LTC3882-1
10
Rev A
For more information
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 C
OUT
= 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)
V
IN
(V)
5
EFFICIENCY (%)
100
98
96
94
92
90
88
86
84
82
80
POWERLOSS (W)
3.0
2.0
1.0
2.5
1.5
0.5
0
20
10
25
15
38821 G12
30
V
O
= 1.8V
POWER FET: BSC050N04LS G
SYNC FET: BSC010N04LS
V
OUT0
(1-PHASE)
20mV/DIV
V
OUT1
(3-PHASE)
20mV/DIV
I
OUT1
10A/DIV
100µs/DIV
38821 G15
25%
LOAD STEP
V
OUT
50mV/DIV
I
O
10A/DIV
200µs/DIV
38821 G16
V
OUT
10mV/DIV
V
IN
2V/DIV
7V
1.8V
200µs/DIV
38821 G17
100µs/DIV
V
OUT
(10mV/DIV)
I
OUT
(10A/DIV)
38821 G13
V
OUT
= 0.9V/90A
V
IN
= 12V
SYNC = 500kHz
L = 210nH
25mV
P-P
2µs/DIV
I
OUT
(10A/DIV)
V
SW
(10V/DIV)
V
OUT
(20mV/DIV)
38821 G14
V
OUT
= 1V/25A
V
IN
= 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
PHASE CURRENT (A)
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
I
L1
, I
L2
10A/DIV
V
OUT
20mV/DIV
I
OUT
20A/DIV
5µs/DIV
V
OUT
= 1V
V
IN
= 12V
SYNC = 500kHz
L = 320nH
38821 G10
I
L1
, I
L2
10A/DIV
V
OUT
20mV/DIV
I
OUT
20A/DIV
5µs/DIV
V
OUT
= 1V
V
IN
= 12V
SYNC = 500kHz
L = 320nH
38821 G11
