NCV891930 Series

Low Quiescent Current 2 MHz Automotive Synchronous Buck Controller

Catalog

Low Quiescent Current 2 MHz Automotive Synchronous Buck Controller

Part	Output Type	Number of Outputs	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Duty Cycle (Max)	Supplier Device Package	Function	Topology	Synchronous Rectifier	Clock Sync	Frequency - Switching	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Qualification	Output Phases	Output Configuration	Control Features	Grade	Package / Case
ON Semiconductor NCV891930MW00R2G	Transistor Driver	1	3.5 V	45 V	60 %	24-QFNW (4x4)	Step-Down	Buck			2 MHz	150 °C	-40 °C	Surface Mount Wettable Flank	AEC-Q100	1	Positive	Current Limit Enable Frequency Control Soft Start Sync	Automotive	24-VFQFN Exposed Pad
ON Semiconductor NCV891930MW01R2G	Transistor Driver	1	3.5 V	45 V	60 %	24-QFNW (4x4)	Step-Down	Buck			2 MHz	150 °C	-40 °C	Surface Mount Wettable Flank	AEC-Q100	1	Positive	Current Limit Enable Frequency Control Soft Start Sync	Automotive	24-VFQFN Exposed Pad

Catalog

Low Quiescent Current 2 MHz Automotive Synchronous Buck Controller

Key Features

• 30 µA Operating Current at No Load

• 75 mV Current Limit Sensing

• Capable of 45 V Load Dump

• Board Selectable Fixed Output Voltages With Lockout

• 2 MHz Operating Frequency with synchronization capability

• Adaptive Non−Overlap Circuitry

• Integrated Spread Spectrum

• Logic level Enable Input Can be Tied Directly to Battery

• Short Circuit Protection Pulse Skip

• Battery monitoring for UVLO and Overvoltage Protection

• Thermal Shutdown (TSD)

• Adjustable Soft−Start

• Individual Enable and Reset pins

• QFN Package with Wettable Flanks (pin edge plating)

• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

Description

The NCV891930 is a 2 MHz fixed−frequency low quiescent current buck controller with spread spectrum that operates up to 38 V (typical). It may be synchronized to a clock or to separate NCV891930. Peak current mode control is employed for fast transient response and tight regulation over wide input voltage and output load ranges. Feedback compensation is internal to the device, permitting design simplification. The NCV891930 is capable of converting from an automotive input voltage range of 3.5 V (4.5 V during startup) to 18 V at a constant base switching frequency above the sensitive AM band, eliminating the need for costly filters and EMI countermeasures. The switching frequency folds back to 1 MHz for input voltages between 20 V up to 38 V (typical). Under load dump conditions up to 45 V the regulator shuts down. A high voltage bias regulator with automatic switchover to an external 5 V bias supply is used for improved efficiency. Several protection features such as UVLO, current limit, short circuit protection, and thermal shutdown are provided. High switching frequency produces low output voltage ripple even when using small inductor values and an all−ceramic output filter capacitor, forming a space−efficient switching solution.(410 kHz version offered with NCV881930)