RT9808-19CX [ETC]
MICRO POWER VOLTAGE DETECTORS; 微功耗电压检测器
| 型号： | RT9808-19CX |
| 厂家： | 
ETC |
| 描述： | MICRO POWER VOLTAGE DETECTORS |
| 文件： | 总12页 (文件大小：200K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary
RT9808
Micro-Power Voltage Detectors
General Description
Features
The RT9808 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 1.5V to 5V, which covers most digital
applications. It features low supply current of 3µA.
z Internally Fixed Threshold 1.5V to 5V in 0.1V Step
z
2% Accuracy
z Low Supply Current 3µA
z Quick Reset within 20µS
z Built-in Recovery Delay 200mS
z Low Functional Supply Voltage 0.9V
z N-Channel Open Drain Output
z Small 3-Pin SOT-23/SOT89 and 5-Pin SOT-25
Packages
The RT9808 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 up-crossing the threshold level,
the reset signal will be released if VDD is above
threshold and last for the whole period of reset active
time out.
Pin Configurations
Part Number
Pin Configurations
TOP VIEW
RT9808-ꢀꢀCV
(Plastic SOT-23)
3
1. RESET
2. GND
3. VDD
2
1
RT9808 is n-channel, open-drain output.
RT9808-ꢀꢀCX
(Plastic SOT-89)
TOP VIEW
Applications
1. RESET
2. VDD
3. GND
z Computers
z Controllers
1
2
3
z Intelligent Instruments
z Critical µP and µC Power Monitoring
z Portable/Battery-Powered Equipment
RT9808-ꢀꢀCB
(Plastic SOT-25)
TOP VIEW
5
4
1. RESET
2. VDD
3. GND
4. NC
Ordering Information
3
1
2
RT9808-ꢀꢀ ꢀ ꢀ
Package Type
V : SOT-23
5. NC
Typical Application Circuit
X : SOT-89
B : SOT-25
Operating temperature range
C: Commercial standard
VDD
RT9808
GND
Pull
Up
Reset Threshold
15 : 1.5V
16 : 1.6V
:
100K
P
µ
VDD
RESET
RESET
49 : 4.9V
50 : 5.0V
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1
RT9808
Preliminary
Pin Description
Pin Name
GND
Pin Function
Ground Pin
RESET
VDD
Reset Pulse Output, Negative Pulse
Power Pin
NC
No Connected
Function Block Diagram
VDD
CMP
RESET
TIMER
VSET
N
Threshold Voltage Setting
POR
Power On Reset
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Preliminary
RT9808
Absolute Maximum Ratings
z Terminal Voltage (with Respect to GND)
VDD
-0.3V to 6.0V
All Other Inputs
z Input Current, VDD
z Output Current, RESET
-0.3V to VDD+0.3V
20mA
20mA
z Power Dissipation, P @ T = 25°C
D
A
SOT-23
SOT-89
SOT-25
0.25W
0.5W
0.25W
z Operating Junction Temperature Range
z Storage Temperature Range
-40°C ~ 125°C
-65°C ~ 125°C
z Package Thermal Resistance
SOT-23, θ
SOT-89, θ
SOT-89, θ
SOT-25, θ
250°C /W
100°C /W
300°C /W
250°C /W
260°C
JA
JC
JA
JA
z Lead Temperature (Soldering, 5sec.)
