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RT8059 Datasheet(PDF) 2 Page - Richtek Technology Corporation

Part # RT8059
Description  1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter
PDF  10 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8059 Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT8059
2
DS8059-04 December 2011
www.richtek.com
Copyright 2011 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
©
Typical Application Circuit
⎟
⎠
⎞
⎜
⎝
⎛ +
=
R2
R1
1
x
V
V
REF
OUT
with R2 = 60k
Ω 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.
Pin Name
Pin Function
1
EN
Chip Enable (Active High). Do not leave the EN pin floating.
2
GND
Ground.
3
LX
Switch Node.
4
VIN
Power Input.
5
FB
Feedback Input Pin.
Function Block Diagram
4.7µF
10µF
VIN
LX
GND
RT8059
EN
FB
2.2µH
2.8V to 5.5V
VIN
VOUT
CIN
L
5
3
4
1
2
COUT
R1
R2
C1
IR2
COMP
RC
RS1
RS2
EN
VIN
LX
FB
UVLO
VREF
Slope
Compensation
Current
Sense
OSC &
Shutdown
Control
Zero
Detector
Current
Limit
Detector
Driver
Control
Logic
GND
Error
Amplifier
PWM
Comparator



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