an1632

Application Note 1632
ISL9440AMGTHEVAL1Z - Power Module User Guide
Introduction
Voltage margining on all the output rails is achieved by
changing the equivalent feedback resistor divider setting using
the I2C bus controlled quad-Digitally Controlled Potentiometer
(DCP) ISL22346.
The ISL9440AMGTHEVAL1Z is Intersil’s high performance,
cost-effective power module for Xilinx’s high speed GTH serial
transceivers on Virtex-6 HXT Characterization Boards. Utilizing
the popular ISL9440A and ISL8009A for the power stage, the
module also features quad-DCP ISL22346 for set point
adjustment. Sequencing is achieved using Intersil’s dual
voltage monitor ISL88012.
The power module achieves excellent regulation by remotely
sensing the output voltage close to its load. Figure 1 shows the
block diagram implementation of the power module.
This user guide is intended to serve as a manual for using the
ISL9440AMGTHEVAL1Z power module and also list its various
performance characteristics.
5V FOR BIAS
ISL9440A
PWM1
1.1V, 3.5A
MGTHAVCCRX
3.3V FOR POWER STAGE
Key Features
PWM2
The ISL9440AMGTHEVAL1Z power module uses the three
channel buck controller and single linear controller ISL9440A
for generating voltage rails MGTHAVCC, MGTHAVCCRX and
MGTHAVCCPLL. MGTHAVTT is generated using the tiny
integrated FET regulator ISL8009A. Switching at 600kHz, the
ISL9440A reduces output inductor and capacitor
requirements. The ISL8009A integrates upper and lower
power MOSFETs and switches at 1.6MHz, reducing external
component requirements even further. Table 1 lists the
specifications of each rail.
1.1V, 5.1A
MGTHAVCC
EN1
ISL88012
(DUAL SUPPLY
MONITOR)
EN2
EN3
PWM3
1.8V, 2.6A
MGTHAVCCPLL
ISL22346
(DCP)
ISL8009A
EN
1.2V, 1.5A
MGTHAVTT
FIGURE 1. ISL9440AMGTHEVAL1Z BLOCK DIAGRAM
FIGURE 2. ISL9440AMGTHEVAL1Z TOP VIEW
TABLE 1. POWER MODULE PARAMETERS
PARAMETER
MGTHAVCC
MGTHAVCCRX
MGTHAVTT
MGTHAVCCPLL
Output Voltage
1.1V ±1%
1.1 ±1%
1.2 ±1%
1.8 ±1%
Rated Current
5.5A
4A
1.5A
3.2A
Peak to Peak Ripple
<10mV
<10mV
<10mV
<10mV
Please contact Intersil Marketing for ordering this power module.
March 31, 2011
AN1632.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Copyright Intersil Americas Inc. 2011. All Rights Reserved.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Application Note 1632
TABLE 2. ADDRESS BYTE AND VALUE OF WIPER REGISTER FOR MARGINING
WR FOR -10%
MARGINING
(HEX)
WR FOR -5%
MARGINING
(HEX)
WR FOR +5%
MARGINING
(HEX)
WR FOR +10%
MARGINING
(HEX)
WR FOR +15%
MARGINING
(HEX)
OUTPUT RAIL
ADDRESS (HEX)
DEFAULT VALUE
(HEX)
MGTHARX
00
5D
6E
66
52
4A
42
MGTHAVCC
01
5D
6E
66
52
4A
42
MGTHAVCCPLL
10
37
5A
48
29
1B
0F
MGTHAVTT
11
56
6E
62
4C
43
39
Voltage Margining Using DCP
The ISL22346 is a quad-DCP that allows changing the center tap
position by writing an 8-bit word into its Wiper Position (WP)
register through the I2C bus. Changing the center tap position of
DCP changes the equivalent feedback resistor divider and results
in a change in output voltage.
The DCP can be identified via the I2C byte ‘A0’. Please refer to
the part datasheet for description of the I2C bus. Table 2 lists the
MGTHAVCCPLL
MGTHAVCC MGTHAVTT
MGTHAVCCRX
specific address for each output rail. It also lists the typical value
of the wiper register for each rail to achieve margining. Margining
is fairly linear between the values shown.
Sequencing Using ISL88012
The power module uses the 5V input rail to bias the ISL9440A.
The 3.3V input rail is used as input voltage for power conversion.
The ISL88012 is a dual voltage monitor that signals a logic high
when both the 5V and the 3.3V rails have started up. Subsequent
RC circuits are used to generate delays on ‘Enable’ of each
individual output rail to give the following start-up sequence:
1. MGTHAVCC powers up first.
2. MGTHAVCCRX powers up within 1ms of MGTHAVCC.
3. MGTHAVTT and MGTHAVCCPLL delayed relative to MGTHAVCC
and MGTHAVCCRX by a minimum of 10µs.
