Texas Instruments | Power Reference Design for the 'C6472, 12V DCDC Controllers, and LDOs | Application notes | Texas Instruments Power Reference Design for the 'C6472, 12V DCDC Controllers, and LDOs Application notes

Texas Instruments Power Reference Design for the 'C6472, 12V DCDC Controllers, and LDOs Application notes
Reference Design
SLTA068 – March 2010
Power Reference Design for the TMS320C6472, 12-Vin
DC/DC Controllers, and LDOs (1x C6472)
This reference design is intended for designers who wish to design a TMS320C6472 Digital Signal
Processor into a system using a nominal input voltage of 12 V, external FETs for design flexibility, and
low-dropout (LDO) regulators for the low-power rails.
1
2
3
4
5
6
Contents
Introduction ..................................................................................................................
Power Requirements .......................................................................................................
Device Features .............................................................................................................
Schematic ....................................................................................................................
Bill of Materials ..............................................................................................................
12-Vin, DC/DC Controllers and LDOs (1x C6472) .....................................................................
1
Schematic, 1 of 2
1
2
3
4
5
9
List of Figures
2
...........................................................................................................
Schematic, 2 of 2 ...........................................................................................................
4
5
List of Tables
1
1
TMS320C6472 Power Requirements .................................................................................... 2
2
Reference Design Parameters ............................................................................................ 2
3
PMP5176.1 Bill of Materials ............................................................................................... 5
Introduction
This reference design is for powering one TMS320C6472 Digital Signal Processor and accounts for
voltage and current requirements given in Table 2. The core voltage has been optimized for 1-V operation.
This design also includes enough margin on the 1.8-V rail to account for typical amounts of memory (2 ×
667MHz DDR SDRAM), which comes to just over 600 mA.
The TMS320C6472 requires a 3.3-V, 1.8-V, 1.2-V, and 1-V/1.1-V/1.2-V input. Power-up sequencing is
required and is shown in Table 1. In multivoltage architectures, coordinated management of power
supplies is necessary to avoid potential problems and ensure reliable performance. Power supply
designers must consider the timing and voltage differences between core and I/O voltage supplies during
power-up and power-down operations.
Sequencing refers to the order, timing, and differential in which the two voltage rails are powered up and
down. A system designed without proper sequencing may be at risk for two types of failures. The first
failure represents a threat to the long-term reliability of the dual-voltage device, whereas the second failure
is more immediate, with the possibility of damaging interface circuits in the processor or system devices
such as memory, logic, or data converter integrated circuits (IC).
Another potential problem with improper supply sequencing is bus contention. Bus contention is a
condition when the processor and another device both attempt to control a bidirectional bus during power
up. Bus contention may also affect I/O reliability. Power supply designers must check the requirements
regarding bus contention for individual devices.
SLTA068 – March 2010
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Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
1
Power Requirements
2
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Power Requirements
The power requirements for each TMS320C6472 follow. For more information and other reference
designs, visit www.ti.com/processorpower.
Table 1. TMS320C6472 (1) Power Requirements
Core, I/O
Core
Pin Name
CVDD, CVDD2 (2)
CVDD1
DVDD33
IO
Analog
(1)
(2)
(3)
(4)
Voltage
(V)
Imax
(mA)
Tolerance
1 / 1.1 /
1.2
9500
±5
1.2
260
±5
3.3
100
±5
DVDD18 (3), DVDD15
1.8 (4)
150
±5
AVDDA1, AVDDA2, AVDDA3, DVDDD
1.8 (4)
190
±5
1.2
170
±5
AVDDA, DVDDD, AVDDT, AVDDA4, DVDDR
Sequencing
Order
Timing
Delay
2
<200 ms
1
3
<200 ms
<200 ms
Consult the TMS320C6472 power spreadsheet for your exact power requirements.
CVDD and CVDD2 are 1 V @ 500 MHz, 1.1 V @ 625 MHz (Imax = 4900 mA), and 1.2 V @ 700 MHz (Imax = 9500 mA).
