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参数资料
| 型号： | DC1663A |
| 厂商： | Linear Technology |
| 文件页数： | 3/36页 |
| 文件大小： | 0K |
| 描述： | DEMO BOARD LTM4628 |
| 软件下载： | LTM4628 Spice Model |
| 设计资源： | LTM4628 Gerber Files DC1663A Design Files |
| 标准包装： | 1 |
| 系列： | µModule® |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 1.2V，1.5V |
| 电流 - 输出： | 8A，8A |
| 输入电压： | 4.5 ~ 26.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 400kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTM4628 |
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LTM4628
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full internal
operating temperature range (Note 2). Specified as each individual output channel. T A = 25°C, V IN = 12V and V RUN1 , V RUN2 at 5V
unless otherwise n oted, per the typical application i n Figure 28.
SYMBOL
V IN
V OUT
PARAMETER
Input DC Voltage
Output Voltage
CONDITIONS
l
l
MIN
4.5
0.6
TYP
MAX
26.5
5.5
UNITS
V
V
V OUT1(DC) ,
V OUT2(DC)
Output Voltage, Total Variation with
Line and Load
C IN = 22μF × 3, C OUT = 100μF × 1
Ceramic, 470μF POSCAP, MODE_PLLIN =
GND, RFB1, RFB2 = 40.2k, V IN = 4.5V to 26.5V, l
I OUT = 0A to 8A
1.477
1.5
1.523
V
Input Specifications
V RUN1 , V RUN2
RUN Pin On/Off Threshold
RUN Rising
1.1
1.25
1.40
V
V RUN1HYS , V RUN2HYS RUN Pin On Hysteresis
150
mV
I INRUSH(VIN)
I Q(VIN)
I S(VIN)
Input Inrush Current at Start-Up
Input Supply Bias Current
Input Supply Current
I OUT = 0A, C IN = 22μF × 3,
C OUT = 100μF , 470μF POSCAP V OUT1 = 1.5V,
V OUT2 = 1.5V, V IN = 12V, TRACK = 0.01μF
V IN = 12V, V OUT = 1.5V, Burst Mode Operation
V IN = 12V, V OUT = 1.5V, Pulse-Skipping Mode
V IN = 12V, V OUT = 1.5V, Switching Continuous
Shutdown, RUN = 0, V IN = 12V
V IN = 4.75V, V OUT = 1.5V, I OUT = 8A
V IN = 12V, V OUT = 1.5V, I OUT = 8A
V IN = 26.5V, V OUT = 1.5V, I OUT = 8A
1
5
15
65
60
2.9
1.18
0.575
A
mA
mA
mA
μA
A
A
A
Output Specifications
I OUT1(DC) , I OUT2(DC)
Output Continuous
Current Range
V IN = 12V, V OUT = 1.5V (Note 7)
0
8
A
ΔV OUT1(LINE) /V OUT1
ΔV OUT2(LINE) /V OUT2
Line Regulation Accuracy
V OUT = 1.5V, V IN from 4.5V to 26.5V
I OUT = 0A for Each Output,
l
0.010
0.04
%/V
ΔV OUT1(LOAD) /V OUT1 Load Regulation Accuracy
ΔV OUT2(LOAD) /V OUT2
V OUT1(AC) , V OUT2(AC) Output Ripple Voltage
For Each Output, V OUT = 1.5V, 0A to 8A
V IN = 12V (Note 7)
I OUT = 0A, C OUT = 100μF X5R Ceramic,
470μF POSCAP
V IN = 12V, V OUT = 1.5V
l
0.15
15
0.3
%
mV P-P
f S (Each Channel)
f SYNC
(Each Channel)
ΔV OUTSTART
(Each Channel)
t START
(Each Channel)
ΔV OUT(LS)
(Each Channel)
Output Ripple Voltage Frequency
SYNC Capture Range
Turn-On Overshoot
Turn-On Time
Peak Deviation for Dynamic Load
V IN = 12V, V OUT = 1.5V, f SET = 2.5V (Note 4)
C OUT = 100μF X5R Ceramic, 470μF POSCAP,
V OUT = 1.5V, I OUT = 0A V IN = 12V
C OUT = 100μF X5R Ceramic, 470μF POSCAP,
No Load, TRACK/SS with 0.01μF to GND,
V IN = 12V
Load: 0% to 50% to 0% of Full Load
C OUT = 22μF × 3 X5R Ceramic, 470μF POSCAP
V IN = 12V, V OUT = 1.5V
400
780
10
5
30
780
kHz
kHz
mV
ms
mV
t SETTLE
(Each Channel)
Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load,
V IN = 12V, C OUT = 100μF, C OUT = 470μF
20
μs
I OUT(PK)
(Each Channel)
Output Current Limit
V IN = 12V, V OUT = 1.5V
15
A
Control Section
V FB1 , V FB2
I FB1 , I FB2
V OVL
Voltage at V FB Pins
Leakage Current of V FB1 , V FB2
Feedback Overvoltage Lockout
I OUT = 0A, V OUT = 1.5V
(Note 6)
l
l
0.592
0.64
0.600
–5
0.66
0.606
–20
0.68
V
nA
V
4628fe
For more information www.linear.com/LTM4628
3
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