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主要特征
应用/用途
Parametric specs for Charge Pumps
| Topology | Inverter Unregulated |
| VIN (V) (min) | 1.4 |
| VIN (V) (max) | 5.5 |
| IOUT (A) (typ) | 0.025 |
| Unadj. VOUT (V) | -VIN |
| ICC (mA) (max) | 1 |
| Switching Frequency (kHz) | 125 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOT23/5 |
| Budgetary Price (See Notes) | 2.27 |
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技术文档
| 数据资料 | 开关电容电压反相器 | May 31, 2004 | |
| 设计指南 | DC-DC Conversion Without Inductors |
参量
Parametric specs for Charge Pumps
| Topology | Inverter Unregulated |
| VIN (V) (min) | 1.4 |
| VIN (V) (max) | 5.5 |
| IOUT (A) (typ) | 0.025 |
| Unadj. VOUT (V) | -VIN |
| ICC (mA) (max) | 1 |
| Switching Frequency (kHz) | 125 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOT23/5 |
| Budgetary Price (See Notes) | 2.27 |
主要特征
- 5-Pin SOT23-5 Package
- 99% Voltage Conversion Efficiency
- Invert Input Supply Voltage
- 0.7mA Quiescent Current (MAX870)
- +1.4V to +5.5V Input Voltage
- Require Only Two Capacitors
- 25mA Output Current
- Shutdown Control
应用/用途
- 电池供电设备
- 蜂窝电话
- 手持终端、PDA
- 从5V逻辑电源产生本地-5V电源
- 医疗仪器
- 小型LCD板
描述
The ultra-small MAX870/MAX871 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.4V to +5.5V. The MAX870 operates at 125kHz, and the MAX871 operates at 500kHz. Their high efficiency (90%) and low operating current (0.7mA for the MAX870) 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 MAX870/ MAX871 application is generating a -5V supply from a +5V logic supply to power analog circuitry. Both parts come in a 5-pin SOT23-5 package and can deliver 25mA with a voltage drop of 500mV.
For a similar device with logic-controlled shutdown, refer to the MAX1720/MAX1721. For applications requiring more power, the MAX860 delivers up to 50mA with a voltage drop of 600mV, in a space-saving µMAX package.
Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX870/ MAX871 application is generating a -5V supply from a +5V logic supply to power analog circuitry. Both parts come in a 5-pin SOT23-5 package and can deliver 25mA with a voltage drop of 500mV.
For a similar device with logic-controlled shutdown, refer to the MAX1720/MAX1721. For applications requiring more power, the MAX860 delivers up to 50mA with a voltage drop of 600mV, in a space-saving µMAX package.
技术文档
| 数据资料 | 开关电容电压反相器 | May 31, 2004 | |
| 设计指南 | DC-DC Conversion Without Inductors |
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