5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPLE CONTROLLER Provid

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5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPLE CONTROLLER Provid

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IRU3021M
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPLE CONTROLLER
Provides single chip solution Vcore, GTL+, bus, 1.8V Automatic voltage selection slot Vddq supply Linear regulator controller on-board 1.8V Designed meet Intel latest specification next generation microprocessors On-board programs output voltage from 1.3V 3.5V Linear regulator controller on-board 1.5V GTL+ supply Loss-less short circuit protection outputs Synchronous operation allows maximum efficiency Patented architecture allows fixed frequency operation well 100% duty cycle during dynamic load Minimum part count 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 output
DESCRIPTION
IRU3021M controller specifically designed meet Intel specification next generation microprocessor applications requiring multiple board regulators. IRU3021M provides single chip controller Vcore, three controllers, with automatic select that connects Type Detect slot Vddq supply, GTL+ other 1.8V chipset regulator required next generation applications. IRU3021M uses N-channel MOSFET pass transistor Vout2(Vddq), Vout3(1.5V) Vout4(1.8V). external resistor divider necessary regulators. switching regulator features patented topology that combination with external components shown typical application circuit, will provide well excess output current board DC/DC converter while automatically providing right output voltage internal .The IRU3021M also features, loss-less current sensing both switcher using RDS(on) high-side power MOSFET sensing resistor, output under voltage shutdown that detects short circuit condition linear outputs latches system off, Power Good window comparator that switches open collector output when outputs outside pre-programmed window.
APPLICATIONS
Total Power Solution Next Generation Intel Processor application
TYPICAL APPLICATION
3.3V LINEAR CONTROL Vout2 SWITCHER CONTROL Vout1
IRU3021M
LINEAR CONTROL Vout3
LINEAR CONTROL Vout4
3021Mapp3-1.1
PACKAGE ORDER INFORMATION
(°C)
Rev. 12/8/00
Device IRU3021MCW
Package 28-pin Plastic SOIC
4-61
IRU3021M
ABSOLUTE MAXIMUM RATINGS
supply Voltage Supply Voltage Storage Temperature Range Operating Junction Temperature Range 150° 125°
PACKAGE INFORMATION
28-PIN WIDE BODY PLASTIC SOIC
VIEW
Drive2 VID4 VID3 VID2 VID1 VID0 PGood Vsen2 Select Fault Vsen4
UGate Phase LGate PGnd OCSet Vsen1 Vsen3 Drive3 Drive4
=80°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over, 12V, Ta=0 70°C. Typical values refer =25°C. 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 Controllers; Vcore (Vsen (Vsen Section (Vcore only) output voltage (note 0.99Vs 1.01Vs Output Line Regulation Output Temp Variation Input Input input internal pull-up resistor Vsen2 Voltage Select<0.8V Select>2V
4-62
Rev. 12/8/00
IRU3021M
PARAMETER TEST CONDITION Css=0.1µF CL=3000pF CL=3000pF UNITS
Error Comparator Section Input bias current Input Offset Voltage Delay Output Current Limit Section Threshold Current Comp Offset Voltage Hiccup Duty Cycle Output Drivers Section Rise Time Fall Time Dead band Time Between High side Synch Drive (Vcore Switcher Only) Oscillator Section (internal) Frequency 1.8V Regulator (Vsen Vsense Voltage Vsense Voltage Input bias current Output Drive Current 1.5V Regulator (Vsen Vsense Voltage Vsense Voltage Input bias current Output Drive Current Power Good Section Vsen1 lower trip point Vsen1 upper trip point Vsen1 Hysterises Vsen1 upper trip point Vsen1 lower trip point Vsen1 Hysterises Vsen2 trip point Vsen4 trip point Vsen3 trip point Power Good Output Power Good Output Fault (Overvoltage) Section Core O.V. upper trip point Core O.V. lower trip point FAULT Output Soft Start Section Soft Start Current
Vdiff=10mV
CL=3000pF Rt=Open Ta=25, Drive4 Vsen4
1.800 1.800
Vaux-Vdrive>0.6V
Ta=25, Drive3 Vsen3
1.500 1.500
Vaux-Vdrive>0.6V
Vsen1 ramping down Vsen1 ramping Vsen1 ramping Vsen1 ramping down Select<0.8V Select>2V Fix=GND Fix=Open Fix=GND Fix=Open RL=3mA RL=5K pull Vsen1 ramping Vsen1 ramping down Io=3mA OCset=0V Phase=5V
