RT9262AGS RICHTEK [Richtek Technology Corporation], RT9262AGS Datasheet - Page 4

• Manufacturer Part Number: RT9262AGS
• Description: High Efficiency, Low Supply Current, Step-up DC/DC Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9262/A
www.richtek.com
4
Function Block Diagram
Functional Pin Description
RT9262
--
--
1
2
3
4
5
6
7
8
Pin No.
RT9262A
--
--
1
2
3
4
5
6
7
8
LDO O
VDD
LFB
EN
FB
Pin Name
GND
EXT
LFB
LDOO
LBO
LBI
FB
VDD
LX
EN
Q2
P MOS
VDD
1.25V
Ground
Output Pin for Driving External NMOS or NPN
When driving an NPN, a resistor should be added for limiting base current.
Feedback Pin of the Built-in LDO (Internal Vref = 0.86V)
Voltage Output Pin of the Built-in LDO
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.
Input Pin of the Built-in Low Voltage Detector
Trip point = 0.86V
Feedback Input Pin
Internal reference voltage for the error amplifier is 1.25V.
Input Positive Power Pin of RT9262/A
Pin for Switching
Chip Enable Pin (Active High).
Pin Function
VDD
Q3
N MOS
R2
-
+
-
+
Preliminary
Over Temp.
Detector
0.86V
Loop Control Circuit
RT9262
Shut Down
Q1
N MOS
R1
DS9262/A-11 March 2007
EXT
LX
GND