数据手册MAX1705, MAX1706 低噪声、双输出转换器,为蜂窝电话中的PA、无线基带和逻辑电路供电 .pdf [英文Rev.1(PDF,268kB)]

{状况:生产中。}

The MAX1705/MAX1706 are high-efficiency, low-noise, step-up DC-DC converters with an auxiliary linear-regulator output. These devices are intended for use in battery-powered wireless applications. They use a synchronous rectifier pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from battery inputs, such as 1 to 3 NiCd/NiMH cells or 1 Li-Ion cell. The MAX1705 has an internal 1A n-channel MOSFET switch. The MAX1706 has a 0.5A switch. Both devices also have a built-in low-dropout linear regulator that delivers up to 200mA. With an internal synchronous rectifier, the MAX1705/MAX1706 deliver 5% better efficiency than similar non-synchronous converters. They also feature a pulse-frequency-modulation (PFM) standby mode to improve efficiency at light loads, and a 1µA shutdown mode. An efficiency-enhancing track mode reduces the step-up DC-DC converter output to 300mV above the linear-regulator output. Both devices come in a 16-pin QSOP package, which occupies the same space as an 8-pin SO. Other features include two shutdown-control inputs for push-on/push-off control, and an uncommitted comparator for use as a voltage monitor.

产品关键特性
  • Up to 96% Efficiency
  • 1.1VIN Guaranteed Startup
  • Up to 850mA Output (MAX1705)
  • Step-Up Output (2.5V to 5.5V Adjustable)
  • Linear Regulator (1.25V to 5.0V Adjustable)
  • PWM/PFM Synchronous-Rectified Topology
  • 300kHz PWM Mode or Synchronizable
  • 1µA Shutdown Mode
  • Voltage Monitor
  • Pushbutton On/Off Control
应用与使用范围
  • 数字无绳电话
  • 手持式仪表(PDA、掌上电脑)
  • 掌上电脑
  • PCS电话
  • 个人通信装置
  • 双向寻呼
  • 无线手机

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
功能接近器件
MAX17001节至3节电池、大功率(1A)、低噪声、升压型DC-DC转换器
MAX17011节至3节电池、大功率(1A)、低噪声、升压型DC-DC转换器
MAX17031节至3节电池、大功率(1.5A)、低噪声、升压型DC-DC转换器
评估板与开发套件
MAX1705EVKITMAX1705、MAX1706评估板
MAX1706EVKITMAX1705、MAX1706评估板
相关芯片型号
MAX1705EVKITMAX1705、MAX1706评估板
MAX1706EVKITMAX1705、MAX1706评估板
MAX1705-MAX1706.pdf MAX1706
Extend Battery Life with Dual Power Supply for Wallcube/Battery-Powered Systems MAX1705
Trading Performance for Cost in Portable Power Supplies MAX1705