200mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator

RT9178

The RT9178 is designed for portable RF and wireless applications with demanding performance and space requirements. The RT9178's performance is optimized for battery- powered systems to deliver ultra low noise and low quiescent current. A noise bypass pin is also available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The RT9178 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices.

The RT9178 consumes less than 0.01uA in shutdown mode and has fast turn-on time less than 100us. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the SOT-23-5 package.

Applications

CDMA/GSM Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Portable Information Appliances

Key Spec.

	RT9178
Status	EOL
Vin (min) (V)	2.5
Vin (max) (V)	6
Vout (min) (V)	2.4
Vout (max) (V)	3.2
Output Adj. Method	Fixed
Accuracy (+/- %)	2
Iout (max) (mA)	200
Iq (typ) (uA)	90
Vdropout @ rated current (typ) (mV)	200 @ 0.2A
Cout Type	Ceramic
Features	Enable Input;Extra Low Noise;High PSRR;Low Dropout;OCP;Stable with Ceramic Capacitor
Package Type	SOT-25

Features

Ultra-Low-Noise for RF Application
Ultra-Fast Response in Line/Load Transient
Quick Start-Up (Typically 100us)
< 0.01uA Quiescent Current When Shutdown
Low Dropout : 200mV at 200mA
Wide Operating Voltage Ranges : 2.5V to 6V
TTL-Logic-Controlled Shutdown Input
Low Temperature Coefficient
Current Limiting Protection
Thermal Shutdown Protection
Only 1uF Output Capacitor Required for Stability
High Power Supply Rejection Ratio
Custom Voltage Available
RoHS Compliant and 100% Lead (Pb)-Free