RT9027A/B
Functional Pin Description
Pin No.
1
2
Pin Name
Pin Function
FON
EN
Internal pulled high. For RT9027A, the IC will be fully turned on when this pin’s voltage is
below 0.4V.
Internal pulled high. For RT9027B, the IC will be shutdown when this pin’s voltage is
below 0.4V.
VIN
Input Voltage Pin.
3 VOUT
4 VSET
5 to 8 GND
Output Voltage Pin.
This pin is used for output voltage setting. It is necessary to make this pin higher than 1V
to guarantee VOUT to be 1.6 times of VSET. The IC will be shutdown when this pin voltage
is below 1V.
Ground.
Function Block Diagram
VIN
VSET
FON/EN
GND
VIN POR
BIAS+Thermal
Shutdown
Logic
VSET POR
(Enable)
-
EA
+
OCP
0.6
1
VOUT
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2
Downloaded from Elcodis.com electronic components distributor
DS9027A/B-01 October 2008
Free Datasheet http://www.Datasheet-PDF.com/