General Description
The RT9187 is a high-performance, 1A LDO regulator, offering extremely high PSRR and ultra-low dropout. Ideal for portable RF and wireless applications with demanding performance and space requirements.
A noise reduction pin is also available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The RT9187 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices.
The RT9187 consumes less than 0.1uA in shutdown mode and has fast turn-on time less than 40μs. The other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the VDFN-8L 3x3 and SOP-8 (Exposed Pad) package.

*Ultra-Low-Noise for RF Application
*Ultra-Fast Response in Line/Load Transient
*Quick Start-Up (Typically 40μs)
*< 0.1uA Standby Current When Shutdown
*Low Dropout : 240mV at 1A
*Wide Operating Voltage Ranges : 2.5V to 5.5V
*TTL-Logic-Controlled Shutdown Input
*Current Limiting Protection
*Thermal Shutdown Protection
*Only 2.2uF Output Capacitor Required for Stability
*High Power Supply Rejection Ratio
*RoHS Compliant and 100% Lead (Pb)-Free

*CDMA/GSM Cellular Handsets
*Battery-Powered Equipment
*Laptop, Palmtops, Notebook Computers
*Hand-Held Instruments
*Mini PCI & PCI-Express Cards
*PCMCIA & New Cards
*Portable Information Appliances

RT9187-10PQV, RT9187-11PQV, RT9187-32PQV, RT9187-33PQV

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