RT9046 Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – Low-Dropout Linear Regulator Controller with PGOOD

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 R_DS(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
6
5
4
2
3
EN GND FB
SOT-23-6
Function Block Diagram
Typical Application Circuit
V_CC V_IN
Chip Enable
1 _EN
VCC ⁶
RT9046
2 _GND
DRI ⁵
C_CC
C_IN
Q1
3 _FB
PGOOD ₄ RPGOOD
V_OUT
PGOOD
V_OUT = 0.5x[(R1+R2)/R2]
R1
C_OUT
R2
VCC
PGOOD
GND
Reference _0.5V
Voltage
0.45V
0.6ms
Delay
EN
+
DRI
-
Driver
FB
DS9046-01 April 2011
www.richtek.com
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