Application Note 1822
AN1822.1
May 7, 2015
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4
Board Electrical Specifications
T
A
= +25°C; V
IN
= 12V; V
OUT1
= 3.3V, V
OUT2
= 5V, and I
OUT1
= 15A, I
OUT2
= 15A
(unless otherwise noted).
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
IN
Input Range
Over I
O
range
10.8
13.2
V
V
OUT1
Output
Range
Over
I
O
range
4.8
5
5.2
V
I
O1
Output Current
From no load to full load
0
20
A
V
OUT2
Output
Range
Over
I
O
range
3.1
3.3
3.5
V
I
O2
Output Current
From no load to full load
0
20
A
η
Efficiency for DC/DC
V
IN
= 12V
(
Note 1
)
I
OUT1
= I
OUT2
= 2A
93.39
%
I
OUT1
= I
OUT2
= 4A
95.18
%
I
OUT1
= I
OUT2
= 8A
95.87
%
I
OUT1
= I
OUT2
= 12A
95.53
%
I
OUT1
= I
OUT2
= 16A
94.88
%
I
OUT1
= I
OUT2
= 20A
93.99
%
V
r1
V
OUT1
Ripple (Peak-to-peak)
No load
30
mV
P-P
Full load
50
mV
P-P
V
r2
V
OUT2
Ripple (Peak-to-peak)
No load
30
mV
P-P
Full Load
50
mV
P-P
V
T1
Transient (Peak-to-peak)
Output peak-to-peak voltage variation when
output current changing from 5A to 10A with
2.5A/µs slew rate
250
mV
V
T2
Transient (Peak-to-peak)
Output peak-to-peak voltage variation when
output current changing from 5A to 10A with
2.5A/µs slew rate
250
mV
Fs Switching
Frequency
Over
V
IN
and Io range
280
kHz
NOTE:
1. For the efficiency test result please refer to
page 11
.