Figure 3 shows a typical start-up waveform.
2
VOLTAGES AT 500mV/DIV
TIME AT 5ms/DIV
FIGURE 3. START-UP SEQUENCE
Protection Features
All the output rails feature overcurrent protection. Please refer to
ISL9440A and ISL8009A datasheets for specific overcurrent
protection mechanisms. The ISL9440A also has output over
voltage protection. Both the controllers feature built-in thermal
protection.
In the event remote sense feedback from control connector J2 is
lost, the module will not get damaged. In fact, all the output rails
of the power module continue good voltage regulation under
such an event. This is achieved via a redundant internal feedback
path.
AN1632.0
March 31, 2011
Application Note 1632
Typical Performance Curves
2.0
100
1.5
MGTHAVCCPLL (1.8V, 2.6A)
REGULATION (%)
EFFICIENCY (%)
80
MGTHAVCCRX (1.1V, 3.5A)
60
MGTHAVCC (1.1V, 5.1A)
MGTHAVTT (1.2V, 1.5A)
40
MGTHAVTT (1.2V, 1.5A)
1.0
MGTHAVCC (1.1V, 5.1A)
0.5
0
-0.5
MGTHAVCCPLL (1.8V, 2.6A)
-1.0
20
MGTHAVCCRX (1.1V, 3.5A)
-1.5
0
20
40
60
80
FULL LOAD (%)
FIGURE 4. EFFICIENCY vs LOAD CURRENT
MGTHAVCC AT 10mV/DIV
TIME AT 2µs/DIV
FIGURE 6. MGTHAVCC OUTPUT RIPPLE (LOAD = 5.1A)
MGTHAVCCPLL AT 10mV/DIV
TIME AT 2µs/DIV
FIGURE 8. MGTHAVCCPLL OUTPUT RIPPLE (LOAD = 2.6A)
3
100
-2.0
0
20
40
60
80
100
FULL LOAD (%)
FIGURE 5. LOAD REGULATION
MGTHAVCCRX AT 10mV/DIV
TIME AT 2µs/DIV
FIGURE 7. MGTHAVCCRX OUTPUT RIPPLE (LOAD = 3.5A)
MGTHAVTT AT 2mV/DIV
TIME AT 2µs/DIV
FIGURE 9. MGTHAVTT OUTPUT RIPPLE (LOAD = 1.5A)
AN1632.0
March 31, 2011
Schematic
5
4
3
2
1
V_3p3
CIN3
CIN1
CIN2
DNP
10u
6.3V
10u
6.3V
CIN4
10u
6.3V
Q1
M2
FDS6982AS
Q2
PH2
UG2
J2
UG3
22
1.8V @ 2.6A
LG3
21
0.1u
Crx1
Crx2
Crx3
Crx4
0.1uF
16V
47u
6.3V
DNP
6.3V
47u
6.3V
Rsen3
1.5K
R39
V_3p3
A1
200
VCCRX_SNS
0
PH2
3
EN_VCC
5
Cdcr22
100p
R11 Cp2
69.8K
DNP
1%
RST
VMON
4
1%
V_3p3
EN_VCCRX
D2
DNP
R9
25.5K
1%
5
FB_VTT
50K
1%
CIN7
CIN8
10u
6.3V
DNP
16
17
A0
19
18
RH1
RW0
RL1
ISL22346
U3
RH3
RW1
RL3
RH2
RW3
RL2
Epad
15
VCC_SNS
14
13
1% R24 10K
12
FB_VCC
VCCPLL_SNS
R25
0
1%
11
21
R22
0
1%
FB_VCCPLL
150K
1%
SCL
SDA
3
4
VIN
EN
LX
ISL8009A GND
POR
SKIP
VFB
RSI
8
Coiltronics SD53-2R0-R
VTT
Ltt
7
6
5
2.0u
FB_VTT
200R411%
VTT_SNS
R4
59K
1%
R30
0
1%
Ctt1
Ctt2
Ctt3
Ctt4
22u
6.3V
DNP
DNP
22u
6.3V
1.2V @ 1.5A
0805 Size
Cff4
DNP
R7
118K
1%
Cdel1
0.047uF
Cdel2
0.47uF
4
RL0
U2
1
EN_VTT 2
RPOR
100K
1%
R5 102K
VTT_SNS3
R12
EN_VCCPLL
V_5p0
GND
2
0.47u
6.3V
R23
ISL88012
R28
10K
1%
FB_VCCRX
1% 10K R27
PH3
9
2
VDD
1
1%
R10
0
1%
0.47u
6.3V
CIN10
U4
RST/MR#