DVDD18 voltage rail includes power required for external DDR2 memory.
All 1.8-V rails may be combined, and all 1.1-V rails may be combined; however, follow the filtering recommendations for each
voltage rail in the TMS320C6472 Hardware Design Guide (SPRAAQ4).
Table 2. Reference Design Parameters
Power Supply Specifications:
2
Vin
12 V ± 10%
Vout1
1 V ± 5% at 5 A
Vout2
1.2 V ± 5% at 300 mA
Vout3
3.3 V ± 5% at 1 A
Vout4
1.8 V ± 5% at 1 A
Vout5
1.2 V ± 5% at 200 mA
DDR Termination
0.9 V at 3 A
Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
SLTA068 – March 2010
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Device Features
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3
Device Features
TPS40192 DC/DC Buck Controller
• Input Operating Voltage Range: 4.5 V to 18 V
• Up to 20-A Output Currents
• Supports Prebiased Outputs
• 0.5% 0.591-V Reference
• Three Selectable Thermally Compensated Short-Circuit Protection Levels
• Hiccup Restart From Faults
• Internal 5-V Regulator
• High- and Low-Side FET RDSON Current Sensing
TPS72012 Single-Channel, Low-Dropout Regulator
• 350-mA, High-Performance LDO
• Low Quiescent Current: 38 µA
• Excellent Load Transient Response:
– ±15 mV for ILOAD = 0 mA to 350 mA in 1 µs
• Excellent Line Transient Response:
– VOUT = ±2 mV for VBIAS = ±600 mV in 1 µs
– VOUT = ±200 µV for VIN = ±400 mV in 1 µs
• Low Noise: 48 µVRMS (10 Hz to 100 kHz)
• 80-dB VIN PSRR (10 Hz to 10 kHz), 70-dB VBIAS PSRR (10 Hz to 10 kHz)
• Fast Start-Up Time: 140 µs
• Built-In Soft-Start With Monotonic VOUT Rise and Start-Up Current Limited to 100 mA + ILOAD
• Overcurrent and Thermal Protection
• Low Dropout: 110 mV at ILOAD = 350 mA
• Stable With 2.2-µF Output Capacitor
TPS51200 Single-Channel, Low-Dropout Regulator
• 3-A DDR Termination LDO
• VLDOIN Voltage Range: 1.1 V to 3.5 V
• Sink/Source Termination Regulator Includes Droop Compensation
• Requires Minimum Output Capacitance of 20-µF (Typically 3 × 10-µF MLCCs) for Memory Termination
Applications (DDR)
• PGOOD to Monitor Output Regulation and Remote Sensing (VOSNS)
• ±10-mA Buffered Reference (REFOUT)
• Meets DDR, DDR2 JEDEC Specifications; Supports DDR3 and Low-Power DDR3/DDR4 VTT
Applications
SLTA068 – March 2010
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Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
3
Schematic
4
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Schematic
Figure 1. Schematic, 1 of 2
4
Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
SLTA068 – March 2010
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Bill of Materials
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Figure 2. Schematic, 2 of 2
5
Bill of Materials
Table 3. PMP5176.1 Bill of Materials
Count
RefDes
Value
Description
Size
Part Number
MFR
6
C1
10 µF
Capacitor, Ceramic, 25V, X5R, 20%
1210
Std
Std
C2
10 µF
Capacitor, Ceramic, 25V, X5R, 20%
1210
Std
Std
3
C3
10 nF
Capacitor, Ceramic, 50V, X7R, 10%
0603
Std
Std
2
C4
470 nF
Capacitor, Ceramic, 25V, X5R, 20%
0603
Std
Std
6
C5
100 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
1210
Std
Std
C6
100 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
1210
Std
Std
5
C7
1 µF
Capacitor, Ceramic, 25V, X5R, 20%
0603
Std
Std
3
C8
100 pF
Capacitor, Ceramic, 50V, C0G, 5%
0603
Std
Std
1
C9
1 µF
Capacitor, Ceramic, 25V, X5R, 20%
0805
Std
Std
2
C10
4.7 µF
Capacitor, Ceramic, 16V, X5R, 20%
0805
Std
Std
