Linear Technology DC1297B - LTM4612EV Demo Board | EN55022B Compliant DC1297B DC1297B 데이터 시트
제품 코드
DC1297B
LTM4612
3
4612fb
elecTrical characTerisTics
The
l
denotes the specifications which apply over the specified internal
operating temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 24V, unless otherwise noted (Note 2). Per Typical
Application (front page) configuration.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
Q(VIN)
Input Supply Bias Current
V
IN
= 36V, V
OUT
= 12V, Switching Continuous
V
IN
= 24V, V
OUT
= 12V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 36V
57
48
50
mA
mA
µA
I
S(VIN)
Input Supply Current
V
IN
= 36V, V
OUT
= 12V, I
OUT
= 5A
V
IN
= 24V, V
OUT
= 12V, I
OUT
= 5A
1.85
2.72
A
A
V
INTVCC
Internal V
CC
Voltage
V
IN
= 36V, RUN > 2V, I
OUT
= 0A
4.7
5
5.3
V
Output Specifications
I
I
OUT(DC)
Output Continuous Current Range
V
IN
= 24V, V
OUT
= 12V (Note 4)
0
5
A
DV
OUT(LINE)
V
OUT
Line Regulation Accuracy
V
OUT
= 12V, FCB = 0V, V
IN
= 22V to 36V,
I
OUT
= 0A
l
0.05
0.3
%
DV
OUT(LOAD)
V
OUT
Load Regulation Accuracy
V
OUT
= 12V, FCB = 0V, I
OUT
= 0A to 5A (Note 4)
V
IN
= 36V
V
IN
= 24V
l
l
0.3
0.3
0.6
0.6
%
%
V
IN(AC)
Input Ripple Voltage
I
OUT
= 0A,
C
IN
= 2 × 10µF X5R Ceramic and 1 × 100µF
Electrolytic, 1 × 10µF X5R Ceramic on V
D
Pins
V
IN
= 24V, V
OUT
= 5V
V
IN
= 24V, V
OUT
= 12V
7.2
3.4
mV
P-P
mV
P-P
V
OUT(AC)
Output Ripple Voltage
I
OUT
= 0A,
C
OUT
= 2 × 22µF, 2 × 47µF X5R Ceramic
V
IN
= 24V, V
OUT
= 5V
V
IN
= 24V, V
OUT
= 12V
17.5
12.5
mV
P-P
mV
P-P
f
S
Output Ripple Voltage Frequency
I
OUT
= 1A, V
IN
= 24V, V
OUT
= 12V
940
kHz
DV
OUT(START)
Turn-On Overshoot,
TRACK/SS = 10nF
C
OUT
= 200µF, V
OUT
= 12V, I
OUT
= 0A
V
IN
= 36V
V
IN
= 24V
20
20
mV
mV
t
START
Turn-On Time, TRACK/SS = Open
C
OUT
= 300µF, V
OUT
= 12V, I
OUT
= 1A
Resistive Load
V
IN
= 36V
V
IN
= 24V
0.5
0.5
ms
ms
DV
OUT(LS)
Peak Deviation for Dynamic Load
Load: 0% to 50% to 0% of Full Load
C
OUT
= 2 × 22µF Ceramic, 150µF Bulk
V
IN
= 24V, V
OUT
= 12V
153
mV
t
SETTLE
Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load, V
IN
= 24V
37
µs
I
OUT(PK)
Output Current Limit
C
OUT
= 200µF
V
IN
= 36V, V
OUT
= 12V
V
IN
= 24V, V
OUT
= 12V
9
9
A
A
Control Section
V
V
FB
Voltage at V
FB
Pin
I
OUT
= 0A, V
OUT
= 12V
l
0.591
0.6
0.609
V
V
RUN
RUN Pin On/Off Threshold
1
1.5
1.9
V
I
SS / TRACK
Soft-Start Charging Current
V
SS/TRACK
= 0V
–1
–1.5
–2
µA
V
FCB
Forced Continuous Threshold
0.57
0.6
0.63
V
I
FCB
Forced Continuous Pin Current
V
FCB
= 0V
–1
–2
µA
t
ON(MIN)
Minimum On-Time
(Note 3)
50
100
ns
t
OFF(MIN)
Minimum Off-Time
(Note 3)
250
400
ns
R
PLLIN
PLLIN Input Resistor
50
kW