RT9828 RICHTEK [Richtek Technology Corporation], RT9828 Datasheet

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RT9828

Manufacturer Part Number
RT9828
Description
Dual Micro-Power Voltage Detectors
Manufacturer
RICHTEK [Richtek Technology Corporation]
Datasheet
Dual Micro-Power Voltage Detectors
General Description
The RT9828 is a micro-power voltage detector supervising
the power supply voltage level for microprocessors (uP) or
digital systems. It provides internally fixed threshold levels
ranging from 1.2V to 5V, which covers most digital
applications. It features low supply current of 6uA. The
RT9828 performs supervisory function by sending out a
reset signal whenever the V
threshold level. This reset signal will last the whole period
before V
level, the reset signal will be released after a
time. The RT9828 is available in SOT-23-6 package.
Ordering Information
Note :
Richtek products are :
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9828-02 April 2011
RT9828
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
ments of IPC/JEDEC J-STD-020.
DD
-
recovering. Once the V
Package Type
E : SOT-23-6
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Threshold Voltage : RESET1/RESET2
WP : 1.6V/3.0V
GP : 1.8V/3.0V
DD
voltage falls below a preset
DD
exceeds the threshold
certain delay
Features
Applications
Pin Configurations
High Accuracy ± ± ± ± ± 1.5%
Low Supply Current 6uA
Quick Reset within 20us
Built-in 55ms Recovery Delay
Low Functional Supply Voltage 0.9V
Dual N-Channel Open-Drain Output
Small SOT-23-6 Packages
RoHS Compliant and 100% Lead (Pb)-Free
Computers
Controllers
Intelligent Instruments
Critical uP and uC Power Monitoring
Portable/Battery-Powered Equipment
RESET1
VDD1 NC
(TOP VIEW)
6
SOT-23-6
GND VDD2
5
2
RESET2
4
3
RT9828
www.richtek.com
1

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RT9828 Summary of contents

Page 1

... Dual Micro-Power Voltage Detectors General Description The RT9828 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (uP) or digital systems. It provides internally fixed threshold levels ranging from 1.2V to 5V, which covers most digital applications. It features low supply current of 6uA. The ...

Page 2

... Active Low Open-Drain Reset Pin of Detector1. Function Block Diagram VDD1 VDD2 Available Voltage Version Code Voltage 1.2 1.3 1 Code Voltage 2.65 2.7 2.8 www.richtek.com 2 100k RT9828 VDD1 RESET1 DD1 5 GND VDD2 RESET2 DD2 100k Pin Function Timer CMP VSET1 Threshold Voltage Setting POR Power On Reset ...

Page 3

... TH V HYS = 25° low effective single layer thermal conductivity test board A Min Typ 0 −1 > 3.5mA -- -- SINK -- 0.01V RT9828 − 0. − 0. 0.3V DD − 65°C to 150°C − 40°C to 125°C − 40°C to 85°C Max Units +1 ...

Page 4

... RT9828 Typical Operating Characteristics Nch Driver Sink Current vs. Input Voltage 3V 0. 0.5 1 1.5 Input Voltage (V) VDD1 Supply Current vs. Input Voltage 1. Input Voltage (V) Output Voltage vs. Input Voltage 1. ...

Page 5

... DROP 50 75 100 125 (°C) Power-Up Reset Time-Out vs. Temperature 100 1. -50 - Temperature 200mV DROP -50 - Temperature RT9828 75 100 125 (° 150mV DROP V = 250mV DROP 75 100 125 (°C) www.richtek.com 5 ...

Page 6

... HYS V TH Minimum operation voltage is the maximum A = 25°C can be calculated A = (125°C − 25°C) / (250°C/W) = 0.400W for D(MAX) J(MAX) . For RT9828 packages, the Figure 2 of derating curves 0.50 0.45 0.40 0.35 SOT-23-6 0.30 0.25 0.20 0.15 0.10 0.05 0. Ambient Temperature (° ...

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 RT9828 H L Dimensions In Inches Min Max 0.031 0.051 0.000 0.006 0.055 0.071 ...

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