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

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)
LP2950 Order now Fixed Output     0.1     30     2     5     3     3
3.3
5    
TO-92 | 3         1     -40 to 125     97     100     0.12 | 1ku     Catalog     57     3     110     0.075     3TO-92: 19 mm2: 3.68 x 5.2 (TO-92 | 3)    
LP2950-N Order now Fixed Output     0.1     30     2.3     5     3     3
3.3
5    
TO-252 | 3
TO-92 | 3    
    1     -40 to 125     51     100     0.25 | 1ku     Catalog     51     3     380     0.075     3TO-252: 40 mm2: 6.1 x 6.58 (TO-252 | 3)
3TO-92: 19 mm2: 3.68 x 5.2 (TO-92 | 3)    
LP2951 Order now Adjustable Output
Fixed Output    
0.1     30     2     29     1.2     3
3.3
5    
SOIC | 8
SON | 8    
Enable
Power Good    
1     -40 to 125     52     160     0.18 | 1ku     Catalog     57     3     380     0.075     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8SON: 9 mm2: 3 x 3 (SON | 8)    
LP2951-N Order now Adjustable Output
Fixed Output    
0.1     30     2.3     29     1.24     3
3.3
5    
PDIP | 8
SOIC | 8
VSSOP | 8
WSON | 8    
Enable
Power Good    
1     -40 to 125     43     160     0.25 | 1ku     Catalog     51     2.5     380     0.075     8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
8WSON: 16 mm2: 4 x 4 (WSON | 8)