Voltage Detectors ,70XX Series
General Description
70XX Series
are a set of three-terminal low
Features
Highly accuracy： ±1%
Low power consumption：TYP 1.8uA (Vin=3V)
Detect voltage range：2.0V~7.0V in 0.1V increments
Operating voltage range：1.5V~18V
Detect voltage temperature characteristics：
TYP±0.9mV/℃
Output configuration： NMOS
Package： SOT-23-3，SOT-89-3，TO-92
power voltage detectors implemented in NMOS
technology. Each voltage detector in the series
detects a particular fixed voltage ranging from 2.0V
to 7.0V. The voltage detectors consist of a high
precision and low power consumption standard
voltage source, a comparator, hysteresis circuit, and
an output driver. NMOS technology ensures low
power consumption.
7 0
Selection Table
Part No.
Detectable
Voltage
2.2V
2.4V
2.7V
3.3V
3.9V
4.4V
5.0V
Hysteresis
Width
0.11V
0.12V
0.135V
0.165V
0.195V
0.22V
0.25V
Tolerance
±
2%
±
2%
±
2%
±
2%
±
2%
±
2%
±
2%
TO92
SOT89
SOT23-3
70XX(for TO92)
70XX(for SOT89)
Package
Marking
7022
7024
7027
7033
7039
7044
7050
７０ＸＸ
７０ＸＸ
７０ＸＸ
Pin Assignment
Pin Number
SOT-23-3
SOT-89-3
TO-92
3
1
2
GND
V
OUT
V
IN
Ground
Output Voltage
Input Voltage
Pin Name
Functions
2
1
3
3
1
2
Block Diagram
Absolute Maximum Ratings
PARAMETER
V
IN
Input Voltage
Output Current
Output Voltage
Continuous Total Power
Dissipation
NMOS
SOT23-3
SOT89-3
TO-92
Operating Ambient Temperature
Storage Temperature
Soldering temperature and time
T
Opr
T
stg
T
solder
P
D
SYMBAL
V
IN
I
OUT
V
OUT
RATINGS
18
50
GND-0.3~ V
IN
+0.3
300
500
500
0~+70
-50~+125
260
℃
, 10s
℃
℃
mW
UNITS
V
mA
V
Electrical Characteristics
(
V
DET
=2.0V to 7.0V ,T
A
=25℃ ,unless otherwise noted)
Parameter
V
DET
V
HYS
Symbol
Detect
Voltage
Hysteresis
Width
V
DET
=2.0V~ 2.8V
I
IN
Operating
Current
V
DET
=2.8V~ 3.6V
V
DET
=3.6V ~ 4.7V
V
DET
=4.7V~ 7.0V
V
IN
Operating
Voltage
V
DET
=2.0V to 7.0V
V
DET
=2.0V~ 2.8V
V
DET
=2.8V~ 3.6V
V
DET
=3.6V ~ 4.7V
V
DET
=4.7V~ 7.0V
∆V
DET
/∆T
A
Temperature
characteristics
0
℃
≤T
opr
≤70℃
V
IN
=-V
DET(S)
-0.2
V , V
OUT
=0.2V
V
IN
=-V
DET(S)
-0.5
V , V
OUT
=0.3V
V
IN
=-V
DET(S)
-0.5
V , V
OUT
=0.3V
V
IN
=-V
DET(S)
-0.5
V , V
OUT
=0.3V
V
IN
=3.0V
V
IN
=4.0V
V
IN
=5.0V
V
IN
=8.0V
Conditions
Min.
V
DET
×0.99
V
DET
×0.02
-
-
-
-
0.7
0.5
0.5
1.2
2.5
±0.9
mV/℃
mA
Typ.
V
DET
V
DET
×0.05
1.8
1.8
2.1
2.5
-
Max.
V
DET
×1.01
V
DET
×0.1
3
4
4
4
18
V
μA
Units
V
V
I
OL
Output Sink
Current
Note:
Use this IC within the stated maximum ratings. Operation beyond these limits may cause degrading or
permanent damage to the device.
Functional Description
The 70xx series is a set of vo
ltage detectors equipped with a high stability voltage reference which is
connected to the negative input of a comparator — denoted as V
REF
in the following figure (Fig. 1).When the voltage
drop to the positive input of the comparator (i,e,V
B
) is higher than V
REF
, V
OUT
goes high, M1 turns off, and V
B
is
B
B
ex-pressed as V
BH
=V
IN
×(R
B
+R
C
)/(R
A
+R
B
+R
C
).If V
IN
is decreased so that V
B
falls to a value that is less than V
REF
, the
B
B
B
comparator output inverts (from high to low), V
OUT
goes low, V
C
is high, M1 turns on, R
C
is bypassed, and V
B
B
becomes: V
BL
=V
IN
×R
B
/(R
A
+R
B
), which is less than V
BH
. By so doing the comparator out-put will stay low to prevent
B
B
the circuit from oscillating when V
B
≈
V
REF
. If V
IN
falls bellow the minimum operating voltage, the output becomes
B
undefined. When V
IN
goes from low to V
IN
×R
B
/(R
A
+R
B
) >V
REF
, the comparator output goes high and V
OUT
goes high
B
B
again. The detection voltage is as defined:
V
DET(–)
=( R
A
+R
B
+R
C
)×V
REF
/( R
B
+R
C
)
B
B
The release voltage is as defined:
V
DET(+)
=(R
A
+R
B
)×V
REF
/ R
B
B
B
The hysteresis width is:
V
HYS
=V
DET(+)
–V
DET(–)
Fig.1 demonstrates the NMOS output type with positive output polarity (V
OUT
is normally high, active low).
Fig.1 NMOS output volt
age detector (70XX)
Timing Chart
Package
●
SOT89-3
Information
●
SOT23-3
电机控制
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