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RT9262GS Datasheet(PDF) 4 Page - Richtek Technology Corporation |
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RT9262GS Datasheet(HTML) 4 Page - Richtek Technology Corporation |
4 / 10 page RT9262/A Preliminary 4 DS9262/A-11 March 2007 www.richtek.com Functional Pin Description Function Block Diagram Pin No. RT9262 RT9262A Pin Name 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 -- 3 LBO Drain Output Pin of the NMOS of the Built-in Low Voltage Detector 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). + - + - Loop Control Circuit 0.86V Q2 P MOS 1.25V VDD R2 Q3 N MOS EN LFB LDO O FB Q1 N MOS R1 EXT LX GND Shut Down Over Temp. Detector VDD RT9262 VDD |
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