IRU3021M [INFINEON]
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPLE LDO CONTROLLER; 5位可编程同步降压PLUS TRIPLE LDO控制器
| 型号： | IRU3021M |
| 厂家： | 
Infineon |
| 描述： | 5-BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPLE LDO CONTROLLER |
| 文件： | 总8页 (文件大小：116K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet No. PD94145
IRU3021M
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK
PLUS TRIPLE LDO CONTROLLER
FEATURES
DESCRIPTION
Provides single chip solution for Vcore, GTL+,
AGP bus, and 1.8V
The IRU3021M controller IC is specifically designed to
meet Intel specification for next generation microproces-
sor applications requiring multiple on-board regulators.
The IRU3021M provides a single chip controller IC for
the Vcore, three LDO controllers, one with an automatic
select pin that connects to the Type Detect pin of the
AGP slot for the AGP VDDQ supply, one for GTL+ and
the other for the 1.8V chip set regulator as required for
the next generation PC applications. The IRU3021M uses
N-channel MOSFET as pass transistor for Vout2(VDDQ),
Vout3(1.5V) and Vout4(1.8V). No external resistor di-
vider is necessary for any of the regulators. The switch-
ing regulator feature a patented topology that in combi-
nation with a few external components as shown in the
typical application circuit, will provide well in excess of
20A of output current for an on-board DC/DC converter
while automatically providing the right output voltage via
the 5-bit internal DAC .The IRU3021M also features, loss-
less current sensing for both switcher by using the RDS(on)
of the high-side power MOSFET as the sensing resistor,
an output under-voltage shutdown that detects short cir-
cuit condition for the linear outputs and latches the sys-
tem off, and a Power Good window comparator that
switches its open collector output low when any one of
the outputs is outside of a pre-programmed window.
Automatic voltage selection for AGP slot VDDQ
supply
Linear Regulator Controller On-Board for 1.8V
Designed to meet Intel latest VRM specification
for next generation microprocessors
On-Board DAC programs the output voltage from
1.3V to 3.5V
Linear Regulator Controller On-Board for 1.5V
GTL+ Supply
Loss-less Short Circuit Protection for all Outputs
Synchronous operation allows maximum effi-
ciency
Patented architecture allows fixed frequency
operation as well as 100% duty cycle during
dynamic load
Minimum Part Count
Soft-Start
High current totem pole driver for direct driving of
the external Power MOSFET
Power Good function monitors all outputs
Over-Voltage Protection Circuitry Protects the
switcher output and generates a Fault output
APPLICATIONS
Total Power Solution for next generation Intel
processor application
TYPICAL APPLICATION
5V
3.3V
LINEAR
CONTROL
SWITCHER
Vout1
Vout4
CONTROL
Vout2
IRU3021M
LINEAR
LINEAR
CONTROL
CONTROL
Vout3
3021Mapp3-1.1
Figure 1 - Typical application of the IRU3021M.
PACKAGE ORDER INFORMATION
TA (ꢀC)
DEVICE
PACKAGE
0 To 70
IRU3021MCW
28-Pin Plastic SOIC WB
Rev. 1.4
07/24/01
1
IRU3021M
ABSOLUTE MAXIMUM RATINGS
V5 Supply Voltage ................................................... 7V
V12 Supply Voltage .................................................. 20V
Storage Temperature Range ...................................... -65°C To 150°C
Operating Junction Temperature Range ..................... 0°C To 125°C
PACKAGE INFORMATION
28-PIN WIDE BODY PLASTIC SOIC (W)
TOP VIEW
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Drive2
Fix
VID4
VID3
VID2
V12
UGate
Phase
LGate
PGnd
OCSet
Vsen1
Fb
3
4
5
6
VID1
VID0
7
8
PGood
SD
Vsen2
Select
SS
9
V5
10
11
12
13
14
Vsen3
Drive3
Gnd
NC
Drive4
Fault / Rt
Vsen4
θJA =80ꢀC/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over V12=12V, V5=5V and TA=0 to 70°C. Typical values refer
to TA=25°C. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient
temperature.
