5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS CONTROLLER 200mA ON-BOARD

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5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS CONTROLLER 200mA ON-BOARD

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IRU3018
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS CONTROLLER 200mA ON-BOARD
Provides single chip solution Vcore, GTL+ clock supply 200mA on-board regulator Designed meet latest Intel specification Pentium IIOn-board programs output voltage from 1.3V 3.5V Linear regulator controller board 1.5V GTL+ supply Loss-less short circuit protection with HICCUP Synchronous operation allows maximum efficiency patented architecture allows fixed frequency operation well 100% duty cycle during dynamic load Soft start High current totem pole driver direct driving external power MOSFET Power Good function monitors outputs OVER VOLTAGE PROTECTION circuitry protects switcher output generates fault signal Thermal shutdown Logic level enable input
DESCRIPTION
IRU3018 controller specifically designed meet Intel specification Pentium IImicroprocessor applications well next generation family processors. IRU3018 provides single chip controller Vcore, controller GTL+ internal 200mA regulator clock supply which required Pentium applications. These devices feature patented topology that combination with external components shown typical application circuit, will provide excess output current onboard DC-DC converter while automatically providing right output voltage 5-bit internal DAC. IRU3018 also features loss-less current sensing both switchers using RDS(on) high-side power MOSFET sensing resistor, internal current limiting clock supply, Power Good window comparator that switches open collector output when outputs outside pre-programmed window. Other features device are: Undervoltage lockout both supplies, external programmable soft start function, programming oscillator frequency external resistor, over-voltage protection circuitry both switcher outputs internal thermal shutdown.
APPLICATIONS
Total Power Solution Pentium processor application
TYPICAL APPLICATION
IRU3018
SWITCHER1 CONTROL
Vout1
3.3V LINEAR CONTROL LINEAR REGULATOR
3018app3-1.1
Vout2
Vout3
Notes: Pentium trademark Intel Corp
PACKAGE ORDER INFORMATION
(°C)
Rev. 12/8/00
Device IRU3018CW
Package 24-pin Plastic SOIC
4-45
IRU3018
ABSOLUTE MAXIMUM RATINGS
supply Voltage Supply Voltage Storage Temperature Range Operating Junction Temperature Range 150° 125°
PACKAGE INFORMATION
24-PIN WIDE BODY PLASTIC SOIC
VIEW
VID4 VID3 VID2 VID1 VID0 PGood Fault Vin2
UGate1 Phase1 LGate1 PGnd OCSet1 Vsen1 Gate3 Vout2
=80°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over, 12V, Ta=0 Typical values refer =25° duty cycle pulse testing used which keeps junction case temperatures equal ambient temperature. PARAMETER TEST CONDITION UNITS Supply UVLO Section UVLO Threshold-12V Supply ramping UVLO Hysterises-12V UVLO Threshold-5V Supply ramping UVLO Hysterises-5V Supply Current Operating Supply Current Switching Controller, Vcore (Vout Section output voltage (note Vdac 0.99Vs 1.01Vs Output Line Regulation Output Temp Variation Input Input input internal pull-up resistor
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Rev. 12/8/00
IRU3018
PARAMETER TEST CONDITION Error Comparator Section Input bias current Input Offset Voltage Delay Output Vdiff=10mV Current Limit Section Threshold Current Comp Offset Voltage Hiccup Duty Cycle Css=0.1µF Output Drivers Section Rise Time CL=3000pF Fall Time CL=3000pF Dead band Time Between High side Synch Drive Vcore Switcher Only CL=3000pF Oscillator Section (internal) Frequency 2.5V Regulator (Vout Reference Voltage Ta=25, Vout2 Reference Voltage Dropout Voltage Load Regulation 1mA< <200 Line Regulation 3.1V<Vin2<4V, Vo=2.5V Input bias current Output Current Current limit Thermal Shutdown 1.5V Regulator (Vout Reference Voltage Ta=25, GATE3 Reference Voltage Input bias current Output Drive Current Power Good Section Core lower trip point Vsen1 ramping down Core upper trip point Vsen1 ramping Core Hysterises Core upper trip point Vsen1 ramping Core lower trip point Vsen1 ramping down Core Hysterises lower trip point ramping down upper trip point ramping lower trip point ramping down upper trip point ramping Power Good Output RL=3mA Power Good Output RL=5K pull Fault (Overvoltage) Section Core upper trip point Vsen1 ramping Core lower trip point Vsen1 ramping down Vin2 upper trip point Vin2 ramping Vin2 lower trip point Vin2 ramping down FAULT Output Io=3mA Soft Start Section Pull resistor OCset=0V, Phase=5V Note refers point voltage given Table
