RT9818B-13PQW [RICHTEK]
Micro-Power Voltage Detectors;
| 型号： | RT9818B-13PQW |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | Micro-Power Voltage Detectors |
| 文件： | 总14页 (文件大小：193K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
RT9818
Micro-Power Voltage Detectors
General Description
Features
Internally Fixed Threshold 1.2V to 5V in 0.1V Step
The RT9818 is a micro-power voltage detector supervising
the power supply voltage level for microprocessors (μP)
or digital systems. It provides internally fixed threshold
levels with 0.1V per step ranging from 1.2V to 5V, which
covers most digital applications. It features low supply
current of 3μA. The RT9818 performs supervisory function
by sending out a reset signal whenever the VDD voltage
falls below a preset threshold level. This reset signal will
last the whole period before VDD recovering. Once VDD
recovered upcrossing the threshold level, the reset signal
will be released after a certain delay time. RT9818 is
provided in SC-82, SC-70-3, SOT-23-3, SOT-23-5 and
SOT-89 packages.
High Accuracy 1.5%
Low Supply Current 3μA
No External Components Required
Quick Reset within 20μs
Built-In Recovery Delay Include 0ms, 55ms, 220ms,
450ms Options
Low Functional Supply Voltage 0.9V
N-Channel Open-Drain Output
Small SC-82, SC-70-3, SOT-23-3, SOT-23-5, SOT-89
Packages
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Ordering Information
Computers
-
RT9818
Controllers
Package Type
U3 : SC-70-3
V : SOT-23-3
VL : SOT-23-3 (L-Type)
B : SOT-23-5
Intelligent Instruments
Critical μP and μC Power Monitoring
Portable/Battery-Powered Equipment
X : SOT-89
Marking Information
Y : SC-82
YR : SC-82 (R-Type)
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Threshold Voltage
12 : 1.2V
13 : 1.3V
:
Typical Application Circuit
49 : 4.9V
50 : 5.0V
Reset Active Timeout Period
A = 0ms (RESET)
RT9818
GND
100k
Pull Up
B = 55ms (RESET)
C = 220ms (RESET)
D = 450ms (RESET)
E = 0ms (RESET)
F = 55ms (RESET)
G = 220ms (RESET)
H = 450ms (RESET)
VDD
VDD
P
RESET/
RESET
RESET/
RESET
Note :
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.
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9818-11 August 2016
www.richtek.com
1
RT9818
Pin Configuration
(TOP VIEW)
VDD
GND
NC
RESET/
NC
RESET
3
4
3
4
3
2
2
2
VDD
RESET/
RESET
GND
RESET/
RESET
VDD
GND
SC-82
SC-82 (R-Type)
SC-70-3
NC
NC
VDD
VDD
5
4
3
3
1
2
3
2
3
2
2
VDD GND
GND
GND
RESET/
RESET
RESET/
RESET
RESET/
RESET
VDD GND
RESET/
RESET
SOT-23-3
SOT-23-3 (L-Type)
SOT-23-5
SOT-89
Functional Pin Description
Pin Name
GND
Pin Function
Ground.
RESET
RESET
VDD
Active low open-drain reset output.
Active high open-drain reset output.
Power pin.
Functional Block Diagram
VDD
RESET/
RESET
Timer
CMP
N MOS
VSET
GND
Threshold
Voltage Setting
POR
Power On Reset
Timing Diagram
VDD
VTH
0V
V
RESET
Delay Time (0, 55, 220, 450ms)
0V
V
RESET
Delay Time (0, 55, 220, 450ms)
0V
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS9818-11 August 2016
RT9818
Absolute Maximum Ratings (Note 1)
Terminal Voltage (with Respect to GND)
VDD ----------------------------------------------------------------------------------------------------------------------------- −0.3V to 6V
All Other Inputs ------------------------------------------------------------------------------------------------------------- −0.3V to 6V
Input Current, IVDD ---------------------------------------------------------------------------------------------------------- 20mA
Power Dissipation, PD @ TA = 25°C
SC-70 / SC-82--------------------------------------------------------------------------------------------------------------- 0.25W
SOT-23-3 --------------------------------------------------------------------------------------------------------------------- 0.4W
SOT-23-5 --------------------------------------------------------------------------------------------------------------------- 0.4W
SOT-89 ------------------------------------------------------------------------------------------------------------------------ 0.55W
Package Thermal Resistance (Note 2)
SC-70 / SC-82, θJA --------------------------------------------------------------------------------------------------------- 400°C/W
SOT-23-3, θJA ---------------------------------------------------------------------------------------------------------------- 250°C/W
SOT-23-5, θJA ---------------------------------------------------------------------------------------------------------------- 250°C/W
SOT-89, θJA ------------------------------------------------------------------------------------------------------------------ 180°C/W
Lead Temperature (Soldering, 10sec.)--------------------------------------------------------------------------------- 260°C
Storage Temperature Range --------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model)----------------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Junction Temperature Range--------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range--------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VDD = 3V, unless otherwise specified)
Parameter
Operating VDD (VOUT) Range
Supply Current
Symbol
VDD
Test Conditions
Min
0.9
--
Typ
Max
6
Unit
V
--
3
IDD
VTH = 3V, VDD = 4.5V, TA = 27C
TA = 27C
8
A
V
Reset Threshold
VTH
--
1.2 to 5
--
--
Threshold Voltage Accuracy
VDD Drop to Reset Delay
RT9818A/E
VTH
tRD
TA = 27C
1.5
--
1.5
--
%
Drop = VTH 125mV
20
s
--
0
--
RT9818B/F
RT9818C/G
RT9818D/H
35
55
75
297
608
Reset Active
Time Out Period
tRP
VDD 1.02 x VTH
ms
143
292
220
450
RESET Output Voltage Low
(Note 5)
VOL
3 = VDD < VTH SINK
I
> 3.5mA
--
--
--
0.4
V
V
Hysteresis Width
VHYS
0.01VTH 0.016VTH
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9818-11 August 2016
www.richtek.com
3
RT9818
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a low effective thermal conductivity single-layer test board per JEDEC 51-3.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. The voltage VOL can be calculated by VOL = VDD − Ir * R. Where R is the pull-up resistor and Ir is the current flowing
through the pull-up resistor. For typical application (R=100kΩ), VOL is less than 0.2V.
