RT9267 RICHTEK [Richtek Technology Corporation], RT9267 Datasheet - Page 3

• Manufacturer Part Number: RT9267
• Description: High Efficiency, Low Quiescent, Triple Output DC-DC Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Function Block Diagram
Absolute Maximum Ratings
DS9267-08 March 2007
Supply Voltage ------------------------------------------------------------------------------------------------------
LX Pin Switch Voltage ---------------------------------------------------------------------------------------------
LDO Output Voltage -----------------------------------------------------------------------------------------------
Other I/O Pin Voltages --------------------------------------------------------------------------------------------
LX Pin Switch Current --------------------------------------------------------------------------------------------- 2.5A
EXT Pin Driver Current --------------------------------------------------------------------------------------------- 30mA
LBO Current --------------------------------------------------------------------------------------------------------- 30mA
Power Dissipation, P
TSSOP-16 ------------------------------------------------------------------------------------------------------------ 600mW
Operating Junction Temperature -------------------------------------------------------------------------------- 150°C
Storage Temperature Range -------------------------------------------------------------------------------------
D
@ T
LDO O
VDD
EN1
LFB
FB1
LBO
EN2
FB2
LBI
A
= 25°C
Q2
P MOS
Q2
N MOS
VDD
2
1.25V
1.25V
nd
VDD
PWM and Voltage Detector controlled with CE2
VDD
1
Q3
N MOS
R2
Q3
N MOS
st
R2
PWM and LDO controlled with CE1
-
+
-
+
-
+
-
+
Preliminary
Over Temp.
Over Temp.
Detector
Detector
0.86V
0.86V
Loop Control Circuit
Loop Control Circuit
1
st
2
nd
PWM converter
PWM converter
Shut Down
Shut Down
Q1
N MOS
Q1
N MOS
R1
R1
LX1
LX2
GND
−
−
−
−
−
0.3V to 7V
0.3V to (V
0.3V to (V
0.3V to (V
65°C to +150°C
RT9267
www.richtek.com
DD
DD
DD
+ 0.8V)
+ 0.3V)
+ 0.3V)
3