Rev. 12/8/00
UNITS
1.260 1.260 1.260 1.260 0.90Vs 0.92Vs .02Vs 1.10Vs 1.08Vs .02Vs 0.95 1.05 0.95 1.05 1.17Vs 1.15Vs
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IRU3018
PARAMETER Enable Section input voltage input voltage input current input current Venl Venh TEST CONDITION Regulator Regulator Ven=0V 0.8V Ven=2V 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 0.01 UNITS
Table point voltage codes
DESCRIPTIONS
PIN# SYMBOL VID0 DESCRIPTION input that programs output voltage. This compatible that realizes logic either Open. When left open, this pulled internally resistor supply. Input that programs output voltage. This compatible that realizes logic either Open. When left open, this pulled internally resistor supply. Input that programs output voltage. This compatible that realizes logic either Open. When left open, this pulled internally resistor supply. input that programs output voltage. This compatible that realizes logic either Open. When left open, this pulled internally resistor supply. This selects range output voltages DAC. When state range 1.3V 2.05V when switches state range 2.0V 3.5V. This compatible that realizes logic either Open. When left open, this pulled internally resistor supply. This open collector output that switches when outputs outside specified under voltage trip point. also switches when Vsen1 more than above voltage setting. This provides feedback synchronous switching regulator. Typically this connected directly output switching regulator. However, resistor divider recommended connected from this Vout1 adjust output voltage drop output voltage that caused trace resistance. value resistor connected from Vout1 must less than 100.
Rev. 12/8/00
VID1
VID2
VID3
VID4
PGOOD
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IRU3018
PIN# SYMBOL VSEN1 VIN2 DESCRIPTION This internally connected undervoltage overvoltage comparators sensing Vcore status. must connected directly Vcore supply. This input that provides power internal regulator. also monitored under voltage over voltage conditions. This connected Drain power MOSFET Core supply provides positive sensing internal current sensing circuitry. external resistor programs current sense threshold depending power MOSFET. external capacitor placed parallel with programming resistor provide high frequency noise filtering. This connected Source power MOSFET Core supply provides negative sensing internal current sensing circuitry. This provides soft start switching regulator. internal resistor charges external capacitor that connected from supply this which ramps outputs switching regulators, preventing outputs from overshooting well limiting input current. second function Soft Start provide long time (HICCUP) synchronous MOSFET during current limiting. This dual function. acts output over-voltage protection circuitry used program frequency using external resistor. When used fault detector, switcher output exceeds over-voltage protection trip point, FAULT switches soft start discharged. FAULT connected external circuitry, needs buffered shown application circuit. This controls gate external transistor 1.5V GTL+ linear regulator. This provides feedback linear regulator that output drive GATE3. This output internal regulator. This provides feedback internal regulator that output Vout4. This serves ground must connected directly ground plane. This serves Power ground must connected directly plane close source synchronous MOSFET. high frequency capacitor (typically 1µF) must connected from this noise free operation. Output driver synchronous power MOSFET Core supply. Output driver high side power MOSFET Core supply. This connected supply serves power output drivers. high frequency capacitor (typically 1µF) must placed close this PGND connected directly from this plane noise free operation. supply voltage. high frequency capacitor (0.1 1µF) must placed close this connected from this plane noise free operation. This compatible Enable pin. When this left open pulled high, device enabled when pulled low, will disable switcher controller (Vout leaving internal 200mA regulator operational. When signal given enable device, both switcher Vout will through soft start, same during start
