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参数资料
| 型号： | MIC3172YN |
| 厂商： | Micrel Inc |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST INV CUK 8DIP |
| 标准包装： | 50 |
| 类型： | 降压（降压），升压（升压），反相，Cuk |
| 输出数： | 1 |
| 输入电压： | 3 V ~ 40 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz |
| 电流 - 输出： | 1.25A |
| 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 |
| 产品目录页面： | 1093 (CN2011-ZH PDF) |
| 其它名称： | 576-2255 MIC3172YN-ND |
Micrel
Absolute Maximum Ratings MIC2172
Input Voltage.................................................................. 40V
Switch Voltage ............................................................... 65V
Sync Current............................................................... 50mA
Feedback Voltage (Transient, 1ms) ............................ ± 15V
Operating Temperature Range
8-pin PDIP .................................................–40 to +85 ° C
8-pin SOIC ................................................–40 to +85 ° C
Electrical Characteristics MIC2172
Note 1, 3. Unless otherwise specified, V IN = 5V.
MIC2172/3172
Junction Temperature................................–55 ° C to +150 ° C
Thermal Resistance
θ JA 8-pin PDIP ................................................. 130°C/W
θ JA 8-pin SOIC................................................. 120 ° C/W
Storage Temperature ................................–65 ° C to +150 ° C
Soldering (10 sec.) ...................................................+300 ° C
Parameter
Condition
Min
Typ
Max
Units
Reference Section
Pin 2 tied to pin 3
Feedback Voltage (V FB )
Feedback Voltage Line
3V ≤ V IN ≤ 40V
1.220
1.214
1.240
1.264
1.274
0.03
V
V
%/V
Regulation
Feedback Bias Current
(I FB )
310
750
1100
nA
nA
Error Amplifier Section
Transconductance
( ? I COMP / ? V FB )
Voltage Gain
( ? V COMP / ? V FB )
Output Current
? I COMP = ±25μA
0.9V ≤ V COMP ≤ 1.4V
V COMP = 1.5V
3.0
2.4
500
125
3.9
800
175
6.0
7.0
2000
350
μA/mV
μA/mV
V/V
μA
100
400
μA
Output Swing
Compensation Pin
Threshold
High Clamp, V FB = 1V
Low Clamp, V FB = 1.5V
Duty Cycle = 0
1.8
0.25
0.8
0.6
2.1
0.35
0.9
2.3
0.52
1.08
1.25
V
V
V
V
Output Switch Section
ON Resistance
Current Limit
I SW = 1A, V FB = 0.8V
Duty Cycle = 50%, T J ≥ 25°C
Duty Cycle = 50%, T J < 25°C
Duty Cycle = 80%, Note 2
1.25
1.25
1
0.76
1
1.1
3
3.5
2.5
?
?
A
A
A
Breakdown Voltage (BV)
3V ≤ V IN ≤ 40V
65
75
V
I SW = 5mA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
4. Specification for packaged product only.
April 2006
4
M9999-041806
(408) 955-1690
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