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LTC3884 Datasheet(PDF) 7 Page - Analog Devices

Part # LTC3884
Description  Quad Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management
PDF  26 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC3884 Datasheet(HTML) 7 Page - Analog Devices

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LTC7883
7
Rev. 0
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
(1-Phase Using D12S1R880A
Power Block)
Typical LTC7883 Output Voltage
Distribution at 0°C
Efficiency and Loss vs Load
(2-Phase Using FDMF5820DC
DrMOS)
LTC7883 1.0V Regulated Output
vs Temperature
Efficiency and Loss vs Load
(4-Phase Using LTC7051)
Typical LTC78883 Output Voltage
Distribution at 105°C
LOAD CURRENT (A)
0
95
90
80
85
75
10
20
30
7883 G05
40
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
VIN = 12V
LOAD CURRENT (A)
0
7883 G06
VIN = 12V
VOUT = 1V
EFFICIENCY
POWER LOSS
EFFICIENCY 500kHz
EFFICIENCY 1MHz
POWER LOSS 500kHz
POWER LOSS 1MHz
20 40 60 80 100 120 140 160 180 200
60
65
70
75
80
85
90
95
2
9
16
23
30
37
44
51
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
7883 G07
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
7883 G08
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
7883 G09
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
7883 G04
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
7883 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
7883 G02
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
7883 G03
2.5
0
–2
–1 –0.5
–1.5



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