MDT7822
Voltage Detector
1 of 2
2005/10/18
1.General Description
MDT7822 is a voltage detector which
can generate a low level signal whenever the
input voltage (supply voltage) falls below
threshold voltage level (2.2v).
2. Features
Low detectable voltage 2.2V
Low power consumption
Built-in hysteresis characteristic
3. Applications
Battery detectors
Power checkers
Micro-controller reset
4. Pin Function Description
MDT7822
1
2
3
VDET VIN VSS
Pin Name
I/O
Function
VSS
Ground
VDET
Open
Drain
Supply voltage
detector. Output low if
Vin < 2.2V.
VIN
Input
Supply voltage input
ORDERING INFORMATION
Device
Package
MDT7822ST
SOT89
MDT7822
Voltage Detector
2 of 2
2005/10/18
5. Electrical Characteristics
6.Application Circuit
EXTERNAL COMPONENT : RPU=47K
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
HI to LOW
Detectable
Voltage
2.1 2.2 2.3
V
Low Battery
Detect
Voltage (LBDV) LOW to HI
Detectable
Voltage
2.2 2.3 2.4
V
LBDV hysteresis
Width
-----------------------
----
0.5 0.1 0.15
V
Ivin
No load
2
5
uA
Vin
Operating Voltage
---------------------------
1.2 7
V
VDET Sink Current VIN=2V
9
mA
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