OCSet1
PHASE1
FAULT/Rt
GATE3 VOUT2 PGND LGATE1 UGATE1
Rev. 12/8/00
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IRU3018
BLOCK DIAGRAM
4.3V
Over Voltage Vset Enable
Enable
UGate1 Control
UVLO
Vset
1.17Vset
VID0 VID1 VID2 VID3 VID4 Vsen1 5Bit
1.1Vset Enable
2.5V
Slope Comp
LGate1 Phase1
Soft Start Fault Logic
Over Current
OCSet1 200uA
Fault
0.9Vset
Gate3 Vin2
1.26V 0.9V
PGnd
Vout2 PGood
3018blk1-1.2
Figure Simplified block diagram IRU3018
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Rev. 12/8/00
IRU3018
TYPICAL APPLICATION
OCSet1 UGate1
Phase1 LGate1
Vout1 1.8V 3.5V
Fault/Rt
PGnd Vsen1
3.3V
Vin2
PGood Vout3 1.5V VID0 VID1 VID2 VID3 Vout4 2.5V
3018app1-1.6
PGood
Gate3
Vout2
VID4
Figure Typical application IRU3018 board DC-DC converter providing power Vcore, GTL+ Clock supply Deschutes next generation processor applications
Rev. 12/8/00
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IRU3018
IRU3018 Application Parts List Desig Description MOSFET C1,17 C9,15,19 R6,7,8 MOSFET MOSFET with Schottky Inductor Inductor Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Resistor Resistor Resistor Part IRLR024, TO-252 package IRL3103S, TO-263 package IRL3103D1S, TO-263 package L=1µH, 5052 core with turns 1.0mm wire L=2.7µH, 5052B core with turns 1.2mm wire 6MV1000GX, 1000µF,6.3V 10MV470GX, 470µF,10V 10MV1200GX, 1200µF,10V 1µF, 0805 1µF, 0603 220pF, 0603 1000pF, 0603 10MV1200GX, 1200µF,10V 6MV1500GX, 1500µF, 6.3V 6MV150GX, 150µF, 6.3V 19.1, 0603 100, 0603 3.3k, 0603 4.7, 1206 2.2k, 0603 0603 Sanyo Sanyo Sanyo Sanyo Sanyo Sanyo Micro Metal Manuf Micro Metal
R13,14,15 Resistor R16,17,21 Resistor Resistor
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IRU3018
TYPICAL APPLICATION
(Dual Layout with HIP6018)
OCSet1 UGate1 (Fault) Phase1 LGate1 Fault/Rt (Rt) PGnd Vsen1 3.3V Vin2 Vout1 1.8V 3.5V
(Comp1)
PGood Gate3 Vout3 1.5V VID0 VID1 VID2 VID3 Vout4 2.5V
3018app2-1.6
PGood
Vout2
VID4
Figure Typical application IRU3018 dual layout with HIP6018 on-board DC-DC converter providing power Vcore, GTL+ Clock supply Deschutes next generation processor applications Components that need modified make dual layout work IRU3018 HIP6018
Part HIP6018 RU3018
Short
Open
Harris parts list value
Table Dual layout component table
Rev. 12/8/00
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IRU3018
IRU3018 Application Parts List Dual Layout with HIP6018 Desig Description MOSFET C1,17 C9,15,19 MOSFET MOSFET with Schottky Inductor Inductor Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Ceramic Part IRLR024, TO-252 package IRL3103S, TO-263 package IRL3103D1S, TO-263 package L=1µH, 5052 core with turns 1.0mm wire L=2.7µH, 5052B core with turns 1.2mm wire 6MV1000GX, 1000uF,6.3V 10MV470GX, 470µF,10V 10MV1200GX, 1200µF,10V 1µF, 0805 1µF, 0603 220pF, 0603 Table dual layout component 0603 R6,7,8 Capacitor, Ceramic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Resistor Resistor Resistor Resistor 1000pF, 0603 10MV1200GX, 1200µF,10V 6MV1500GX, 1500µF, 6.3V 6MV150GX, 150µF, 6.3V 19.1, 0603 100, 0603 0603 3.3k, 0603 4.7, 1206 2.2k, 0603 Table dual layout component 0603 Resistor Resistor 220k, 0603 0603 Sanyo Sanyo Sanyo Sanyo Sanyo Sanyo Micro Metal Manuf Micro Metal
C11,12,20 Capacitor, Ceramic
R13,14,15 Resistor R16,17,21 Resistor Resistor
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Rev. 12/8/00
IRU3018
APPLICATION INFORMATION
example calculate components application circuit given below. Assuming, output conditions that this regulator must meet Vcore: Vo=2.8V, Io=14.2A, Vo=185mV, Io=14.2A Vo=2V, Io=14.2A, Vo=140mV, Io=14.2A regulator design will done such that meets worst case requirement each condition. Output Capacitor Selection first step select output capacitor. This done primarily selecting maximum value that meets transient voltage budget total specification. Assuming that regulators initial accuracy plus output ripple output voltage, then maximum output capacitor calculated 14.2 must half 35mV higher than voltage setting. This intentional voltage level shifting during load transient eases requirement output capacitor cost load regulation. show that requirement eases half total trace resistance. example, requirement output capacitors without voltage level shifting must then after level shifting will only need 8.5m trace resistance (7+5/2=9.5). However, must careful that combined voltage level shifting transient response still within maximum