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  Richtek Technology Electronic Components Datasheet  

RT9008 Datasheet

Low Dropout Linear Regulator Controller

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RT9008
Low Dropout Linear Regulator Controller with Soft-Start
General Description
The RT9008 is a wide input range, low dropout voltage
regulator controller with soft-start function. The part drives
an external N-MOSFET and can operate with VCC power
range from 4.5V to 13.5V. With this flexible topology and
wide input voltage range, the RT9008 is suitable for various
applications. The soft-start function can reduce the input
inrush current by adjusting the external capacitor. The
RT9008 uses the small footprint package of the SOT-23-6.
Features
z Programmable Output Voltage
z High Current Driver for High Current FET
z Adjustable Soft Start Time
z High Accuracy ±2% Reference Voltage
z Quick Line and Load Transient Response
z Enable Control
z Small Footprint Package SOT-23-6
z RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9008
Package Type
E : SOT-23-6
Note :
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
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.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Applications
z Desktop/Notebook PC
z DSC
z Processor Power Sequencing
Pin Configurations
(TOP VIEW)
VCC DRI SS
654
23
EN GND FB
SOT-23-6
Typical Application Circuit
VCC
VIN
RT9008
6 VCC
SS 4
CCC
DRI 5
Chip Enable
1 EN
2 GND
FB 3
CSS
VOUT = VREF x ( R1 + R2 )
R2
Q1
R1
R2
CIN
VOUT
COUT
DS9008-01 April 2011
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9008 Datasheet

Low Dropout Linear Regulator Controller

No Preview Available !

RT9008
Test Circuit
VCC
RT9008 SS 4
6 VCC
CCC
1µF/X7R
DRI 5
Chip Enable
1 EN
2 GND
FB 3
VIN
CSS
100pF/
Ceramic
Q1
PHD3055
R1
1k
R2
2k
CIN
100µF/EC
VOUT
COUT
100µF/EC
Figure 1. Typical Test Circuit
VCC
12V
CCC
1µF
RT9008
6 VCC
SS 4
DRI 5
Chip Enable
5V
1 EN
2 GND
FB 3
A VDRI
CFB
VFB
Figure 2. DRI Source/Sink Current Test Circuit
Functional Pin Description
Pin No. Pin Name
Pin Function
1 EN
Enable Input Pin. (Active High)
2 GND
G roun d.
3 FB
Output Voltage Feedback Reference Input.
4 SS
Soft Start Control.
5 DRI
Driver Output.
6 VCC
Power Supply Input.
Function Block Diagram
EN
SS
GND
Shutdown
Logic
0.8V
Reference
VCC
+ DRI
-
FB
www.richtek.com
2
DS9008-01 April 2011


Part Number RT9008
Description Low Dropout Linear Regulator Controller
Maker Richtek Technology
PDF Download

RT9008 Datasheet PDF






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