MICROCHIP MCP16331T-E/CH

The MCP16331 is a highly integrated, high-efficiency, fixed frequency, step-down DC-DC converter in a popular 6-pin SOT-23 or 8-pin 2×3 TDFN package that operates from input voltage sources up to 50V. Integrated features include a high-side switch, fixed frequency Peak CurrentMode control, internal compensation, peak current limit and overtemperature protection. Minimal external components are necessary to develop a complete step-down DC-DC converter power supply. High converter efficiency is achieved by integrating the current-limited, low-resistance, high-speed N-Channel MOSFET and associated drive circuitry. High switching frequency minimizes the size of external filtering components, resulting in a small solution size. The MCP16331 can supply 500 mA of continuous current while regulating the output voltage from 2.0V to 24V. An integrated, high-performance Peak CurrentMode architecture keeps the output voltage tightly regulated, even during input voltage steps and output current transient conditions that are common in power systems. The EN input is used to turn the device on and off. While off, only a few μA of current are consumed from the input for power shedding and load distribution applications. This pin is internally pulled up, so the device will start, even if the EN pin is left floating. Output voltage is set with an external resistor divider. The MCP16331 is offered in a space-saving 6-lead SOT-23 and 8-lead 2×3 TDFN surface mount package.

• Up to 96% Efficiency
• Input Voltage Range: 4.4V to 50V
• Output Voltage Range: 2.0V to 24V
• 2% Output Voltage Accuracy
• Qualification: AEC-Q100 Rev. G, Grade 1 ( -40°C to 125°C )
• Integrated N-Channel Buck Switch: 600 mΩ
• Minimum 500 mA Output Current Over All Input Voltage Ranges
• Up to 1.2A output current at 3.3V and 5V VOUT, VIN>12V, SOT-23 package at +25°C ambient temperature
• Up to 0.8A output current at 12V VOUT, VIN>18V, SOT-23 package at +25°C ambient temperature
• 500 kHz Fixed Frequency
• Adjustable Output Voltage
• Low Device Shutdown Current
• Peak Current Mode Control
• Internal Compensation
• Stable with Ceramic Capacitors
• Internal Soft Start
• Internal Pull-up on EN
• Cycle-by-Cycle Peak Current Limit
• Undervoltage Lockout (UVLO): 4.1V to Start; 3.6V to Stop
• Overtemperature Protection
• Available Package: 6-Lead SOT-23, 8-Lead 2x3 TDFN

• PIC MCU/dsPIC DSC Microcontroller Bias Supply
• 48V, 24V and 12V Industrial Input DC-DC Conversion
• Set-Top Boxes (STB)
• DSL Cable Modems
• Automotive
• AC/DC Adapters
• SLA Battery-Powered Devices
• AC-DC Digital Control Power Source
• Power Meters
• Consumer
• Medical and Health Care
• Distributed Power Supplies