LM2575 1A 简单步降开关稳压器，可调节
|
LM2575 |
| Iout(Max)(A) |
1 |
| Vin(Min)(V) |
4.75 |
| Vin(Max)(V) |
40 |
| Vout(Min)(V) |
1.23 |
| Vout(Max)(V) |
37 |
| Preset Vout(V) |
1.23 |
| Iq(Typ)(mA) |
5 |
| Switching Frequency(Typ)(kHz) |
52 |
| Switch Current Limit(Typ)(A) |
3.2 |
| Topology |
Buck |
| Operating Temperature Range(°C) |
-40 to 125 |
| Pin/Package |
16PDIP |
| Rating |
Catalog |
| Duty Cycle(Max)(%) |
98 |
| Regulated Outputs(#) |
1 |
| Thermal Shutdown |
Yes |
LM2575 描述
The LM2575 greatly simplifies the design of switching power supplies by conveniently providing all the active functions needed for a step-down (buck) switching regulator in an integrated circuit. Accepting a wide input voltage range and available in an adjustable output version, the LM2575 has an integrated switch capable of delivering 1 A of load current, with excellent line and load regulation. The device also offers internal frequency compensation, a fixed-frequency oscillator, cycle-by-cycle current limiting, and thermal shutdown. In addition, a manual shutdown is available via an external ON/OFF pin.
The LM2575 represents a superior alternative to popular three-terminal linear regulators. Due to its high efficiency, it significantly reduces the size of the heat sink and, in many cases, no heat sink is required. Optimized for use with standard series of inductors available from several different manufacturers, the LM2575 greatly simplifies the design of switch-mode power supplies by requiring a minimal addition of only four to six external components for operation.
The LM2575 is characterized for operation over the virtual junction temperature range of -40°C to 125°C
LM2575 特性
- Adjustable With a Range of 1.23 V to 37 V and ±4% Regulation (Max) Over Line, Load, and Temperature Conditions
- Specified 1-A Output Current
- Wide Input Voltage Range. . .4.75 V to 40 V
- Uses Readily Available Standard Inductors
- 52-kHz (Typ) Fixed-Frequency Internal Oscillator
- TTL Shutdown Capability With 50-µA (Typ) Standby Current
- High Efficiency. . .as High as 88% (Typ)
- Thermal Shutdown and Current-Limit Protection With Cycle-by-Cycle Current Limiting
- For the Full Offering of Voltages (Including Fixed-Output Options) and Packages (Including TO-263), see TL2575 Datasheet
- APPLICATIONS
- Simple High-Efficiency Step-Down (Buck) Regulator
- Pre-Regulator for Linear Regulators
- On-Card Switching Regulators
- Positive-to-Negative Converter (Buck-Boost)
LM2575 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| LM2575IN |
ACTIVE |
-40 to 125 |
1.35 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
LM2575IN |
| LM2575INE4 |
ACTIVE |
-40 to 125 |
1.35 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
LM2575IN |
LM2575 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| LM2575IN |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
LM2575IN |
| LM2575INE4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
LM2575INE4 |
LM2575 应用技术支持与电子电路设计开发资源下载
- LM2575 数据资料 dataSheet 下载.PDF
- TI 德州仪器非隔离式开关 DC/DC 调节器选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- Understanding Boost Power Stages In Switchmode Power Supplies
(PDF 149 KB)
- Understanding Buck Power Stages In Switchmode Power Supplies
(PDF 173 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
LM2575 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| LM2575 的评估模块 |
LM2575EVM-162 |
Texas Instruments |
开发电路板/EVM |
