LP5951 150-mA, low-IQ, low-dropout voltage regulator with enable | TI.com

LP5951
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150-mA, low-IQ, low-dropout voltage regulator with enable

150-mA, low-IQ, low-dropout voltage regulator with enable - LP5951
Datasheet
LP5951 Micropower, 150-mA Low-Dropout CMOS Voltage Regulator datasheet (Rev. G)
 

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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

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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)
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     0.20 | 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     0.20 | 1ku     Catalog     25     2     75     0.05     4DSBGA: 2 mm2: 1.3 x 1.5 (DSBGA | 4)