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Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
5
Bill of Materials
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Table 3. PMP5176.1 Bill of Materials (continued)
Count
RefDes
Value
Description
Size
Part Number
MFR
3
C11
1000 pF
Capacitor, Ceramic, 50V, C0G, 5%
0603
Std
Std
C12
10 µF
Capacitor, Ceramic, 25V, X5R, 20%
1210
Std
Std
C13
10 µF
Capacitor, Ceramic, 25V, X5R, 20%
1210
Std
Std
C14
10 nF
Capacitor, Ceramic, 50V, X7R, 10%
0603
Std
Std
C15
470 nF
Capacitor, Ceramic, 25V, X5R, 20%
0603
Std
Std
C16
100 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
1210
Std
Std
C17
100 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
1210
Std
Std
C18
1 µF
Capacitor, Ceramic, 25V, X5R, 20%
0603
Std
Std
C19
100 pF
Capacitor, Ceramic, 50V, C0G, 5%
0603
Std
Std
C20
1.0 µF
Capacitor, Ceramic, 25V, X5R, 20%
0805
Std
Std
C21
4.7 µF
Capacitor, Ceramic, 16V, X5R, 20%
0805
Std
Std
C22
1000 pF
Capacitor, Ceramic, 50V, C0G, 5%
0603
Std
Std
1
C23
1 nF
Capacitor, Ceramic, 50V, C0G, 5%
0603
Std
Std
6
C24
10 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
0805
Std
Std
C25
10 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
0805
Std
Std
C26
10 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
0805
Std
Std
C27
0.1 µF
Capacitor, Ceramic, 25V, X7R, 10%
0603
Std
Std
C28
10 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
0805
Std
Std
C29
10 pF
Capacitor, Ceramic, 50V, C0G, 5%
0603
Std
Std
C30
10 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
0805
Std
Std
C31
10 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
0805
Std
Std
C32
1 µF
Capacitor, Ceramic, 25V, X5R, 20%
0603
Std
Std
C33
2.2 µF
Capacitor, Ceramic, 10V, X5R, 20%
0603
Std
Std
C34
0.1 µF
Capacitor, Ceramic, 25V, X7R, 10%
0603
Std
Std
C35
1 µF
Capacitor, Ceramic, 25V, X5R, 20%
0603
Std
Std
C36
2.2 µF
Capacitor, Ceramic, 10V, X5R, 20%
0603
Std
Std
C37
0.1 µF
Capacitor, Ceramic, 25V, X7R, 10%
0603
Std
Std
C38
10 µF
Capacitor, Ceramic, 25V, X5R, 20%
1210
Std
Std
C39
10 µF
Capacitor, Ceramic, 25V, X5R, 20%
1210
Std
Std
C40
0.1 µF
Capacitor, Ceramic, 25V, X7R, 10%
0805
Std
Std
C41
10 nF
Capacitor, Ceramic, 50V, X7R, 10%
0603
Std
Std
C42
470 nF
Capacitor, Ceramic, 10V, X5R, 20%
0603
Std
Std
C43
100 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
1210
Std
Std
C44
100 µF
Capacitor, Ceramic, 6.3V, X5R, 20%
1210
Std
Std
C45
1 µF
Capacitor, Ceramic, 25V, X5R, 20%
0603
Std
Std
C46
100 pF
Capacitor, Ceramic, 50V, C0G, 5%
0603
Std
Std
1
C47
1 µF
Capacitor, Ceramic, 25V, X5R, 20%
0805
Std
Std
1
C48
4.7 µF
Capacitor, Ceramic, 10V, X5R, 20%
0805
Std
Std
C49
1000 pF
Capacitor, Ceramic, 50V, C0G, 5%
0603
Std
Std
J1
ED1609-ND
Terminal Block, 2-pin, 15-A, 5.1mm
0.40 × 0.35 inch
ED1609
OST
J2
ED1609-ND
Terminal Block, 2-pin, 15-A, 5.1mm
0.40 × 0.35 inch
ED1609
OST
J3
ED1609-ND
Terminal Block, 2-pin, 15-A, 5.1mm
0.40 × 0.35 inch
ED1609
OST
J5
ED1609-ND
Terminal Block, 2-pin, 15-A, 5.1mm
0.40 × 0.35 inch
ED1609
OST
J6
ED1609-ND
Terminal Block, 2-pin, 15-A, 5.1mm
0.40 × 0.35 inch
ED1609
OST
J7
ED1609-ND
Terminal Block, 2-pin, 15-A, 5.1mm
0.40 × 0.35 inch
ED1609
OST
1
J8
ED555/2DS
Terminal Block, 2-pin, 6-A, 3.5mm
0.27 × 0.25 inch
ED555/2DS
OST
3
L1
1.0 µH
Inductor, SMT, 7.2 mΩ, 17A sat, 12A rms
0.268 × 0.268 inch
PG0083.102
Pulse
L2
1.0 µH
Inductor, SMT, 7.2 mΩ, 17A sat, 12A rms
0.268 × 0.268 inch
PG0083.102
Pulse
L3
1.0 µH
Inductor, SMT, 7.2 mΩ, 17A sat, 12A rms
0.268 × 0.268 inch
PG0083.102
