LP2950 Adjustable Micropower Voltage Regulator With Shutdown | TI.com

LP2950 (ACTIVE)

Adjustable Micropower Voltage Regulator With Shutdown

 

Description

The LP2950 and LP2951 devices are bipolar, low-dropout voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V. The easy-to-use, 3-pin LP2950 is available in fixed-output voltages of 5 V, 3.3 V, and 3 V. However, the 8-pin LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 outputs a fixed 5 V, 3.3 V, or 3 V (depending on the version). Alternatively, by leaving the SENSE and VTAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.235 V to 30 V.

Features

  • Wide Input Range: Up to 30 V
  • Rated Output Current of 100 mA
  • Low Dropout: 380 mV (Typ) at 100 mA
  • Low Quiescent Current: 75 µA (Typ)
  • Tight Line Regulation: 0.03% (Typ)
  • Tight Load Regulation: 0.04% (Typ)
  • High VO Accuracy
    • 1.4% at 25°C
    • 2% Over Temperature
  • Can Be Used as a Regulator or Reference
  • Stable With Low ESR (>12 mΩ) Capacitors
  • Current- and Thermal-Limiting Features
  • LP2950 Only (3-Pin)
    • Fixed-Output Voltages of 5 V, 3.3 V, and 3 V
  • LP2951 Only (8-Pin Package)
    • Fixed- or Adjustable-Output Voltages:
      5 V/ADJ, 3.3 V/ADJ, and 3 V/ADJ
    • Low-Voltage Error Signal on Falling Output
    • Shutdown Capability
    • Remote Sense Capability for Optimal Output
      Regulation and Accuracy

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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)
LP2950 LP2950-N LP2951 LP2951-N
Fixed Output     Fixed Output     Adjustable Output
Fixed Output    
Adjustable Output
Fixed Output    
0.1     0.1     0.1     0.1    
30     30     30     30    
2     2.3     2     2.3    
5     5     29     29    
3     3     1.2     1.24    
3
3.3
5    
3
3.3
5    
3
3.3
5    
3
3.3
5    
TO-92 | 3     TO-252 | 3
TO-92 | 3    
SOIC | 8
SON | 8    
PDIP | 8
SOIC | 8
VSSOP | 8
WSON | 8    
N/A     N/A     Enable
Power Good    
Enable
Power Good    
1     1     1     1    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
97     51     52     43    
100     100     160     160    
0.12 | 1ku     0.25 | 1ku     0.18 | 1ku     0.25 | 1ku    
Catalog     Catalog     Catalog     Catalog    
Ceramic     Ceramic     Non-Ceramic     Ceramic    
57     51     57     51    
3     3     3     2.5    
110     380     380     380    
0.075     0.075     0.075     0.075    
3TO-92: 19 mm2: 3.68 x 5.2 (TO-92 | 3)     3TO-252: 40 mm2: 6.1 x 6.58 (TO-252 | 3)
3TO-92: 19 mm2: 3.68 x 5.2 (TO-92 | 3)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
See datasheet (SON)    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
See datasheet (WSON)