参数资料
| 型号： | MIC4684BM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 8SOIC |
| 标准包装： | 2,500 |
| 系列： | SuperSwitcher™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 1.235V |
| 输入电压： | 4 V ~ 30 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
| 其它名称： | MIC4684BMTR MIC4684BMTR-ND |
MIC4684
Absolute Maximum Ratings (Note 1)
Supply Voltage (V IN ), Note 3 ....................................... +34V
Enable Voltage (V EN )...................................... –0.3V to +V IN
Steady-State Output Switch Voltage (V SW ) ......... –1V to V IN
Feedback Voltage (V FB ) .............................................. +12V
Storage Temperature (T S ) ........................ –65°C to +150°C
ESD Rating ............................................................... Note 3
Electrical Characteristics
Micrel, Inc.
Operating Ratings (Note 2)
Supply Voltage (V IN ) Note 4 ............................ +4V to +30V
Ambient Temperature (T A ) .......................... –40°C to +85°C
Junction Temperature (T J ) ........................ –40°C to +125°C
Package Thermal Resistance
θ JA , Note 5 .......................................................... 75°C/W
θ JC , Note 5 .......................................................... 25°C/W
V IN = V EN = 12V, V OUT = 5V; I OUT = 500mA; T A = 25°C, unless otherwise noted. Bold values indicate –40°C ≤ T J ≤ +125°C.
Parameter Condition Min Typ Max
Units
Feedback Voltage
(±2%)
(±3%)
8V ≤ V IN ≤ 30V, 0.1A ≤ I LOAD ≤ 1A, V OUT = 5V
1.210
1.198
1.186
1.173
1.235
1.235
1.260
1.272
1.284
1.297
V
V
V
V
Feedback Bias Current
50
nA
Maximum Duty Cycle
Output Leakage Current
Quiescent Current
Bootstrap Drive Current
Bootstrap Voltage
Frequency Fold Back
Oscillator Frequency
Saturation Voltage
Short Circuit Current Limit
Shutdown Current
Enable Input Logic Level
V FB = 1.0V
V IN = 30V, V EN = 0V, V SW = 0V
V IN = 30V, V EN = 0V, V SW = –1V
V FB = 1.5V
V FB = 1.5V, V SW = 0V
I BS = 10mA, V FB = 1.5V, V SW = 0V
V FB = 0V
I OUT = 1A
V FB = 0V, See Test Circuit
V EN = 0V
regulator on
250
5.5
30
180
2.2
2
94
5
1.4
6
380
6.2
50
200
0.59
150
500
20
12
120
225
%
μA
mA
mA
mA
V
kHz
kHz
V
A
μ A
V
regulator off
0.8
V
Enable Pin Input Current
Thermal Shutdown @ T J
V EN = 0V (regulator off)
V EN = 12V (regulator on)
–1
16
–0.83
160
50
μA
mA
°C
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.
2.5V of headroom is required between V IN and V OUT . The headroom can be reduced by implementing a feed-forward diode a seen on the 5V
to 3.3V circuit on page 1.
Measured on 1” square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.
January 2010
3
M9999-012610
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| MIC4684YM | 功能描述:直流/直流开关调节器 SO-8 Efficient Simple Buck 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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