MAX17552 : 60V, 100mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22μA No-Load Supply Current

数据手册：MAX17552 60V, Low IQ Synchronous Buck Regulator Enables High Efficiency .pdf [英文Rev.0(PDF,1.3MB)]

{状况：生产中。}

The MAX17552 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4V to 60V input voltage range. The converter can deliver output current up to 100mA at output voltages of 0.8V to 0.9 x VIN. The output voltage is accurate to within ±1.75% over the -40°C to +125°C temperature range. The device employs a peak-current-mode control architecture with a MODE pin that can be used to operate the device in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads and is useful in applications sensitive to variable switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. The converter consumes only 22µA of no-load supply current in PFM mode. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify PCB layout. The device offers programmable switching frequency to optimize solution size and efficiency. Programmable soft-start allows the user to reduce the inrush currents. An EN/UVLO pin allows the user to turn on/off the device at the desired input-voltage level. An open-drain active-low RESET pin allows output-voltage monitoring. The device operates over the -40°C to +125°C industrial temperature range and is available in a compact 10-pin (3mm x 2mm) TDFN and 10-pin (3mm x 3mm) µMAX® packages. Simulation models are available.

产品关键特性

Eliminates External Components and Reduces Total Cost
- No Schottky—Synchronous Operation for High Efficiency and Reduced Cost
- Internal Compensation
- Fixed Internal 5.1ms or Programmable Soft-Start
- All-Ceramic Capacitors, Ultra-Compact Layout
Reduces Number of DC-DC Regulators to Stock
- Wide 4V to 60V Input Voltage Range
- Adjustable 0.8V to 0.9 x V_IN Output Voltages
- Delivers Up to 100mA Load Current
- 100kHz to 2.2MHz Adjustable Switching Frequency Range with External Synchronization
- Configurable Between PFM and Forced-PWM Modes
Reduces Power Dissipation
- 22µA No Load Supply Current
- Peak Efficiency > 90%
- PFM Feature for High Light-Load Efficiency
- 1.2µA (typ) Shutdown Current
Operates Reliably in Adverse Industrial Environments
- Peak Current-Limit Protection
- Built-In Output-Voltage Monitoring with Open-Drain Active-Low RESET Pin
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Output
- Overtemperature Protection
- -40°C to +125°C Industrial/Automotive Temperature Range

应用与使用范围

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

Typical Application Circuit

MAX17552 Typical Application Circuit

芯片订购型号

订购型号	产品状态	封装形式	工作温度	RoHS/无铅
MAX17552ATB+T	生产中	TDFN；10引脚；6mm²封装信息	-40°C至+85°C	RoHS/无铅：无铅材料分析
MAX17552AUB+	生产中	µMAX；10引脚；15.4mm²封装信息	-40°C至+85°C	RoHS/无铅：无铅材料分析
MAX17552AUB+T	生产中	µMAX；10引脚；15.4mm²封装信息	-40°C至+85°C	RoHS/无铅：无铅材料分析