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS9818-11 August 2016
RT9818
Typical Operating Characteristics
Nch Driver Output Current vs. VDS
Nch Driver Output Current vs. VDS
60
50
40
30
20
10
0
2.4
RT9818C-30
RT9818A-12
VDD = 2.8V
VDD = 1.1V
2.0
VDD = 2.5V
1.6
1.2
VDD = 2V
VDD = 1V
0.8
VDD = 1.5V
0.4
0.0
0
0
0
0.5
1
1.5
2
2.5
3
3.5
0
0.3
0.6
0.9
1.2
1.5
VDS (V)
VDS (V)
Nch Driver Output Current vs. VDS
Output Voltage vs. Input Voltage
120
100
80
60
40
20
0
7
6
5
4
3
2
1
0
RT9818
RT9818A-45
VDD = 4.4V
= 4V
= 3.5V
= 3V
= 2.5V
= 2V
4.5V
1.2V
= 1.5V
0
1
2
3
4
5
1
2
3
4
5
6
VDS (V)
Input Voltage (V)
Supply Current vs. Input Voltage
Supply Current vs. Input Voltage
6
5
4
3
2
1
0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
RT9818C-30
RT9818A-12
80°C
25°C
80°C
25°C
−30°C
−30°C
0
1
2
3
4
5
6
1
2
3
4
5
6
Input Voltage (V)
Input Voltage (V)
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9818-11 August 2016
www.richtek.com
5
RT9818
Power Down Reset Delay vs. Temperature
Supply Current vs. Input Voltage
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
14
12
10
8
RT9818A-12
RT9818A-45
80°C
25°C
VDROP = 200mV
VDROP = 150mV
-30°C
6
VDROP = 250mV
4
2
0
0
1
2
3
4
5
6
-50
-25
0
25
50
75
100
125
Input Voltage (V)
Temperature (°C)
Power Down Reset Delay vs. Temperature
Power Down Reset Delay vs. Temperature
45
40
35
30
25
20
15
10
5
45
40
35
30
25
20
15
10
5
RT9818A-45
RT9818C-30
VDROP = 200mV
VDROP = 150mV
VDROP = 200mV
VDROP = 150mV
VDROP = 250mV
VDROP = 250mV
0
0
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Reset Threshold Deviation vs. Temperature
Nch Driver Sink Current vs. Input Voltage
6
40
RT9818
RT9818C-30, VDS = 0.5V
5V
35
30
25
20
15
10
5
−30°C
80°C
5
4
3
2
1
4.5V
25°C
4.2V
2.2V
1.2V
75
0
-50
-25
0
25
50
100
125
0
0.5
1
1.5
2
2.5
3
3.5
Input Voltage (V)
Temperature (°C)
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS9818-11 August 2016
RT9818
Nch Driver Sink Current vs. Input Voltage
Power Up Reset Time-Out vs. Temperature
50
40
30
20
10
0
500
RT9818A-45, VDS = 0.5V
RT9818C
−30°C
400
300
200
100
0
25°C
VTH = 2.9V
80°C
VTH = 3V
-50
-25
0
25
50
75
100
125
0
1
2
3
4
5
Temperature (°C)
Input Voltage (V)
Power Up Reset Time-Out vs. Temperature
Output Delay Time vs. Load Capacitance
100
1000
100
10
RT9818
RT9818A
80
60
40
20
0
VTH = 5V
VTH = 1.2V
1
VTH = 4.5V
0.1
VTH = 4.5V
0.0010
0.01
0.0001
0.0100
0.1000
1.0000
-50
-25
0
25
50
75
100
125
Load Capacitance (µF)
Temperature (°C)
Nch Driver Output Current vs. Input Voltage
Nch Driver Output Current vs. VDS
60
160
140
120
100
80
RT9818G-31
RT9818G-31
VDS = 0.5V
−30°C
25°C
50
40
30
20
10
0
VDD = 6V
= 5.5V
= 5V
80°C
= 4.5V
= 4V
= 3.5V
60
40
20
0
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage (V)
VDS (V)
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9818-11 August 2016
www.richtek.com
7
RT9818
Power Down Reset Time-Out vs. Temperature
Output Voltage vs. Input Voltage
500
400
300
200
100
0
7
6
5
4
3
2
1
0
RT9818G-31
RT9818G-31
-50
-25
0
25
50
75
100
125
0
1
2
3
4
5
6
Input Voltage (V)
Temperature (°C)
Power Down Reset Time-Out vs. Temperature
Threshold Voltage vs. Temperature
30
4.40
RT9818G-31
RT9818A-42
4.35
4.30
4.25
4.20
4.15
4.10
4.05
4.00
25
20
Rising
Falling
VDROP = 200mV
VDROP = 150mV
15
10
VDROP = 250mV
5
0
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature ( C)
Threshold Voltage vs. Temperature
2.40
2.35
2.30
2.25
2.20
2.15
2.10
2.05
2.00
RT9818C-22
Rising
Falling
-50
-25
0
