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器件采用峰值电流模式控制架构,有一个MODE引脚,可 用于选择脉宽调制(PWM)或脉冲频率调制(PFM)工作模式。 PWM工作模式在任何负载条件下都保持固定工作频率, 非常适用于对开关频率变化敏感的应用。PFM工作模式消除了负向电感电流以及轻载时使用跳脉冲以提高效率。 PFM模式下,转换器的空载耗流仅为22μA。低导通电阻的内置MOSFET确保满载时高效率,同时也简化了PCB的设计。
器件具有可编程开关频率,以优化方案尺寸和效率。可编程软启动功能降低用户浪涌电流。一个EN/UVLO引脚允许用户在输入电压达到相应要求值时开启/关断器件。开漏RESET引脚可以监控输出电压。器件工作在-40°C至 +125°C工业级温度范围,有10引脚(3mm x 2mm) TDFN 和10引脚(3mm x 3mm) μMAX®两种很小的封装。提供仿真模型。
主要特征
- 减少外部元器件,降低总体成本
- 无需肖特基二极管——同步整流工作高效、低成本
- 内部补偿
- 内部固定的5.1ms或可编程软启动
- 可全用陶瓷电容,使紧凑布局
- 缩减DC-DC稳压器库存清单
- 4V至60V宽输入电压范围
- 0.8V至0.9 x VIN输出电压可调节
- 提供高达100mA负载电流
- 100kHz至2.2MHz可调节开关频率范围,带外同步
- 可配置PFM和强制PWM两种工作模式
- 降低功耗
- 22μA空载电流
- 峰值效率>90%
- PFM特性使轻载时效率高
- 1.2μA (典型值)关断电流
- 能在恶劣工业环境下可靠工作
- 峰值限流保护
- 有内置输出电压监测的开漏RESET输入引脚
- 可编程EN/UVLO门限
- 启动时单调进入预偏置输出
- 过热保护
- 高工业级-40°C至+125°C工作范围/ -40°C至+150°C结温范围
应用/用途
- 4–20mA电流环供电传感器
- 电池供电设备
- 通用负载点电源
- 替代高压LDO
- HVAC与楼宇控制
- 工业传感器和过程控制
| VIN (V) (min) | 4 |
| VIN (V) (max) | 60 |
| VOUT1 (V) (min) | 0.8 |
| VOUT1 (V) (max) | 54 |
| IOUT1 (A) (max) | 0.1 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| ICC (mA) (typ) | - |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TDFN/10 UMAX/10 |
| Budgetary Price (See Notes) | $1.16 @1k |
技术文档
单击下面的标题以查看详情页面
描述
The MAX17552 5V evaluation kit (EV kit) (µMAX®) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17552 60V, 100mA ultra-small, high-efficiency, synchronous step-down DC-DC converter in a 10-pin µMAX package. The EV kit operates over a wide input voltage range of 6V to 60V and provides up to 100mA load current at 5V output. It draws only 26µA supply current under no-load conditions (EN/UVLO connected to VIN). The EV kit is programmed to switch at a frequency of 220kHz and delivers a peak efficiency of 93% with the supplied components. The device is simple to use and easily configurable with minimal external components. It features cycle-by-cycle peak current-limit protection, undervoltage lockout and thermal shutdown.
The EV kit comes installed with the MAX17552AUB+ in an 10-pin (3mm x 3mm), lead(Pb)-free/RoHS-compliant µMAX package.
