LP2951-N Series of Adjustable Micropower Voltage Regulators | TI.com

LP2951-N (ACTIVE)

Series of Adjustable Micropower Voltage Regulators

Series of Adjustable Micropower Voltage Regulators - LP2951-N
 

Description

The LP2950-N and LP2951-N are micropower voltage regulators with very low quiescent current (75 µA typical) and very low dropout voltage (typical 40 mV at light loads and 380 mV at 100 mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the device increases only slightly in dropout, prolonging battery life.

Careful design of the LP2950-N/LP2951-N has minimized all contributions to the error budget. This includes a tight initial tolerance (0.5% typical), extremely good load and line regulation (0.05% typical) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.

One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5-V, 3-V, or 3.3-V output (depending on the version), or programmed from 1.24 V to 29 V with an external pair of resistors.

The LP2950-N is available in the surface-mount TO-252 package and in the popular 3-pin TO-92 package for pin-compatibility with older 5-V regulators. The 8-pin LP2951-N is available in plastic, ceramic dual-in-line, WSON, or metal can packages and offers additional system functions.

Features

  • Input Voltage Range: 2.3 V to 30 V
  • 5-V, 3-V, and 3.3-V Output Voltage Versions Available
  • High Accuracy Output Voltage
  • Ensured 100-mA Output Current
  • Extremely Low Quiescent Current
  • Low Dropout Voltage
  • Extremely Tight Load and Line Regulation
  • Very Low Temperature Coefficient
  • Use as Regulator or Reference
  • Needs Minimum Capacitance for Stability
  • Current and Thermal Limiting
  • Stable With Low-ESR Output Capacitors (10 mΩ to 6 Ω)
  • LP2951-N Versions Only:
    • Error Flag Warns of Output Dropout
    • Logic-Controlled Electronic Shutdown
    • Output Programmable From 1.24 V to 29 V

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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 @ 100KHz (dB)
Accuracy (%)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package Size: mm2:W x L (PKG)
LP2951-N LP2950 LP2950-N LP2951
Adjustable Output
Fixed Output    
Fixed Output     Fixed Output     Adjustable Output
Fixed Output    
0.1     0.1     0.1     0.1    
30     30     30     30    
2.3     2     2.3     2    
29     5     5     29    
1.24     3     3     1.2    
3
3.3
5    
3
3.3
5    
3
3.3
5    
3
3.3
5    
PDIP | 8
SOIC | 8
VSSOP | 8
WSON | 8    
TO-92 | 3     TO-252 | 3
TO-92 | 3    
SOIC | 8
SON | 8    
Enable
Power Good    
N/A     N/A     Enable
Power Good    
1     1     1     1    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
43     97     51     52    
160     100     100     160    
0.25 | 1ku     0.12 | 1ku     0.25 | 1ku     0.18 | 1ku    
Catalog     Catalog     Catalog     Catalog    
Ceramic     Ceramic     Ceramic     Non-Ceramic    
51     57     51     57    
2.5     3     3     3    
380     110     380     380    
0.075     0.075     0.075     0.075    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
See datasheet (WSON)    
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)