BL8504

BL8504
High-Precision Low Voltage Detector
DESCRIPTION
FEATURES
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.
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
One type of output, N-channel open-drain is
available.
•
BL8504 is available in small size SOT23-3
package which is Pb free.
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•
•
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TYPICAL APPLICATION
ELECTRICAL CHARACTERISTICS
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
Detector threshold= 0.9V
Supply current(A)
1.E-05
BL8504
BL8504
1.E-06
-40ºC
1.E-07
25ºC
70ºC
1.E-08
0
1
2
3
4
Input voltage (V)
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1
5
6
BL8504
ORDERING INFORMATION
PIN CONFIGURATION
BL8504 □
1 □
2 □
3 □
4 □
5
Product Classification
Code
Description
1
□
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
2
□
3
□
4
□
5
□
BL8504CB3TR□□□
Marking
N5XX
N: N-channel
open drain
output type
5: Product
Code
XX: Detector
Voltage
Vss
Vin
Vout
Ground Pin
Supply Voltage Input
Voltage detection output pin
ABSOLUTE MAXIMUM RATING
Parameter
Value
Input Voltage
Output Voltage range
Maximum Output current
Ambient Temperature(Ta)
Power Dissipation
Storage Temperature(Ts)
Lead Temperature & Time
-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
Min
Input Voltage Range
Ambient Temperature
0.7
-40
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Recommended
Max.
Unit
25
10
85
V
°C
2
BL8504
ELECTRICAL CHARACTERISTICS
BL8504CB3TR09N (Topt＝25℃,Unless otherwise specified.)
Symbol
Parameter
-VDET
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
VHYS
ISS
VDDH
VDDL
IOUT
Output Current
TPLH
Output Delay Time
Conditions
Min.
0.873
0.018
VDD=2.9V
VDS=0.05V, VDD=0.7V
VDS=0.50V, VDD=0.8V
0.01
0.05
Reference Data
Typ.
Max.
0.900
0.927
Unit
V
0.036
0.054
V
1.0
2.5
uA
10
V
0.5
V
0.05
0.50
mA
20
uS
BL8504CXXTR27N (Topt＝25℃,Unless otherwise specified.)
Symbol
Parameter
-VDET
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
Output Current
Output Delay Time
VHYS
ISS
VDDH
VDDL
IOUT
TPLH
Conditions
Min.
2.619
0.054
VDD=4.7V
VDS=0.05V, VDD=0.7V
0.01
Reference Data
Typ.
Max.
2.700
2.781
Unit
V
0.108
0.162
V
0.5
2.5
uA
10
V
0.5
V
0.05
mA
uS
20
BL8504CXXTR30N (Topt＝25℃,Unless otherwise specified.)
Symbol
Parameter
-VDET
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
Output Current
Output Delay Time
VHYS
ISS
VDDH
VDDL
IOUT
TPLH
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Conditions
Min.
2.91
0.060
VDD=5.0V
Reference Data
Typ.
Max.
3.00
3.09
0.01
0.18
V
0.5
2.5
uA
10
V
V
0.05
20
3
V
0.12
0.5
VDS=0.05V, VDD=0.7V
Unit
mA
uS
BL8504
BL8504CXXTR34N (Topt＝25℃,Unless otherwise specified.)
Symbol
Parameter
-VDET
Detector Threshold
Detector
Threshold
Hysteresis
Current Consumption
Maximum
Operating
Voltage
Minimum
Operating
Voltage
Output Current
Output Delay Time
VHYS
ISS
VDDH
VDDL
IOUT
TPLH
Conditions
Min.
3.298
0.068
VDD=5.0V
Reference Data
Typ.
Max.
3.40
3.502
0.01
V
0.136
0.204
V
0.5
2.5
uA
10
V
0.5
VDS=0.05V, VDD=0.7V
Unit
V
0.05
mA
uS
20
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
Min.
4.268
0.088
VDD=6.4V
VDS=0.05V，VDD=0.7V
4
Unit
V
0.176
0.264
V
0.5
2.5
uA
10
V
0.5
V
0.05
mA
uS
20
BLOCK DIAGRAM
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0.01
Reference Data
Typ.
Max.
