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参数资料
| 型号： | LM2576-12WT |
| 厂商： | Micrel Inc |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 12V 3A TO220-5 |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 12V |
| 输入电压： | 4 V ~ 40 V |
| 频率 - 开关： | 42kHz ~ 63kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-5 |
| 包装： | 管件 |
| 供应商设备封装： | TO-220-5 |
LM2576
Electrical Characteristics (continued)
LM2576
Micrel, Inc.
Units
Symbol
Parameter
Conditions
Typ
Limit
(Limits)
(Note 2)
ON/OFF CONTROL, FIXED and ADJUSTABLE REGULATORS Test Circuit Figure 1
V IH
V IL
I IH
I IL
ON/OFF Pin Logic
Input Level
ON /OFF Pin Logic
Current
V OUT = 0V
V OUT = 5V
ON /OFF Pin = 5V (OFF)
ON/OFF Pin = 0V (ON)
1.4
1.2
4
0.01
2.2/ 2.4
1.0/ 0.8
30
10
V(min)
V(max)
μ A
μ A(max)
μ A
μ A(max)
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Absolute Maximum Rating indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device
is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical
Characteristics.
All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face) . All room temperature limits are
100% production tested. All limits at temperature extreme are guaranteed via testing.
External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the
LM2576/LM1576 is used as shown in Figure 1 test circuit, system performance will be shown in system parameters section of Electrical
Characteristics.
Output (pin 2) sourcing current. No diode, inductor or capacitor connected to output.
Feedback (pin 4) removed from output and connected to 0V.
Feedback (pin 4) removed from output and connected to 12V to force the output transistor OFF.
Junction to ambient thermal resistance (no external heat sink) for the 5-lead TO-220 package mounted vertically, with 1/2" leads in a socket, or
on PC board with minimum copper area.
Junction to ambient thermal resistance (no external heat sink) for the 5-lead TO-220 package mounted vertically, with 1/4" leads soldered to PC
board containing approximately 4 square inches of copper area surrounding the leads.
Junction to ambient thermal resistance with approximately 1 square inch of pc board copper surrounding the leads. Additional copper will lower
thermal resistance further.
Typical Performance Characteristics
Normalized
Feedback Voltage*
Feedback Voltage
vs Duty Cycle*
2 5
2 0
1 5
1 0
5
0
- 5
-10
-15
-20
-25
VIN = 12V
ILOAD = 200mA
Normalized to TJ = 25 ? C
2 0
1 5
1 0
5
0
- 5
-10
-15
-20
ILOAD = 200 mA
VIN = 40V
VIN = 7 V
-75 -50 -25 0
25 50 75 100 125 150
0
2 0
40
6 0
80
100
JUNCTION TEMPERATURE ( ? C)
* Adjustable version only
DUTY CYCLE (% )
August 2005
5
M9999-082605-B
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相关代理商/技术参数 |
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|---|---|
| LM2576-12WU | 功能描述:直流/直流开关调节器 3A Step-Down SMPS Regulator (ROHS Compliant) 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 |
| LM2576-12WU TR | 功能描述:直流/直流开关调节器 3A Step-Down SMPS Regulator (ROHS Compliant) 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 |
| LM2576-15 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Easy Switcher 3.0A Step-Down Voltage Regulator |
| LM2576-15BT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-Mode SMPS Controller |
| LM2576-15BU | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-Mode SMPS Controller |
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