MAX17551：60V, 50mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22μA No-Load Supply Current

60V, Low IQ Synchronous Buck Regulator Enables High Efficiency

The MAX17551 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4V to 60V input. The converter can deliver up to 50mA and generates output voltages from 0.8V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.75% over -40°C to +125°C. The MAX17551 uses peak-current-mode control and can be operated in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) modes. The device is available in a 10-pin (3mm x 2mm) TDFN and 10-pin (5mm x 3mm) µMAX® packages. Simulation models are available.

关键特性

Reduces External Components and Total Cost
- No Schottky–Synchronous
- Internal Compensation for Any Output Voltage
- Built-In Soft-Start
- All-ceramic capacitors, Compact Layout
Reduces Number of DC-DC Regulators to Stock
- Wide 4V to 60V Input
- Adjustable 0.8V to 0.9 x VIN Output
- 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
Reduces Power Dissipation
- 22µA Quiescent Current
- Peak Efficiency > 90%
- PFM Enables Enhanced Light-Load Efficiency
- 1.2µA Shutdown Current
Operates Reliable in Adverse Environments
- Peak Current Limit Protection
- Built-In Output Voltage Monitoring Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup in to Prebiased Load
- Overtemperature Protection
- -40°C to +125°C Operation

MAX17551: Typical Application Circuit

应用

电池供电设备
替代高压LDO
HVAC与楼宇控制
工业传感器和过程控制

数据手册DataSheet

语言	下载文件	备注
英文	MAX17551.pdf	Rev 1; 05/2015

关键参数

Part Number	V_IN (V)	V_IN (V)	V_OUT1 (V)	V_OUT1 (V)	Output Adjust. Method	I_OUT1 (A)	Switch Type	Synchronous Switching	Power Good Signal	DC-DC Outputs	Oper. Freq. (kHz)	Design Tools	Package/Pins	Budgetary Price
Part Number	min	max	min	max	Output Adjust. Method	max	Switch Type	Synchronous Switching	Power Good Signal	DC-DC Outputs	Oper. Freq. (kHz)	Design Tools	Package/Pins	See Notes
MAX17551	4.5	60	0.8	54	Resistor	0.05	Internal	Yes	Yes	1	2200	EE-Sim	µMAX/10 TDFN/10	$1.07 @1k

开发工具

技术资料

Realizing Industry 4.0: Essential System Considerations

订购型号

型号	状况	封装	温度	RoHS/无铅
MAX17551ATB+	生产中	TDFN,；10引脚；6mm²	-40°C至+125°C	RoHS/无铅：无铅
MAX17551ATB+T	生产中	TDFN,；10引脚；6mm²	-40°C至+125°C	RoHS/无铅：无铅
MAX17551AUB+	生产中	µMAX,；10引脚；15.4mm²	-40°C至+125°C	RoHS/无铅：无铅
MAX17551AUB+T	生产中	µMAX,；10引脚；15.4mm²	-40°C至+125°C	RoHS/无铅：无铅

MAX17551.pdf MAX17551

Realizing Industry 4.0: Essential System Considerations DS28E25