4.40
4.532
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
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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)
5
BL8504
TYPICAL PERFORMANCE CHARACTERISTICS
1) Output voltage VS. Input voltage
Detector threshold= 0.9V
（ -40°C）
Output voltage (V)
1
0.8
0.6
0.4
0.2
1.2
1.0
0.8
0.6
0.4
0.9
1.1
1.3
1.5
0.5
Input voltage (V)
Output voltage (V)
Output voltage (V)
Vin(high
to low)
2.5
Vin(low
to high)
2.0
1.5
1.0
0.5
0.0
2.5
2.7
2.9
1.1
1.3
0.5
1.5
1.5
1.0
0.5
0.0
2.8
3.0
3.2
Input voltage (V)
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3.4
1.1
1.3
1.5
3.0
Vin(high
to low)
2.5
Vin(low to
high)
2.0
1.5
1.0
0.5
Vin(high
to low)
2.5
Vin(low to
high)
2.0
1.5
1.0
0.5
0.0
2.5
2.7
2.9
3.1
2.3
Detector threshold=3.0V （25°C）
Vin(hi
gh to
low)
3.0
2.5
Vin(lo
w to
high)
2.0
2.5
2.7
2.9
3.1
Input voltage (V)
1.5
1.0
0.5
0.0
2.6
0.9
Input voltage (V)
Input voltage (V)
Output voltage (V)
2.0
0.7
3.0
3.1
Vin(h
igh to
low)
Vin(l
ow to
high)
2.5
0.4
Detector threshold=2.7V （70°C）
2.3
Detector threshold=3.0V （-40°C）
3.0
0.6
Detector threshold=2.7V （25°C）
Input voltage (V)
Output voltage (V)
0.9
0.0
2.3
0.8
Input voltage (V)
Detector threshold=2.7V （-40°C）
3.0
0.7
Output voltage (V)
0.7
1.0
0.0
0.0
0.5
1.2
0.2
0.2
0
Vin(high to
low)
Vin(low to
high)
1.4
Detector threshold=3.0V （70°C）
Output voltage (V)
Output voltage (V)
1.2
Vin(high to
low)
Vin(low to
high)
1.4
Output voltage (V)
Vin(high to
low)
Vin(low to
high)
1.4
Detector threshold= 0.9V
（ 70°C）
Detector threshold= 0.9V
（ 25°C）
Vin(hig
h to
low)
3.0
2.5
Vin(low
to
high)
2.0
1.5
1.0
0.5
0.0
2.6
2.8
3.0
3.2
Input voltage (V)
6
3.4
2.6
2.8
3.0
3.2
Input voltage (V)
3.4
BL8504
Detector threshold=4.4V （25°C）
2.0
1.0
Output voltage (V)
3.0
Detector threshold=4.4V （70°C）
Vin(hi
gh to
low)
4.0
Output voltage (V)
Vin(hi
gh to
low)
Vin(lo
w to
high)
4.0
Vin(lo
w to
high)
3.0
2.0
1.0
0.0
0.0
4.0
4.2
4.4
4.6
4.8
Vin(hi
gh to
low)
4.0
Vin(lo
w to
high)
3.0
2.0
1.0
0.0
4.0
Input voltage (V)
4.2
4.4
4.6
4.8
4.0
Input voltage(V)
4.2
4.4
4.6
Input voltage (V)
2) Supply current VS. Input voltage
Detector threshold=2.7V
Detector threshold= 0.9V
1.E-05
Supply current (A)
Supply current(A)
1.E-05
1.E-06
-40ºC
1.E-07
25ºC
70ºC
1.E-06
-40ºC
1.E-07
25ºC
70ºC
1.E-08
1.E-08
0
1
2
3
4
5
6
0
1
2
3
4
Input voltage (V)
Input voltage (V)
Detector threshold=3.0V
Detector threshold=4.4V
5
6
1.E-05
Supply current (A)
1.E-05
Supply current(A)
Output voltage (V)
Detector threshold=4.4V （-40°C）
1.E-06
1.E-07
-40ºC
25ºC
1.E-06
1.E-07
-40ºC
25ºC
70ºC
70ºC
1.E-08
1.E-08
0
1
2
3
4
5
6
0
Input voltage (V)
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1
2
3
4
Input voltage (V)
7
5
6
4.8
BL8504
3) Detector Threshold Hysteresis VS. Temperature
Detector threshold= 0.9V
Detector threshold=2.7V
2.78
0.95
Detector threshold(V)
Detector threshold (V)
0.94
0.93
0.92
0.91
0.90
0.89
0.88
2.74
2.70
2.66
2.62
0.87
2.58
0.86
2.54
0.85
-50
-50
-30
-10
10
30
50
70
-30
-10
90
10
30
50
70
90
Temperature(°C)
Temperature (°C)
Detector threshold=4.4V
Detector threshold=3.0V
4.50
4.48
3.02
Detector threshold(V)
Detector threshold(V)
3.04
3.00
2.98
2.96
2.94
2.92
4.46
4.44
4.42
4.40
4.38
4.36
4.34
4.32
2.90
-50
-30
-10
10
30
50
70
4.30
90
-50
Temperature(°C)
-30
-10
10
30
Temperature(°C)
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8
50
70
90
BL8504
4）Driver Output Current VS. VDS
BL8506-09CXX
BL8504CXXTR09N
BL8506-27CXX
BL8504CXXTR27N
8.00E-04
1.20E-02
1.00E-02
6.00E-04
Output current（A)
Output current（A)
7.00E-04
5.00E-04
4.00E-04
3.00E-04
2.00E-04
VDD=0.7V
VDD=0.8V
1.00E-04
0.00E+00
0.00
0.20
0.40
0.60
8.00E-03
6.00E-03
4.00E-03
2.00E-03
0.00E+00
0.00
0.80
VDD=1.0V
VDD=2.0V
0.50
VDS (V)
2.00
2.50
BL8506-44CXX
BL8504CXXTR44N
1.20E-02
2.50E-02
Output current（A)
1.00E-02
Output current（A)
1.50
VDS (V)
BL8506-30CXX
BL8504CXXTR30N
8.00E-03
6.00E-03
4.00E-03
VDD=1.0V
VDD=2.0V
2.00E-03
0.00E+00
0.00
1.00
0.50
1.00
1.50
2.00
1.50E-02
1.00E-02
VDD=1.0V
VDD=2.0V
VDD=3.0V
5.00E-03
0.00E+00
0.00
2.50
VDS (V)
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2.00E-02
1.00
2.00
VDS (V)
9
3.00
4.00
BL8504
5）Driver Output Current vs. Input Voltage
Detector threshold=2.7V
1.E-02
-40ºC
Output Current Iout (A)
Output Current Iout (A)
1.E-02
Detector threshold=3.0V
25ºC
75ºC
8.E-03
4.E-03
0.E+00
-40ºC
25ºC
75ºC
8.E-03
4.E-03
0.E+00
0
1
2
3
0
Input Voltage Vin (V)
1
2
3
Input Voltage Vin (V)
PACKAGE LINE
Package
SOT-23-3
Devices per reel
Package dimension：
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10
3000Pcs
Unit
mm