BL8504
High-Precision Low Voltage Detector
DESCRIPTION
BL8504 is a series of high precision voltage
detector with ultra low current consumption
(500nA typ. at Vdd=3.0V). It can work at very
low voltage, which makes it perfect for
system reset.
BL8504 is composed of high precision
voltage reference, comparator, output driver
and resistor array. Internally preset detect
voltage has a low temperature drift and
requires no external trimming.
One type of output, N-channel open-drain is
available.
BL8504 is available in small size SOT23-3
package which is Pb free.
FEATURES
•
•
•
•
•
High-precision detection Voltage：
±3%
Detection Voltage：0.9V~6.0V (in 0.1V
steps)
Precise hysteresis：4% typ.
Operating Voltage range：0.7V~10V
Ultra-low current consumption：500nA
typ. (at VDD＝3.0V)
APPLICATIONS
•
•
•
•
•
Power monitor for portable equipment
such as PDA,DSC,Mobile
phone,Notebook,MP3
CPU and Logic Circuit Reset
Battery Checker
Battery Back-up Circuit
Power Failure Detector
TYPICAL APPLICATION
ELECTRICAL CHARACTERISTICS
Detector threshold= 0.9V
1.E-05
Supply current(A)
1.E-06
-40ºC
1.E-07
1.E-08
0
1
2
3
4
5
6
Input voltage (V)
25ºC
70ºC
BL8504
BL8504
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1
BL8504
ORDERING INFORMATION
BL8504
□□□□□
1 2 3 4 5
PIN CONFIGURATION
Product Classification
Marking
N: N-channel
open drain
output type
5: Product
Code
XX: Detector
Voltage
BL8504CB3TR□□□
Code
1
□
2
□
3
□
Description
Temperature&Rohs:
C:-40~85°C ,Pb Free Rohs Std.
Package type:
B3:SOT-23-3
Packing type:
TR:Tape&Reel (Standard)
Output voltage:
e.g. 09=0.9V
27=2.7V
60=6.0V
Output forms:
N:N-channel open drain
N5XX
4
□
5
□
Vss
Vin
Vout
Ground Pin
Supply Voltage Input
Voltage detection output pin
ABSOLUTE MAXIMUM RATING
Parameter
Input Voltage
Output Voltage range
Maximum Output current
Ambient Temperature(Ta)
Power Dissipation
Storage Temperature(Ts)
Lead Temperature & Time
Value
-0.3V-10V
-0.3V-12V
70mA
-40°C -85°C
SOT-23-3: 250mW
-40°C -150°C
260°C,10S
Note:
Exceed these limits to damage to the device.
Exposure to absolute maximum rating conditions may affect device reliability.
RECOMMENDED WORK CONDITIONS
Item
Input Voltage Range
Ambient Temperature
Min
0.7
-40
Recommended
25
Max.
10
85
Unit
V
°C
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BL8504
ELECTRICAL CHARACTERISTICS
BL8504CB3TR09N (Topt＝25℃,Unless otherwise specified.)
Symbol
-VDET
VHYS
ISS
VDDH
VDDL
IOUT
TPLH
Parameter
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
Output Current
Output Delay Time
Conditions
Min.
0.873
0.018
VDD=2.9V
Reference Data
Typ.
Max.
0.900
0.927
0.036
1.0
0.054
2.5
10
0.5
VDS=0.05V, VDD=0.7V
VDS=0.50V, VDD=0.8V
0.01
0.05
0.05
0.50
20
Unit
V
V
uA
V
V
mA
uS
BL8504CXXTR27N (Topt＝25℃,Unless otherwise specified.)
Symbol
-VDET
VHYS
ISS
VDDH
VDDL
IOUT
TPLH
Parameter
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
Output Current
Output Delay Time
Conditions
Min.
2.619
0.054
VDD=4.7V
Reference Data
Typ.
Max.
2.700
2.781
0.108
0.5
0.162
2.5
10
0.5
VDS=0.05V, VDD=0.7V
0.01
0.05
20
Unit
V
V
uA
V
V
mA
uS
BL8504CXXTR30N (Topt＝25℃,Unless otherwise specified.)
Symbol
-VDET
VHYS
ISS
VDDH
VDDL
IOUT
TPLH
Parameter
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
Output Current
Output Delay Time
Conditions
Min.
2.91
0.060
VDD=5.0V
Reference Data
Typ.
Max.
3.00
3.09
0.12
0.5
0.18
2.5
10
0.5
VDS=0.05V, VDD=0.7V
0.01
0.05
20
Unit
V
V
uA
V
V
mA
uS
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BL8504
BL8504CXXTR34N (Topt＝25℃,Unless otherwise specified.)
Symbol
-VDET
VHYS
ISS
VDDH
VDDL
IOUT
TPLH
Parameter
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
Output Current
Output Delay Time
Conditions
Min.
3.298
0.068
VDD=5.0V
Reference Data
Typ.
Max.
3.40
3.502
0.136
0.5
0.204
2.5
10
0.5
VDS=0.05V, VDD=0.7V
0.01
0.05
20
Unit
V
V
uA
V
V
mA
uS
BL8504CXXTR44N (Topt＝25℃,Unless otherwise specified.)
Symbol
-VDET
VHYS
ISS
VDDH
VDDL
IOUT
TPLH
Parameter
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
Output Current
Output Delay Time
Conditions
Reference Data
Min.
Typ.
Max.
4.268
4.40
4.532
0.088
VDD=6.4V
0.176
0.5
0.264
2.5
10
0.5
VDS=0.05V，VDD=0.7V
0.01
0.05
20
Unit
V
V
uA
V
V
mA
uS
BLOCK DIAGRAM
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BL8504
FUNCTION DESCRIPTION
In BL8504, a high precision low temperature
coefficient reference voltage is applied to the
negative input of a comparator. Input voltage,
divided by resistor array of Ra, Rb and Rc, is
applied to the positive input of the comparator.
Output of the comparator controls a pair of
NMOS and PMOS switches, generating the
hysteresis. Output of the comparator passes
a series of buffer to drive the output NMOS.
OUTPUT ACTION
No.
I
II
III
IV
V
Operation status
VDD>-VDET
VDD drops below - VDET
VDD drops further below
VDDL
VDD rises above VDDL
VDD rises above + VDET
Output status
Output voltage is equal to the supply voltage
Output voltage equals to GND level
Output voltage is undefined
Output voltage equals to GND level
Output voltage equals to supply voltage，VHYS=(+
VDET)-(- VDET)
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