0.90Vs 0.92Vs .02Vs 1.10Vs 1.08Vs .02Vs 1.100 2.560 0.920 1.320 0.920 1.140 1.17Vs 1.15Vs
Rev. 12/8/00
4-63
IRU3021M
Note refers point voltage given Table 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
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 1000. This controls gate external MOSFET linear regulator. This provides shutdown regulators. compatible, logic level high applied this disables outputs discharges soft start capacitor. signal turns synchronous MOSFET allowing body diode conduct discharge output capacitor.
Rev. 12/8/00
VID1
VID2
VID3
VID4
PGOOD
Drive2
4-64
IRU3021M
PIN# SYMBOL Vsen1 Vsen2 Drive4 OCSet DESCRIPTION This internally connected undervoltage overvoltage comparators sensing Vcore status. must connected directly Vcore supply. This provides feedback linear regulator. Select when connected "Type Detect" slot automatically selects right voltage Vddq. This controls gate external MOSFET 1.8V chipset linear regulator. 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 regulators. internal current source charges external capacitor that connected from this which ramps outputs 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 outputs exceed over-voltage protection trip point, FAULT switches soft start discharged. FAULT connected external circuitry, needs buffered. This controls gate external transistor 1.5V GTL+ linear regulator. This provides feedback linear regulator that output drive Drive3. This connected internally. This provides feedback linear regulator that output drive Drive4. 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 provides automatic voltage selection switching regulator. When pulled voltage 1.5V when left open pulled voltage 3.3V. Leaving this open provides fixed output voltages 1.5V 1.8V linear regulators. When this grounded reference linear regulators 1.26V therefore output regulators programmed voltages above 1.26V using; Vout=1.26*(1+Rtop/Rbot) Where: Rtop=Top resistor connected from output Vsense Rbot=Bottom resistor connected from Vsense ground.
PHASE
FAULT/Rt
Drive3 Vsen3 Vsen4 PGND LGATE UGATE
Select
Rev. 12/8/00
4-65
IRU3021M
BLOCK DIAGRAM
Vsen1 PGood Vsen3 Vsen4 UVLO
Enable 1.17Vset Over Voltage Vset Enable
UGate Control
1.1Vset
Slope Comp
LGate Phase
0.9Vset
Enable
Soft Start Fault Logic
Over Current
OCSet 200uA PGnd Fault
Drive4
1.26V Vset
Drive3 Select
1.5V 3.3V
VID0 VID1 5Bit VID2 VID3 VID4
Drive2 Vsen2
3021Mblk1-1.0
Figure Simplified block diagram IRU3021M
4-66
Rev. 12/8/00
IRU3021M
TYPICAL APPLICATION
(Dual Layout with HIP6021)
Type Detect SELECT PHASE LGATE 3.3Vin (Vaux) DRIVE2 Vout2 1.5V 3.3V
Vcore
(COMP)
DRIVE3
Vout3 1.5V
Vcc3 PGood
DRIVE4
FAULT/RT
Vout4 1.8V
3021Mapp2-1.2
Figure Typical application IRU3021M dual layout with HIP6021 on-board DC-DC converter providing power Vcore, GTL+, 1.8V chipset supply well auto select supply next generation applications.
Part# HIP6021 IRU3021M
Short
Open
Harris parts list value
Table Dual layout component table
Rev. 12/8/00
4-67
IRU3021M
IRU3021M Application Parts List Dual Layout with HIP6021
Desig Description MOSFET Q4,5 C2,3 C6,18 C13,19 C14,15 C16,17 C20,21 R3,5,12 R4,7,14 R6,8,10 MOSFET MOSFET with Schottky MOSFET Inductor Inductor Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Electrolytic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Ceramic Capacitor, Ceramic Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor
Part IRL3103S, TO-263 package IRLR3103, TO-252 package IRL3103D1S, TO-263 package IRLR024, TO-252 package L=1µH, 5052 core with turns 1.0mm wire L=2.7µH, 5052B core with turns 1.2mm wire 10MV470GX, 470µF,10V 10MV1200GX, 1200µF,10V 220pF, 0603 1µF, 0805 6MV1000GX, 1000µF, 6.3V 6MV1500GX, 1500µF, 6.3V 6MV1500GX, 1500µF, 6.3V 1µF, 0603 Table dual layout component 0603 0.1µF, 0603 1000pF, 0603 0603 3.3k, 0603 Table dual layout component 0603 4.7, 1206 2.2k, 0603 0603 220k, 0603 10k, 0603
Manuf Micro Metal Micro Metal Sanyo Sanyo
Sanyo Sanyo Sanyo
4-68
Rev. 12/8/00

5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPLE CONTROLLER Provid

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