参数资料
| 型号： | MIC4574BN |
| 厂商： | Micrel Inc |
| 文件页数： | 3/7页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.5A 8DIP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 20 V |
| 输入电压： | 4 V ~ 24 V |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
MIC4574
Absolute Maximum Ratings (Note 1)
Supply Voltage (V IN ), Note 5 ...................................... +40V
Shutdown (V SHDN ) ....................................... –0.3V to +36V
Output Switch (V SW ) steady state ................................. –1V
Micrel, Inc.
Operating Ratings (Note 2)
Supply Voltage (V IN ) ................................................... +24V
Package Thermal Resistance
θ JA Plastic DIP .................................................. 130 ° C/W
Junction Temperature (T J ) ...................................... +150 ° C
Storage Temperature ............................... –65 ° C to +150 ° C
ESD Rating, Note 3
Electrical Characteristics (Note 4)
V IN =12V; I LOAD = 100mA; T A = 25 ° C, bold values indicate –40 ° C ≤ T A ≤ +85 ° C; unless noted
Parameter
Condition
Min
Typ
Max
Units
MIC4574 [Adjustable]
Feedback Voltage
1.217
1.230
1.243
V
Feedback Voltage
8V ≤ V IN ≤ 24V, 0.1A ≤ I LOAD ≤ 0.5A
1.193
1.230
1.267
V
1.180
1.280
V
Efficiency
I LOAD = 0.5A, V OUT = 5V
77
%
Feedback Bias Current
50
100
500
nA
nA
MIC4574-3.3
Output Voltage
3.234
3.3
3.366
V
Output Voltage
6V ≤ V IN ≤ 24V, 0.1A ≤ I LOAD ≤ 0.5A
3.168
3.3
3.432
V
Efficiency
MIC4574-5.0
3.135
72
3.465
V
%
Output Voltage
4.900
5.0
5.100
V
Output Voltage
8V ≤ V IN ≤ 24V, 0.1A ≤ I LOAD ≤ 0.5A
4.800
5.0
5.200
V
Efficiency
MIC4574 / -3.3 / -5.0
4.750
77
5.250
V
%
Oscillator Frequency
Saturation Voltage
I OUT = 0.5A
180
200
1
220
1.3
kHz
V
1.5
V
Maximum Duty Cycle (On)
FB connected to 0V
90
95
%
Current Limit
Peak Current, t ON ≤ 3 μ s
0.7
1.0
1.6
A
Output Leakage Current
V IN = 24V, FB connected to 6V
0.65
1.8
A
Quiescent Current
Output = 0V
Output = –1V
0
7.5
5
2
35
10
mA
mA
mA
Standby Quiescent Current
SHDN = 5V (regulator off)
50
200
μ A
SHDN Input Logic Level
V OUT = 0V (regulator off)
2.2
1.4
V
2.4
V
V OUT = 3.3V or 5V (regulator on)
1.2
1.0
0.8
V
V
SHDN Input Current
SHDN = 5V (regulator off)
4
30
μ A
SHDN = 0V (regulator on)
–10
0.01
10
μ A
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
Specification for packaged product only.
The MIC4574 is not guaranteed to survive a short circuit to ground for input voltage above 24V.
June 2005
3
M9999-062105
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| MIC4574BWM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC4574YN | 功能描述:直流/直流开关调节器 200kHz 0.5A Step-down Regulator (Lead Free) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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