25
50
75
100
125
Temperature ( C)
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS9818-11 August 2016
RT9818
Application Information
Multiple Supplies
Mainly, the pull-up connected to the RT9818 will connect
to the supply voltage that is being monitored at the IC's
VDD pin. However, some systems may use the open-
drain output to level-shift from the monitored supply to
reset circuitry powered by some other supply.
Benefits of Highly Accurate Reset Threshold
Most μP supervisor ICs have reset threshold voltages
between 1% and 1.5% below the value of nominal supply
voltages. This ensures a reset will not occur within 1% of
the nominal supply, but will occur when the supply is 1.5%
below nominal.
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9818-11 August 2016
www.richtek.com
9
RT9818
Outline Dimension
H
D
L
C
B
e
b
A
A1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.800
0.000
1.150
0.150
1.800
1.800
1.100
0.100
1.350
0.400
2.450
2.250
0.031
0.000
0.045
0.006
0.071
0.071
0.044
0.004
0.054
0.016
0.096
0.089
b
C
D
e
1.300
0.051
H
L
0.080
0.210
0.260
0.460
0.003
0.008
0.010
0.018
SC-70-3 Surface Mount Package
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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DS9818-11 August 2016
RT9818
D
e
H
L
B
C
A
b1
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.800
0.000
1.150
0.150
0.350
1.800
1.800
1.100
0.100
1.350
0.400
0.500
2.450
2.200
0.031
0.000
0.045
0.006
0.014
0.071
0.071
0.043
0.004
0.053
0.016
0.020
0.096
0.087
b
b1
C
D
e
1.300
0.051
H
L
0.080
0.200
0.260
0.460
0.003
0.008
0.010
0.018
SC-82 Surface Mount Package
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9818-11 August 2016
www.richtek.com
11
RT9818
H
D
L
C
B
e
b
A
A1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.889
0.000
1.397
0.356
2.591
2.692
1.803
0.080
0.300
1.295
0.152
1.803
0.508
2.997
3.099
2.007
0.254
0.610
0.035
0.000
0.055
0.014
0.102
0.106
0.071
0.003
0.012
0.051
0.006
0.071
0.020
0.118
0.122
0.079
0.010
0.024
b
C
D
e
H
L
SOT-23-3 Surface Mount Package
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
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12
DS9818-11 August 2016
RT9818
H
D
L
B
C
A
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
1.295
0.152
1.803
0.559
2.997
3.099
1.041
0.254
0.610
Min
Max
A
A1
B
0.889
0.000
1.397
0.356
2.591
2.692
0.838
0.080
0.300
0.035
0.000
0.055
0.014
0.102
0.106
0.033
0.003
0.012
0.051
0.006
0.071
0.022
0.118
0.122
0.041
0.010
0.024
b
C
D
e
H
L
SOT-23-5 Surface Mount Package
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9818-11 August 2016
www.richtek.com
13
RT9818
D
D1
A
B
C
C1
e
e
H
A
b
b
b1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
b
1.397
0.356
2.388
0.406
3.937
0.787
4.394
1.397
1.448
0.356
1.600
0.483
2.591
0.533
4.242
1.194
4.597
1.753
1.549
0.432
0.055
0.014
0.094
0.016
0.155
0.031
0.173
0.055
0.057
0.014
0.063
0.019
0.102
0.021
0.167
0.047
0.181
0.069
0.061
0.017
B
b1
C
C1
D
D1
e
H
3-Lead SOT-89 Surface Mount Package
Richtek Technology Corporation
14F, No. 8, Tai Yuen 1st Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789
Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should
obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot
assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be
accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.
www.richtek.com
14
DS9818-11 August 2016
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