R40
19.6K
DNP
V_3p3
1
R29
50K
1%
EN_VCCPLL
Cp3
Cdcr32
100p
RW2
R26
A1
3.3n
Cdcr31
3.3n
Cdcr21
R38
19.6K
CIN9
A0
VCCPLL
VCC
1210/1206 Size
Rpu
30K
1%
CL3
DNP
EN_VCCPLL
R37
200
1.1V @ 3.5A
LG3
RL3
DNP
10
Lrx 1.5u
1.5u
1210/1206 Size
VCC_SNS
VCCRX
PH1
0.1uF
16V
16V
UG3
Q2
PH3
R6
63.4K
1%
ROC3
50K
Cll1
47u
6.3V
VCC
17
CB3
Cll2
47u
6.3V
GND
18
R17 0
Cll3
47u
6.3V
SDA
20
19
Cll4
9
R8 26.1K 1%
Coiltronics DR73-1R5-R
CL1
DNP
DNP
Lll
23
Q1
MPLL
FDS6982AS
PH3
20
EN/SS3
24
R3
78.7K
1%
FB_VCC
MRX
FDS6982AS
1.1V @ 5.1A
VCCPLL
FB_VCCPLL
RL1
DNP
D1
47u
6.3V
1210/1206 Size
EPAD
Q2
47u
6.3V
Coiltronics DR73-1R5-R
ROC2 50K
LG1
47u
6.3V
RH0
FB_VCC
V_3p3
Q1
UG1
47u
6.3V
25
PHASE2
27
26
BOOT2
30
28
LGATE2
UGATE2
LGATE1
ISEN3
RST_N
PH1
47u
6.3V
SHDN#
DNP
Ccc4
DNP
10V
6
R43
10K
PHASE3
OCSET1
Cdcr12
330p
R36
15K
Ccc3
SCL
2.2n
8
BOOT3
FB1
PAD
A0
A1
ROC1
50K
R2
69.8K
1%
Ccc2
V_3p3
VCCPLL_SNS
Cp1
Cdcr11
UGATE3
ISL9440A
EN/SS1
FB3
7
VCCRX
VIN
16
SCL
SDA
6
PGND
OCSET3
FB_VCCRX
R35
200
ISEN2
LGATE3
EN/SS2
EN_VCCRX 5
Ccc1
Rsen2
1.1K
VCC_5V
FB2
4
R1 26.1K 1%
VCCRX_SNS
Ccc6
CL2
1200pF
CB2 0.1u
PGOOD
15
3
OCSET2
2
6.3v
ISEN1
SGND
1
CVCC1 4.7u
13
10
12
RFIN1
V_5p0
UGATE1
Rsen1
1.1K
11
VCCPLL_SNS
29
PH1
U1
R34 0
Ccc5
16V
PHASE2
32
VTT_SNS
R14 0
PHASE1
R33 0
R13 0
31
16V
LG1
UG1
CB1 0.1u
BOOT1
M2
M1
CON8
VCCRX_SNS
VCC
VCCRX
VTT
VCCPLL
G4
R32 0
V_5p0
V_3p3
LDOFB
VCC_SNS
9
0
10
R31
VCC
Lcc 1uH
RL2
2.4R
14
EN_VCC
M2
M1
1
2
3
4
5
6
7
8
J1
R42
10K
CON80
Coiltronics DR74-1R0-R
LG2
33
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
M2
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
Title
ISL9440AMGTHEVAL1Z
Size
Document Number
Custom<Doc>
Date:
AN1632.0
March 31, 2011
5
4
3
2
Sunday, February 13, 2011
Sheet
1
1
Application Note 1632
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
M1
4
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
A2
DNP
8
CIN6
10u
6.3V
7
CIN5
Application Note 1632
TABLE 3. BILL OF MATERIALS
ITEM
QTY
PART REFERENCE
VALUE
1
1
Cdcr32
100pF
2
2
3
DESCRIPTION
MANUFACTURER
PART NUMBER
100pF; 50V; NPO, SMD, 0603
TDK
C1608C0G1H101J
Cdcr12, Cdcr22
330pF 330pF; 50V; NPO, SMD, 0603
TDK
C1608C0G1H331J
5
CB1, CB2, CB3,
Crx1, Cll1
0.1µF
TDK
C1608X7R1H104K
4
1
CL2
1200pF 1200pF; 50V; X7R; SMD; 0603
TDK
C1608X7R1H122K
5
1
Cdcr31
3300pF 3300pF; 50V; X7R; SMD; 0603
TDK
C1608X7R1H332K
6
2
Cdcr11, Cdcr21
2200pF 2200pF; 50V; X7R; SMD; 0603
TDK
C1608X7R1H222K
7
1
Cdel1
0.047µF 0.047µF; 50V; X7R; SMD; 0603
TDK
C1608X7R1H473K
8
3
CIN9, CIN10, Cdel2
