RT9193
300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator
General Description Features
zz z zz Ultra Low Noise for RF Application
The RT9193 is designed for portable RF and wireless
zz z zz Ultra Fast Response in Line/Load Transient
applications with demanding performance and space
zz z zz Quick Start-Up (Typically 50s)
requirements. The RT9193 performance is optimized for
zz z zz <0.01A Standby Current When Shutdown
battery-powered systems to deliver ultra low noise and
zz z zz Low Dropout : 220mV @ 300mA
low quiescent current. A noise bypass pin is available for
zz z zz Wide Operating Voltage Ranges : 2.5V to 5.5V
further reduction of output noise. Regulator ground current
zz z zz TTL-Logic-Controlled Shutdown Input
increases only slightly in dropout, further prolonging the
zz z zz Low Temperature Coefficient
battery life. The RT9193 also works with low-ESR ceramic
zz z zz Current Limiting Protection
capacitors, reducing the amount of board space necessary
zz z zz Thermal Shutdown Protection
for power applications, critical in hand-held wireless
zz z zz Only 1F Output Capacitor Required for Stability
devices. The RT9193 consumes less than 0.01A in
zz z zz High Power Supply Rejection Ratio
shutdown mode and has fast turn-on time less than 50s.
zz z zz Custom Voltage Available
The other features include ultra low dropout voltage, high
zz z zz RoHS Compliant and 100% Lead (Pb)-Free
output accuracy, current limiting protection, and high ripple
rejection ratio. Available in the SC-70-5, SOT-23-5,
Applications
TSOT-23-5, WDFN-6L 2x2 and MSOP-8 packages.
z CDMA/GSM Cellular Handsets
z Battery-Powered Equipment
Ordering Information
z Laptop, Palmtops, Notebook Computers
RT9193-
Package Type
z Hand-Held Instruments
U5 : SC-70-5
z PCMCIA Cards
B : SOT-23-5
z Portable Information Appliances
J5 : TSOT-23-5
QW : WDFN-6L 2x2 (W-Type)
F : MSOP-8
Marking Information
Lead Plating System
For marking information, contact our sales representative
P : Pb Free
directly or through a Richtek distributor located in your
G : Green (Halogen Free and Pb Free)
area.
Output Voltage
15 : 1.5V
16 : 1.6V
Typical Application Circuit
:
49 : 4.9V
50 : 5.0V RT9193
1H : 1.85V
V
VIN VOUT V
IN OUT
2H : 2.85V
C
C
IN OUT
4G : 4.75V 1F/X7R
1F/X7R
GND
(1.5V to 5V with 0.1V step is available)
Chip Enable
Note : BP
EN
C
BP
Richtek products are :
22nF
` RoHS compliant and compatible with the current require-
(Option for low noise)
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
DS9193-16 January 2013 www.richtek.com
1-
RT9193
Pin Configurations
(TOP VIEW)
VOUT BP
NC 8 NC
EN 1 6 BP
5 4
VIN 2 7
EN
GND 2 5 NC
3
NC 6 BP
7
23 VIN 3 4 VOUT
VOUT 4
5 GND
VIN GND EN
WDFN-6L 2x2 MSOP-8
SC-70-5/SOT-23-5/TSOT-23-5
Functional Pin Description
Pin Name Pin Function
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100k
EN
resistor connected to GND when the control signal is floating.
Reference Noise Bypass. This pin can be floating. For lowest noise performance, connect a 22nF
BP
capacitor between the BP and GND pins.
GND Ground.
VOUT Output Voltage.
VIN Power Input Voltage.
Function Block Diagram
EN
Shutdown
VIN
Quick and
Start
Logic Control
BP V
REF
+ MOSFET
Driver
Error
VOUT
Amplifier
Current-Limit
and
Thermal
Protection
GND
Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
www.richtek.com DS9193-16 January 2013
2