RT9262CS 查看數據表（PDF） - Richtek Technology
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RT9262CS Datasheet PDF : 10 Pages
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RT9262/A
Preliminary
Functional Pin Description
Pin No.
Pin Name
RT9262 RT9262A
Pin Function
1
1
GND
Ground
2
2
EXT
Output Pin for Driving External NMOS or NPN
When driving an NPN, a resistor should be added for limiting base current.
3
--
LFB
Feedback Pin of the Built-in LDO (Internal Vref = 0.86V)
4
--
LDOO
Voltage Output Pin of the Built-in LDO
Drain Output Pin of the NMOS of the Built-in Low Voltage Detector
--
3
LBO
This pin will be internally pulled low when the voltage at LBI pin drops to
below 0.86V.
--
4
LBI
Input Pin of the Built-in Low Voltage Detector
Trip point = 0.86V
5
5
FB
Feedback Input Pin
Internal reference voltage for the error amplifier is 1.25V.
6
6
VDD
Input Positive Power Pin of RT9262/A
7
7
LX
Pin for Switching
8
8
EN
Chip Enable Pin (Active High).
Function Block Diagram
VDD
LDO O
LFB
FB
VDD
Q2
-
P MOS
+
-
1.25V
+
VDD
RT9262
0.86V
Loop Control Circuit
Q1
N MOS
R1
R2
Shut Down
EN
Q3
N MOS Over Temp.
Detector
EXT
LX
GND
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DS9262/A-11 March 2007
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