BL8509
Low Voltage Detector with Built-in Delay Circuit
Outline:
BL8509 is a series of high precision voltage
detector with ultra low current consumption
(500nA typ. at Vdd=3.0V) and a built-in delay
circuit. It can work at very low voltage, which
makes it perfect for system reset.
BL8509 is composed of high precision
voltage reference, comparator, delay circuit,
output driver and resistor array. Internally preset
detect voltage has a low temperature drift and
requires no external trimming.
Two type of output, CMOS and N-channel
open-drain are available.
BL8509 is available in SOT-23 which is Pb
free.
Features
High-precision detection Voltage
Detection Voltage
2%
0.9V~6.0V (in 0.1V steps)
Built-in Power on Reset Delay Time
circuit::Refer to Selection Guide
Operating Voltage range
0.7V~10V
500nA typ. (at
Ultra-low current consumption
V
DD
3.0V)
Two Output forms CMOS and N-channel
open-drain (Active Low)
Application
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
http://www.belling.com.cn
- 1-
Total 17 Pages
8/8/2006
BL8509
Block diagram:
N channel open-drain
Absolute Maximum Ratings
CMOS output
Input Voltage range -------------------------------------------------------------------------------------0.3V~12V
Output Voltage range-----------------------------------------------------------------------------------0.3V~12V
Maximum Output current -----------------------------------------------------------------------------70mA
Maximum power dissipation -------------------------------------------------------------------------150mW
Ambient temperature ---------------------------------------------------------------------------------- -40~+70 C
Storage temperature----------------------------------------------------------------------------------- -40~125 C
Lead temperature and time --------------------------------------------------------------------------260 C,10S
Recommended Work Conditions
Item
Input Voltage range
Ambient temperature
Min
0.7
-40
Recommended
25
Max
10
70
unit
V
Electrical Characteristics
BL8509-090DNRM
Symbol
-V
DET
I
SS
V
DDH
V
DDL
0.9V
Conditions
V
DD
=2.9V
(Topt
25
,Unless otherwise specified.)
Unit
V
uA
V
V
mA
mA
Parameter
Detector Threshold
Current consumption
Maximum operating
voltage
Minimum Operating
voltage
Reference data
Min.
Typ.
Max.
0.882
0.9
0.918
1
1.5
10
0.5
I
OUT
Output current
Nch
V
DS
=0.05V V
DD
=0.7V
V
DS
=0.50V V
DD
=0.8V
Pch
V
DS
=-2.1V V
DD
=4.50V
0.01
0.05
1.0
0.05
0.50
2.0
http://www.belling.com.cn
- 3-
Total 17 Pages
8/8/2006
BL8509
BL8509-270DNRM
Symbol
-V
DET
I
SS
V
DDH
V
DDL
2.7V
Conditions
V
DD
=4.7V
(Topt
25
,Unless otherwise specified.)
Unit
V
uA
V
V
mA
0.01
0.05
mA
1.0
(Topt
Conditions
V
DD
=5.0V
25
2.0
Parameter
Detector Threshold
Current consumption
Maximum operating
voltage
Minimum Operating
voltage
Reference data
Min.
Typ.
Max.
2.646
2.7
2.754
0.5
1
10
0.5
Nch
V
DS
=0.05V
V
DD
=0.70V
Pch
V
DS
=-2.1V
V
DD
=4.50V
I
OUT
Output current
BL8509-300DNRM
Symbol
-V
DET
I
SS
V
DDH
V
DDL
3.0V
,Unless otherwise specified.)
Unit
V
uA
V
V
mA
Parameter
Detector Threshold
Current consumption
Maximum operating
voltage
Minimum Operating
voltage
Reference data
Min.
Typ.
Max.
2.94
3.0
3.06
0.5
1
10
0.5
I
OUT
Output current
Nch
V
DS
=0.05V
Pch
V
DS
=-2.1V
V
DD
=0.7V
V
DD
=4.50V
(Topt
0.01
1.0
25
0.05
2.0
mA
BL8509-340DNRM
Symbol
-V
DET
I
SS
V
DDH
V
DDL
3.4V
Conditions
V
DD
=5.0V
,Unless otherwise specified.)
Unit
V
uA
V
V
mA
Parameter
Detector Threshold
Current consumption
Maximum operating
voltage
Minimum Operating
voltage
Reference data
Min.
Typ.
Max.
3.332
3.4
3.468
0.5
1
10
0.5
I
OUT
Output current
Nch
V
DS
=0.05V
Pch
V
DS
=-2.1V
V
DD
=0.7V
V
DD
=4.50V
0.01
1.0
0.05
2.0
mA
http://www.belling.com.cn
- 4-
Total 17 Pages
8/8/2006
PCB Design
京公网安备 11010802033920号
EEWORLD
