RT9819D-50PVL [RICHTEK]
Micro-Power Voltage Detectors; 微功耗电压检测器
| 型号： | RT9819D-50PVL |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | Micro-Power Voltage Detectors |
| 文件： | 总12页 (文件大小：125K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RT9819
Micro-Power Voltage Detectors
General Description
Features
z Internally Fixed Threshold 1.2V to 5V in 0.1V Step
The RT9819 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 RT9819 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. RT9819 is provided in SC-70-3,
SC-82 and SOT-23-3 packages.
z High Accuracy 1.5%
z Low Supply Current 3μA
z No External Components Required
z Quick Reset within 20μs
z Built-in Recovery Delay Include 0ms, 55ms, 220ms,
450ms Options
z Low Functional Supply Voltage 0.9V
z CMOS Push-Pull Output
z Small SC-70-3, SC-82 and SOT-23-3 Packages
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Computers
Ordering Information
z Controllers
-
RT9819
z Intelligent Instruments
z Critical μP and μC Power Monitoring
z Portable/Battery-Powered Equipment
Package Type
U3 : SC-70-3
V : SOT-23-3
VL : SOT-23-3 (L-Type)
Y : SC-82
YR : SC-82 (R-Type)
Marking Information
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
Threshold Voltage
12 : 1.2V
13 : 1.3V
:
Typical Application Circuit
49 : 4.9V
50 : 5.0V
RT9819
VDD
GND
VDD
Reset Active Timeout Period
A = 0ms (RESET)
up
RESET/
RESET
B = 55ms (RESET)
C = 220ms (RESET)
D = 450ms (RESET)
E = 0ms (RESET)
RESET/
RESET
F = 55ms (RESET)
G = 220ms (RESET)
H = 450ms (RESET)
Note :
RichTek Pb-free and Green 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.
`100%matte tin (Sn) plating.
DS9819-05 August 2007
www.richtek.com
1
RT9819
Pin Configurations
(TOP VIEW)
RESET/
RESET
VDD
3
VDD
3
VDD
3
NC
3
GND
NC
3
4
1
4
1
2
1
2
2
1
2
1
2
GND
VDD
GND
RESET/
RESET
VDD
RESET/
RESET
GND
GND
RESET/
RESET
RESET/
RESET
SC-70-3
SC-82
SC-82 (R-Type)
SOT-23-3
SOT-23-3 (L-Type)
Note : There is no pin1 indicator on top mark for SC-82 type, and pin 1 will be lower left pin when reading top mark from left to
right. Pin2 of SC-82 is wider than other pins.
Functional Pin Description
Pin Name
GND
Pin Function
Ground
RESET
RESET
VDD
Active Low Push-Pull Reset Output
Active High Push-Pull Reset Output
Power Pin
Function Block Diagram
VDD
VDD
P MOS
RESET/
RESET
Timer
CMP
VSET
N MOS
Threshold
Voltage Setting
POR
Power On Reset
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DS9819-05 August 2007
RT9819
Absolute Maximum Ratings (Note 1)
z Terminal Voltage (with Respect to GND)
VDD ------------------------------------------------------------------------------------------------------------------------ −0.3V to 6.0V
z All Other Inputs -------------------------------------------------------------------------------------------------------- −0.3V to VDD+0.3V
