RT9823 RICHTEK [Richtek Technology Corporation], RT9823 Datasheet

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RT9823

Manufacturer Part Number
RT9823
Description
Smart Multi-Voltage Detector
Manufacturer
RICHTEK [Richtek Technology Corporation]
Datasheet
Smart Multi-Voltage Detector
General Description
The RT9823 is an integrated smart multi voltage detector
supervising two power supply voltage levels including 5V,
and another voltage (such as 3.3V or 12V) , which can be
set via an external resistive voltage divider.
The RT9823 performs supervisory function by sending out
a CTR signal whenever the monitored voltages fall below
80% of the voltage levels. The CTR signal will last the
whole period before VCC recovers. Once the supervising
voltages are recovered to higher than 80% of the voltage
levels, the CTR signal will be released after a 300ms delay
time.
MR (Manual Reset) controls the CTR signal when the
two monitored power supply voltages are at normal voltage
levels. When the MR signal is in logic high, the CTR signal
will be pulled low immediately.
The RT9823 is available in a SOT-23-6 package.
Ordering Information
Note :
Richtek products are :
Marking Information
DS9823-02 June 2011
RT9823
ments of IPC/JEDEC J-STD-020.
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
ES=DNN
Package Type
E : SOT-23-6
Lead Plating System
G : Green (Halogen Free and Pb Free)
ES= : Product Code
DNN : Date Code
Features
Applications
Pin Configurations
Capable of Monitoring Two Inputs Precisely
VCC Connect to 5V or 3.3V Standby Power
Detection Threshold Voltages
Accuracy : ± ± ± ± ± 2%
CTR (Open Drain Output Active Low)
Built-in Recovery Delay 300ms
Manual CTR (MR) Function
SOT-23-6 Package
RoHS Compliant and Halogen Free
LCD TV or Monitors
Consumer Electronic Products
System Voltage Detector
VADJ : 1V (Using Resistor Divider)
V5 : 5V x 80%
(TOP VIEW)
6
SOT-23-6
5
2
4
3
RT9823
www.richtek.com
1

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RT9823 Summary of contents

Page 1

... Smart Multi-Voltage Detector General Description The RT9823 is an integrated smart multi voltage detector supervising two power supply voltage levels including 5V, and another voltage (such as 3.3V or 12V) , which can be set via an external resistive voltage divider. The RT9823 performs supervisory function by sending out a CTR signal whenever the monitored voltages fall below 80% of the voltage levels ...

Page 2

... The Voltage Detection Input. The detection threshold 80%. 6 VCC Supply Input. Connect this pin to standby power from system. Function Block Diagram VCC V REF VADJ V5 www.richtek.com 2 RT9823 6 VCC R1 4 12V VADJ logic-high threshold voltage is 1V. ADJ ...

Page 3

... DS9823-02 June 2011 (Note 1) (Note 4) Symbol Test Conditions I Without load VCC POR V POR_Hys V V5_TH V VADJ_TH DELAY DEGLITCH V = 3.3V, 5mA sinking current CC V OL_CTR at CTR output = 25° low-effective thermal conductivity test board of JEDEC 51-3 A RT9823 Min Typ Max -- -- 200 2.97 5 5. 0.15 -- 3.92 4 4.08 0. 0.8 200 300 -- ...

Page 4

... RT9823 Typical Operating Characteristics V5 Detector Delay Time vs. Temperature 450 425 400 375 350 325 300 275 250 -50 - Temperature (°C) VADJ Detector Delay Time vs. Temperature 450 425 400 375 350 325 300 275 250 -50 - Temperature (°C) V5 Pin Response ...

Page 5

... MR Pin Response MR (5V/Div) CTR (5V/Div) Time (5ms/Div) DS9823-02 June 2011 Supply Current vs. Temperature 250 225 200 175 150 125 100 -50 -25 RT9823 3. 100 125 Temperature (°C) www.richtek.com 5 ...

Page 6

... In conventional reset IC application, to monitor one power rail needs one reset IC. The RT9823 can monitor two power rails simultaneously, by using just one reset IC. The RT9823 also provides a Manual reset (MR) function for easy application ...

Page 7

... SOT-23-6 Surface Mount Package Richtek Technology Corporation Taipei Office (Marketing) 5F, No. 95, Minchiuan Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)86672399 Fax: (8862)86672377 Email: marketing@richtek.com RT9823 H L Dimensions In Inches Min Max 0.031 0.051 0.000 0.006 0.055 0.071 ...

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