RT9193 

Richtek

300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator

General Description

The RT9193 is designed for portable RF and wireless

applications with demanding performance and space

requirements. The RT9193 performance is optimized for

battery-powered systems to deliver ultra low noise and

low quiescent current. A noise bypass pin is available for

further reduction of output noise. Regulator ground current

increases only slightly in dropout, further prolonging the

battery life. The RT9193 also works with low-ESR ceramic

capacitors, reducing the amount of board space necessary

for power applications, critical in hand-held wireless

devices. The RT9193 consumes less than 0.01μA in

shutdown mode and has fast turn-on time less than 50μs.

The other features include ultra low dropout voltage, high

output accuracy, current limiting protection, and high ripple

rejection ratio. Available in the SC-70-5, SOT-23-5,

TSOT-23-5, WDFN-6L 2x2 and MSOP-8 packages.

Features

z Ultra Low Noise for RF Application

z Ultra Fast Response in Line/Load Transient

z Quick Start-Up (Typically 50μs)

z <0.01μA Standby Current When Shutdown

z Low Dropout : 220mV @ 300mA

z Wide Operating Voltage Ranges : 2.5V to 5.5V

z TTL-Logic-Controlled Shutdown Input

z Low Temperature Coefficient

z Current Limiting Protection

z Thermal Shutdown Protection

z Only 1μF Output Capacitor Required for Stability

z High Power Supply Rejection Ratio

z Custom Voltage Available

z RoHS Compliant and 100% Lead (Pb)-Free

Applications

z CDMA/GSM Cellular Handsets

z Battery-Powered Equipment

z Laptop, Palmtops, Notebook Computers

z Hand-Held Instruments

z PCMCIA Cards

z Portable Information Appliances

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area

Absolute Maximum Ratings (Note 1)

z Supply Input Voltage------------------------------------------------------------------------------------------------------ 6V

z Power Dissipation, PD @ TA = 25°C

SC-70-5 ---------------------------------------------------------------------------------------------------------------------- 300mW

TSOT-23-5/SOT-23-5------------------------------------------------------------------------------------------------------ 400mW

WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------- 606mW

MSOP-8 --------------------------------------------------------------------------------------------------------------------- 625mW

z Package Thermal Resistance (Note 2)

SOT-70-5, θJA --------------------------------------------------------------------------------------------------------------- 333°C/W

TSOT-23-5/SOT-23-5, θJA ------------------------------------------------------------------------------------------------ 250°C/W

TSOT-23-5/SOT-23-5, θJC ----------------------------------------------------------------------------------------------- 25°C/W

WDFN-6L 2x2, θJA --------------------------------------------------------------------------------------------------------- 165°C/W

WDFN-6L 2x2, θJC -------------------------------------------------------------------------------------------------------- 20°C/W

MSOP-8 θJA ---------------------------------------------------------------------------------------------------------------- 160°C/W

MSOP-8 θJC ---------------------------------------------------------------------------------------------------------------- 55°C/W

z Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C

z Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C

z Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C

z ESD Susceptibility (Note 3)

HBM (Human Body Model)---------------------------------------------------------------------------------------------- 2kV

MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions (Note 4)

z Supply Input Voltage------------------------------------------------------------------------------------------------------ 2.5V to 5.5V

z EN Input Voltage ----------------------------------------------------------------------------------------------------------- 0V to 5.5V

z Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C

z Ambient Temperature Range-------------------------------------------------------------------------------------------- −40°C to 85°℃