MP4316

MP4316

45V, 6A, Low I_Q, Synchronous Step-Down Converter with Frequency Spread Spectrum

Datasheet

Description

The MP4316 is a frequency-configurable, synchronous, step-down switch-mode converter with integrated, internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). It can achieve up to 6A of highly efficient, continuous output current (I_OUT), with current control mode for fast loop response.

The wide 3.3V to 45V input voltage (V_IN) range accommodates a variety of step-down applications in an automotive input environment. The device’s 1.7μA shutdown current (I_SD) makes it well-suited for battery-powered applications.

The MP4316 provides high power conversion efficiency across the entire load range. Advanced asynchronous modulation (AAM) mode achieves high efficiency under light-load conditions by scaling down the switching frequency (f_SW) to reduce the switching and gate driver losses.

An open-drain power good (PG) signal indicates whether the output is between 95% and 105% of its nominal voltage. High duty cycle and low-dropout mode allow the device to withstand automotive cold-crank conditions.

Full protection features include frequency foldback to prevent inductor current (I_L) runaway during start-up, over-current protection (OCP) with hiccup mode, and thermal shutdown for reliable, fault-tolerant operation. The MP4316 is available in a QFN-20 (4mmx4mm) package.

Features & Benefits

Wide 3.3V to 45V Operating Input (V_IN) Voltage Range
Up to 6A of Continuous Output Current (I_OUT)
Low 1.7μA Shutdown Current (I_SD)
18μA Sleep Mode Quiescent Current (I_Q)
Internal 48mΩ and 20mΩ Power MOSFETs
350kHz to 1000kHz Configurable Switching Frequency (f_SW) for Car Battery Applications
External SYNC Clock
Out-of-Phase Synchronized Clock Output
Frequency Spread Spectrum (FSS) for Low EMI
Symmetric V_IN for Low EMI
Power Good (PG) Output
External Soft Start (SS)
100ns Minimum On Time (t_{ON_MIN})
Selectable Advanced Asynchronous Modulation (AAM) Mode or Forced Continuous Conduction Mode (FCCM)
Low-Dropout Mode
Over-Current Protection (OCP) with Hiccup Mode
Available in a QFN-20 (4mmx4mm) Package
Available in a Wettable Flank Package