RT9267 Просмотр технического описания (PDF) - Richtek Technology
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RT9267 Datasheet PDF : 9 Pages
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Preliminary
Function Block Diagram
VDD
LDO O
LFB
FB1
VDD
1st PWM and LDO controlled with CE1
Q2
P MOS
-
0.86V
+
1st PWM converter
-
Loop Control Circuit
1.25V
+
VDD
LX1
Q1
N MOS
R1
EN1
R2
Q3
N MOS
Over Temp.
Detector
Shut Down
LBI
LBO
FB2
2nd PWM and Voltage Detector controlled with CE2
Q2
-
N MOS
+
-
1.25V
+
VDD
0.86V
2nd PWM converter
Loop Control Circuit
Q1
N MOS
R1
EN2
R2
Q3
N MOS
Over Temp.
Detector
Shut Down
LX2
GND
RT9267
Absolute Maximum Ratings
z Supply Voltage ------------------------------------------------------------------------------------------------------ −0.3V to 7V
z LX Pin Switch Voltage --------------------------------------------------------------------------------------------- −0.3V to (VDD + 0.8V)
z LDO Output Voltage ----------------------------------------------------------------------------------------------- −0.3V to (VDD + 0.3V)
z Other I/O Pin Voltages -------------------------------------------------------------------------------------------- −0.3V to (VDD + 0.3V)
z LX Pin Switch Current --------------------------------------------------------------------------------------------- 2.5A
z EXT Pin Driver Current --------------------------------------------------------------------------------------------- 30mA
z LBO Current --------------------------------------------------------------------------------------------------------- 30mA
z Power Dissipation, PD @ TA = 25°C
TSSOP-16 ------------------------------------------------------------------------------------------------------------ 600mW
z Operating Junction Temperature -------------------------------------------------------------------------------- 150°C
z Storage Temperature Range ------------------------------------------------------------------------------------- −65°C to +150°C
DS9267-08 March 2007
www.richtek.com
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