1 Features

1• Input Voltage: 1.9 V to 5.2 V

• Operation From a Low Input Voltage: 1.9 V

• Accurate Output Voltage: 1.5 V ± 0.09 V

• Quiescent Current in Shutdown: < 1.5 μA

• Stable With an Output Capacitor: 1 μF

• Ensured Output Current: 30 mA

• Low Output Voltage Noise: 300 μVRMS short•

Low Quiescent Current: 29-μA Typical

• Stable With a Ceramic Capacitor space•

Logic Controlled Enable

• Fast Turnon and Turnoff

• Thermal-Overload and Short-Circuit Protection

• –40°C to +125°C Junction Temperature Range

2 Applications

• GSM Portable Phones

• CDMA Cellular Handsets

• Wideband CDMA Cellular Handsets

• Bluetooth Devices

• Portable Information Appliances

3 Description

The LP3992 regulator is designed to meet the

requirements of portable, battery-powered systems providing an accurate output voltage, low noise, and

low quiescent current. Battery life is prolonged by the

ability of the LP3992 to provide a 1.5-V output from

the low input voltage of 1.9 V. Additionally, when switched to a shutdown mode via a logic signal at the

enable (EN) pin, the power consumption is reduced

to virtually zero. The LP3992 also features short•

circuit and thermal-shutdown protection.

The LP3992 is designed to be stable with space•

saving ceramic capacitors as small as 1 μF.

Performance is specified for a –40°C to +125°C

temperature range.

For output voltages other than 1.5 V, and for

additional package options, contact TI.