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主要特征
应用/用途
Parametric specs for Charge Pumps
| Topology | Doubler Inverter Unregulated |
| VIN (V) (min) | 3 |
| VIN (V) (max) | 5.5 |
| IOUT (A) (typ) | 0.125 |
| Unadj. VOUT (V) | +2xVIN -VIN |
| ICC (mA) (max) | 17 |
| Switching Frequency (kHz) | 1000 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 2.58 |
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参量
Parametric specs for Charge Pumps
| Topology | Doubler Inverter Unregulated |
| VIN (V) (min) | 3 |
| VIN (V) (max) | 5.5 |
| IOUT (A) (typ) | 0.125 |
| Unadj. VOUT (V) | +2xVIN -VIN |
| ICC (mA) (max) | 17 |
| Switching Frequency (kHz) | 1000 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 2.58 |
主要特征
- Selectable Switching Frequencies:
- 125kHz/250kHz (MAX1680)
- 500kHz/1MHz (MAX1681)
- 125kHz/250kHz (MAX1680)
- Allow Use of Small Capacitors (1µF for the MAX1681)
- 125mA Output Current
- 3.5Ω Output Impedance
- 1µA Logic-Controlled Shutdown
- Configurable as Voltage Inverters or Doublers
- +2.0V to +5.5V Input Voltage Range
- Available in 8-Pin SO Packages
- 90% Efficiency
应用/用途
- 接口供电
- 本地负电源
- MOSFET偏置
- 运算放大器电源
描述
The MAX1680/MAX1681 inductorless switched-capacitor voltage converters either invert an input voltage of +2.0V to +5.5V or double it while supplying up to 125mA output current. They have a selectable-frequency option that allows the use of small capacitors: 4.7µF (MAX1680), 1µF (MAX1681). With their high output current capability, these charge-pump devices are suitable replacements for inductor-based regulators, which require more expensive external components and additional board space.
The devices' equivalent output resistance (typically 3.5Ω) allows them to deliver as much as 125mA with only a 440mV drop. A shutdown feature reduces quiescent current to less than 1µA. The MAX1680/MAX1681 are available in 8-pin SO packages. For devices that deliver up to 50mA in smaller µMAX® packages, refer to the MAX860/MAX861 data sheet.
The devices' equivalent output resistance (typically 3.5Ω) allows them to deliver as much as 125mA with only a 440mV drop. A shutdown feature reduces quiescent current to less than 1µA. The MAX1680/MAX1681 are available in 8-pin SO packages. For devices that deliver up to 50mA in smaller µMAX® packages, refer to the MAX860/MAX861 data sheet.
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