tolerance Intel specification. insure this, maximum trace resistance must less than: 2(Vspec 0.02*Vo Vo)/I Where Rs=Total maximum trace resistance allowed Vspec=Intel total voltage spec Vo=Output voltage Vo=Output ripple voltage I=load current step example, assuming: Vspec=±140 mV=±0.1V output Vo=2V Vo=assume 10mV=0.01V I=14.2A Then calculated Other type Electrolytic capacitors from other manufacturers consider Panasonic series Nichicon series. Reducing Output Capacitors Using Voltage Level Shifting Technique trace resistance external resistor from output switching regulator Slot used circuit advantage possibly reduce number output capacitors, level shifting regulation point when transitioning from light load full load vice versa. accomplish this, output regulator typically about half drop that results from light load full load. example, total resistance from output capacitors Slot back IRU3018 total change from light load full load 14A, then output voltage measured resistor divider which also connected output capacitors this case, 2(0.140 0.02*2 0.01)/14.2=12.6m However, resistor this value used, maximum power dissipated trace external resistor being used) must also considered. example Rs=12.6 power dissipated (Io^2)*Rs=(14.2^2)*12.6=2.54W. This power dissipated system. Rs=5m, then power dissipated about which much more acceptable. level shifting implemented, then maximum output capacitor shown previously which translated 1500µF, 6MV1500GX type Sanyo capacitors. With Rs=5m, maximum becomes 9.5m which equivalent caps. Another important consideration that trace being used implement resistor, power dissipated trace increases case temperature output capacitors which could seriously effect life time output capacitors.
Sanyo MVGX series good choice achieve both price performance goals. 6MV1500GX, 1500µF, 6.3V less than typical. Selecting these capacitors parallel which achieves goal.
Rev. 12/8/00
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IRU3018
Output Inductor Selection output inductance must selected such that under line maximum output voltage condition, inductor current slope times output capacitor ramping faster than capacitor voltage drooping during load current step. However, inductor small, output ripple current ripple voltage become large. solution bring ripple current down increase switching frequency, however that will cost reduced efficiency higher system cost. following formulas derived achieve optimum performance without many design iterations. maximum output inductance calculated using following equation: Vinmin Vomax Where Vinmin Minimum input voltage 14.2 =0.006 9000 4.75 2.8) 14.2) 3.7µH Assuming that programmed switching frequency 200KHZ, inductor designed using Micrometals' Powder Iron core material. summary design outlined below: selected core material Powder Iron, selected core T50-52D from Micro Metal wound with turns wire, resulting inductance with resistance. Assuming switching frequency; 200KHZ, inductor ripple current output ripple voltage calculated using following equations: 1/Fsw Switching Period Vsync Vsync Duty Cycle High-side MOSFET Voltage MOSFET On-resistance Toff Vsync Synchronous MOSFET Voltage=Io Vsync Toff Inductor Ripple Current Output Ripple Voltage example 2.8V 14.2 load, assuming IRL3103 MOSFET both switches with maximum resistance have: 200000 5µSec =Vsync= 14.2*0.019=0.27 0.27 0.27 0.27 0.61 0.61 3.1µSec Toff 1.9µSec 0.27 1.94A 1.94 .006 .011 11mV Power Component Selection Assuming IRL3103 MOSFETs power components, will calculate maximum power dissipation follows: high-side switch maximum power dissipation happens maximum maximum duty cycle Dmax 0.27 4.75 0.27 0.27 0.65 Dmax Io^2*RDS(max) 0.65*14.2^2*0.029=3.8 RDS(max)=Maximum RDS(on) MOSFET 125°C synch MOSFET, maximum power dissipation happens minimum minimum duty cycle. Dmin 0.27 5.25 0.27 0.27 0.43 (1-Dmin)*Io^2*RDS(max) 0.43) 14.2^2 0.029 3.33 Heatsink Selection Selection heat sink based maximum allowable junction temperature MOSFETS. Since previously selected maximum RDS(on) 125°C, then must keep junction below this temperature. Selecting TO-220 package gives jc=1.8°C/W (from venders' datasheet) assuming that selected heatsink black anodized, heat-sink-to-case thermal resistance cs=0.05°C/W, maximum heat sink temperature then calculated 3.82 (1.8 0.05) With maximum heat sink temperature calculated previous step, heat-sink-to-air thermal resistance (sa) calculated follows:
