Micropower, 150mA Low-Dropout CMOS Voltage Regulator

Features

• Excellent line transient response: ±2mV typ.
  
• Excellent PSRR: -60dB at 1kHz typ.
  
• Low quiescent current of 29µA typ.
  
• 1.8 to 5.5V input voltage range
  
• Small SC70-5 and SOT23-5 packages
  
• Fast turn-on time of 30µs typ.
  
• Typ. < 1nA quiescent current in shutdown
  
• Guaranteed 150mA output current
  
• Output voltage range: 1.3V to 3.3V
  
• Logic controlled enable 0.4V/0.9V
  
• Good load transient response of 50mVpp typ.
  
• Thermal-overload and short-circuit protection
  
• -40°C to +125°C junction temperature range

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 pin, the power consumption is reduced to virtually zero.
The LP5951 is designed to be stable with small 1µF/1.5µF ceramic capacitors.
The LP5951 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 SOT23-5 and SC70-5 package.
The device is available in fixed output voltages in the range of 1.3V to 3.3V. For availability, please contact your local NSC sales office.