Electrical Characteristics
(VDD = 3.0, unless specified)
Parameter
Symbol
Test Conditions
Min
0.9
--
Typ
--
Max
6
Units
V
Operating VDD (V
) Range
V
DD
OUT
Supply Current
Reset Threshold
3
--
µA
V
I
V
= 1.5V ~ 5V, I
= 0
OUT
DD
DD
--
Note1
--
--
V
TH
T = 27°C
A
Threshold Voltage Accuracy
Drop to Reset Delay
--
2
%
∆V
T = 27°C
Drop = -125mV
TH
RD
RP
A
--
--
20
--
µS
mS
V
V
CC
t
t
Reset Active Time Out Period
RESET Output Voltage
--
200
0.4
V
≥ 1.02×V
TH
DD
DD
--
--
V
OL
V
< V , I
> 3.5mA
TH SINK
Note1: 1.5V ~ 5V, step 0.1V
DS9808-01 January 2002
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RT9808
Measuring Circuit
Preliminary
(1) Detection Voltage
(3) Output Transistor Current
VDD
Ω
VDD
RT9808
VSS
R (100k )
100k
Ω
CRT
VDD
RT9808
Oscilloscope
OUT
V
6V
OUT
P.G
CL
VSS
(4) Dynamic Response
(2) Current Consumption
A
VDD
VDD
RT9808
VSS
VDD
OUT
V
VDD
A
RT9808
V
V
OUT
VSS
VDS
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DS9808-01 January 2002
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Preliminary
RT9808
Typical Operating Characteristics
Nch Driver Output Current vs. VDS
Nch Driver Output Current vs. VDS
7
12
10
8
2.2V
6
2.0V
5
4
6
3
2
1
1.5V
4
2
T
= 25°C
T
= 25°C
RT9808-24CV
RT9808-20CV
0
0
0
0.5
1
1.5
2
2.5 3
0
0.5
1
1.5
VDS (V)
2
2.5 3
VDS (V)
Nch Driver Output Current vs. VDS
Nch Driver Output Current vs. VDS
18
15
12
9
36
30
24
18
12
6
2.8V
4.0V
3.5V
3.0V
2.0V
2.5V
2.0V
6
1.5V
3
T
= 25°C
1.5V
T
= 25°C
RT9808-30CV
RT9808-45CV
0
0
0
0.5
1
1.5
VDS (V)
2
2.5 3
0
1
2
3 4
VDS (V)
Nch Driver output Current vs. VDS
Output Voltage vs. Input Voltage
7
6
5
4
3
2
1
0
40
32
24
16
8
4.5V
T
= 25°C
4.0V
3.5V
5.0V
4.5V
3.0V
3.0V
2.4V
2.5V
2.0V
2.0
2.0V
T
= 25°C
1.5V
2
RT9808-50CV
0
0
1
3
4
5
0.0
1.0
3.0
4.0
5.0
6.0
VDS (V)
Input Voltage VIN (V)
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RT9808
Preliminary
Supply Current vs. Input Voltage
Supply Current vs. Input Voltage
4
3
2
1
0
4
3
2
1
0
°
80 C
80 C
°
25 C
25 C
°
-30 C
-30 C
RT9808-20CV
5
RT9808-24CV
5 6
0
1
2
3
4
6
0
1
2
3
4
Input Voltage VIN (V)
Input Voltage VIN (V)
Supply Current vs. Input Voltage
Supply Current vs. Input Voltage
5
4
3
2
1
0
°
80 C
4
3
2
1
0
°
80 C
°
25 C
°
25 C
°
-30 C
°
-30 C
RT9808-30CV
5 6
RT9808-45CV
5 6
0
1
2
3
4
0
1
2
3
4
Input Voltage VIN (V)
Input Voltage VIN (V)
Supply Current vs. Input Voltage
Reset Threshold Deviation vs. Temp.
5.1
4.7
4.3
3.9
3.5
3.1
2.7
2.3
1.9
5
4
3
2
1
0
5V
°
80 C
4.5V
°
25 C
°
-30 C
3V
2.4V
2V
RT9808-50CV
5 6
-40
-15
10
35
60
85
0
1
2
3
4
°
Temperture ( C)
Input Voltage VIN (V)
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DS9808-01 January 2002
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Preliminary
RT9808
Nch Driver Output Current vs. Input Voltage
Nch Driver Output Current vs. Input Voltage
10
10
RT9808-20CV
RT9808-24CV
VDS = 0.5V
VDS = 0.5V
8
8
°
-30 C
°
-30 C
6
4
2
0
6
4
2
0
°
25 C
°
25 C
°
80 C
°
80 C
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
Input Voltage VIN (V)
Input Voltage VIN (V)
Nch Driver Output Current vs. Input Voltage
Nch Driver Output Current vs. Input Voltage
12
16
RT9808-45CV
RT9808-30CV
VDS = 0.5V
VDS = 0.5V
14
12
10
8
10
8
°
°
-30 C
-30 C
°
25 C
°
25 C
6
°
80 C
6
4
°
80 C
4
2
2
0
0
0
0.5
1
1.5
2
2.5
3
3.5
0
1
2
3
4
5
Input Voltage VIN (V)
Input Voltage VIN (V)
Nch Driver Output Current vs. Input Voltage
Power-Up reset Timeout vs. Temp.
