LP5951 Micropower 150mA Low-Dropout (LDO) CMOS Voltage Regulator | TI.com

LP5951
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Micropower 150mA Low-Dropout (LDO) CMOS Voltage Regulator

 

Recommended alternative parts

Description

The LP5951 regulator is designed to meet the requirements of portable battery-powered systems providing a regulated output voltage and low quiescent current. When switched to shutdown mode via a logic signal at the Enable (EN) pin, the power consumption is reduced to virtually zero.

The LP5951 is designed to be stable with small 1-µF ceramic capacitors. The device also features internal protection against short-circuit currents and over-temperature conditions.

Performance is specified for a –40°C to 125°C temperature range.

The device is available in fixed output voltages in the range of 1.3 V to 3.7 V. For availability, please contact your local TI sales office.

Features

  • Input Voltage Range: 1.8 V to 5.5 V
  • Output Voltage Range: 1.3 V to 3.7 V
  • Excellent Line Transient Response: ±2 mV (typical)
  • Excellent PSRR: –60 dB at 1 kHz typical
  • Low Quiescent Current of 29 µA typical
  • Small SC70-5 and SOT-23-5 Packages
  • Fast Turnon Time of 30 µs typ.
  • Typical < 1 nA Quiescent Current in Shutdown
  • Ensured 150-mA Output Current
  • Logic Controlled Enable 0.4 V/0.9 V
  • Good Load Transient Response of 50 mVpp (typical)
  • Thermal Overload and Short-Circuit Protection
  • -40°C to 125°C Junction Temperature Range

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$) Rating PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
LP5951 Order now Fixed Output     0.15     5.5     1.8     3.7     1.3     1.3
1.5
1.8
2
2.5
2.8
3
3.3
3.7    
SC70 | 5
SOT-23 | 5    
Enable     1     -40 to 125     196     125     0.23 | 1ku     Catalog     32     3     200     0.029     5SC70: 4 mm2: 2.1 x 2 (SC70 | 5)
5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)    
LP3991 Order now Fixed Output     0.3     3.6     1.65     3     1.2     1.2
1.3
1.5
2.8
3    
DSBGA | 4     Enable     1     -40 to 125     190     280     0.23 | 1ku     Catalog     25     2     75     0.05     4DSBGA: 2 mm2: 1.3 x 1.5 (DSBGA | 4)