1 Features
1• Input Range: 2.5 V to 6 V
• Accurate Output Voltage: ±75 mV / 2%
• Typical Dropout with 150 mA Load: 60 mV
• Virtually Zero Quiescent Current When Disabled
• Low Output Voltage Noise
• Stable With a 1-μF Output Capacitor
• Output Current: 150 mA
• Fast Turnon: 30 μs (Typical)
• Fast Turnoff: 175 μs (Typical)
• Stable With Ceramic Capacitor
• Logic Controlled Enable
• Fast Turnon
• Active Disable for Fast Turnoff
• Thermal-Overload and Short-Circuit Protection
• −40 to +125°C Junction Temperature Range for
Operation

2 Applications
• GSM Portable Phones
• CDMA Cellular Handsets
• Wideband CDMA Cellular Handsets
• Bluetooth Devices
• Portable Information Appliances

3 Description
The LP3995 linear regulator is designed to meet the
requirements of portable battery-powered applications, providing an accurate output voltage
with low noise and low quiescent current. Ideally
suited for powering RF and analog devices, this
device can also be used to meet more general circuit needs in which a fast turnoff is essential.
For battery-powered applications the low dropout and low ground current provided by the device allows the
lifetime of the battery to be maximized. The
Enable(/Disable) control function allows the system to
further extend the battery lifetime by reducing the
power consumption to virtually zero. This function
also incorporates an active discharge circuit on the
output for faster device shutdown. Where the fast
turnoff is not required the LP3999 linear regulator is
recommended. The LP3995 also features internal protection against short-circuit currents and
overtemperature conditions.
The LP3995 is designed to be stable with small 1-μF
ceramic capacitors. The small outline of the LP3995 DSBGA package with the required ceramic capacitors
can realize a system application within minimal board
area. Performance is specified for a −40°C to +125°C
temperature range.
The LP3995 is available in fixed output voltages from
1.5 V to 3.3 V, in DSBGA or WSON packages. For
other package options or output-voltage options,
contact your local TI sales office.