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| 型号： | MIC2171WU |
| 厂商： | Micrel Inc |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG 2.5A TO263-5 |
| 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： | 2.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 包装： | 管件 |
| 供应商设备封装： | TO-263-5 |
| 产品目录页面： | 1092 (CN2011-ZH PDF) |
| 其它名称： | 576-1063 |
Micrel, Inc.
Absolute Maximum Ratings
Supply Voltage (V IN ) .......................................................40V
Switch Voltage (V SW )......................................................65V
Feedback Voltage (transient, 1ms) (V FB ) .....................±15V
Lead Temperature (soldering, 10 sec.)...................... 300°C
Storage Temperature (T s ) ......................... –65°C to +150°C
ESD Rating (1)
MIC2171
Operating Ratings
Operating Temperature Range ................... –40°C to +85°C
Junction Temperature (T J ) ........................ –55°C to +150°C
Thermal Resistance
TO-220-5 ( θ JA ) (2) ...............................................45°C/W
TO-263-5 ( θ JA ) (3) ................................................45°C/W
Electrical Characteristics
V IN = 5V; T A = 25°C, bold values indicate –40°C< T A < +85°C, unless noted.
Parameter
Condition
Min
Typ
Max
Units
Reference Section
Feedback Voltage (V FB )
Feedback Voltage
Line Regulation
Feedback Bias Current (I FB )
V COMP = 1.24V
3V ≤ V IN ≤ 40V
V COMP = 1.24V
V FB = 1.24V
1.220
1.214
1.240
0.6
310
1.264
1.274
750
1100
V
V
%/V
nA
nA
Error Amplifier Section
Transconductance (g m )
Voltage Gain (A V )
Output Current
Output Swing
Compensation Pin Threshold
? I COMP = ±25μA
0.9V ≤ V COMP ≤ 1.4V
V COMP = 1.5V
High Clamp, V FB = 1V
Low Clamp, V FB = 1.5V
Duty Cycle = 0
3.0
2.4
400
125
100
1.8
0.25
0.8
3.9
800
175
2.1
0.35
0.9
6.0
7.0
2000
350
400
2.3
0.52
1.08
μA/mV
μA/mV
V/V
μA
μA
V
V
V
Output Switch Section
0.6
1.25
V
ON Resistance
I SW = 2A, V FB = 0.8V
0.37
0.50
0.55
?
?
Current Limit
Breakdown Voltage (BV)
Duty Cycle = 50%, T J ≥ 25°C
Duty Cycle = 50%, T J < 25°C
Duty Cycle = 80%, Note 4
3V ≤ V IN ≤ 40V
I SW = 5mA
2.5
2.5
2.5
65
3.6
4.0
3.0
75
5.0
5.5
5.0
A
A
A
V
Oscillator Section
Frequency (f O )
Duty Cycle [ δ (max)]
88
85
80
100
90
112
115
95
kHz
kHz
%
Input Supply Voltage Section
Minimum Operating Voltage
2.7
3.0
V
Quiescent Current (I Q )
Supply Current Increase ( ? I IN )
3V ≤ V IN ≤ 40V, V COMP = 0.6V, I SW = 0
? I SW = 2A, V COMP = 1.5V, during switch on-time
7
9
9
20
mA
mA
Notes:
1. Devices are ESD sensitive. Handling precautions recommended.
2. Mounted vertically, no external heat sink, 1/4 inch leads soldered to PC board containing approximately 4 inch squared copper area surrounding
leads.
3. All ground leads soldered to approximately 2 inches squared of horizontal PC board copper area.
4. For duty cycles ( δ ) between 50% and 95%, minimum guaranteed switch current is I CL = 1.66 (2- δ ) Amp (Pk).
May 2007
3
M9999-051107
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