MAX1672：升/降压型DC-DC转换器，QSOP封装 _ BDTIC 中国领先电子元器件代理商

MAX1672：升/降压型DC-DC转换器，QSOP封装

紧凑的低噪声、无变压器升/降压调节器，仅使用一只电感，具有低输出纹波

The MAX1672 integrates a step-up DC-DC converter with a linear regulator to provide step-up/down voltage conversion. This device provides a constant output voltage for inputs that vary above and below the output voltage. It has a 1.8V to 11V input range and a preset 3.3V or 5V output. The output can also be set from 1.25V to 5.5V using two resistors. Typical efficiency is 85%. The MAX1672's step-up/linear-regulator configuration permits the use of a single, physically smaller inductor than can be used with competing SEPIC and flyback configurations. Switch current is also selectable, permitting the use of smaller inductors in low-current applications. The linear regulator also acts as a filter to reduce output ripple voltage. The MAX1672 has a low 85µA quiescent supply current, which is further reduced to 0.1µA in logic-controlled shutdown. The output voltage is disconnected from the input in shutdown. The MAX1672 also has a PGI/PGO-bar low-battery detector. The MAX1672 comes in a 16-pin QSOP package (same size as a standard 8-pin SO). For a larger device that delivers more output current, refer to the MAX710/MAX711. The preassembled MAX1672 evaluation kit is available to speed designs.

关键特性

Step-Up/Down Voltage Conversion
1.8V to 11V Input Range
3.3V/5V or Adjustable Output Voltage Range
Output Current:
- 300mA at 5V (VIN > 2.5V)
- 150mA at 5V (VIN > 1.8V)
Smaller Inductor than SEPIC and Flybacks
Load Disconnects from Input in Shutdown
Supply Current from Battery:
- 85µA (No-Load)
- 0.1µA (Shutdown)
PGI/PGO-bar Low-Battery Comparator
16-Pin QSOP Package (Same Footprint as 8-pin SO)
No External FETs Required
Thermal and Short-Circuit Protection

MAX1672：典型工作电路

应用

2节至4节AA碱性电池供电的手持设备
3.3V及其它低电压系统
电池供电设备
数码相机
带有交流适配器输入的单节锂电池供电便携设备

数据手册DataSheet

语言	下载文件	备注
英文	MAX1672.pdf	Rev 2; 12/2002

关键参数

Part Number	V_IN (V)	V_IN (V)	V_OUT1 (V)	V_OUT1 (V)	Preset V_OUT (V)	Output Adjust. Method	I_OUT1 (A)	Switch Type	Power Good Signal	DC-DC Outputs	Package/Pins	Budgetary Price
Part Number	min	max	min	max	Preset V_OUT (V)	Output Adjust. Method	max	Switch Type	Power Good Signal	DC-DC Outputs	Package/Pins	See Notes
MAX1672	1.8	11	1.25	5.5	3.3 5	Preset Resistor	0.26	Internal	Yes	1	QSOP/16	$2.94 @1k

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX1672C/D	停止供货		DICE SALES,；NA引脚；DICE；	0°C至+70°C	参考数据资料
MAX1672EEE	停止供货	MAX1672EEE+	QSOP,；16引脚；30.9mm²	-40°C至+85°C	RoHS/无铅：否
MAX1672EEE+	生产中		QSOP,；16引脚；30.9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1672EEE+T	生产中		QSOP,；16引脚；30.9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1672EEE-T	停止供货	MAX1672EEE+T	QSOP,；16引脚；30.9mm²	-40°C至+85°C	RoHS/无铅：否
MAX1672MEE/PR2	停止供货		QSOP,；16引脚；30.9mm²	-55°C至+125°C	RoHS/无铅：否
MAX1672MEE/PR2-T	停止供货		QSOP；	-55°C至+125°C	参考数据资料