MAX775 Datasheet | Maxim Integrated

Description The MAX774/MAX775/MAX776 inverting switching regulators deliver high efficiency over three decades of load current. A unique current-limited, pulsefrequency modulated (PFM) control scheme provides the benefits of pulse-width modulation (high efficiency with heavy loads), while using less than 100µA of supply current (vs. 2m A to 10m A for PWM converters). The result is high efficiency over a wide range of loads. These ICs also use tiny external ponents; their high switching frequency (up to 300k Hz) allows for less than 5mm diameter surface-mount magnetics. The MAX774/MAX775/MAX776 accept input voltages from 3V to 16.5V, and have preset output voltages of -5V, -12V, and -15V, respectively. Or, the output voltage can be user-adjusted with two resistors. Maximum VIN - VOUT differential voltage is limited only by the breakdown voltage of the chosen external switch transistor. These inverters use external P-channel MOSFET switches, allowing them to power loads up to 5W. If less power is required, use the MAX764/MAX765/MAX766 inverting switching regulators with on-board MOSFETs. Applications LCD-Bias Generators High-Efficiency DC-to-DC Converters Battery-Powered Applications Data municators Features o 85% Efficiency for 5m A to 1A Load Currents o Up to 5W Output Power o 100µA (max) Supply Current o 5µA (max) Shutdown Current o 3V to 16.5V Input Range o -5V (MAX774), -12V (MAX775), -15V (MAX776), or Adjustable Output Voltage o Current-Limited PFM Control Scheme o 300k Hz Switching Frequency Ordering Information PART MAX774CPA MAX774CSA MAX774C/D MAX774EPA MAX774ESA MAX774MJA TEMP RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C - Contact factory for dice specifications. PIN-PACKAGE 8 Plastic DIP 8 SO Dice- 8 Plastic DIP 8 SO 8 CERDIP Ordering Information continued on last page. Typical Operating Circuit INPUT 3V TO 16V V+ ON/OFF MAX774 SHDN CS EXT REF OUT OUTPUT -5V TOP VIEW Pin...