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).