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Rev. 12/8/00
IRU3018
Assuming Ta=35 Temperature Rise Above Ambient T/Pd 3.82 °C/W Next, heat sink with lower than calculated previous step must selected. this simply look graphs "Heat Sink Temp Rise Above Ambient" "Power Dissipation" given heatsink manufacturers' catalog select heat sink that results lower temperature rise than calculated previous step. following heat sinks from AAVID Thermalloy meet this criteria. Thermalloy AAVID Part 6078B 577002 1.5V, GTL+ Supply Power MOSFET Selection first step selecting power MOSFET 1.5V linear regulator select maximum RDS(on) pass transistor based input output Dropout voltage maximum load current. RDS(max)=(Vin Vo)/IL Vo=1.5V, Vin=3.3V IL=2A RDS(max)=(3.3 1.5)/2= Note that since MOSFETs RDS(on) increases with temperature, this number must divided 1.5, order find RDS(on) room temperature. Motorola MTP3055VL maximum 0.18 RDS(on) room temperature, which meets requirement. select heatsink MOSFET first step calculate maximum power dissipation device then follow same procedure switcher. Where Power Dissipation Linear Regulator Linear Regulator Load Current 1.5V load: (3.3 1.5)*2=3.6 Assuming Tj-max=125°C (1.8 0.05) With maximum heat sink temperature calculated previous step, heat-sink-to-air thermal resistance (sa) calculated follows: Assuming Ta=35 Temperature Above Ambient T/Pd °C/W
Following same procedure Schottky diode results heatsink with °C/W. Although possible select slightly smaller heatsink, simplicity same heatsink high side MOSFET also selected synchronous MOSFET. Switcher Current Limit Protection IRU3018 uses MOSFET RDS(on) sensing resistor sense MOSFET current compares programmed voltage which externally resistor (Rcs) placed between drain MOSFET OCSet1 terminal shown application circuit. example, desired current limit point synchronous synchronous, from previous selection, maximum MOSFET RDS(on)=19m, then current sense resistor calculated Vcs=IcL*RDS =22*0.019=0.418V Where: Ib=200µA internal current setting IRU3018 Switcher Frequency Selection IRU3018 frequency internally 200kHz with external timing resistor. However, adjusted using external resistor from adjusted down resistor connected supply.
Rise
same heat sink selected switcher MOSFETs also suitable 1.5V regulator. 2.5V, Clock Supply IRU3018 provides internal ultra dropout regulator with minimum 200mA current capability that
Rev. 12/8/00
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IRU3018
converts 3.3V supply programmable regulated 2.5V supply power clock chip. internal regulator short circuit protection with internal thermal shutdown. 1.5V 2.5V Supply Resistor Divider Selection Since internal voltage reference linear regulators 1.26V IRU3018, there need external resistor dividers step voltage. resistor dividers selected using following equations: Vo=(1+Rt/Rb)*Vref Where: Rt=Top resistor divider Rb=Bottom resistor divider Vref=1.26V typical 1.5V supply: Assuming Rb=100 Rt=Rb*[(Vo/Vref) Rt=100*[(1.5/1.26) 1]=19.1 2.5V supply: Assuming Rb=200 Rt=Rb*[(Vo/Vref) Rt=200*[(2.5/1.26) 1]=197 Select Rt=200 Switcher Output Voltage Adjust discussed earlier, trace resistance from output switching regulator Slot used circuit advantage possibly reduce number output capacitors, level shifting regulation point when transitioning from light load full load vice versa. account drop, output regulator typically about half drop that results from light load full load. example, total resistance from output capacitors Slot back IRU3018 total change from light load full load 14A, then output voltage measured resistor divider which also connected output capacitors this case, must half 35mV higher than voltage setting. this, resistor resistor divider (R17 application circuit) 100, calculated. example, voltage setting 2.8V desired output under light load 2.835V, then calculated using following formula: R19= 100*{Vdac /(Vo 1.004*Vdac)} R19= 100*{2.8 /(2.835 1.004*2.800)} 11.76 Select 11.8 Note: value resistor must exceed 100. bottom resistor then adjusted raise output voltage. Soft Start Capacitor Selection soft start capacitor must selected such that during start when output capacitors charging peak inductor current does reach current limit threshold. minimum capacitor insures this most applications. internal resistor charges soft start capacitor which slowly ramps inverting input comparator Vfb3. This