RT9568(2001) View Datasheet(PDF) - Richtek Technology
Part Name
Description
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RT9568 Datasheet PDF : 6 Pages
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RT9568
PSM DC-to-DC Controller
General Description
The RT9568 is a DC-to-DC controller IC for step-
down (Buck), step-up (Boost), inverting (Buck-
Boost), and Flyback converters.
The device consists of an internal temperature
compensated reference, comparator, controlled duty
cycle oscillator with an active current limit circuit,
driver, and high current output switch.
Ordering Information
RT9568
Package type
N : DIP-8
S : SOP-8
Operating temperature range
C: Commercial standard
Marking Information
Part Number
Marking
RT9568CN
RT9568CN
RT9568CS
RT9568CS
Features
• Pluse-Skipping Modulation
• Precision ±2% Reference
• Operation from 3.0V to 30V Input
• Internal Switch Peak Current to 1.5A
• Design Flexibility
• Output Voltage Adjustable
• Current Limiting Adjustable
• Frequency Adjustable up to 200KHz
Applications
z DC-DC Converter Module
Pin Configurations
Part Number
RT9568CN
(Plastic DIP-8)
Pin Configurations
TOP VIEW
SE 1
OSC 2
8 SC
7 DRI
RT9568CS
(Plastic SOP-8)
GND 3
FB 4
6 ICL
5 VCC
Typical Application Circuit
8
7
6
Rsc
0.33
VIN
5
10V~30V CIN +
100µF
Q1
Q2
100
Q
S
R
L
1
100µH
D1
1N5819
2
CT
220pF
VOUT
+ 5.0V/500mA
Co
470µF
Oscillator
&
3
Current Limit
Comparator
_
4
R2
3.6K
1.25V
R1
1.2K
DS9568-02 May 2001
Step-down Cinverter use Internal Switch
www.richtek-ic.com.tw
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