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RT9179PB Datasheet(PDF) 2 Page - Richtek Technology Corporation

Part # RT9179PB
Description  Adjustable, 300mA LDO Regulator with Enable
PDF  10 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9179PB Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT9179
2
DS9179-09 April 2008
www.richtek.com
Function Block Diagram
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
VIN
Power Input Voltage
2
GND
Ground
3
EN
Chip Enable (Active High)
4
ADJ
Adjust Output Voltage. The output voltage is set by the internal feedback resistors when
this pin grounded. If external feedback resistors are applied, the output voltage will be:
VOUT = 1.175 × (1 +
) Volts
5
VOUT
Output Voltage
2
1
R
R
Current-Limit
and
Thermal Protection
MOS
Driver
VOUT
Shutdown
and
Logic Control
VIN
Error
Amplifier
1.175V
V
REF
ADJ
EN
GND
Thermal
SHDN
+_
Typical Application Circuit
2
1
R
R
1
+
Adjustable Operation
Note: The external feedback resistors are in hundreds of OHM to hundreds of kOHM ranges.
V
OUT = 1.175 x (
) Volts
VIN
VOUT
ADJ
EN
RT9179
C2
1uF
1uF
0.1uF
R2
R1
VOUT
VIN
C1
C3
GND
Chip Enable



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