Pulse
3
Q1
IRF7466
FET, N-Chan, 30V, 17 mΩ at 4.5V, 23nC at 4.5V
SO8
IRF7466
IR
3
Q2
IRF7834
FET, N-Chan, 30V, 5.5 mΩ at 4.5V, 44nC at 4.5V
SO8
IRF7834
IR
1
3
1
2
1
1
6
6
Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
SLTA068 – March 2010
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Bill of Materials
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Table 3. PMP5176.1 Bill of Materials (continued)
Count
RefDes
Value
Description
Size
Part Number
MFR
Q3
IRF7466
FET, N-Chan, 30V, 17 mΩ at 4.5V, 23nC at 4.5V
SO8
IRF7466
IR
Q4
IRF7834
FET, N-Chan, 30V, 5.5 mΩ at 4.5V, 44nC at 4.5V
SO8
IRF7834
IR
Q5
IRF7466
FET, N-Chan, 30V, 17 mΩ at 4.5V, 23nC at 4.5V
SO8
IRF7466
IR
Q6
IRF7834
FET, N-Chan, 30V, 5.5 mΩ at 4.5V, 44nC at 4.5V
SO8
IRF7834
IR
5
R1
0
Resistor, Chip, 1/16W, 1%
0603
Std
Std
7
R2
100k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
3
R3
3.01k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R4
0
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R5
3.9k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R6
100k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
3
R7
20k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
3
R8
49.9
Resistor, Chip, 1/16W, 1%
0603
Std
Std
3
R9
open
Resistor, Chip, 1/16W, 1%
0603
Std
Std
1
R10
4.32k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
3
R11
1.33k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R12
0
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R13
100k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R14
3.01k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R15
0
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R16
3.9k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R17
100k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R18
20k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R19
49.9
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R20
open
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R21
9.76k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R22
1.33k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R23
100K
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R24
10K
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R25
10K
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R26
10
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R27
100k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R28
0
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R29
3.01k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R30
0
Resistor, Chip, 1/16W, 5%
0603
Std
Std
R31
3.9k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R32
100k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R33
20k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R34
49.9
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R35
open
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R36
28.7k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
R37
1.33k
Resistor, Chip, 1/16W, 1%
0603
Std
Std
3
1
2
1
1
1
2
SH1
Short jumper
SH2
Short jumper
18
TP1
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
7
TP2
5011
Test Point, Black, Thru Hole
0.125 × 0.125 inch
5011
Keystone
TP3
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP4
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP5
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP6
5011
Test Point, Black, Thru Hole
0.125 × 0.125 inch
5011
Keystone
TP7
5012
Test Point, White, Thru Hole
