Protection

View more

Parametrics Compare all products in Linear regulators (LDO)

 
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)
LM2937 LM2937-2.5 LM2937-3.3
Fixed Output     Fixed Output     Fixed Output    
0.5     0.5     0.5    
26     26     26    
6     4.75     4.75    
15     2.5     3.3    
5     2.5     3.3    
5
8
10
12
15    
2.5     3.3    
DDPAK/TO-263 | 3
SOT-223 | 4
TO-220 | 3    
DDPAK/TO-263 | 3
SOT-223 | 4
TO-220 | 3    
DDPAK/TO-263 | 3
SOT-223 | 4
TO-220 | 3    
   
   
   
1     1     1    
-40 to 125
-40 to 85    
-40 to 125
-40 to 85    
-40 to 125
-40 to 85    
42     42     42    
150     75     99    
0.65 | 1ku     0.65 | 1ku     0.65 | 1ku    
Catalog     Catalog     Catalog    
Ceramic     Ceramic     Ceramic    
57     57     57    
5     3     5    
500     500     500    
2     2     2    
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)    
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)    
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)