GS2TX-9A Datasheet, PDF (1/2 Pages) STMicroelectronics – 2 W LAN DC-DC CONVERTER

GS2TX-9A
2 W LAN DC-DC CONVERTER
Type
GS2TX-9A
V_i
4,5 to 15,75 V
V_o
–9V
I_o
– 250 mA
DESCRIPTION
The GS2TX-9A is a 2.25W unregulated DC-DC
converter designed to provide power, voltage regu-
lation and isolation for Local Area Network
(CHEAPERNET and ETHERNET) transceivers
from a wide range of input voltage, according to
IEEE 802.3 Standard.
An internal network is added to guarantee soft start
at switch-on.
ELECTRICAL CHARACTERISTICS (Tamb.= 25° C unless otherwise specified)
Symbol
Parameter
Vi Input Voltage
Iir
Input Reflected
Current
lir
Input Reflected
Current
Vo Output Voltage
Vor
Vor
δVOL
δVOO
Io
Vis
η
η
Top
Tstg
Output Ripple
Voltage
Output Ripple
Voltage
Line Regulation
Load Regulation
Output Current*
Isolation Voltage
Efficiency
Efficiency
Operating Ambient
Temperature Range
Storage Temperature
Range
Test Conditions
Vo = 9V
Io = 0 to – 250mA
Vi = 5V
Vo = – 9V
Io = – 250mA
Vi = 12V
Vo = – 9V
Io = – 250mA
Vi = 4.5 to 15.75V
Io = 0 to – 250mA
Vi = 5V
Io = – 250mA
Min Typ Max Unit
4.5
15.75 V
25
30 mApp
2
5 mApp
– 8.55 – 9.00 – 9.45 V
7
10 mVRMS
Vi = 12V
Io = – 250mA
2
5 mVRMS
Vi = 4.5 to 5.5V
Io = – 250mA
5
mV
Vi = 4.5 to 15.75V Io = – 20 to – 250mA
5
mV
Vi = 4.5 to 15.75V Vo = – 9V
0
– 250 mA
2500
VDC
Vi = 5V Io = – 250mA
70
73
%
Vi = 12V Io = – 250mA
75
80
%
0
+70 °C
– 40
+85 °C
* When the input voltage is <5V and the output current is less than 20mA, the output ripple voltage increases due to discontinuous operation.
April 1997
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