18
350
300
250
200
150
100
50
RT9808-50CV
VDS = 0.5V
15
12
9
°
-30 C
2V
2.4V
3V
4.5V
°
25 C
5V
6
°
80 C
3
0
-40
-15
10
35
60
85
0
1
2
3
4
5
6
°
Temperture ( C)
Input Voltage VIN (V)
DS9808-01 January 2002
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RT9808
Preliminary
Power-Down Reset Delay vs. Temp.
Power-Down Reset Delay vs. Temp.
4.0
3.0
2.0
1.0
0.0
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Vdrop = 150mV
drop = 200mV
Vdrop = 150mV
V
Vdrop = 200mV
Vdrop = 250mV
Vdrop = 250mV
RT9808-20CV
60
RT9808-24CV
60 85
-40
-15
10
35
85
-40
-15
10
35
°
°
Temperture ( C)
Temperture ( C)
Power-Down Reset Delay vs. Temp.
Power-Down Reset Delay vs. Temp.
1.5
1.2
0.9
0.6
0.3
0.0
1.5
1.2
0.9
0.6
0.3
0.0
Vdrop = 200mV
Vdrop = 150mV
Vdrop = 200mV
Vdrop = 150mV
drop = 250mV
Vdrop = 250mV
V
RT9808-30CV
60
RT9808-45CV
60 85
-40
-15
10
35
85
-40
-15
10
35
°
°
Temperture ( C)
Temperture ( C)
Output Delay Time vs. Load Capacitance
Power-Down Reset Delay vs. Temp.
1.5
1000
1.2
0.9
0.6
0.3
0.0
100
10
1
Vdrop = 200mV
Vdrop = 150mV
Vdrop = 250mV
2.4V
4.5V
5V
2V
3V
T
= 25°C
RT9808-50CV
-40
-15
10
35
60
85
0.0001
0.001
0.01
0.1
°
Temperture ( C)
Load Capacitance COUT (uF)
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DS9808-01 January 2002
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Preliminary
RT9808
Package Information
D
B
C
e
A
H
L
b
A1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
0.889
--
Max
Min
0.035
--
Max
A
A1
B
1.295
0.152
1.803
0.508
2.997
3.099
2.007
0.254
0.610
0.051
0.006
0.071
0.020
0.118
0.122
0.079
0.010
0.024
1.397
0.356
2.591
2.692
1.803
0.102
0.356
0.055
0.014
0.102
0.106
0.071
0.004
0.014
b
C
D
e
H
L
SOT-23 Plastic Surface Mount
DS9808-01 January 2002
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RT9808
Preliminary
D
A
D1
H
B
C
C1
e
e
A
b
b1
b
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
1.397
0.356
2.388
0.406
--
Max
Min
0.055
0.014
0.094
0.016
--
Max
A
b
1.600
0.483
2.591
0.533
4.242
1.194
4.597
1.753
1.549
0.432
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
0.787
4.394
1.397
1.448
0.381
0.031
0.173
0.055
0.057
0.015
D1
e
H
3-Lead SOT-89 Surface Mount
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DS9808-01 January 2002
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Preliminary
RT9808
D
b
C
B
H
A
L
e
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
0.838
0.102
0.356
1.295
0.152
1.803
0.559
2.997
3.099
1.041
0.254
0.610
0.035
0.000
0.055
0.014
0.102
0.106
0.033
0.004
0.014
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- 25 Surface Mount Package
DS9808-01 January 2002
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RT9808
Preliminary
RICHTEK TECHNOLOGY CORP.
Headquarter
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
6F, No. 35, Hsintai Road, Chupei City
8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City
Hsinchu, Taiwan, R.O.C.
Taipei County, Taiwan, R.O.C.
Tel: (8863)5510047 Fax: (8863)5537749
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek-ic.com.tw
www.richtek-ic.com.tw
DS9808-01 January 2002
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