insures output voltage ramp same rate soft start thereby limiting input current. example, with soft start capacitor, ramp rate approximated 1V/20mS. example output capacitance 9000µF, maximum start current will I=9000µF*(1V/20mS)=0.45A other function soft start provide time between current limit cycles(HICCUP) order synchronous MOSFET cool survive short circuit condition. time between current limit cycles approximated T(hicup)=60*Css (mS) example Css=1µF, T(hicup)=60*1=60 Input Filter highly recommended place inductor between system supply input capacitors switching regulator isolate supply from switching noise that occurs during turn switching components. Typically inductor range will sufficient this type application. External Shutdown best shutdown IRU3018 pull down soft start using external small signal transistor such 2N3904 2N7002 small signal MOSFET. This allows slow ramp output, same power
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IRU3018
Layout Considerations Switching regulators require careful attention layout components, specifically power components since they switch large currents. These switching components create large amount voltage spikes high frequency harmonics some critical components away from each other connected with inductive traces. following guideline place critical components connections between them order minimize above issues. Start layout first placing power components: Place input capacitor high-side MOSFET, close each other possible. Place synchronous MOSFET, close each other possible with intention that source drain shortest length. Place snubber between Place output inductor, output capacitors, between mosfet load with output capacitors distributed along slot close Place bypass capacitors, right next pins. next 12V, next Place IRU3018 such that output drives, pins relatively short distance from gates Place resistor dividers close their respective feedback pins. Place 2.5V output capacitor, close 1.5V output capacitor, close MOSFET. Note: better place 1.5V linear regulator components close 3018 then trace from output regulator load. However, this possible then trace from linear drive output pin, must away from high frequency data signals. critical, place high frequency ceramic capacitors close clock chip termination resistors provide local bypassing. Place close Place close Component connections: Note: extremely important that data should passing through switching regulator section specifically close fast transition nodes such drives inductor voltage. Using layer board, dedicate layer GND, another layer power layer 3.3V, Vcore, 1.5V possible 2.5V. Connect grounds ground plane using direct vias ground plane. large inductance/low impedance plane connect following connections either using component side solder side. Drain Source Drain drain output capacitors, load, slot Input filter drain source minimum inch width trace from capacitor Connect rest components using shortest connection possible.
Rev. 12/8/00
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IRU3018
IRU3018 Application Parts List Dual Layout with HIP6016 Desig Description Q3,4 MOSFET C17,C1 C8,19 MOSFET, MOSFET Inductor Inductor Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Ceramic Capacitor Ceramic1 Part IRL3103 IRL3103S (Note 2N7002 MTP3055VL, TO-263 package L=1µH Core :L=2µH mohm 6MV1500GX, 1500µF,6.3V, 6MV1500GX, 1500µF,6.3V, 6MV1500GX, 1500µF,6.3V, 220µF, 6.3V, ECAOJFQ221 680µF,10V, EEUFA1A681L 680µF, 10V, EEUFA1A681L 0805Z105P250NT 1µF, 25V, Z5U, 0805 0805Z105P250NT 1µF, 25V, Z5U, 0805 Table dual layout component C9,11, 12,15,20 R13,14 R11,16,18 21,22 HS3,4 Q1,3,4 Heatsink 6270 Thermalloy Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor 2.21k ,1%, 0805 size 1206 size 1206 size 10k, 0805 size 100, 0805 size 200, 0805 size 19.1, 0805 size 200, 0805 size 100, 0805 size 10k, 0805 size Table dual layout component Capacitor, Ceramic Capacitor, Ceramic 220pF, 0805 size 470pF, 0805 size Table dual layout component Novacap Micro Metal Sanyo Sanyo Sanyo Panasonic Panasonic Panasonic Novacap Motorola Motorola Manuf
Note applications where desirable Heatsink, IRL3103S MOSFET TO-263 package with square area using bottom layers board minimum required
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Rev. 12/8/00

5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS CONTROLLER 200mA ON-BOARD

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