RT8059 Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT8059 Datasheet PDF : 10 Pages
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RT8059
Typical Application Circuit
VIN
2.8V to 5.5V
4 VIN
LX 3
CIN
4.7µF
RT8059
1 EN
FB 5
GND
2
L
2.2µH
C1
R1
IR2
R2
VOUT
COUT
10µF
VOUT = VREF x ⎜⎛1+ R1 ⎟⎞
⎝ R2 ⎠
with R2 = 60kΩ to 300kΩ , IR2 = 2μA to 10μA,
and (R1 x C1) should be in the range between 3x10−6 and 6x10−6 for component selection.
Functional Pin Description
Pin No.
1
2
3
4
5
Pin Name
EN
GND
LX
VIN
FB
Pin Function
Chip Enable (Active High). Do not leave the EN pin floating.
Ground.
Switch Node.
Power Input.
Feedback Input Pin.
Function Block Diagram
EN
Slope
Compensation
OSC &
Shutdown
Control
Current
Sense
Current
Limit
Detector
PWM
FB
Error
Comparator
Amplifier
Control
Logic
RC
COMP
UVLO
Zero
Detector
VREF
Driver
VIN
RS1
LX
RS2
GND
Copyright ©2011 Richtek Technology Corporation. All rights reserved.
www.richtek.com
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is a registered trademark of Richtek Technology Corporation.
DS8059-04 December 2011
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