LDO Regulator. RT9198 Datasheet

RT9198 Regulator. Datasheet pdf. Equivalent


Richtek Technology RT9198
www.DataSheet4U.com
RT9198/A
300mA, Low Noise, Ultra-Fast CMOS LDO Regulator
General Description
The RT9198/A is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9198/A performance is optimized for
battery-powered systems to deliver ultra low noise and
low quiescent current. Regulator ground current increases
only slightly in dropout, further prolonging the battery life.
The RT9198/A also works with low-ESR ceramic
capacitors, reducing the amount of board space necessary
for power applications, critical in hand-held wireless
devices. The RT9198/A 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 SOT-23-3, SOT-23-5,
SC-70-5, SC-82 and WDFN-6L 2x2 packages, the RT9198/
A also offers a range from 1.5V to 5.0V with 0.1V per
step.
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, otherwise visit our website for detail.
DS9198/A-10 November 2006
Features
z Low-Noise for RF Application
z 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
Ordering Information
RT9198/A-
Package Type
U5 : SC-70-5
U5R : SC-70-5 (R-Type)
Y : SC-82
V : SOT-23-3
B : SOT- 23-5
BR : SOT- 23-5 (R-Type)
QW : WDFN-6L 2x2 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
1H : 1.85V
2H : 2.85V
4G : 4.75V
Chip Enable Function (Active Low)
Chip Enable Function (Active High)
Note :
RichTek Pb-free and Green 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.
`100% matte tin (Sn) plating.
www.richtek.com
1


RT9198 Datasheet
Recommendation RT9198 Datasheet
Part RT9198
Description Ultra-Fast CMOS LDO Regulator
Feature RT9198; www.DataSheet4U.com RT9198/A 300mA, Low Noise, Ultra-Fast CMOS LDO Regulator General Description Th.
Manufacture Richtek Technology
Datasheet
Download RT9198 Datasheet




Richtek Technology RT9198
www.DataSheet4U.com
RT9198/A
Pin Configurations
(TOP VIEW)
VIN 1 5 VOUT EN/EN 1 5 VIN
GND 2
NC 2
EN/EN 3 4 NC
GND 3 4 VOUT
SOT-23-5/SC-70-5 (R-Type)
SOT-23-5/SC-70-5
VIN VOUT
43
12
EN/EN GND
SC-82
VIN
3
12
GND
VOUT
SOT-23-3
EN/EN 1
GND 2
VIN 3
6 NC
5 NC
4 VOUT
WDFN-6L 2x2
Note : There is no pin1 indicator on top mark for SC-82 type,
and pin 1 will be lower left pin when reading top mark from
left to right. Pin2 of SC-82 is wider than other pins.
Typical Application Circuit
VIN CIN
1uF
Chip Enable
On
Off
RT9198
VIN VOUT
EN GND
VOUT
COUT
1uF
VIN CIN
1uF
Chip Enable
Off
On
RT9198A
VIN VOUT
EN GND
VOUT
COUT
1uF
www.richtek.com
2
DS9198/A-10 November 2006



Richtek Technology RT9198
www.DataSheet4U.com
RT9198/A
Functional Pin Description
Pin Name
EN
EN
NC
Pin Function
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low
100kΩ resistor connected to GND when the control signal is floating.
Chip Enable (Active Low). Note that this pin is high impedance. There should be a pull high
100kΩ resistor connected to VIN when the control signal is floating.
No Internal Connect.
GND, Exposed Pad Ground. Exposed pad should be soldered to PCB board and connected to GND.
VOUT
Output Voltage.
VIN Input Voltage.
Function Block Diagram
EN/EN
VREF
Shutdown
and
Logic Control
+
Error
Amplifier
MOS Driver
Current-Limit
and
Thermal
Protection
VIN
VOUT
GND
DS9198/A-10 November 2006
www.richtek.com
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