MPQ4385A-AEC1

MPQ4385A-AEC1

36V, 20A to 25A, Low-EMI, Synchronous Step-Down Converter with ZDP^TM, AEC-Q100 Qualified

Description

The MPQ4385A-AEC1 is a configurable-frequency (200kHz to 2.5MHz) synchronous step-down switching regulator with integrated internal high-side and low-side MOSFETs (HS-FET and LS-FET, respectively). It provides a highly efficient 20A to 25A output current (I_OUT) with fixed frequency Zero-Delay pulse-width modulation (PWM) (ZDP^TM) control for optimal transient response. The wide 3.3V to 36V input voltage (V_IN) range accommodates a variety of step-down applications in automotive environments. A 1.5μA shutdown mode quiescent current (I_Q) 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 95% to 105% of its nominal value.

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

The MPQ4385A-AEC1 is available in a TQFN-32 (5mmx6mm) package, and a high thermal conductivity package option is also offered to facilitate top-sided cooling applications. It is available in AEC-Q100 Grade 1.

Features & Benefits

Designed for Automotive Transients:
- 3.3V to 36V Input Voltage (V_IN) Range
- Load Dump Up to 40V
- Low-Dropout (LDO) Mode with Soft Recovery
- Available in AEC-Q100 Grade 1
Highly Scalable Family:
- 20A to 25A Output Current (I_OUT) Versions in Pin-Compatible Family
- Multi-Phase Capable Up to 8 Phases
Designed for High Performance and Reduced Component Overhead:
- Zero-Delay PWM (ZDP^TM) Control for Extremely Fast Transient Response and Minimal External Capacitors
- ±1% Output Accuracy, ±1% PG Accuracy
- Fixed or Adjustable I_OUT Options
- Fixed Output: 0.8V, 1V, 1.2V, 1.8V, 3.3V, 3.4V, 3.8V, 4.5V, or 5V
- Adjustable Output Up to 13V
- Output Discharge from SW to GND
- 20ns Minimum On Time (t_{ON_MIN}) to Allow High Ratio Conversion

High Efficiency for Increased Battery Life and Improved Thermals:

10μA Standby Current
Advanced Asynchronous Modulation (AAM) Mode Increases Efficiency under Light Loads
Integrated Low-Resistance High-Side and Low-Side MOSFETs (HS-FET and LS-FET, Respectively)
Thin QFN with High Thermal Conductivity to Facilitate Top-Side Cooling

Optimized for Low EMC/EMI:

200kHz to 2.5MHz Configurable Switching Frequency (f_SW)
Symmetric V_IN Pinout Placement
Low Noise at High Frequency Bands via QuietFET^TM Advanced Switching Technology
Frequency Spread Spectrum (FSS) Modulation
Synchronizable to an External Clock
CISPR 25 Class 5 Compliant
Available in a Mesh-Connect^TM Flip-Chip TQFN-32 (5mmx6mm) Package with Wettable Flanks