PARAMETER
SYM
TEST CONDITION
Supply Ramping Up
Supply Ramping Up
MIN
TYP
MAX
UNITS
Supply UVLO Section
UVLO Threshold-12V
UVLO Hysteresis-12V
UVLO Threshold-5V
UVLO Hysteresis-5V
Supply Current
10
0.6
4.4
0.3
V
V
V
V
Operating Supply Current
V12
V5
6
30
mA
Switching Controllers; Vcore (Vsen 1) and AGP (Vsen 2)
VID Section (Vcore only)
DAC output voltage (Note 1)
DAC Output Line Regulation
DAC Output Temp Variation
VID Input LO
0.99Vs
2
Vs
0.1
0.5
1.01Vs
0.8
V
%
%
V
VID Input HI
V
VID Input Internal Pull-Up
Resistor to V5
27
1.5
3.3
KΩ
V
V
Vsen2 Voltage
Select<0.8V
Select>2V
Rev. 1.4
07/24/01
2
IRU3021M
PARAMETER
SYM
TEST CONDITION
Vdiff=10mV
MIN
TYP
MAX
UNITS
Error Comparator Section
Input Bias Current
2
+2
100
µA
mV
ns
Input Offset Voltage
Delay to Output
-2
Current Limit Section
CS Threshold Set Current
CS Comp Offset Voltage
Hiccup Duty Cycle
200
10
µA
mV
%
-5
+5
Css=0.1µF
Output Drivers Section
Rise Time
CL=3000pF
CL=3000pF
70
70
ns
ns
Fall Time
Dead Band Time Between
High Side and Synch Drive
(Vcore Switcher Only)
Oscillator Section (Internal)
Osc Frequency
CL=3000pF
200
217
ns
Rt=Open
KHz
1.8V Regulator (Vsen 4)
Vsense Voltage
Vo4
Vo3
TA=25ꢀC, Drive4=Vsen4
1.800
1.800
V
V
µA
mA
Vsense Voltage
Input Bias Current
2
2
Output Drive Current
1.5V Regulator (Vsen3)
Vsense Voltage
Vaux - Vdrive>0.6V
50
50
TA=25ꢀC, Drive3=Vsen3
1.500
1.500
V
V
µA
mA
Vsense Voltage
Input Bias Current
Output Drive Current
Power-Good Section
Vsen1 UV Lower Trip Point
Vsen1 UV Upper Trip Point
Vsen1 UV Hysteresis
Vsen1 HV Upper Trip Point
Vsen1 HV Lower Trip Point
Vsen1 HV Hysterises
Vsen2 Trip Point
Vaux - Vdrive>0.6V
Vsen1 Ramping Down
Vsen1 Ramping Up
0.90Vs
0.92Vs
0.02Vs
1.10Vs
1.08Vs
0.02Vs
1.100
2.560
0.920
1.320
0.920
1.140
0.4
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Vsen1 Ramping Up
Vsen1 Ramping Down
Select<0.8V
Select>2V
Fix=Gnd
Vsen4 Trip Point
Vsen3 Trip Point
Fix=Open
Fix=Gnd
Fix=Open
Power Good Output LO
Power Good Output HI
Fault (Overvoltage) Section
Core OV Upper Trip Point
Core OV Lower Trip Point
FAULT Output HI
RL=3mA
RL=5K, Pull-Up to 5V
4.8
Vsen1 Ramping Up
Vsen1 Ramping Down
Io=3mA
1.17Vs
1.15Vs
10
V
V
V
Soft-Start Section
Soft-Start Current
OCSet=0V, Phase=5V
20
µA
Note 1: Vs refers to the set point voltage given in Table 1.
Rev. 1.4
07/24/01
3
IRU3021M
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
D2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
D1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Vs
D4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
D2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
D1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Vs
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
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 1 - Set point voltage vs. VID codes.
PIN DESCRIPTIONS
PIN# PIN SYMBOL
PIN DESCRIPTION
1
2
Drive2
Fix
This pin controls the gate of an external MOSFET for the AGP linear regulator.
Leaving this pin open provides fixed output voltages of the 1.5V and 1.8V for the #3 and #4
linear regulators. When this pin is grounded the reference to the linear regulators are set
to 1.26V and therefore the output of the regulators can be programmed to any voltages
above the 1.26V using: Vout=1.26 × (1 + Rtop/Rbot)
Where:
Rtop = Top resistor connected from the output to the Vsense pin
Rbot = Bottom resistor connected from the Vsense pin to ground
This pin selects a range of output voltages for the DAC. When in the LOW state the range
is 1.3V to 2.05V and when it switches to HI state the range is 2.0V to 3.5V. This pin is TTL
compatible that realizes a logic “1” as either HI or Open. When left open, this pin is pulled
up internally by a 27KΩ resistor to 5V supply.
3
VID4
4
5
6
7
8
VID3
VID2
MSB input to the DAC that programs the output voltage. This pin is TTL compatible that
realizes a logic “1” as either HI or Open. When left open, this pin is pulled up internally by
a 27KΩ resistor to 5V supply.
Input to the DAC that programs the output voltage. This pin is TTL compatible that realizes
a logic “1” as either HI or Open. When left open, this pin is pulled up internally by a 27KΩ
resistor to 5V supply.
