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参数资料
| 型号： | DC1453A |
| 厂商： | Linear Technology |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL LTM4619 |
| 软件下载： | LTM4619 Spice Model |
| 设计资源： | DC1453A Design Files DC1453A Schematic |
| 标准包装： | 1 |
| 系列： | LTM®, uModule® |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 1.8V，3.3V |
| 电流 - 输出： | 4A |
| 输入电压： | 4.5 ~ 28 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTM4619 |
| 相关产品： | LTM4619IV#PBF-ND - IC SWIT REG BUCK 4A ADJ 144LGA LTM4619EV#PBF-ND - IC SWIT REG BUCK 4A ADJ 144LGA |
LTM4619
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full internal
operating temperature range (Note 2), otherwise specifications are at T A = 25°C, V IN = 12V. Per typical application in Figure 18.
Specified as each channel. (Note 3)
SYMBOL
I INRUSH(VIN)
I Q(VIN)
I S(VIN)
INTV CC
PARAMETER
Input Inrush Current at Start-Up
Input Supply Bias Current
Input Supply Current
Internal V CC Voltage
CONDITIONS
I OUT = 0A, C IN = 10μF, C OUT = 100μF, V OUT = 2.5V
V IN = 12V
V IN = 12V, V OUT1 = 2.5V, Switching Continuous
V IN = 12V, V OUT2 = 2.5V, Switching Continuous
V IN = 26.5V, V OUT1 = 2.5V, Switching Continuous
V IN = 26.5V, V OUT2 = 2.5V, Switching Continuous
Shutdown, RUN = 0, V IN = 20V
V IN = 12V, V OUT = 2.5V, I OUT = 4A
V IN = 26.5V, V OUT = 2.5V, I OUT = 4A
V IN = 12V, V RUN > 2V, No Load
MIN
4.8
TYP
0.25
30
30
40
40
40
0.97
0.480
5
MAX
5.2
UNITS
A
mA
mA
mA
mA
μA
A
A
V
EXTV CC
EXTV CC Switchover Voltage
EXTV CC Ramping Positive
l
4.5
4.7
V
Output Specification s
I OUT1, 2(DC)
Output Continuous Current Range V IN = 12V, V OUT = 2.5V (Note 5)
0
4
A
Δ V OUT1(LINE)
V OUT(NOM)
Δ V OUT2(LINE)
V OUT(NOM)
Δ V OUT1(LOAD)
V OUT1(NOM)
Δ V OUT2(LOAD)
V OUT2(NOM)
V OUT1, 2(AC)
f S
Δ V OUTSTART
t START
Δ V OUTLS
t SETTLE
I OUTPK
Line Regulation Accuracy
Line Regulation Accuracy
Load Regulation Accuracy
Load Regulation Accuracy
Output Ripple Voltage
Output Ripple Voltage Frequency
Turn-On Overshoot
Turn-On Time
Peak Deviation for Dynamic Load
Settling Time for Dynamic Load
Step
Output Current Limit
V OUT = 2.5V, V IN from 6V to 26.5V
I OUT = 0A For Each Output
V OUT = 2.5V, V IN from 6V to 26.5V
I OUT = 0A For Each Output
For Each Output, V OUT = 2.5V, 0A to 4A (Note 5)
V IN = 12V
For Each Output, V OUT = 2.5V, 0A to 4A (Note 5)
V IN = 12V
I OUT = 0A, C OUT = 100μF X5R Ceramic
V IN = 12V, V OUT = 2.5V
V IN = 26.5V, V OUT = 2.5V
I OUT = 2A, V IN = 12V, V OUT = 2.5V
FREQ/PLLFLTR = INTV CC
C OUT = 100μF X5R Ceramic, V OUT = 2.5V, I OUT = 0A
V IN = 12V
V IN = 26.5V
C OUT = 100μF X5R Ceramic, V OUT = 2.5V, I OUT = 0A
Resistive Load,
V IN = 12V
V IN = 26.5V
Load: 0% to 50% to 0% of Full Load
C OUT = 100μF X5R Ceramic,V OUT = 2.5V, V IN = 12V
Load: 0% to 50% to 0% of Full Load
C OUT = 100μF X5R Ceramic,V OUT = 2.5V, V IN = 12V
C OUT = 100μF X5R Ceramic,
V IN = 6V, V OUT = 2.5V
V IN = 26.5V, V OUT = 2.5V
l
l
l
l
0.15
0.25
0.15
0.25
0.6
0.6
20
25
780
10
10
0.250
0.130
15
10
12
11
0.3
0.5
0.3
0.5
0.8
0.8
%
%
%
%
±%
±%
mV
mV
kHz
mV
mV
ms
ms
mV
μs
A
A
Control Section
V FB1 , V FB2
I TK/SS1, 2
Voltage at V FB Pin
Soft-Start Charge Current
I OUT = 0A, V OUT = 2.5V
V TK/SS = 0V, V OUT = 2.5V
l
0.792
0.788
0.9
0.8
0.8
1.3
0.808
0.810
1.7
V
μA
DF MAX
t ON(MIN)
Maximum Duty Factor
Minimum On-Time
In Dropout (Note 4)
(Note 4)
97
90
%
ns
4619fb
For more information www.linear.com/LTM4619
3
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