z Input Current, IVDD ----------------------------------------------------------------------------------------------------- 20mA
z PowerDissipation, PD@ TA = 25°C
SC-70-3/SC-82 --------------------------------------------------------------------------------------------------------- 0.25W
SOT-23-3 ---------------------------------------------------------------------------------------------------------------- 0.4W
z Package Thermal Resistance (Note 4)
SC-70-3/SC-82, θJA --------------------------------------------------------------------------------------------------- 400°C /W
SOT-23-3, θJA ----------------------------------------------------------------------------------------------------------- 250°C /W
z Lead Temperature (Soldering, 10sec.)---------------------------------------------------------------------------- 260°C
z Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 125°C
z ESD Susceptibility (Note 2)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 3)
z Junction Temperature Range---------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range---------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VDD = 3V, TA = 25°C, unless otherwise specified)
Parameter
Operating V (V
Symbol
Test Conditions
RT9819A/B/C/D
Min
0.9
1.1
--
Typ
Max
6
Units
--
) Range
OUT
V
I
V
DD
DD
RT9819E/F/G/H
--
6
Supply Current
Reset Threshold
VTH = 3V , V
= 4.5V
3
1.2 to 5.0
--
8
μA
V
DD
DD
V
--
--
TH
Threshold Voltage Accuracy
Threshold Voltage Hysteresis
ΔV
−1.5
--
+1.5
--
%
TH
V
t
0.01 V
20
V
HYS
TH
V
Drop to Reset Delay
Drop = V −125mV
--
--
μs
ms
ms
ms
ms
DD
RD
TH
RT9819A/E
--
0
--
RT9819B/F
RT9819C/G
RT9819D/H
35
143
292
55
75
297
608
Reset Active
Time Out Period
t
V
≥ 1.02 × V
RP
DD TH
220
450
V
< V
≥ 3V
,I
= 3.5mA,
,I = 1.2mA,
TH(MIN) SINK
DD
TH(MIN) SINK
--
--
--
--
--
--
0.4
0.3
0.3
V
TH
V
DD
< V
≥ 1.8V
V
V
RESET Output Voltage Low
OL
V
TH
V
> V > 1V,
DD
TH(MIN)
I
= 0.5mA
SINK
To be continued
DS9819-05 August 2007
www.richtek.com
3
RT9819
Parameter
Symbol
Test Conditions
> V
Min
−1.5
Typ
Max
Units
V
I
,
TH(MAX)
DD
V
--
--
DD
= 800μA, V ≥ 3V
SOURCE
TH
V
I
> V
,
DD
TH(MAX)
V
V
0.8 V
0.8 V
--
--
--
--
--
--
RESET Output Voltage High
RESET Output Voltage Low
OH
DD
DD
= 500μA, V ≥ 1.8V
SOURCE
TH
V
I
> V
,
DD
TH(MAX)
= 200μA, V ≥ 1.1V
SOURCE
TH
V
V
> V
,I = 3.5mA,
DD
TH(MAX) SINK
0.4
≥ 3V
TH
V
DD
V
TH
> V
,I
= 1.2mA,
TH(MAX) SINK
V
OL
V
V
--
--
--
--
--
--
--
0.3
0.3
--
≥ 1.8V
V
DD
V
TH
> V ,I = 0.5mA,
TH(MAX) SINK
≥ 1.2V
1.1V < V
< V
,
,
DD
TH(MIN)
= 200μA
0.8 V
0.8 V
DD
DD
I
SOURCE
1.8V < V
< V
TH(MIN)
= 500μA
,
TH(MIN)
= 800μA
DD
RESET Output Voltage High V
--
OH
I
SOURCE
3V < V
< V
DD
V
−1.5
--
DD
I
SOURCE
Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for
stress ratings. 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 for extended
periods may remain possibility to affect device reliability.
