DESCRIPTION

The MPQ9842 is a high-frequency,

synchronous, rectified, step-down, switch-mode

converter with built-in power MOSFETs. It

offers a very compact solution that achieves 2A

of continuous output current with excellent load

and line regulation over a wide 3.3V to 36V

input supply range. The switching frequency is

programmable or can be synchronized to an

external clock in the range of 350kHz to

2.5MHz. Synchronous operation and ultra-low

14μA sleep mode quiescent current provide

high efficiency over the output current load

range, allowing the MPQ9842 to be used in a

variety of step-down applications in automotive

input environments and battery-powered

applications.

Peak-current-mode operation provides fast

transient response and eases loop stabilization.

The excellent low dropout performance allows

the MPQ9842 to be used in high duty cycle

applications.

Full protection features include over-current

protection (OCP), short-circuit protection (SCP),

and thermal shutdown. An open-drain power

good (PG) signal indicates when the output is

within 10 of its nominal voltage.

The MPQ9842 is available in a space-saving

QFN-16 (3mmx4mm) package.

FEATURES

• 2μA Low Shutdown Supply Current

• 14μA No-Load Quiescent Current

• Internal 125mΩ High-Side and 55mΩ Low-

Side MOSFET

• 350kHz to 2.5MHz Programmable Switching

Frequency

• Power Good (PG) Output

• External Soft Start (SS)

• 80ns Minimum On Time

• Selectable Forced CCM and AAM

• Hiccup Over-Current Protection (OCP)

• AEC-Q100 Grade-1

• Available in a QFN-16 (3mmx4mm)

Package

APPLICATIONS

• Automotive Systems

• Industrial Power Systems