MAX1705

1至3节电池、大电流、低噪声、升压型DC-DC转换器,带有线性稳压器

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


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说明

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.

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

  • 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
Part NumberICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
Package/Pins
typtypmax
MAX1705 0.1120
QSOP/16
MAX1706 
QSOP/16
查看所有Step-Up Switching Regulators (98)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
IOUT1
(A)
IOUT1
(A)
Output Adjust. MethodSwitch TypeSynchronous SwitchingPower Good SignalICC
(mA)
DC-DC OutputsAlternate TopologyLDO/ Op.Amp. OutputsOper. Freq.
(kHz)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
minmaxminmaxmaxSee Notes
MAX1705 0.75.52.55.50.80.8ResistorInternalYesYes0.191
Step-Up
Step-Up/Down
1400
QSOP/16
-40 to +85$3.88 @1k
MAX1706 0.40.4
QSOP/16
$3.11 @1k
查看所有Step-Down/Up Switching Regulators (30)


MAX1705EVKIT: MAX1705、MAX1706评估板
MAX1706EVKIT: MAX1705、MAX1706评估板
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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Temperature:

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