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LTM4677 Datasheet(PDF) 10 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) 10 Page - Analog Devices

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LTC3888-1
10
Rev. 0
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
(8-Phase Using LTC7051)
Efficiency vs Load Current
(1-Phase Using TDA21470)
Efficiency and Power Loss vs
Input Voltage
(4-Phase Using TDA21470)
Regulated Output vs Temperature
Typical Output Voltage
Distribution at 25°C Without Servo
Typical Output Voltage Distrubtion
at 25°C with Servo
4-Phase Load Step Response
(Using TDA21470)
Emulated 4-Phase Load Step
Response (Using TDA21470)
4-Phase Single Cycle Response
(Using TDA21470 with COUT = 4mF)
VIN = 12V
at 500kHz
0.6V
0.8V
1.0V
1.8V
LOAD CURRENT (A)
0
80
160
240
320
400
70
75
80
85
90
95
100
(8–Phase Using LTC7051)
Efficiency vs Load Current
3888-1 G01
VOUT = 1.0V
Load = 80A
at 500kHz
Efficiency
Power Loss
VIN (V)
6
8
10
12
14
16
88
91
94
97
100
6
7
8
9
10
(4–Phase Using TDA21470)
Input Voltage
Efficiency and Power Loss vs
3888-1 G03
VOUT_COMMAND = 1.0V
VOUT_SCALE_LOOP = 3.5
SERVO MODE DISABLED
TEMPERATURE (°C)
–40 –20
0
20
40
60
80 100 120
0.9950
0.9975
1.0000
1.0025
1.0050
Regulated Output vs Temperature
3888-1 G04
1047 UNITS
VOUT_COMMAND = 1.0V
SERVO MODE DISABLED
VOUT ERROR (mV)
–10 –8 –6 –4 –2 0
2
4
6
8 10
0
500
1000
1500
2000
2500
Distribution Without Servo
Typical Output Voltage
3888-1 G05
1047 UNITS
VOUT_COMMAND = 1.0V
SERVO MODE ENGAGED
VOUT ERROR (mV)
–2 –1.6 –1.2 –0.8 –0.4 0.0 0.4 0.8 1.2 1.6 2
0
500
1000
1500
2000
2500
Distribution With Servo
Typical Output Voltage
3888-1 G06
50s/DIV
VOUT
50mV/DIV
ITH
200mV/DIV
I(LO)
10AV/DIV
IOUT
40A/DIV
3888-1 G07
VIN = 12V
VOUT = 1.0V
10A TO 50A STEP
50s/DIV
3888-1 G08
VOUT
50mV/DIV
ITH
200mV/DIV
I(LO)
10A/DIV
IOUT
40A/DIV
VIN = 12V
VOUT = 1.0V
MFR_LOAD_EMULATION = 10A/PHASE
2s/DIV
VOUT
20mV/DIV
PWMO
2V/DIV
IOUT
40A/DIV
3888-1 G09
VIN = 12V
VOUT = 1.0V
SYNC = 500kHz
L = 215nH
VIN = 12V
at 500kHz
1.8V
2.5V
LOAD CURRENT (A)
0
10
20
30
40
50
70
75
80
85
90
95
100
(1-Phase Using TDA21470)
Efficiency vs Load Current
3888-1 G02



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