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MAX651 Datasheet Step-down DC-dc Controllers

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-0225; Rev 3; 9/97 K ATION EVALU BLE AVAILA IT 5V/3.3V/3V or Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC.

General Description

The MAX649/MAX651/MAX652 BiCMOS, step-down DCDC switching controllers provide high efficiency over three decades of load current.

A unique, current-limited pulse-frequency-modulated (PFM) control scheme gives these devices the benefits of pulse-width-modulation (PWM) converters (high efficiency at heavy loads), while using only 100µA of supply current (vs.

2mA to 10mA for PWM converters).

Key Features

  • o o o o o o o More than 90% Efficiency (10mA to 1.5A Loads) More than 12.5W Output Power 100µA Max Quiescent Supply Current 5µA Max Shutdown Supply Current Less than 1.0V Dropout Voltage 16.5V Max Input Voltage 5V (MAX649), 3.3V (MAX651), 3V (MAX652), or Adjustable Output Voltage o Current-Limited Control Scheme o Up to 300kHz Switching Frequency MAX649/MAX651/MAX652 ______________Ordering Information PART MAX649CPA MAX649CSA MAX649C/D MAX649EPA MAX649ESA MAX649MJA TEMP. RANGE 0°C to +70°C 0°C.

MAX651 Distributor

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More Datasheets from Maxim Integrated (now Analog Devices)

Part Number Description
MAX6510 Low-Cost / Remote SOT Temperature Switches
MAX6511 Low-Cost / Remote SOT Temperature Switches
MAX6516 Analog Temperature Sensor Switches
MAX6501 Low-Cost / +2.7V to +5.5V / Micropower Temperature Switches
MAX6502 Low-Cost / +2.7V to +5.5V / Micropower Temperature Switches
MAX6503 Low-Cost / +2.7V to +5.5V / Micropower Temperature Switches
MAX6504 Low-Cost / +2.7V to +5.5V / Micropower Temperature Switches
MAX6505 Dual Trip SOT Temperature Switches
MAX6509 Resistor-Programmable SOT Temperature Switches
MAX652 5V/3.3V/3V or Adjustable / High-Efficiency /