Monolithic Power Systems features its AEC-Q100 Qualified Ultra-Low Quiescent Current Synchronous Step-Down Converter. The MPQ4346 is a configurable-frequency (350 kHz to 2.5 MHz), synchronous, step-down switching regulator with integrated internal high-side and low-side power MOSFETs. It provides up to 3 A of highly efficient output current (IOUT) with fixed-frequency, zero-delay pulse-width modulation (PWM) control to optimize transient response.
The wide 3.3 V to 36 V input voltage (VIN) range with 42 V load dump tolerance accommodates a variety of step-down applications in automotive input environments. A 1μA quiescent current (IQ) in shutdown mode allows the device to be used in battery-powered applications.
High power conversion efficiency across the wide load range is achieved by scaling down the switching frequency under light-load conditions to reduce switching and gate driver losses. An open-drain power good signal indicates whether the output is within 94% to 106% of its nominal voltage.
Thermal shutdown provides reliable, fault-tolerant operation. A high-duty cycle and low-dropout mode are provided for automotive cold-crank conditions.
The MPQ4346 is available in a QFN-17 (3 mm x 4 mm) package, and is AEC-Q100 qualified.
Key features and benefits
Designed for Automotive Applications
- 42 V Load Dump Tolerance
- Supports 3.1 V Cold Crank
- Low-Dropout Mode
- 3 A Continuous Output Current (IOUT)
- Continuous Operation Up to 36 V
- Zero-Delay Pulse-Width Modulation (PWM) Control
- 20 ns Minimum On Time
- -40°C to +150°C Operating Junction Temperature
- Available in AEC-Q100 Grade 1
Increases Battery Life
- 1 μA Low Shutdown Supply Current
- 3 μA Sleep Mode Quiescent Current (IQ)
- Advanced Asynchronous Modulation (AAM) Mode Increases Efficiency under Light Loads
High Performance for Improved Thermals
- Internal 60 mΩ High-Side MOSFET and 35 mΩ Low-Side MOSFET
Optimized for EMC/EMI Reduction
- 350 kHz to 2.5 MHz Configurable Switching Frequency
- Symmetric VIN Pinout
- Frequency Spread Spectrum Modulation
- CISPR25 Class 5 Compliant
- MeshConnect Flip-Chip Package
Additional Features:
- Fixed Output Options: 1 V, 1.1 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 3.7 V, 3.8 V, and 5 V
- Power Good Output
- Synchronizable to an External Clock
- Synchronized Clock Output
- External Soft Start
- Over-Current Protection with Hiccup Mode
- Available in a QFN-17 (3 mm x 4 mm) Package
Click here to learn more about MPQ4346GLE-33-AEC1-Z
