RT9187A Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – 300mA, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator

RT9187A
300mA, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator
General Description
The RT9187A is a high-performance, 300mA 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
RT9187A also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices.
The RT9187A consumes less than 0.1μA in shutdown mode
and has fast turn-on time less than 100μs. 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 and VDFN-6L
2x2 package.
Ordering Information
RT9187A -
Package Type
B: SOT-23-5
QV : VDFN-6L 2x2 (V-Type)
Lead Plating System
P : Pb Free
Note :
Fixed Output Voltage Code
27 : 2.7V
28 : 2.8V
2G : 2.75V
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Features
z Ultra-Low-Noise for RF Application
z Ultra-Fast Response in Line/Load Transient
z Quick Start-Up (Typically 40μs)
z <0.1μA Standby Current When Shutdown
z Low Dropout : 75mV @ 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 RoHS Compliant and 100% Lead (Pb)-Free
Applications
z CDMA/GSM Cellular Handsets
z Portable Information Appliances
z Battery-Powered Equipment
z Laptop, Palmtops, Notebook Computers
z Hand-Held Instruments
z Mini PCI & PCI-Express Cards
z PCMCIA & New Cards
Pin Configurations
(TOP VIEW)
VOUT
BP
5
4
2
3
VIN GND EN
SOT-23-5
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
EN 1
GND 2
VIN 3
6 BP
5 VOUT
7 _{4 VOUT}
VDFN-6L 2x2
DS9187A-01 April 2011
www.richtek.com
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