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MAX17543
4.5V-42V, 2.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
Wide Input Voltage, 2.5A Internal FET Synchronous Buck Converter Ideal for Industrial Applications
Maxim Confidential 
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The MAX17543 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 42V input. The converter can deliver up to 2.5A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.1% over -40°C to +125°C.
The MAX17543 uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.
The device is available in a 20-pin (4mm × 4mm) TQFN package. Simulation models are available.
The MAX17543 uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.
The device is available in a 20-pin (4mm × 4mm) TQFN package. Simulation models are available.
主要特征
- Reduces External Components and Total Cost
- No Schottky—Synchronous Operation
- Internal Compensation for Any Output Voltage
- Built-In Soft-Start
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 42V Input
- Adjustable 0.9V to 0.9 x VIN Output
- 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- Peak Efficiency >90%
- PFM/DCM Enables Enhanced Light-Load Efficiency
- 2.8µA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Peak Current-Limit Protection
- Built-In Output Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Load
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
应用/用途
- 基站电源
- 配电稳压器
- 通用负载点电源
- 高压单板系统
- 工业电源
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 42 |
| VOUT1 (V) (min) | 0.9 |
| VOUT1 (V) (max) | 36 |
| IOUT1 (A) (max) | 2.5 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN-CU/20 |
| Budgetary Price (See Notes) | $1.67 @1k |
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描述
The MAX17543 3.3V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17543 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 3.3V output at load currents up to 2.5A and features a 450kHz switching frequency for optimum efficiency and component size. The EV kit features adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external frequency synchronization.
查看详情特征
- Operates from a 5V to 42V Input Supply
- 3.3V Output Voltage
- Up to 2.5A Output Current
- 450kHz Switching Frequency
- Enable/UVLO Input, Resistor-Programmable UVLO Threshold
- Adjustable Soft-Start Time
- MODE Pin to Select Among PWM, PFM, or DCM Modes
- Open-Drain RESET Output
- External Frequency Synchronization
- Overcurrent and Overtemperature Protection
- Proven PCB Layout
- Fully Assembled and Tested
描述
MAX17543 5V输出评估板(EV kit)提供经过验证的设计，用于评估MAX17543高压、高效、同步降压型DC-DC转换器。评估板预设为5V输出，负载电流高达2.5A，开关频率为500kHz，可获得最佳的效率和元件尺寸。评估板具有可调节输入欠压锁定、可调节软启动、低电平有效RESET开漏信号，以及外频率同步。
查看详情特征
- 6.5V至42V输入电源工作范围
- 5V输出电压
- 高达2.5A输出电流
- 500kHz开关频率
- 使能/UVLO输入，电阻设置UVLO门限
- 可调节软启动时间
- MODE引脚选择PWM、PFM或DCM模式
- 开漏、低电平有效RESET输出
- 外部频率同步
- 过流和过热保护
- 经过验证的PCB布局
- 全部装配并经过测试
/cn/design/design-tools/ee-sim.html?
 | 工具和模型 EE-Sim: 设计和仿真MAX17543 | 创建设计 |
参量
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 42 |
| VOUT1 (V) (min) | 0.9 |
| VOUT1 (V) (max) | 36 |
| IOUT1 (A) (max) | 2.5 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 2200 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN-CU/20 |
| Budgetary Price (See Notes) | $1.67 @1k |
主要特征
- Reduces External Components and Total Cost
- No Schottky—Synchronous Operation
- Internal Compensation for Any Output Voltage
- Built-In Soft-Start
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 42V Input
- Adjustable 0.9V to 0.9 x VIN Output
- 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- Peak Efficiency >90%
- PFM/DCM Enables Enhanced Light-Load Efficiency
- 2.8µA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Peak Current-Limit Protection
- Built-In Output Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Load
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
应用/用途
- 基站电源
- 配电稳压器
- 通用负载点电源
- 高压单板系统
- 工业电源
描述
The MAX17543 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 42V input. The converter can deliver up to 2.5A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.1% over -40°C to +125°C.
The MAX17543 uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.
The device is available in a 20-pin (4mm × 4mm) TQFN package. Simulation models are available.
The MAX17543 uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous conduction mode (DCM) control schemes.
The device is available in a 20-pin (4mm × 4mm) TQFN package. Simulation models are available.
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