VID1
Input to the DAC that programs the output voltage. This pin is TTL compatible that realizes
a logic “1” as either HI or Open. When left open, this pin is pulled up internally by a 27KΩ
resistor to 5V supply.
VID0
LSB input to the DAC that programs the output voltage. This pin is TTL compatible that
realizes a logic “1” as either HI or Open. When left open, this pin is pulled up internally by
a 27KΩ resistor to 5V supply.
PGood
This pin is an open collector output that switches LO when any of the outputs are outside
of the specified under-voltage trip point. It also switches low when Vsen1 pin is more than
10% above the DAC voltage setting.
Rev. 1.4
07/24/01
4
IRU3021M
PIN# PIN SYMBOL
PIN DESCRIPTION
9
SD
This pin provides shutdown for all the regulators. A TTL compatible, logic level high applied
to this pin disables all the outputs and discharges the soft-start capacitor. The SD signal
turns off the synchronous MOSFET allowing body diode to conduct and discharge the
output capacitor.
10
Vsen2
This pin provides the feedback for the AGP linear regulator. The Select pin when con-
nected to the "Type Detect" pin of the AGP slot automatically selects the right voltage for
the AGP VDDQ.
11
12
Select
SS
This pin provides automatic voltage selection for the AGP switching regulator. When it is
pulled LO, the voltage is 1.5V and when left open or pulled to HI, the voltage is 3.3V.
This pin provides the soft-start for all the regulators. An internal current source charges an
external capacitor that is connected from this pin to ground which ramps up the outputs of
the regulators, preventing the outputs from overshooting as well as limiting the input cur-
rent. The second function of the Soft-Start cap is to provide long off time (HICCUP) for the
synchronous MOSFET during current limiting.
13
Fault / Rt
This pin has dual function. It acts as an output of the over-voltage protection circuitry or it
can be used to program the frequency using an external resistor. When used as a fault
detector, if any of the switcher outputs exceed the OVP trip point, the Fault pin switches
to 12V and the soft-start cap is discharged. If the Fault pin is to be connected to any
external circuitry, it needs to be buffered.
14
15
16
17
18
19
20
Vsen4
Drive4
NC
This pin provides the feedback for the linear regulator that its output drive is Drive4.
This pin controls the gate of an external MOSFET for the 1.8V chip set linear regulator.
This pin is not connected internally.
Gnd
This pin serves as the ground pin and must be connected directly to the ground plane.
This pin controls the gate of an external transistor for the 1.5V GTL+ linear regulator.
This pin provides the feedback for the linear regulator that its output drive is Drive3.
5V supply voltage. A high frequency capacitor (0.1 to 1µF) must be placed close to this
pin and connected from this pin to the ground plane for noise free operation.
This pin provides the feedback for the synchronous switching regulator. Typically this pin
can be connected directly to the output of the switching regulator. However, a resistor
divider is recommended to be connected from this pin to Vout1 and ground to adjust the
output voltage for any drop in the output voltage that is caused by the trace resistance.
The value of the resistor connected from Vout1 to Fb1 must be less than 1000Ω.
This pin is internally connected to the under-voltage and over-voltage comparators sens-
ing the Vcore status. It must be connected directly to the Vcore supply.
This pin is connected to the Drain of the power MOSFET of the Core supply and it provides
the positive sensing for the internal current sensing circuitry. An external resistor pro-
grams the current sense threshold depending on the RDS of the power MOSFET. An
external capacitor is placed in parallel with the programming resistor to provide high fre-
quency noise filtering.
Drive3
Vsen3
V5
21
Fb
22
23
Vsen1
OCSet
24
PGnd
This pin serves as the Power ground pin and must be connected directly to the ground
plane close to the source of the synchronous MOSFET. A high frequency capacitor (typi-
cally 1µF) must be connected from V12 pin to this pin for noise free operation.
Output driver for the synchronous power MOSFET for the Core supply.
This pin is connected to the source of the power MOSFET for the Core supply and it
provides the negative sensing for the internal current sensing circuitry.
25
26
LGate
Phase
27
28
UGate
V12
Output driver for the high side power MOSFET for the Core supply.
This pin is connected to the 12V supply and serves as the power Vcc pin for the output
drivers. A high frequency capacitor (typically 1µF) must be placed close to this pin and
PGnd pin and be connected directly from this pin to the ground plane for the noise free
operation.
