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LTM4677 Datasheet(PDF) 11 Page - Analog Devices

Part # LTM4677
Description  Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management
PDF  110 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTM4677 Datasheet(HTML) 11 Page - Analog Devices

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LTC3888-1
11
Rev. 0
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
8-Phase DC Output Current
Sharing (Using TDA21470)
4-Phase Dynamic Load Sharing
4-Phase Dynamic Load Sharing
Typical Distribution of Slave IOUT
Offset (Not Including DrMOS
Mismatch) Room
Typical Distribution of Slave IOUT
Offset (Not Including DrMOS
Mismatch) Hot
Typical Distribution of Slave IOUT
Offset (Not Including DrMOS
Mismatch) Cold
Soft-Start Ramp
Start-Up Into a Prebiased Load
4+4 Channel Crosstalk (Using
TDA21470)
PHASE 0
PHASE 1
PHASE 2
PHASE 3
PHASE 4
PHASE 5
PHASE 6
PHASE 7
TOTAL RAIL CURRENT (A)
0
40
80
120
160
200
240
0
5
10
15
20
25
30
Sharing (Using TDA21470)
8-Phase DC Output Current
3888-1 G10
2s/DIV
INDUCTOR
CURRENT
5A/DIV
3888-1 G11
VIN = 12V
VOUT = 1.0V
SYNC = 500kHz
L = 215nH
2s/DIV
INDUCTOR
CURRENT
5A/DIV
3888-1 G12
VIN = 12V
VOUT = 1.0V
SYNC = 500kHz
L = 215nH
2ms/DIV
VOUT_COMMAND = 1.0V
VOUT_TRANSITION_RATE = 0.1V/ms
TON_DELAY = 5ms
VOUT
0.5V/DIV
RUN
2V/DIV
3888-1 G16
2ms/DIV
VOUT
0.5V PREBIAS
I(LO)
5V/DIV
3888-1 G17
VOUT_COMMAND = 1.0V
VOUT_TRANSITION_RATE = 0.1V/ms
100s/DIV
VOUT0
20mV/DIV
VOUT1
20mV/DIV
IOUT0
40V/DIV
3888-1 G18
ALL 8 PHASES
1047 UNITS
FROM 3 LOTS
TA = 25°C
ISENSE OFFSET TO IDEAL (mV)
–8 –6 –4 –2 0
2
4
6
8
0
1000
2000
3000
4000
5000
6000
7000
8000
DrMOS Mismatch)
IOUT Offset (Not Including
Typical Distribution of Slave
3888-1 G13
ALL 8 PHASES
1035 UNITS
FROM 3 LOTS
TA = 125°C
ISENSE OFFSET TO IDEAL (mV)
–8 –6 –4 –2 0
2
4
6
8
0
1000
2000
3000
4000
5000
6000
7000
8000
DrMOS Mismatch)
IOUT Offset (Not Including
Typical Distribution of Slave
3888-1 G14
ALL 8 PHASES
949 UNITS
FROM 3 LOTS
TA = –40°C
ISENSE OFFSET TO IDEAL (mV)
–8 –6 –4 –2 0
2
4
6
8
0
1000
2000
3000
4000
5000
6000
7000
8000
DrMOS Mismatch)
IOUT Offset (Not Including
Typical Distribution of Slave
3888-1 G15



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