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LTC4449 Datasheet(PDF) 9 Page - Linear Technology

Part # LTC4449
Description  Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management
PDF  108 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4449 Datasheet(HTML) 9 Page - Linear Technology

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LTC3882-1
9
Rev A
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
(1-Phase Using D12S1R880A
Power Block)
Typical LTC3882-1 Output Voltage
Distribution at 0°C
Efficiency and Loss vs Load
(2-Phase Using FDMF5820DC
DRMOS)
LTC3882-1 1.0V Regulated Output
vs Temperature
Efficiency vs Load Current
(3-Phase Using D12S1R845A
Power Block)
Typical LTC3882-1 Output Voltage
Distribution at 105°C
LOAD CURRENT (A)
0
95
90
80
85
75
10
20
30
38821 G04
40
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
VIN = 12V
LOAD CURRENT (A)
0
94
92
88
84
90
86
82
80
40
20
60
38821 G05
70
30
10
50
VIN = 12V
VOUT = 1.5V
Typical Distribution of Slave
IOUT Offset (Not Including DCR
Mismatch)
Typical Distribution of Slave
IOUT Offset (Not Including DCR
Mismatch)
Typical Distribution of Slave
IOUT Offset (Not Including DCR
Mismatch)
4000
3500
2500
1500
500
3000
2000
1000
0
38821 G06
CH1 ISENSE OFFSET TO IDEAL (µV)
–400
400
300
200
100
–300–200–100 0
9595 UNITS
FROM 3 LOTS
TA = –40°C
TJ = –22°C
CHO MASTER
3500
2500
1500
500
3000
2000
1000
0
38821 G07
CH1 ISENSE OFFSET TO IDEAL (µV)
–400
400
300
200
100
–300–200–100 0
8593 UNITS
FROM 3 LOTS
TJ = 38°C
CHO MASTER
4500
2500
1500
500
4000
3500
3000
2000
1000
0
38821 G08
CH1 ISENSE OFFSET TO IDEAL (µV)
–300
500
400
300
200
100
–200–100 0
11783 UNITS
FROM 3 LOTS
TJ = 121°C
CHO MASTER
LOAD CURRENT (A)
0
92
90
88
86
84
82
91
89
87
85
83
81
80
13
9
5
11
7
3
1
20
10
30
38821 G03
80
70
60
50
40
VIN = 12V
VOUT = 1V
SYNC = 500kHz
TA (°C)
–5
1.001
1.0005
0.9995
1.0
0.999
0.9985
95
38821 G01
75
15
55
35
VIN = 12V
VOUT_COMMAND = 1.0V
DIGITAL SERVO ENGAGED
IOUT = 6.5A
1000
900
700
500
300
200
100
800
600
400
0
38821 G01a
VOUT ERROR (mV)
–1.25
1 1.25
0.75
0.5
0.25
–1 –0.75–0.5–0.25 0
1094 UNITS
VOUT_COMMAND = 1.0V
DIGITAL SERVO
ENGAGED
1078 UNITS
VOUT_COMMAND = 1.0V
DIGITAL SERVO
ENGAGED
VOUT ERROR (mV)
–2.5
1200
1000
600
200
800
400
0
0.5 1 1.5 2
38821 G02
2.5
0
–2
–1 –0.5
–1.5



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