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ML4903CT 参数 Datasheet PDF下载

ML4903CT图片预览
型号: ML4903CT
PDF下载: 下载PDF文件 查看货源
内容描述: 高电流同步降压控制器 [High Current Synchronous Buck Controller]
分类和应用: 控制器
文件页数/大小: 12 页 / 163 K
品牌: MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
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ML4903
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which
the device could be permanently damaged. Absolute
maximum ratings are stress ratings only and functional
device operation is not implied.
V
DD ...........................................................................................
13.5V
V
CC ..................................................................................................
7V
Peak Driver Output Current ....................................... ±2A
V
FB
Voltage ...................................... GND - 0.3V to 5.5V
I
SENSE
Voltage .................................. GND - 0.5V to 5.5V
All Other Inputs .................... GND - 0.3V to V
DD
+ 0.3V
SHDN
Input Current .............................................. 100
m
A
Junction Temperature .............................................. 150°C
Storage Temperature Range ..................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ..................... 260°C
Thermal Resistance (
q
JA
) .................................... 100°C/W
OPERATING CONDITIONS
Temperature Range ....................................... 0°C to 70°C
V
DD
Range .............................................. 11.4V to 12.6V
V
CC
Range ............................................... 4.75V to 5.25V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, V
DD
= 12V, V
CC
=
SHDN
= 5V, T
A
= Operating Temperature Range (Note 1)
SYMBOL
REFERENCE
V
REF
Output Voltage
Line Regulation
UV LOCKOUT
V
DD
Start-up Threshold
V
DD
Hysteresis
V
CC
Start-up Threshold
V
CC
Hysteresis
SHUTDOWN
Input Low Voltage
Input High Voltage
Delay to Output
POWER GOOD COMPARATOR
Output Voltage in Regulation
Output Voltage out of Regulation
Output Voltage in Shutdown
BUCK REGULATOR
Oscillator Frequency
Duty Cycle Ratio
RANGE = 1, V
FB
= 0V,
DAC (D3-D0) Code = 0100
RANGE = 1, V
FB
> 3.193V,
DAC (D3-D0) Code = 0100
DAC (RANGE, D3-D0) Input Low Voltage
DAC (RANGE, D3-D0) Input High Voltage
2.0
160
80
200
230
98
0
0.8
kHz
%
%
V
V
5k
W
pull-up to 5V
V
FB
< 90% V
DAC
or >110% V
DAC
SHDN
= 0V, 5k
W
pull-up to 5V
4.8
0.4
0.4
V
V
V
2.0
50
0.8
V
V
ns
10.0
300
4.25
300
10.5
450
4.4
400
10.8
600
4.6
500
V
mV
V
mV
11V < V
DD
< 13V
3.51
3.535
0.5
3.56
V
mV/V
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
3