1FEATURES
2• Ultra-Low Output Noise: 4 μVRMS (10Hz to 100
kHz)
• High PSRR: 70db at 1 kHz; 60dB at 10 kHz
• Wide Operating Input Voltage Range: 4.5V to 15V
• ±1.0% Output Voltage Initial Accuracy (TJ =
25°C)
• Very Low Dropout : 250 mV (typical) at 800mA
• Stable with Ceramic or Tantalum Output
Capacitors
• Excellent Line and Load Transient Response
• Over-Current and Over-Temperature
Protection

APPLICATIONS
• RF and VCO Power
• Wireless LAN Devices
• Wireless Cable Modems
• Low Noise Post Regulation

DESCRIPTION
The LP38788-ADJ is a high performance linear regulator capable of supplying 800 mA output current. Designed
to meet the requirements of sensitive RF/Analog circuitry, the LP38788 implements a novel linear topology on an
advanced CMOS process to deliver ultra-low output noise and high PSRR at switching power supply
frequencies. The LP38788-ADJ is stable with both ceramic and tantalum output capacitors and requires a
minimum output capacitor of only 1 μF for stability.
The LP38788-ADJ can operate over a wide input voltage range (4.5V to 15V) making it well suited for many post
regulation applications.
Available in a 12-Lead LLP package (4.0 x 4.0 x 0.8 mm).