0.125 × 0.125 inch
5012
Keystone
TP9
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
5
SLTA068 – March 2010
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Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
7
Bill of Materials
www.ti.com
Table 3. PMP5176.1 Bill of Materials (continued)
Count
RefDes
Value
Description
Size
Part Number
MFR
TP10
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP11
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP12
5011
Test Point, Black, Thru Hole
0.125 × 0.125 inch
5011
Keystone
TP13
5012
Test Point, White, Thru Hole
0.125 × 0.125 inch
5012
Keystone
TP14
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP15
5012
Test Point, White, Thru Hole
0.125 × 0.125 inch
5012
Keystone
TP16
5012
Test Point, White, Thru Hole
0.125 × 0.125 inch
5012
Keystone
TP18
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP20
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP21
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP22
5011
Test Point, Black, Thru Hole
0.125 × 0.125 inch
5011
Keystone
TP23
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP24
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP25
5011
Test Point, Black, Thru Hole
0.125 × 0.125 inch
5011
Keystone
TP26
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP27
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP28
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP29
5011
Test Point, Black, Thru Hole
0.125 × 0.125 inch
5011
Keystone
TP30
5012
Test Point, White, Thru Hole
0.125 × 0.125 inch
5012
Keystone
TP31
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
TP32
5011
Test Point, Black, Thru Hole
0.125 × 0.125 inch
5011
Keystone
TP33
5010
Test Point, Red, Thru Hole
0.125 × 0.125 inch
5010
Keystone
U1
TPS40192DRC
IC, Cost Optimized Mid Vin High Freq. Sync. Buck controller
DRC10
TPS40192DRC
TI
U2
TPS40192DRC
IC, Cost Optimized Mid Vin High Freq. Sync. Buck controller
DRC10
TPS40192DRC
TI
1
U3
TPS51200DRC
IC, Sink/Source DDR Termination Regulator
DRC
TPS51200DRC
TI
2
U4
TPS72012YZU
IC, LDO Linear Regulator With Bias Pin, 350mA
WCSP-5
TPS72012YZU
TI
U5
TPS72012YZU
IC, LDO Linear Regulator With Bias Pin, 350mA
WCSP-5
TPS72012YZU
TI
U6
TPS40192DRC
IC, Cost Optimized Mid Vin High Freq. Sync. Buck controller
DRC10
TPS40192DRC
TI
3
Notes: 1. These assemblies are ESD sensitive, ESD precautions shall be observed.
2. These assemblies must be clean and free from flux and all contaminants.
Clean flux must be used.
3. These assemblies must comply with workmanship standards IPC-A-610 Class 2.
4. Reference designators marked with an asterisk ('**') cannot be substituted.
All other components can be substituted with equivalent MFG's components.
8
Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
SLTA068 – March 2010
Submit Documentation Feedback
12-Vin, DC/DC Controllers and LDOs (1x C6472)
www.ti.com
6
12-Vin, DC/DC Controllers and LDOs (1x C6472)
CH1 – Vout 3, CH2 – Vout 4, CH3 – DDR termination, CH4 – Vout 5 (2 V/div, 1 V/div, 1 V/div, 1 V/div, 4
ms/div)
1.2 V
0.9 V
3.3 V
1.8 V
CH1 – Vout 3, CH2 – Vout 5, CH3 – Vout 2, CH4 – Vout 1 (2 V/div, 1 V/div, 1 V/div, 1 V/div, 4 ms/div)
1V
1.2 V
3.3 V
1.2 V
SLTA068 – March 2010
Submit Documentation Feedback
Power Reference Design for the TMS320C6472, 12-Vin DC/DC Controllers, and
LDOs (1x C6472)
Copyright © 2010, Texas Instruments Incorporated
9
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