RT8010B 데이터 시트보기 (PDF) - Richtek Technology
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RT8010B Datasheet PDF : 12 Pages
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RT8010B
Preliminary
Typical Application Circuit
VIN
2.5V to 4V
VOUT
=
VREF
x ⎜⎝⎛1+
R1
R2
⎟⎠⎞
L
3 VIN
2.2uH
LX 4
VOUT
CIN
4.7uF
RT8010B
1 EN
FB 2
C1 R1
COUT
IR2
R2 10uF
6, 7, 8 PGND AGND 5
with R2 = 75kΩ to 200kΩ,
and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection.
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
EN
Chip Enable (Active High).
2
FB
Feedback Pin.
3
VIN
Power Input.
4
LX
Pin for Switching.
5
AGND
Analog Ground.
6, 7, 8
PGND
Power Ground.
Exposed Pad (9) NC
No Internal Connection.
Function Block Diagram
EN
Slope
Compensation
OSC &
Shutdown
Control
Current
Sense
PWM
FB
Error
Comparator
Amplifier
RC
Current
Limit
Detector
Control
Logic
COMP
UVLO &
Power Good
Detector
VREF
Driver
VIN
RS1
LX
RS2
PGND
AGND
www.richtek.com
2
DS8010B-00 July 2007
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