Low-Dropout, Dual Output, Regulator Designed meet high-current re

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Low-Dropout, Dual Output, Regulator Designed meet high-current re

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SI-3003KWD
Low-Dropout, Dual Output, Regulator
Designed meet high-current requirements industrial consumer applications; embedded core, memory, logic supplies; TVs, VCRs, office equipment, SI-3003KWD voltage regulator offers reduced dropout voltage quiescent current essential improved efficiency. This device delivers dual regulated outputs Integrated thermal overcurrent protection enhance overall system reliability. Devices with other output voltages also available. Quiescent current does increase significantly dropout voltage approached, ideal feature standby/resume power systems where data integrity crucial. Regulator accuracy excellent temperature characteristics provided bandgap reference. LS-TTL/CMOS-compatible input gives designer complete control over power standby, power down. pass element provides dropout voltage less than load current. output voltages eliminate need expensive buck converters. dropout voltage permits more efficient regulation before output regulation lost. This device supplied 5-lead surface-mount plastic package (TO-263) with ground provide low-resistance path maximum heat dissipation. similar device flange-mounted (TO-220-style) high-power package SI-3003KWF. FEATURES Output Current Channel Maximum Dropout Voltage Fast Transient Response Maximum Standby Current Foldback Current Limiting Ground Superior Heat Dissipation Thermal Protection APPLICATIONS TVs, VCRs, Electronic Games Embedded Core, Memory, Logic Supplies Printers Other Office Equipment Industrial Machinery Secondary-Side Stabilization Multi-Output SMPS
Data Sheet 27468.311
ABSOLUTE MAXIMUM RATINGS
Input Voltage,
Output Current, Enable Input Voltage, Junction Temperature, +125°C Storage Temperature Range, -40°C +125°C Output current rating limited input voltage, duty cycle, ambient temperature. Under conditions, exceed junction temperature +125°C.
Always order complete part number, e.g., SI-3003KWD-TL where "-TL" indicates tape reel.
Sanken Power Devices from Allegro MicroSystems
SI-3003KWD Low-Dropout, Dual Output, Regulator
FUNCTIONAL BLOCK DIAGRAM
Allowable Package Power Dissipation
Recommended Operating Conditions
+100 Units
Output Current Operating Ambient Temp. Operating Junction Temp.
This data sheet based Sanken data sheet SSJ-02009A.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 Copyright 2004 Allegro MicroSystems, Inc.
tors
SI-3003KWD Low-Dropout, Dual Output, Regulator
ELECTRICAL CHARACTERISTICS +25°C, (unless otherwise noted).
Limits Characteristic Channel Output Voltage VO1(off) Output Volt. Temp. Coeff. Output Short-Circuit Current Line Regulation Load Regulation Dropout Voltage Ripple Rejection Ratio Channel Output Voltage VO2(off) Output Volt. Temp. Coeff. Output Short-Circuit Current Line Regulation Load Regulation Dropout Voltage Ripple Rejection Ratio Logic Ground Terminal Current IGND Enable Input Voltage Enable Input Current Thermal Shutdown Output Output -100 100°C note 1.764 1.800 1.836 ±0.3 mV/°C 100°C note 2.450 2.500 2.550 ±0.3 mV/°C Symbol Test Conditions Min. Typ. Max. Units
aVO1
IOM1 VO(VI)1 VO(IO)1 VImin PSRR
aVO2
IOM2 VO(VI)2 VO(IO)2 VImin PSRR
Typical values given circuit design information only. Note: Output short-circuit current point where output voltage decreased
www.allegromicro.com
SI-3003KWD Low-Dropout, Dual Output, Regulator
TYPICAL CHARACTERISTICS
25°C) Chan. Dropout Voltage Chan. Low-Voltage Behavior
Chan. Overcurrent Protection
Chan. Line Regulation
Chan. Load Regulation
Chan. Transient Response
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036
tors
25°C) Chan. Low-Voltage Behavior
SI-3003KWD Low-Dropout, Dual Output, Regulator
TYPICAL CHARACTERISTICS (cont.)
Chan. Overcurrent Protection
Chan. Line Regulation
Chan. Load Regulation
Chan. Transient Response
ENABLE Control Voltage
ENABLE Control Current
Thermal Protection
www.allegromicro.com
SI-3003KWD Low-Dropout, Dual Output, Regulator
APPLICATIONS INFORMATION
