MPQ4331-AEC1

MPQ4331-AEC1

36V, 0.5A to 1A, Low Quiescent Current, Synchronous Step-Down Converter, AEC-Q100 Qualified

概要

The MPQ4331-AEC1 is a high-frequency, synchronous, step-down switching converter with integrated internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). The device provides 0.5A to 1A of highly efficient output current (I_OUT) with peak current mode control.

The wide 3V to 36V input voltage (V_IN) range and 42V load dump tolerance accommodate a variety of step-down applications in automotive input environments. A 1μA shutdown mode current (I_SHDN) allows the device to be used in battery-powered applications.

High power conversion efficiency across a wide load range is achieved 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 whether the output voltage (V_OUT) is within 94% to 106% of its nominal voltage.

Frequency foldback helps prevent inductor current (I_L) runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. A high duty cycle and low-dropout (LDO) mode are provided for automotive cold-crank conditions.

The MPQ4331-AEC1 is available in a space-saving TSOT23-8 package, and is available in AEC-Q100 Grade 1.

機能と利点

Designed for Automotive Applications:
- Survives 40V Load Dump
- Wide 3V to 36V Operating Input Voltage (V_IN) Range
- Supports 3V Cold Crank
- 0.5A to 1A Continuous Output Current (I_OUT) Version in Pin-Compatible Family
- 45ns Minimum On Time (t_{ON_MIN}) and 35ns Minimum Off Time (t_{OFF_MIN})
- -40°C to +150°C Operating Junction Temperature (T_J)
- Available in AEC-Q100 Grade 1
Increases Battery Life:
- 1μA Shutdown Current (I_SHDN)
- 20μA Sleep Mode Quiescent Current (I_Q)
- Advanced Asynchronous Modulation (AAM) Mode Increases Efficiency under Light Loads
- Integrated High-Side and Low-Side MOSFETs (HS-FET and LS-FET, Respectively)
Optimized for EMC/EMI Reduction:
- CISPR 25 Class 5 Compliant
- Frequency Spread Spectrum (FSS) Modulation
- Up to 2.2MHz Fixed Switching Frequency (f_SW)
Additional Features:
- Power Good (PG) Output
- Over-Current Protection (OCP) with Hiccup Mode
- Fixed-Output Options: 1V, 1.8V, 2.5V, 3V, 3.3V, 3.8V, and 5V
- Adjustable Output Voltage (V_OUT) from 0.8V
- Available in a TSOT23-8 Package
Functional Safety System Design Capable:
- MPSafe^TM Compatible – Functional Safety Supporting Document Available