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主要特征
应用/用途
Parametric specs for Charge Pumps
| Topology | Inverter Unregulated |
| VIN (V) (min) | 1.5 |
| VIN (V) (max) | 5.5 |
| IOUT (A) (typ) | 0.025 |
| Unadj. VOUT (V) | -VIN |
| ICC (mA) (max) | 0.65 |
| Switching Frequency (kHz) | 125 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOT23/6 |
| Budgetary Price (See Notes) | 0.8 |
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简化框图
技术文档
| 数据资料 | SOT23封装、开关电容电压反相器，带有关断 | Jun 02, 2004 | |
| 设计指南 | DC-DC Conversion Without Inductors |
参量
Parametric specs for Charge Pumps
| Topology | Inverter Unregulated |
| VIN (V) (min) | 1.5 |
| VIN (V) (max) | 5.5 |
| IOUT (A) (typ) | 0.025 |
| Unadj. VOUT (V) | -VIN |
| ICC (mA) (max) | 0.65 |
| Switching Frequency (kHz) | 125 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOT23/6 |
| Budgetary Price (See Notes) | 0.8 |
主要特征
- 1nA Logic-Controlled Shutdown
- 6-Pin SOT23 Package
- 99.9% Voltage Conversion Efficiency
- 50µA Quiescent Current (MAX1720)
- +1.5V to +5.5V Input Voltage Range
- 25mA Output Current
- Requires Only Two 1µF Capacitors (MAX1719/MAX1721)
应用/用途
- 电池供电应用
- GaAs PA偏置电源
- 手持终端、PDA
- 从正电源产生本地负电源
- 小型LCD板
描述
The ultra-small MAX1719/MAX1720/MAX1721 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.5V to +5.5V. The MAX1720 operates at 12kHz, and the MAX1719/MAX1721 operate at 125kHz. High efficiency, small external components, and logic-controlled shutdown make these devices ideal for both battery-powered and board-level voltage conversion applications.
Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX1719/MAX1720/MAX1721 application is generating a -5V supply from a +5V logic supply to power analog circuitry. All three parts come in a 6-pin SOT23 package and can deliver a continuous 25mA output current.
For pin-compatible SOT23 switched-capacitor voltage inverters without shutdown (5-pin SOT23), see the MAX828/MAX829 and MAX870/MAX871 data sheets. For applications requiring more power, the MAX860/MAX861 deliver up to 50mA. For regulated outputs (up to -2 x VIN), refer to the MAX868. The MAX860/MAX861 and MAX868 are available in space-saving µMAX® packages.
Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX1719/MAX1720/MAX1721 application is generating a -5V supply from a +5V logic supply to power analog circuitry. All three parts come in a 6-pin SOT23 package and can deliver a continuous 25mA output current.
For pin-compatible SOT23 switched-capacitor voltage inverters without shutdown (5-pin SOT23), see the MAX828/MAX829 and MAX870/MAX871 data sheets. For applications requiring more power, the MAX860/MAX861 deliver up to 50mA. For regulated outputs (up to -2 x VIN), refer to the MAX868. The MAX860/MAX861 and MAX868 are available in space-saving µMAX® packages.
技术文档
| 数据资料 | SOT23封装、开关电容电压反相器，带有关断 | Jun 02, 2004 | |
| 设计指南 | DC-DC Conversion Without Inductors |
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