0.47µF 0.47µF; 50V; X7R; SMD; 0603
TDK
C1608X7R1H474K
9
5
CIN1, CIN2, CIN4,
CIN5, CIN7
10µF
10µF; 10V; X5R; SMD; 0805
TDK
C2012X5R1A106K
10
2
Ctt1, Ctt4
22µF
22µF; 6.3V; X5R; SMD; 0805
TDK
C2012X5R1A226K
11
1
CVCC1
4.7µF
4.7µF; 6.3V; X5R; SMD; 0805
TDK
C2012X5R0J475K
12
10
Crx2, Crx4, Ccc1-Ccc4,
Ccc6, Cll2, Cll3, Cll4
47µF
47µF; 6.3V; X5R; SMD; 1206
TDK
C3216X5R0J476M
13
2
LLL, LRX
1.5µH
Inductor
Coiltronics
DR73-1R5-R
14
1
LCC
1.0µH
Inductor
Coiltronics
DR74-1R0-R
15
1
LTT
2.0µH
Inductor
Coiltronics
SD53-2R0-R
16
1
U3
Quad-DCP
Intersil
ISL22346UFRT20Z
17
1
U2
Integrated FET Regulator
Intersil
ISL8009AIRZ
18
1
U4
Dual Voltage Monitor
Intersil
ISL88012IH546Z
19
1
U1
Three Channel Buck and One Linear Regulator Controller
Intersil
ISL9440AIRZ
20
3
MRX, M2, MPLL
Fairchild
FDS6982AS
21
4
R35, R37, R39, R41
200Ω
Resistor, SMD, 0603, 1%
22
1
RL2
2.4Ω
Resistor, SMD, 0603, 1%
23
12
R10, R13, R14, R17,
R22, R25, R26, R30,
R31, R32, R33, R34.
0Ω
Resistor, SMD, 0603, 1%
24
5
R24, R27, R28,
R42, R43
10kΩ
Resistor, SMD, 0603, 1%
25
1
RPOR
100kΩ Resistor, SMD, 0603, 1%
26
1
R5
102kΩ Resistor, SMD, 0603, 1%
27
2
RSEN1, RSEN2
28
1
R7
29
1
RSEN3
1.5kΩ
Resistor, SMD, 0603, 1%
30
1
R36
15kΩ
Resistor, SMD, 0603, 1%
31
1
R23
150kΩ Resistor, SMD, 0603, 1%
32
2
R38, R40
19.6kΩ Resistor, SMD, 0603, 1%
33
1
R9
25.5kΩ Resistor, SMD, 0603, 1%
34
2
R1, R8
26.1kΩ Resistor, SMD, 0603, 1%
35
1
Rpu
0.1µF; 50V; X7R; SMD; 0603
N-Channel MOSFET
1.1kΩ
Resistor, SMD, 0603, 1%
118kΩ Resistor, SMD, 0603, 1%
30kΩ
5
Resistor, SMD, 0603, 1%
AN1632.0
March 31, 2011
Application Note 1632
TABLE 3. BILL OF MATERIALS (Continued)
ITEM
QTY
PART REFERENCE
VALUE
36
5
R12, R29, ROC1,
ROC2, ROC3
49.9kΩ Resistor, SMD, 0603, 1%
37
1
R4
38
1
R6
63.4kΩ Resistor, SMD, 0603, 1%
39
2
R2, R11
69.8kΩ Resistor, SMD, 0603, 1%
40
1
R3
78.7kΩ Resistor, SMD, 0603, 1%
41
1
RFIN
42
1
J2
43
1
J1
59kΩ
10Ω
DESCRIPTION
MANUFACTURER
PART NUMBER
Signal Connector
Samtec
BSE-040-01-L-D-A
Power Connector
Samtec
MPS-08-7.70-01-L-V
Resistor, SMD, 0603, 1%
Resistor, SMD, 0603, 1%
ISL9440AMGTHEVAL1Z PCB Layout
FIGURE 10. TOP LAYER
6
FIGURE 11. SECOND LAYER (SOLID GROUND)
AN1632.0
March 31, 2011
Application Note 1632
ISL9440AMGTHEVAL1Z PCB Layout
FIGURE 12. THIRD LAYER
(Continued)
FIGURE 13. BOTTOM LAYER
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is
cautioned to verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
7
AN1632.0
March 31, 2011
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