Rev. 1.4
07/24/01
5
IRU3021M
BLOCK DIAGRAM
28
20
9
Enable
21
27
V12
V5
Fb
UVLO
1.17Vset
1.1Vset
V12
V12
Over
SD
Vset
Enable
UGate
Voltage
22
8
Vsen1
PGood
Vsen3
Vsen4
PWM
+
Control
19
14
25
Slope
Comp
LGate
Osc
26
23
24
17
13
12
Phase
OCSet
PGnd
Gnd
Over
Current
Soft
Start &
Fault
2
Fix
Enable
0.9Vset
200uA
Logic
15
Drive4
Fault / Rt
SS
R
1.26V
3R
Vset
18
11
Drive3
Select
7
6
5
4
3
VID0
VID1
VID2
VID3
VID4
1.5V
3.3V
5Bit
DAC
R
3R
1
Drive2
Vsen2
10
Figure 2 - Simplified block diagram of the IRU3021M.
Rev. 1.4
07/24/01
6
IRU3021M
TYPICAL APPLICATION
(Dual Layout with HIP6021)
R1
12V
L1
C5
R2
C4
R4
C3
5V
C1
C2
28
23
OCSet
V12
Q1
Q3
9 SD
2 Fix
UGate 27
L2
Type Detect
3.3Vin
11 Select
Phase 26
LGate 25
Vcore
C7
R7
C22
R14
R3
R6
R5
R10
16 NC
(Vaux)
PGnd 24
Vsen1 22
Fb 21
C6
Q2
Q4
Q5
1 Drive2
10 Vsen2
R8
C14
R11
R9
C16
Vout2
V5 20
U1
1.5V / 3.3V
(COMP)
C17
C13
R12
C15
IRU3021M
VID0 7
18 Drive3
VID1 6
VID2 5
VID3 4
VID4 3
Vout3
1.5V
19 Vsen3
Vcc3
C18
R13
PGood 8
PGood
15 Drive4
Fault / Rt 13
C21
Vsen4 Gnd
14 17
SS
12
3021Mapp2-1.2
Vout4
1.8V
C20
C19
Figure 3 - Typical application of IRU3021M in a dual layout with HIP6021 for an on-board
DC-DC converter providing power for the Vcore, GTL+, 1.8V chip set supply as well as
auto select AGP supply for the next generation PC applications.
Part#
R3
O
R5 R9 R12 C15 C16 C17
HIP6021
IRU3021M
S
O
S
V
O
V
V
V
S
O
O
O
O
S - Short
O - Open
V - See IR or Harris parts list for the value
Table 2 - Dual layout component table.
Rev. 1.4
07/24/01
7
IRU3021M
IRU3021M APPLICATION PARTS LIST
Dual Layout with HIP6021
Ref Desig Description
Qty
1
1
1
2
Part #
IRL3103S, TO-263 package
IRLR3103, TO-252 package
IRL3103D1S, TO-263 package
IRLR024, TO-252 package
L=1µH, 5052 core with 4 turns of
1.0mm wire
Manuf
Q1
Q2
Q3
Q4,5
L1
MOSFET
IR
MOSFET
MOSFET with Schottky
MOSFET
IR
IR
IR
Inductor
1
Micro Metal
L2
Inductor
1
L=2.7µH, 5052B core with 7 turns of
1.2mm wire
Micro Metal
C1
C2,3
C4
C5
C6,18
C7
C13,19
C14,15
C16,17
Capacitor, Electrolytic
Capacitor, Electrolytic
Capacitor, Ceramic
Capacitor, Ceramic
Capacitor, Electrolytic
Capacitor, Electrolytic
Capacitor, Electrolytic
Capacitor, Ceramic
Capacitor, Ceramic
1
2
1
1
2
6
1
2
2
10MV470GX, 470µF, 10V
10MV1200GX, 1200µF, 10V
220pF, 0603
Sanyo
Sanyo
1µF, 0805
6MV1000GX, 1000µF, 6.3V
6MV1500GX, 1500µF, 6.3V
6MV1500GX, 1500µF, 6.3V
1µF, 0603
See Table 2, dual layout component
0603 × 2
Sanyo
Sanyo
Sanyo
C20,21
C22
R1
R2
R3,5,12
Capacitor, Ceramic
Capacitor, Ceramic
Resistor
Resistor
Resistor
2
1
1
1
3
0.1µF, 0603
1000pF, 0603
10Ω, 5%, 0603
3.3KΩ, 5%, 0603
See Table 2, dual layout component
0603 × 3
R4,7,14
R6,8,10
R9
R11
R13
Resistor
Resistor
Resistor
Resistor
Resistor
3
3
1
1
1
4.7Ω, 5%, 1206
2.2KΩ, 1%, 0603
0Ω, 0603
220KΩ, 1%, 0603
10KΩ, 5%, 0603
IR WORLD HEADQUARTERS : 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 02/01
Rev. 1.4
07/24/01
8
相关型号：
IRU3021MCWTR
Switching Controller, Current/voltage-mode, 217kHz Switching Freq-Max, PDSO28, PLASTIC, SOIC-28
INFINEON
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