特征
- 6V to 60V Input Voltage Range
- 5V Output, 100mA Continuous Current
- 93% Peak Efficiency
- 26µA No-Load Supply Current
- EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout
- Programmable Switching Frequency
- Internal or Programmable Soft-Start
- PFM or Forced-PWM Mode of Operation
- Active-Low RESET Output
- Peak Current-Limit Protection
- Thermal Shutdown
- Proven PCB Layout
- Fully Assembled and Tested
描述
The MAX17552 5V evaluation kit (EV kit) (TDFN) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17552 60V, 100mA ultra-small, high-efficiency, synchronous step-down DC-DC converter in a 10-pin TDFN package. The EV kit operates over a wide input-voltage range of 6V to 60V and provides up to 100mA load current at 5V output. It draws only 26µA supply current under no-load conditions (EN/UVLO connected to VIN). The EV kit is programmed to switch at a frequency of 220kHz and delivers a peak efficiency of 93% with the supplied components. The device is simple to use and easily configurable with minimal external components. It features cycle-by-cycle peak current limit protection, undervoltage lockout, and thermal shutdown.
The EV kit comes installed with the MAX17552ATB+ in an 10-pin (3mm x 2mm) lead(Pb)-free/RoHS-compliant TDFN package.
特征
- 6V to 60V Input Voltage Range
- 5V Output, 100mA Continuous Current
- 93% Peak Efficiency
- 26µA No Load Supply Current
- EN/UVLO for On/Off Control and Programmable Input Undervoltage Lockout
- Programmable Switching Frequency
- Internal or Programmable Soft-Start
- PFM or Forced-PWM Mode of Operation
- Open-Drain Active-Low RESET Output
- Peak Current Limit Protection
- Thermal Shutdown
- Proven PCB Layout
- Fully Assembled and Tested
 | 工具和模型 EE-Sim: 设计和仿真MAX17552 | 创建设计 |
参量
| VIN (V) (min) | 4 |
| VIN (V) (max) | 60 |
| VOUT1 (V) (min) | 0.8 |
| VOUT1 (V) (max) | 54 |
| IOUT1 (A) (max) | 0.1 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| ICC (mA) (typ) | - |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TDFN/10 UMAX/10 |
| Budgetary Price (See Notes) | $1.16 @1k |
主要特征
- 减少外部元器件,降低总体成本
- 无需肖特基二极管——同步整流工作高效、低成本
- 内部补偿
- 内部固定的5.1ms或可编程软启动
- 可全用陶瓷电容,使紧凑布局
- 缩减DC-DC稳压器库存清单
- 4V至60V宽输入电压范围
- 0.8V至0.9 x VIN输出电压可调节
- 提供高达100mA负载电流
- 100kHz至2.2MHz可调节开关频率范围,带外同步
- 可配置PFM和强制PWM两种工作模式
- 降低功耗
- 22μA空载电流
- 峰值效率>90%
- PFM特性使轻载时效率高
- 1.2μA (典型值)关断电流
- 能在恶劣工业环境下可靠工作
- 峰值限流保护
- 有内置输出电压监测的开漏RESET输入引脚
- 可编程EN/UVLO门限
- 启动时单调进入预偏置输出
- 过热保护
- 高工业级-40°C至+125°C工作范围/ -40°C至+150°C结温范围
应用/用途
- 4–20mA电流环供电传感器
- 电池供电设备
- 通用负载点电源
- 替代高压LDO
- HVAC与楼宇控制
- 工业传感器和过程控制
描述
器件采用峰值电流模式控制架构,有一个MODE引脚,可 用于选择脉宽调制(PWM)或脉冲频率调制(PFM)工作模式。 PWM工作模式在任何负载条件下都保持固定工作频率, 非常适用于对开关频率变化敏感的应用。PFM工作模式消除了负向电感电流以及轻载时使用跳脉冲以提高效率。 PFM模式下,转换器的空载耗流仅为22μA。低导通电阻的内置MOSFET确保满载时高效率,同时也简化了PCB的设计。
器件具有可编程开关频率,以优化方案尺寸和效率。可编程软启动功能降低用户浪涌电流。一个EN/UVLO引脚允许用户在输入电压达到相应要求值时开启/关断器件。开漏RESET引脚可以监控输出电压。器件工作在-40°C至 +125°C工业级温度范围,有10引脚(3mm x 2mm) TDFN 和10引脚(3mm x 3mm) μMAX®两种很小的封装。提供仿真模型。
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