LP38798
LP38798 is 800-mA Ultra-Low-Noise High-PSRR LDO manufactured by Texas Instruments.
Features
- 1 Wide Operating Input Voltage Range: 3 V to 20 V
- Ultra-Low Output Noise: 5 µVRMS (10 Hz to 100 k Hz)
- High PSRR: 90 d B at 10 k Hz, 60 d B at 100 k Hz
- ±1% Output Voltage Initial Accuracy (TJ = 25°C)
- Very Low Dropout: 200 m V (Typical) at 800 m A
- Stable with Ceramic or Tantalum Output
Capacitors
- Excellent Line and Load Transient Response
- Current Limit and Overtemperature Protection
- Create a Custom Design Using the LP38798 With the WEBENCH® Power Designer
2 Applications
- RF Power Supplies: PLLs, VCOs, Mixers, LNAs
- Tele Infrastructure
- Wireless Infrastructure
- Very Low-Noise Instrumentation
- Precision Power Supplies
- High-Speed, High-Precision Data Converters
3 Description
The LP38798-ADJ is a high-performance, low-noise LDO that can supply up to 800 m A output current. Designed to meet the requirements of sensitive RF/Analog circuitry, the LP38798-ADJ 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 LP38798SD-ADJ is stable with both ceramic and tantalum output capacitors and requires a minimum output capacitance of only 1 µF for stability.
The LP38798-ADJ can operate over a wide input voltage range (3 V to 20 V) making it well suited for many post-regulation applications.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
WSON (12)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet. space space space space space space
Simplified Schematic
1 IN
12 OUT
ON OFF
+ CIN CCP
3 IN(CP)
10 OUT(FB)
4 CP
9...
