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LTC4449 Datasheet(PDF) 10 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) 10 Page - Linear Technology

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LTC3882-1
10
Rev A
For more information www.analog.com
Efficiency and Power Loss vs
Input Voltage
(1-Phase Using LTC4449)
3-Phase Transient Response
(Using D12S1R860A Power Block)
1-Phase Single Cycle Response
(Using D12S1R860A Power Block
with COUT = 6 × 100µF X5R 1210)
TYPICAL PERFORMANCE CHARACTERISTICS
3+1 Channel Crosstalk
(Using D12S1R845A Power
Blocks)
Load Step Transient Response
Using AVP
Line Step Transient Response
(1-phase Using LTC4449)
VIN (V)
5
100
98
96
94
92
90
88
86
84
82
80
3.0
2.0
1.0
2.5
1.5
0.5
0
20
10
25
15
38821 G12
30
VO = 1.8V
POWER FET: BSC050N04LS G
SYNC FET: BSC010N04LS
VOUT0
(1-PHASE)
20mV/DIV
VOUT1
(3-PHASE)
20mV/DIV
IOUT1
10A/DIV
100µs/DIV
38821 G15
25%
LOAD STEP
VOUT
50mV/DIV
IO
10A/DIV
200µs/DIV
38821 G16
VOUT
10mV/DIV
VIN
2V/DIV
7V
1.8V
200µs/DIV
38821 G17
100µs/DIV
VOUT
(10mV/DIV)
IOUT
(10A/DIV)
38821 G13
VOUT = 0.9V/90A
VIN = 12V
SYNC = 500kHz
L = 210nH
25mVP-P
2µs/DIV
IOUT
(10A/DIV)
VSW
(10V/DIV)
VOUT
(20mV/DIV)
38821 G14
VOUT = 1V/25A
VIN = 12V
SYNC = 1MHz
L = 210nH
3-Phase DC Output Current
Sharing (Using D12S1R845A
Power Block
Load Step Transient Current
Sharing (Using FDMF6707B
DrMOS)
Load Dump Transient Current
Sharing (Using FDMF6707B
DrMOS)
TOTAL RAIL CURRENT (A)
0
20
2
18
14
10
6
16
12
8
4
0
60
70
38821 G09
80
50
20
40
10
30
CHANNEL 1
CHANNEL 2
CHANNEL 3
IL1, IL2
10A/DIV
VOUT
20mV/DIV
IOUT
20A/DIV
5µs/DIV
VOUT = 1V
VIN = 12V
SYNC = 500kHz
L = 320nH
38821 G10
IL1, IL2
10A/DIV
VOUT
20mV/DIV
IOUT
20A/DIV
5µs/DIV
VOUT = 1V
VIN = 12V
SYNC = 500kHz
L = 320nH
38821 G11



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