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PDF RT9726 Data sheet ( Hoja de datos )
| Número de pieza | RT9726 | |
| Descripción | High-Voltage Hysteresis Selectable Temperature Switch | |
| Fabricantes | RichTek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9726 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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RT9726
High-Voltage Hysteresis Selectable Temperature Switch
General Description
The RT9726 is a temperature switch with wide input voltage
range. The over-temperature threshold point is generated
by a negative temperature coefficient (NTC) thermistor and
a setting resistor. The RT9726 provides an active-low, open-
drain logic output. OT goes LOW when the NTC pin voltage
is lower than 50% of the REF voltage threshold. The
RT9726 provides the selectable hysteresis mode that can
be set by the EN pin Input voltage. The IC is available in
SC-70-6 package.
Ordering Information
RT9726
Package Type
U6 : SC-70-6
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
Features
z Wide Input Voltage Range : 4.75V to 25V
z 0.5μA Shutdown Current
z 2 Selectable Hysteresis Threshold
z Reference Output for Thermal Threshold Setting
z Open-drain Logic Output
z RoHS Compliant and Halogen Free
Applications
z Notebook Temperature Monitoring
z Microprocessor Thermal Management
z Temperature Control
z Fan Control
z Electronic System Protection
Pin Configurations
(TOP VIEW)
EN REF OT
65 4
23
VIN GND NTC
SC-70-6
A1=W
A1= : Product Code
W : Date code
Typical Application Circuit
5V
100k
VIN
4.75V to 25V
Chip Enable
3.3V
1 VIN
OT 4
C1
0.1µF
6
RT9726
REF 5
EN
2 GND
NTC 3
System
SHDN#
R1
570
Thermistor
ß = 4250
System shutdown switch @ Temp = 100°C
10k
for default hysteresis 30°C
DS9726-01 April 2011
Downloaded from Elcodis.com electronic components distributor
www.richtek.com
1
1 page  
Typical Operating Characteristics
Quiescent Current vs. Input Voltage
105
104
103
102
101
VEN = 5V, No Load
100
5 7 9 11 13 15 17 19 21 23 25
Input Voltage (V)
Start Up from EN
RT9726
Shutdown Current vs. Input Voltage
0.60
0.55
0.50
0.45
VEN = 0V, No Load
0.40
5 7 9 11 13 15 17 19 21 23 25
Input Voltage (V)
Over Temperature Recovery Threshold
VEN
(5V/Div)
VREF
(2V/Div)
OT
(5V/Div)
VNTC
(1V/Div)
VIN = OT = 5V, CIN = 0.1μF
Time (5ms/Div)
VEN
(2V/Div)
VREF
(5V/Div)
OT
(5V/Div)
VNTC
(1V/Div)
VEN = 1.8V, VIN = OT = 5V, CIN = 0.1μF
Time (1ms/Div)
Over Temperature Recovery Threshold
VEN
(5V/Div)
VREF
(5V/Div)
OT
(5V/Div)
VNTC
(1V/Div)
VEN = 3.3V, VIN = OT = 5V, CIN = 0.1μF
Time (1ms/Div)
DS9726-01 April 2011
Downloaded from Elcodis.com electronic components distributor
www.richtek.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet RT9726.PDF ] | |
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