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RT9188 Datasheet

  • RT9188

  • Fast Transient Response

  • 12頁(yè)

  • ETC

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Preliminary
RT9188
Dual, Ultra-Low Quiescent, 100mA CMOS LDO Regulator
General Description
The RT9188 series are an efficient, precise dual-
channel CMOS LDO regulator optimized for ultra-
low-quiescent applications. Both regulator outputs
are capable of sourcing 100mA of output current.
The RT9188鈥檚 performance is optimized for battery-
powered systems to deliver extremely low dropout
voltage and ultra-low quiescent current. Regulator
ground current increases only slightly in dropout,
further prolonging the battery life. The RT9188 also
works with low-ESR ceramic capacitors, reducing the
amount of board space necessary for power
applications, critical in hand-held wireless devices.
Key features include current limit, thermal shutdown,
faster transient response, ultra-low quiescent current
(typically 8碌A(chǔ)), low dropout voltage, high output
accuracy, current limiting protection, and high ripple
rejection ratio. Available in the 5-lead SOT-25
package, the RT9188 also offers a range of 1.2V to
5V with 0.1V per step.
Features
Ultra-Low Quiescent Current (Typically 8碌A(chǔ))
Low Dropout: 450mV at 100mA
Wide Operating Voltage Ranges: 2V~6V
Faster Transient Response
Tight Load and Line Regulation
Current Limiting Protection
Thermal Shutdown Protection
Only 1碌F Output Capacitor Required for Stability
High Power Supply Rejection Ratio
Custom Voltages Available
Applications
Cellular Phones and Pages
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Card
Wireless LAN Card/Keyboard/Mouse
Pin Configurations
Part Number
RT9188-
CB
(Plastic SOT-25)
5
Ordering Information
RT9188-
Package Type
B : SOT-25
Operating Temperature Range
C: Commercial Standard
Output Voltage 1
K : 3.0V
Output Voltage 2
8 : 1.8V
Pin Configurations
TOP VIEW
4
1
2
3
VOUT1
VDD
NC
VOUT2
5.
GND
1.
2.
3.
4.
Other voltage versions please
contact RichTek for detail.
Typical Application Circuit
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.
V
IN
C
IN
1碌 F
VDD
VOUT1
V
OUT1
C
OUT1
1碌 F
RT9188
VOUT2
GND
V
OUT2
C
OUT2
1碌 F
DS9188-00 November 2002
www.richtek.com
1

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