Input Capacitor (CI, µF). This necessary either when input line includes inductance when wiring long. Output Capacitor (CO, µF). This device designed with very output capacitor such ceramic capacitor. Output oscillation occur with that kind capacitor. ENABLE Input. ENABLE (control) input features internal pull-up resistor. Leaving this input open causes output turn Parallel Operation. Parallel operation increase load current permitted. Determination Input Voltage. minimum input voltage VI(min) should higher than fixed output voltage maximum rated dropout voltage. Overcurrent Protection. SI-3000KWD series built-in fold-back type overcurrent protection circuit, which limits output current start-up mode. thus cannot used applications that require current start-up mode such constant-current load, power supply with positive negative outputs common load center-tap type power supply), raising output voltage putting diode resistor between device ground system ground. Thermal Protection. Circuitry turns pass transistor when junction temperature rises above 135°C. intended only protect device from failures excessive junction temperatures should imply that output short circuits continuous overloads permitted.
Heat Radiation Reliability. reliability directly related junction temperature (TJ) operation. Accordingly, careful consideration should given heat dissipation. inner frame which integrated circuit mounted connected terminal (pin Therefore, very effective heat radiation enlarge copper area that connected terminal. graph illustrates effect copper area junction-toambient thermal resistance (RJA). junction temperature (TJ) determined from either following equations: RJA) RJT) where IO1(VI VO1) IO2(VI VO2) 3°C/W.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036
tors
Dimensions Millimeters
Temperature (TT) Measured Here
SI-3003KWD Low-Dropout, Dual Output, Regulator
Recommended Land Pattern
Notes:
Dimensions include mold protrusions. reference. assembly quality. Heat sink side flash: max. Terminal finish: pure (category Product weight: approximately 1.48
www.allegromicro.com
SI-3003KWD Low-Dropout, Dual Output, Regulator
Tape Reel Dimensions Millimeters
Tape Specifications
Material: conductive polystyrene. Allowable camber: mm/100 maximum. (10.6 (15.7 measured plane above bottom pocket. (4.9 measured from plane inside bottom pocket surface carrier. pitches cumulative tolerance tape ±0.2 space between parts cavity must exceed ±0.3 from normal position direction. Surface resistivity embossment: ohm/cm2 max.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036
tors
SI-3003KWD Low-Dropout, Dual Output, Regulator
products described herein manufactured Japan Sanken Electric Co., Ltd. sale Allegro MicroSystems, Inc. Sanken Allegro reserve right make, from time time, such departures from detail specifications required permit improvements performance, reliability, manufacturability products. Therefore, user cautioned verify that information this publication current before placing order. When using products described herein, applicability suitability such products intended purpose shall reviewed users responsibility. Although Sanken undertakes enhance quality reliability products, occurrence failure defect semiconductor products certain rate inevitable. Users Sanken products requested take, their risk, preventative measures including safety design equipment systems against possible injury, death, fires damages society device failure malfunction. Sanken products listed this publication designed intended components general-purpose electronic equipment apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Their application requiring radiation hardness assurance (e.g., aerospace equipment) supported. When considering Sanken products applications where higher reliability required (transportation equipment control systems equipment, fire- burglar-alarm systems, various safety devices, etc.), contact company sales representative discuss obtain written confirmation your specifications. Sanken products without written consent Sanken applications where extremely high reliability required (aerospace equipment, nuclear power-control stations, life-support systems, etc.) strictly prohibited. information included herein believed accurate reliable. Application operation examples described this publication given reference only Sanken Allegro assume responsibility infringement industrial property rights, intellectual property rights, other rights Sanken Allegro third party that result from use.
www.allegromicro.com

Low-Dropout, Dual Output, Regulator Designed meet high-current re

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