Note 2. Devices are ESD sensitive. Handling precaution recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
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4
DS9819-05 August 2007
RT9819
Typical Operating Characteristics
Nch Driver Output Current vs. VDS
Nch Driver Output Current vs. VDS
2.4
60
50
40
30
20
10
0
RT9819A-12
RT9819C-30
VDD = 2.8V
VDD = 1.1V
2
1.6
1.2
0.8
0.4
0
VDD = 2.5V
VDD = 2.0V
VDD = 1.0V
VDD = 1.5V
0
0.3
0.6
0.9
1.2
1.5
0
0.5
1
1.5
2
2.5
3
3.5
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
RT9819A-45
RT9819A
VDD = 4.4V
= 4.0V
5.0V
= 3.5V
= 3.0V
= 2.5V
= 2.0V
3.0V
2.9V
= 1.5V
0
1
2
3
4
5
0
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
3
2
1
0
RT9819A-12
RT9819C-30
80°C
25°C
80°C
25°C
-30°C
-30°C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage (V)
Input Voltage (V)
DS9819-05 August 2007
www.richtek.com
5
RT9819
Supply Current vs. Input Voltage
Power-Down Reset Delay vs. Temperature
4
3
2
1
0
15
RT9819A-12
RT9819A-45
80°C
25°C
12
9
VDROP = 200mV
-30°C
VDROP = 150mV
VDROP = 250mV
6
3
0
0
1
2
3
4
5
6
-50
-25
0
25
50
75
100
125
Temperature (°C)
Input Voltage (V)
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
RT9819C-30
RT9819A-45
VDROP = 200mV
VDROP = 150mV
VDROP = 250mV
VDROP = 200mV
VDROP = 150mV
VDROP = 250mV
0
0
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Nch Driver Sink Current vs. Input Voltage
Nch Driver Sink Current vs. Input Voltage
50
40
30
20
10
0
40
30
20
10
0
RT9819A-45, VDS = 0.5V
RT9819C-30, VDS = 0.5V
-30°C
-30°C
25°C
25°C
80°C
80°C
0
1
2
3
4
5
0
0.5
1
1.5
2
2.5
3
3.5
Input Voltage (V)
Input Voltage (V)
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6
DS9819-05 August 2007
RT9819
Reset Threshold Deviation vs. Temperature
Pch Driver Output Current vs. Input Voltage
6.00
25
RT9819
RT9819C-30
VDS = 2.1V
5.0V
4.5V
5.00
4.00
3.00
2.00
1.00
20
15
10
5
VDS = 1.5V
VDS = 1.0V
4.2V
2.2V
1.2V
VDS = 0.5V
0
-50
-25
0
25
50
75
100
125
0
1
2
3
4
5
6
Temperature
(°C)
Input Voltage (V)
Power-Up Reset Time-Out vs. Temperature
Power-Up Reset Time-Out vs. Temperature
500
100
RT9819C
RT9819A
400
300
200
100
0
75
50
25
0
VTH = 2.9V
VTH = 3.0V
VTH = 5.0V
VTH = 4.5V
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
(°C)
Temperature (°C)
Temperature
Nch Driver Output Current vs. VDS
Output Delay Time vs. Load Capacitance
1000
100
10
160
140
120
100
80
RT9819
RT9819G-31
VDD = 6.0V
= 5.5V
= 5.0V
= 4.5V
= 4.0V
VTH = 3.0V
1
60
= 3.5V
40
VTH = 2.9V
VTH = 5.0V
0.1
20
0.01
0
0.0001
0.0010
0.0100
0.1000
1.0000
0
1
2
3
4
5
6
Load Capacitance (uF)
VDS (V)
DS9819-05 August 2007
www.richtek.com
7
RT9819
Nch Driver Output Current vs. Input Voltage
Power Down Reset Time-Out vs. Temperature
60
50
40
30
20
10
0
500
RT9819G-31
VDS = 0.5V
RT9819G-31
-30°C
25°C
400
300
200
100
0
80°C
-50
-25
0
25
50
75
100
125
0
1
2
3
4
5
6
Temperature
(°C)
Input Voltage (V)
Output Voltage vs. Input Voltage
Power-Down Reset Time-Out vs. Temperature
7
30
RT9819G-31
RT9819G-31
6
5
4
3
2
1
0
25
20
VDROP = 200mV
VDROP = 150mV
15
10
VDROP = 250mV
5
0
-50
-25
0
25
50
75
100
125
0
1
2
3
4
5
6
Temperature
(°C)
Input Voltage (V)
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DS9819-05 August 2007
RT9819
Application Information
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.
DS9819-05 August 2007
www.richtek.com
9
RT9819
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
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DS9819-05 August 2007
RT9819
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
DS9819-05 August 2007
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11
RT9819
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
Richtek Technology Corporation
Headquarter
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
8F, No. 137, Lane 235, Paochiao Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek.com
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12
DS9819-05 August 2007
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