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PDF BL8504 Data sheet ( Hoja de datos )
| Número de pieza | BL8504 | |
| Descripción | High-Precision Low Voltage Detector | |
| Fabricantes | BELLING | |
| Logotipo |  |
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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
BL8504
ELECTRICAL CHARACTERISTICS
Detector threshold= 0.9V
1. E-05
1. E-06
1. E-07
1. E-08
0
-40 ºC
2 5ºC
7 0ºC
12345
Input voltage (V)
6
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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
BL8504
No. Operation status
I VDD>-VDET
II VDD drops below - VDET
III VDD drops further below
VDDL
IV VDD rises above VDDL
V 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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5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet BL8504.PDF ] | |
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