1 Features

• Input Voltage Range, 2.5 V to 5.5 V
• Output Voltage Range, 1.5 V to 4.5 V
• Stable with 0.47-μF Ceramic Input and Output Capacitors
• No Noise Bypass Capacitor Required
• Logic Controlled Enable
• Thermal-Overload and Short-Circuit Protection
• −40°C to 125°C Junction Temperature Range for Operation
• Output Current, 150 mA
• Low Output Voltage Noise, 6.5 μV_RMS
• PSRR, 75 dB at 1 kHz
• Output Voltage Tolerance, ±2%
• Virturally Zero I_Q (Disabled), < 1 µA
• Very Low I_Q (Enabled), 25 μA
• Start-up Time, 150 μs
• Low Dropout, 80 mV Typ.

2 Applications

• Cellular Phones
• PDA Handsets
• Wireless LAN Devices

3 Description

The LP5900 is an LDO capable of supplying 150-mA output current. Designed to meet the requirements of RF and analog circuits, the LP5900 device provides low noise, high PSRR, low quiescent current, and low line transient response figures. Using new innovative design techniques the LP5900 offers class-leading device noise performance without a noise bypass capacitor.

The device is designed to work with 0.47-μF input and output ceramic capacitors (no bypass capacitor required).

The device is available in a DSBGA (YZR) package and a WSON package; the device is also available in an extremely thin DSBGA (YPF) package. For all voltage and package options available today, see the Package Option Addendum (POA) at the end of this data sheet. For any other fixed output voltages from 1.5 V to 4.5 V in 25-mV steps and all other package options, contact your local TI Sales office.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic