RT9817_11 [RICHTEK]
Micro-Power Voltage Detectors with Manual Reset; 微功耗电压检测器，带有手动复位
| 型号： | RT9817_11 |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | Micro-Power Voltage Detectors with Manual Reset |
| 文件： | 总11页 (文件大小：139K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RT9817
Micro-Power Voltage Detectors with Manual Reset
General Description
Features
z Internally Fixed Threshold 1.2V to 5V in 0.1V Step
The RT9817 is a micro-power voltage detector with
deglitched manual reset input 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 RT9817 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. To pull reset signal
low manually, just pull the manual reset input (MR) below
the specified VIL level. RT9817 is provided in SC-82 and
SOT-143 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 800ns Glitch Immunity of Manual Reset Input
z Low Functional Supply Voltage 0.9V
z CMOS Push-Pull Output
z Small SC-82 and SOT-143 Packages
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Computers
z Controllers
z Intelligent Instruments
z Critical μP and μC Power Monitoring
z Portable/Battery-Powered Equipment
Ordering Information
-
RT9817
Package Type
H : SOT-143
Y : SC-82
Pin Configurations
Lead Plating System
P : Pb Free
(TOP VIEW)
G : Green (Halogen Free and Pb Free)
Threshold Voltage
12 : 1.2V
13 : 1.3V
:
VDD
MR
VDD
MR
4
3
4
3
2
2
49 : 4.9V
50 : 5.0V
GND
RESET/
RESET
GND
RESET/
RESET
Reset Active Timeout Period
A = 0ms (RESET)
SOT-143
SC-82
B = 55ms (RESET)
C = 220ms (RESET)
D = 450ms (RESET)
E = 0ms (RESET)
F = 55ms (RESET)
G = 220ms (RESET)
H = 450ms (RESET)
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
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.
DS9817-09 April 2011
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1
RT9817
Typical Application Circuit
RT9817
VDD
up
GND
VDD
RESET/
RESET
RESET/
RESET
MR
Functional Pin Description
Pin Name
GND
Pin Function
Ground Pin
RESET
RESET
MR
Active Low Push-Pull Reset Output
Active High Push-Pull Reset Output
Manual Reset
VDD
Power Pin
Function Block Diagram
VDD
VDD
MR
P MOS
RESET/
RESET
Timer
CMP
VSET
N MOS
Threshold
Voltage Setting
POR
Power On Reset
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RT9817
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 V +0.3V
DD
z Input Current, IVDD ----------------------------------------------------------------------------------------------------- 20mA
z Power Dissipation, PD @ TA = 25°C
SC-82 -------------------------------------------------------------------------------------------------------------------- 0.25W
SOT-143 ----------------------------------------------------------------------------------------------------------------- 0.285W
z Package Thermal Resistance (Note 2)
SC-82, θJA --------------------------------------------------------------------------------------------------------------- 400°C
SOT-143, θJA ------------------------------------------------------------------------------------------------------------ 350°C
z Lead Temperature (Soldering, 10sec.)---------------------------------------------------------------------------- 260°C
z Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 125°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
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
Symbol
Test Conditions
RT9817A/B/C/D
Min
0.9
1.1
--
Typ
Max
6
Unit
--
Operating VDD (VOUT) Range
VDD
V
RT9817E/F/G/H
--
6
Supply Current
IDD
VTH = 3V , VDD = 4.5V
3
1.2 to 5.0
--
8
μA
V
Reset Threshold
VTH
ΔVTH
--
--
Threshold Voltage Accuracy
−1.5
--
+1.5
--
%
Threshold Voltage Hysteresis VHYS
VDD Drop to Reset Delay tRD
RT9817A/E
0.01 VTH
20
V
Drop = VTH −125mV
VDD ≥ 1.02 × VTH
--
--
μs
ms
ms
ms
ms
--
0
--
RT9817B/F
RT9817C/G
RT9817D/H
35
143
292
55
75
297
608
Reset Active
Time Out Period
tRP
220
450
VDD < VTH(MIN) ,ISINK = 3.5mA,
