MP4316A

MP4316A

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

Datasheet

Description

The MP4316A is a synchronous, step-down switching converter with a configurable frequency and integrated, internal high-side MOSFET (HS-FET) and low-side MOSFET (LS-FET). The device provides up to 6A of highly efficient output current (I_OUT), with current mode control for fast loop response.

The wide 3.3V to 45V input voltage (V_IN) range accommodates a variety of step-down applications in automotive input environments. A 1.7μA quiescent current (I_Q) in shutdown mode allows the device to be used in battery-powered applications.

The MP4316A achieves high power conversion efficiency across the wide load range by scaling down the switching frequency (f_SW) under light-load conditions to reduce switching and gate driver losses. An open-drain power good (PG) signal indicates when the output is within 95% to 105% of its nominal voltage.

Frequency foldback helps prevent inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. The MP4316A provides a high duty cycle and low-dropout mode for automotive cold-crank conditions.

The MP4316A is available in a QFN-20 (4mmx4mm) package.

Features & Benefits

Designed for Automotive Applications:
- Wide 3.3V to 45V Operating Input Voltage (V_IN) Range
- 6A Continuous Output Current (I_OUT)
- 100ns Minimum On Time
- Operating Junction Temperature (T_J) from -40°C to +125°C
Increases Battery Life:
- 1.7μA Low Shutdown Supply Current
- 18μA Sleep Mode Quiescent Current (I_Q)
- Advanced Asynchronous Modulation (AAM) Mode Increases Efficiency under Light Loads
High Performance for Improved Thermals:
- Internal 48mΩ High-Side MOSFET (HS-FET) and 20mΩ Low-Side MOSFET (LS-FET)
Optimized for EMC/EMI:
- 350kHz to 1000kHz Configurable Switching Frequency (f_SW) for Car Battery Applications
- Can Be Synchronized to External Clock
- Out-of-Phase Synchronized Clock Output
- Frequency Spread Spectrum (FSS) Modulation
- Symmetric VIN Pinout
- CISPR25 Class 5 Compliant
- MeshConnect^TM Flip-Chip Package
Additional Features:
- Power Good (PG) Output
- External Soft-Start (SS)
- Selectable 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 with Wettable Flank