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主要特征
应用/用途
Parametric specs for Inverting Switching Regulators
| VIN (V) (min) | 3 |
| VIN (V) (max) | 16.5 |
| VOUT1 (V) (min) | -1 |
| VOUT1 (V) (max) | -16 |
| IOUT1 (A) (max) | 0.1 |
| Switch Type | Internal |
| Preset VOUT (V) | -15 |
| Output Adjust. Method | Resistor |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 300 |
| Package/Pins | PDIP/8 SOIC (N)/8 |
| Budgetary Price (See Notes) | 2.86 |
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参量
Parametric specs for Inverting Switching Regulators
| VIN (V) (min) | 3 |
| VIN (V) (max) | 16.5 |
| VOUT1 (V) (min) | -1 |
| VOUT1 (V) (max) | -16 |
| IOUT1 (A) (max) | 0.1 |
| Switch Type | Internal |
| Preset VOUT (V) | -15 |
| Output Adjust. Method | Resistor |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 300 |
| Package/Pins | PDIP/8 SOIC (N)/8 |
| Budgetary Price (See Notes) | 2.86 |
主要特征
- High Efficiency for a Wide Range of Load Currents
- 250mA Output Current
- 120µA Max Supply Current
- 5µA Max Shutdown Current
- 3V to 16V Input Voltage Range
- -5V (MAX764), -12V (MAX765), -15V (MAX766), or Adjustable Output from -1V to -16V
- Current-Limited PFM Control Scheme
- 300kHz Switching Frequency
- Internal, P-Channel Power MOSFET
应用/用途
- 电池供电应用
- LAN适配器
- LCD偏置发生器
- 便携式仪表
- 远端数据采集系统
描述
The MAX764/MAX765/MAX766 inverting switching regulators are highly efficient over a wide range of load currents, delivering up to 1.5W. A unique, current-limited, pulse-frequency-modulated (PFM) control scheme combines the benefits of traditional PFM converters with the benefits of pulse-width-modulated (PWM) converters. Like PWM converters, the MAX764/MAX765/MAX766 are highly efficient at heavy loads. Yet because they are PFM devices, they use less than 120µA of supply current (vs. 2mA to 10mA for a PWM device).
The input voltage range is 3V to 16V. The output voltage is preset at -5V (MAX764), -12V (MAX765), or -15V (MAX766); it can also be adjusted from -1V to -16V using two external resistors (Dual Mode™). The maximum operating VIN - VOUT differential is 20V.
These devices use miniature external components; their high switching frequencies (up to 300kHz) allow for less than 5mm diameter surface-mount magnetics. A standard 47µH inductor is ideal for most applications, so no magnetics design is necessary.
An internal power MOSFET makes the MAX764/MAX765/ MAX766 ideal for minimum component count, low- and medium-power applications. For increased output drive capability or higher output voltages, use the MAX774/MAX775/MAX776 or MAX1774, which drive an external power P-channel MOSFET for loads up to 5W.
The input voltage range is 3V to 16V. The output voltage is preset at -5V (MAX764), -12V (MAX765), or -15V (MAX766); it can also be adjusted from -1V to -16V using two external resistors (Dual Mode™). The maximum operating VIN - VOUT differential is 20V.
These devices use miniature external components; their high switching frequencies (up to 300kHz) allow for less than 5mm diameter surface-mount magnetics. A standard 47µH inductor is ideal for most applications, so no magnetics design is necessary.
An internal power MOSFET makes the MAX764/MAX765/ MAX766 ideal for minimum component count, low- and medium-power applications. For increased output drive capability or higher output voltages, use the MAX774/MAX775/MAX776 or MAX1774, which drive an external power P-channel MOSFET for loads up to 5W.
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