The NCV8877 is a Non-Synchronous Boost controller designed to

supply a minimum output voltage during Start-Stop vehicle operation

battery voltage sags. The controller drives an external N-channel

MOSFET. The device uses peak current mode control with internal

slope compensation. The IC incorporates an internal regulator that

supplies charge to the gate driver.

Protection features include, cycle-by-cycle current limiting and

thermal shutdown.

Additional features include low quiescent current sleep mode

operation. The NCV8877 is enabled when the supply voltage drops

below the wake up threshold. Boost Operation is initiated when the

supply voltage drops below the regulation set point.

Features

• Automatic Enable Below Wake Up Threshold Voltage (Factory

Programmable)

• Override Disable Function

• Boost Mode Operation at Regulation Set Point

• 2 Output Accuracy Over Temperature Range

• Peak Current Mode Control with Internal Slope Compensation

• Externally Adjustable Frequency Operation

• Wide Input Voltage Range of 2 V to 40 V, 45 V Load Dump

• Low Quiescent Current in Sleep Mode (<12 A Typical)

• Cycle−by−Cycle Current Limit Protection

• Hiccup−Mode Overcurrent Protection (OCP)

• Thermal Shutdown (TSD)

• This is a Pb−Free Device

• NCV Prefix for Automotive and Other Applications Requiring

Unique Site and Control Change Requirements; AEC−Q100

Typical Applications

• Applications Requiring Regulated Voltage through Cranking and

Start−Stop Operation