MAX1674:高效率、低电源电流、紧凑的、升压型DC-DC转换器

紧凑的低成本、低噪声设计:电感阻尼开关可有效降低纹波,改善EMI抑制

The MAX1674/MAX1675/MAX1676 compact, high-efficiency, step-up DC-DC converters fit in small µMAX packages. They feature a built-in synchronous rectifier, which improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. Quiescent supply current is only 16µA. The input voltage ranges from 0.7V to VOUT, where VOUT can be set from 2V to 5.5V. Start-up is guaranteed from 1.1V inputs. The MAX1674/MAX1675/MAX1676 have a preset, pin-selectable output for 5V or 3.3V. The outputs can also be adjusted to other voltages using two external resistors. All three devices have a 0.3Ω N-channel MOSFET power switch. The MAX1674 has a 1A current limit. The MAX1675 has a 0.5A current limit, which permits the use of a smaller inductor. The MAX1676 comes in a 10-pin µMAX package and features an adjustable current limit and circuitry to reduce inductor ringing.

关键特性
  • 94% Efficient at 200mA Output Current
  • 16µA Quiescent Supply Current
  • Internal Synchronous Rectifier (no external diode)
  • 0.1µA Logic-Controlled Shutdown
  • LBI/LBO Low-Battery Detector
  • Selectable Current Limit for Reduced Ripple
  • Low-Noise, Anti-Ringing Feature (MAX1676)
  • 8-Pin and 10-Pin µMAX Packages
  • Preassembled Evaluation Kit (MAX1676EVKIT)
MAX1674、MAX1675、MAX1676:典型工作电路
MAX1674、MAX1675、MAX1676:典型工作电路
应用
  • 1节至3节电池供电的手持设备
  • 手持式计算机
  • 医疗设备
  • 寻呼机
  • PDA
  • 射频标记
  • 无线电话
数据手册DataSheet
语言下载文件备注
英文MAX1674-MAX1676.pdfRev 3; 03/2000
关键参数
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypePower Good SignalSynchronous SwitchingICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsPackage/PinsBudgetary
Price
minmaxminmaxmaxtyptypmaxSee Notes
MAX16740.75.525.5
  • 3.3
  • 5
0.3
  • Preset
  • Resistor
InternalYesYes0.0160.111µMAX/8$1.85 @1k
MAX1675µMAX/8$2.17 @1k
MAX1676µMAX/10$1.99 @1k
开发工具
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1674EUA停止供货MAX1674EUA+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX1674EUA+生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1674EUA+T生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1674EUA-T停止供货MAX1674EUA+TµMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX1674-MAX1676.pdf MAX1676
Protecting Against Momentary Power Loss Due to Battery-Bounce MAX4501
Protection From Blackouts: Dirt Cheap to Fully Integrated MAX8211
MAX1674.pdf MAX1674
典型工作电路 MAX1676