VTH ≥ 3V
--
--
--
--
--
--
0.4
0.3
0.3
VDD < VTH(MIN) ,ISINK = 1.2mA,
VTH ≥ 1.8V
VTH(MIN) > VDD > 1V,
ISINK = 0.5mA
VOL
V
RESET Output Voltage Low
To be continued
DS9817-09 April 2011
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RT9817
Parameter
Symbol
Test Conditions
VDD > VTH(MAX)
SOURCE = 800μA, VTH ≥ 3V
VDD > VTH(MAX)
Min
Typ
Max
Unit
,
VDD −1.5
--
--
I
,
VOH
V
RESET Output Voltage High
0.8 VDD
0.8 VDD
--
--
--
--
--
--
--
--
--
--
--
ISOURCE = 500μA, VTH ≥ 1.8V
VDD > VTH(MAX) ,
ISOURCE = 200μA, VTH ≥ 1.1V
VDD > VTH(MAX) ,ISINK = 3.5mA,
VTH ≥ 3V
0.4
0.3
0.3
--
VDD > VTH(MAX) ,ISINK = 1.2mA,
VTH ≥ 1.8V
RESET Output Voltage Low VOL
V
V
--
VDD > VTH(MAX) ,ISINK = 0.5mA,
--
VTH ≥ 1.2V
1.1V < VDD < VTH(MIN)
,
,
0.8 VDD
0.8 VDD
VDD −1.5
I
SOURCE = 200μA
1.8V < VDD < VTH(MIN)
SOURCE = 500μA
RESET Output Voltage High VOH
--
I
3V < VDD < VTH(MIN)
,
--
ISOURCE = 800μA
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. 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.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
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RT9817
Typical Operating Characteristics
Nch Driver Output Current vs. VDS
Nch Driver Output Current vs. VDS
2.4
60
50
40
30
20
10
0
RT9817A-12
RT9817C-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
RT9817A-45
RT9817A
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
RT9817A-12
RT9817C-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)
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RT9817
Supply Current vs. Input Voltage
Power-Down Reset Delay vs. Temperature
4
3
2
1
0
15
RT9817A-45
RT9817A-12
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
RT9817C-30
RT9817A-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
RT9817A-45, VDS = 0.5V
RT9817C-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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RT9817
Reset Threshold Deviation vs. Temperature
Pch Driver Output Current vs. Input Voltage
6.00
25
RT9817
RT9817C-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
RT9817A
RT9817C
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
Temperature (°C)
Nch Driver Output Current vs. VDS
Output Delay Time vs. Load Capacitance
1000
100
10
160
140
120
100
80
RT9817G-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)
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RT9817
Nch Driver Output Current vs. Input Voltage
Power Down Reset Time-Out vs. Temperature
60
50
40
30
20
10
0
500
RT9817G-31
VDS = 0.5V
RT9817G-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
RT9817G-31
RT9817G-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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DS9817-09 April 2011
RT9817
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.
DS9817-09 April 2011
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RT9817
Outline Dimension
D
e
H
L
B
C
A
b
b1
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.800
0.050
1.200
0.300
0.760
2.100
2.800
1.200
0.150
1.400
0.520
0.920
2.640
3.040
0.031
0.002
0.047
0.012
0.030
0.083
0.110
0.047
0.006
0.055
0.020
0.036
0.104
0.120
b
b1
C
D
e
1.900
0.075
H
L
0.080
0.210
0.150
0.410
0.003
0.008
0.006
0.016
SOT-143 Surface Mount Package
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DS9817-09 April 2011
RT9817
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
Richtek Technology Corporation
Headquarter
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
5F, No. 95, Minchiuan Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)86672399 Fax: (8862)86672377
Email: marketing@richtek.com
Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design,
specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be guaranteed
by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.
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