1 Features
1• 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

2 Applications
General Purpose

3 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.