RT9819E [RICHTEK]
暂无描述;
| 型号： | RT9819E |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | 暂无描述 |
| 文件： | 总13页 (文件大小：237K) |
| 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. The RT9819 is
provided in SC-70-3, SC-82, SOT-23-3 and WDFN-6L
1.6x1.6 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, SOT-23-3 and WDFN-6L
1.6x1.6 Packages
z RoHS Compliant and Halogen Free
Applications
z Computers
Ordering Information
-
RT9819
z Controllers
Package Type
U3 : SC-70-3
V : SOT-23-3
VL : SOT-23-3 (L-Type)
Y : SC-82
z Intelligent Instruments
z Critical μP and μC Power Monitoring
z Portable/Battery-Powered Equipment
YR : SC-82 (R-Type)
QW : WDFN-6L 1.6x1.6 (W-Type)
Typical Application Circuit
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
RT9819
VDD
GND
VDD
Threshold Voltage
12 : 1.2V
13 : 1.3V
:
up
RESET/
RESET
RESET/
RESET
49 : 4.9V
50 : 5.0V
Reset Active Timeout Period
A = 0ms (RESET)
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.
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 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9819-08 July 2013
www.richtek.com
1
RT9819
Pin Configurations
(TOP VIEW)
VDD
VDD
3
3
2
2
GND
GND
RESET/
RESET
RESET/
RESET
SC-70-3
SOT-23-3
VDD
GND
NC
3
4
3
2
2
GND
VDD
RESET/
RESET
RESET/
RESET
SC-82
SOT-23-3 (L-Type)
RESET/
RESET
NC
4
3
1
2
3
6
5
4
NC
NC
VDD
NC
2
7
GND
RESET/
RESET
VDD
GND
SC-82 (R-Type)
WDFN-6L 1.6x1.6
Functional Pin Description
Pin Name
Pin Function
GND
Ground.
RESET
RESET
VDD
Active Low Push-Pull Reset Output.
Active High Push-Pull Reset Output
Power Input.
NC
No Internal Connection.
Function Block Diagram
VDD
VDD
P MOS
RESET/
RESET
Timer
CMP
VSET
N MOS
Threshold
Voltage Setting
POR
Power On Reset
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS9819-08 July 2013
RT9819
Absolute Maximum Ratings (Note 1)
z Terminal Voltage (with Respect to GND)
VDD ---------------------------------------------------------------------------------------------------------------------- −0.3V to 6V
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
WDFN-6L 1.6x1.6 --------------------------------------------------------------------------------------------------- 1.7W
z Package Thermal Resistance (Note 2)
SC-70-3/SC-82, θJA ------------------------------------------------------------------------------------------------- 400°C/W
SOT-23-3, θJA --------------------------------------------------------------------------------------------------------- 250°C/W
WDFN-6L 1.6x1.6, θJA ---------------------------------------------------------------------------------------------- 58.5°C/W
z Lead Temperature (Soldering, 10sec.)-------------------------------------------------------------------------- 260°C
z Storage Temperature Range -------------------------------------------------------------------------------------- −65°C to 125°C
z ESD Susceptibility (Note 3)
HBM (Human Body Model)---------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------- 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
RT9819A/B/C/D
Min
0.9
1.1
--
Typ
Max
6
Unit
--
Operating VDD (VOUT) Range VDD
V
RT9819E/F/G/H
--
6
Supply Current
IDD
VTH = 3V , VDD = 4.5V
3
1.2 to 5
--
8
μA
V
Reset Threshold
VTH
ΔVTH
--
--
Threshold Voltage Accuracy
−1.5
--
1.5
--
%
Threshold Voltage Hysteresis VHYS
VDD Drop to Reset Delay tRD
RT9819A/E
0.01 VTH
20
V
Drop = VTH −125mV
VDD ≥ 1.02 × VTH
--
--
μs
ms
ms
ms
ms
--
0
--
RT9819B/F
RT9819C/G
RT9819D/H
35
143
292
55
75
297
608
Reset Active
Time Out Period
tRP
220
450
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9819-08 July 2013
www.richtek.com
3
RT9819
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
VDD < VTH(MIN) ,ISINK = 3.5mA,
VTH ≥ 3V
--
--
0.4
VDD < VTH(MIN) ,ISINK = 1.2mA,
VTH ≥ 1.8V
VOL
V
--
--
--
--
--
--
--
--
--
--
--
--
--
0.3
0.3
--
RESET Output Voltage Low
RESET Output Voltage High
VTH(MIN) > VDD > 1V,
ISINK = 0.5mA
VDD > VTH(MAX)
,
VDD −1.5
0.8 VDD
0.8 VDD
--
ISOURCE = 800μA, VTH ≥ 3V
VDD > VTH(MAX)
,
VOH
V
V
V
--
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
--
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
3V < VDD < VTH(MIN)
SOURCE = 800μA
RESET Output Voltage High VOH
--
I
,
--
I
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 single-layer and four-layer test board of JEDEC 51.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS9819-08 July 2013
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 = 2V
VDD = 1V
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
= 4V
5V
= 3.5V
= 3V
= 2.5V
= 2V
3V
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)
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9819-08 July 2013
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)
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS9819-08 July 2013
RT9819
Reset Threshold Deviation vs. Temperature
Pch Driver Output Current vs. Input Voltage
6.00
25
RT9819
RT9819C-30
VDS = 2.1V
5V
5.00
4.00
3.00
2.00
1.00
20
15
10
5
4.5V
VDS = 1.5V
VDS = 1V
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 = 3V
VTH = 5V
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
RT9819
RT9819G-31
VDD = 6V
= 5.5V
= 5V
= 4.5V
= 4V
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)
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9819-08 July 2013
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)
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS9819-08 July 2013
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.
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9819-08 July 2013
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
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
10
DS9819-08 July 2013
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
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS9819-08 July 2013
www.richtek.com
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
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
12
DS9819-08 July 2013
RT9819
2
1
2
1
DETAILA
Pin #1 ID and Tie Bar Mark Options
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
A3
b
0.700
0.000
0.175
0.200
1.550
0.950
1.550
0.550
0.800
0.050
0.250
0.300
1.650
1.050
1.650
0.650
0.028
0.000
0.007
0.008
0.061
0.037
0.061
0.022
0.031
0.002
0.010
0.012
0.065
0.041
0.065
0.026
D
D2
E
E2
e
0.500
0.020
L
0.190
0.290
0.007
0.011
W-Type 6L DFN 1.6x1.6 Package
Richtek Technology Corporation
5F, No. 20, Taiyuen 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.
DS9819-08 July 2013
www.richtek.com
13
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