MAX1837：24V内置开关、100%占空比、降压型转换器 _ BDTIC 中国领先电子元器件代理商

MAX1837：24V内置开关、100%占空比、降压型转换器

The MAX1836/MAX1837 high-efficiency step-down converters provide a preset 3.3V or 5V output voltage from supply voltages as high as 24V. Using external feedback resistors, the output voltage can be adjusted from 1.25V to VIN. An internal current-limited switching MOSFET delivers load currents up to 125mA (MAX1836) or 250mA (MAX1837). The unique current-limited control scheme, operating with duty cycles up to 100%, minimizes the dropout voltage (120mV at 100mA). Additionally, this control scheme reduces supply current under light loads to 12µA. High switching frequencies allow the use of tiny surface-mount inductors and output capacitors. The MAX1836/MAX1837 step-down converters with internal switching MOSFETs are available in 6-pin SOT23 and 3mm x 3mm TDFN packages, making them ideal for low-cost, low-power, space-sensitive applications. For increased output drive capability, use the MAX1776 step-down converter that uses an internal 24V switch to deliver up to 500mA. For even higher currents, use the MAX1626/MAX1627 step-down controllers that drive an external P-channel MOSFET to deliver up to 20W.

关键特性

4.5V to 24V Input Voltage Range
Preset 3.3V or 5V Output
Adjustable Output from 1.25V to VIN
Output Currents Up to 125mA (MAX1836) or 250mA (MAX1837)
Efficiency Over 90%
12µA Quiescent Current
3µA Shutdown Current
100% Maximum Duty Cycle for Low Dropout
Small 6-Pin SOT23 and TDFN Packages

MAX1836、MAX1837：典型工作电路

应用

4mA至20mA环路供电
9V电池系统
备用电源
分布式供电系统
手持式设备
工业控制电源
笔记本电脑

数据手册DataSheet

语言	下载文件	备注
英文	MAX1836-MAX1837.pdf	Rev 3; 08/2006

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	DC-DC Outputs	Oper. Freq. (kHz)	Design Tools	Package/Pins	Budgetary Price
Part Number	min	max	min	max	Preset V_OUT (V)	Output Adjust. Method	max	Switch Type	DC-DC Outputs	Oper. Freq. (kHz)	Design Tools	Package/Pins	See Notes
MAX1836	4.5	24	1.25	24	3.3 5	Preset Resistor	0.125	Internal	1	200	EE-Sim	SOT/6 TDFN-EP/6	$2.07 @1k
MAX1837	4.5	24	1.25	24	3.3 5	Preset Resistor	0.25	Internal	1	200	EE-Sim	SOT/6 TDFN-EP/6	$2.07 @1k

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX1837ETT33+	生产中		TDFN-EP,；6引脚；9.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1837ETT33+T	生产中		TDFN-EP,；6引脚；9.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1837ETT50+	生产中		TDFN-EP,；6引脚；9.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1837ETT50+T	生产中		TDFN-EP,；6引脚；9.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1837EUT33	停止供货	MAX1837EUT33+	SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：否
MAX1837EUT33#G16	生产中		SOT,；6引脚；9mm²	-40°C至+85°C
MAX1837EUT33#TG16	生产中		SOT,；6引脚；9mm²	-40°C至+85°C
MAX1837EUT33+	生产中		SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1837EUT33+T	生产中		SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1837EUT33-T	停止供货	MAX1837EUT33+	SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：否
型号	状况	推荐替代产品	封装：类型引脚占位面积封装图编码/变更 *	温度	RoHS/无铅？
MAX1837EUT50#G16	生产中		SOT,；6引脚；9mm²	-40°C至+85°C
MAX1837EUT50#TG16	生产中		SOT,；6引脚；9mm²	-40°C至+85°C
MAX1837EUT50+	生产中		SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1837EUT50+T	生产中		SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX1837EUT50-T	停止供货	MAX1837EUT50+T	SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：否

MAX1836-MAX1837.pdf MAX1837

EE-SIM Design and Simulation Environment User Guide MAX17681

MAX1837.pdf MAX1837