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  Richtek Technology Electronic Components Datasheet  

RT9046 Datasheet

Low-Dropout Linear Regulator Controller

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RT9046
Low-Dropout Linear Regulator Controller with PGOOD
Indication
General Description
Features
The RT9046 is a low-dropout voltage regulator controller
designed specifically for use with an external N-MOSFET
for various applications. The controller features a 2%
reference, a high current driver capability of driving a high
current/low RDS(ON) N-MOSFET, programmable output
voltage, a power monitor with a 0.6ms delay, internal soft-
start function, under voltage protection, and chip enable
for power conservation. The device is also useful in other
high current applications. The RT9046 is available in a
small footprint package of SOT-23-6.
Ordering Information
RT9046
Package Type
E : SOT-23-6
Note :
Lead Plating System
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.
z Programmable Output Voltage
z High Current Driver for High Current FET
z High Accuracy ±2% Voltage Reference
z Quick Line and Load Transient Response
z Power Good Monitor with Output Delay
z Internal Soft-Start Function to Reduce Inrush Current
z Enable Control and Under Voltage Protection
z Small Footprint Package SOT-23-6
z RoHS Compliant and Halogen Free
Applications
z Large-scale, Telecom Blade Systems
z Large-scale, Mass Storage Blade Systems
z High Current Systems Requiring Sequencing
z High Current Systems Requiring Power Management
Pin Configurations
(TOP VIEW)
VCC DRI PGOOD
654
23
EN GND FB
SOT-23-6
Function Block Diagram
Typical Application Circuit
VCC VIN
Chip Enable
1 EN
VCC 6
2
RT9046
GND
DRI
5
3 FB
PGOOD 4
CCC
RPGOOD
PGOOD
VOUT = 0.5x[(R1+R2)/R2]
CIN
Q1
VOUT
R1
COUT
R2
VCC
PGOOD
GND
Reference 0.5V
Voltage
0.45V
0.6ms
Delay
EN
+
-
Driver
DRI
FB
DS9046-01 April 2011
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9046 Datasheet

Low-Dropout Linear Regulator Controller

No Preview Available !

RT9046
Functional Pin Description
Pin No. Pin Name
Pin Function
1 EN
Chip Enable (Active High).
2 GND
Ground.
3 FB
Output Voltage Feedback.
4 PGOOD Power Good Open Drain Output.
5 DRI
Driver Output.
6 VCC
Power Supply Input.
Test Circuit
Chip Enable
EN
VCC
RT9046
GND
DRI
FB PGOOD
VCC
12V
C1µCFC
RPGOOD
100k
PGOOD
VOUT = 0.5x[(R1+R2)/R2]
VIN
CIN
100µF
Q1
PHD3055
VOUT
R1
1k COUT
100µF
R2
2k
Figure 1. Typical Test Circuit
VCC
12V
Chip Enable
5V
VFB
CFB
EN VCC
GND RT9046 DRI
FB PGOOD
CCC
1µF
A VDRI
VFB = 0.7V for current sink at DRI
VFB = 0.3V for current source at DRI
Figure 2. DRI Source/Sink Current Test Circuit
www.richtek.com
2
DS9046-01 April 2011


Part Number RT9046
Description Low-Dropout Linear Regulator Controller
Maker Richtek
PDF Download

RT9046 Datasheet PDF






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