LP2951 30V, 100mA Micropower Voltage Regulators with Shutdown | TI.com

LP2951 (ACTIVE) 30V, 100mA Micropower Voltage Regulators with Shutdown

 

Recommended alternative parts

  • TPS7A25  -  An 18-V, 300-mA LDO regulator with power-good and ultra-low IQ (2.5 μA)
  • LP2950  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   Has lower pin count and fixed voltage option

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

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LP2951

  Min   Max Range
Vin  V 2.3 to 30.0V
Vout  V 1.235 to 29V
Iout  A ≤ 0.1A
Ambient Temp  °C -40 to 125°C

Parametrics

Compare all products in Linear regulators (LDO) Email Download to Excel
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$) PSRR @ 100 KHz (dB) Accuracy (%) Vdo (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
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     57     3     380     0.075     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
See datasheet (SON)    
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     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     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-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     51     2.5     380     0.075     See datasheet (PDIP)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
See datasheet (WSON)