Richtek USA Inc. RT9193-30GB

Description
The RT9193 is an ultra-low noise, ultra-fast CMOS LDO regulator designed for portable RF and wireless applications. It is optimized for battery-powered systems, delivering ultra-low noise and low quiescent current. The RT9193 also works with low-ESR ceramic capacitors, reducing board space requirements. It consumes less than 0.01μA in shutdown mode and has a fast turn-on time of less than 50μs. Other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio.

Features
Ultra-low noise for RF applications
Ultra-fast response in line/load transient
Quick start-up (typically 50μs)
<0.01μA standby current when shutdown
Low dropout: 220mV @ 300mA
Wide operating voltage ranges: 2.5V to 5.5V
TTL-logic-controlled shutdown input
Low temperature coefficient
Current limiting protection
Thermal shutdown protection
Only 1μF output capacitor required for stability
High power supply rejection ratio
Custom voltage available
RoHS compliant and 100% lead (Pb)-free

Applications
CDMA/GSM cellular handsets
Battery-powered equipment
Laptops, palmtops, notebook computers
Hand-held instruments
PCMCIA cards
Portable information appliances