DC-to-DC Controller RT9568 DC-to-DC controller stepdown (Buck), s

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DC-to-DC Controller RT9568 DC-to-DC controller stepdown (Buck), s

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RT9568
DC-to-DC Controller
RT9568 DC-to-DC controller stepdown (Buck), step-up (Boost), inverting (BuckBoost), Flyback converters. device consists internal temperature compensated reference, comparator, controlled duty cycle oscillator with active current limit circuit, driver, high current output switch.
Features
Pluse-Skipping Modulation Precision Reference Operation from 3.0V Input Internal Switch Peak Current 1.5A Design Flexibility Output Voltage Adjustable Current Limiting Adjustable Frequency Adjustable 200KHz
Ordering Information
RT9568 Package type DIP-8 SOP-8 Operating temperature range Commercial standard
Applications
DC-DC Converter Module
Configurations
Part Number RT9568CN (Plastic DIP-8) Configurations
VIEW
Marking Information
Part Number RT9568CN RT9568CS Marking RT9568CN RT9568CS RT9568CS (Plastic SOP-8)
Typical Application Circuit
Oscillator Current Limit 100µH 1N5819 220pF 3.6K VOUT 5.0V/500mA 470µF
0.33 10V~30V 100µF
Comparator 1.25V 1.2K
Step-down Cinverter Internal Switch
DS9568-02 2001
www.richtek-ic.com.tw
RT9568
Absolute Maximum Ratings
Power Supply Voltage Feedback Input Voltage Range Switch Collector Voltage Switch Emitter Voltage(VPIN8 30V) Switch Collector Emitter Voltage Driver Collector Voltage Driver Collector Current (see Note Switch Current Power Dissipation, 25°C DIP-8 SOP-8 Package Thermal Resistance DIP-8, SOP-8, Operating Junction Temperature Range Storage Temperature Range Note: 1.Maximum package power dissipation limits must observed. 100°C/W 160°C/W 125°C 150°C 1.25W 0.625W 0.3V 100mA 1.5A
Electrical Characteristics
(VCC 25°C, unless otherwise specified) Parameter Symbol Test Conditions 5.0V 30V, 1.0nF, Pin6 VCC, Vpin4 Vref, Pin1 GND, Remaining pins open ICHG IDISCHG 5.0V 5.0V Pin6 1.0A, Pins connected 1.0A, RPIN7 Forced 1.0A, 5.0V VREF 3.0V IBIAS Units
Supply Current
Current Limit Sense Voltage Charge Current Discharge Current Discharge Charge Current Ratio Saturation Voltage, Darlington Connection
VLIMIT ICHG IDISCHG
Saturation Voltage, Darlington Connection Current Gain Collector Off-state Current Reference Voltage Reference Voltage Line Regulation Input Bias Current
-1.225
0.01 1.25
-100 1.275 -400
www.richtek-ic.com.tw
DS9568-02 2001
RT9568
Function Block Diagram
Oscillator Current Limit Comparator 1.25V
Description
Name Function Darlington Switch Emitter Oscillator Timing Capacitor Ground Feedback Input Power Supply Input Current Limit Voltage Input Driver Collector Collector Darlington Transistor
DS9568-02 2001
www.richtek-ic.com.tw
RT9568
Package Information
Symbol
Dimensions Millimeters 9.068 6.198 -0.356 1.397 2.337 3.048 7.366 0.381 9.627 6.604 4.318 0.559 1.651 2.743 3.556 8.255
Dimensions Inches 0.357 0.244 -0.014 0.055 0.092 0.120 0.290 0.015 0.379 0.260 0.170 0.022 0.065 0.108 0.140 0.325
8-Lead Plastic Package
www.richtek-ic.com.tw
DS9568-02 2001
RT9568
Symbol
Dimensions Millimeters 4.801 3.810 1.346 0.330 1.194 0.178 0.102 5.791 0.406 5.004 3.988 1.753 0.508 1.346 0.254 0.254 6.198 1.270
Dimensions Inches 0.189 0.150 0.053 0.013 0.047 0.007 0.004 0.228 0.016 0.197 0.157 0.069 0.020 0.053 0.010 0.010 0.244 0.050
8-Lead Plastic Package
DS9568-02 2001
www.richtek-ic.com.tw
RT9568
RICHTEK TECHNOLOGY CORP.
Headquarter
Hsintai Road, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
8F-1, 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek-ic.com.tw
www.richtek-ic.com.tw
DS9568-02 2001

DC-to-DC Controller RT9568 DC-to-DC controller stepdown (Buck), s

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