MP4312 45 V, 2 A, Step-Down Converters

Product Highlights > MP4312 45 V, 2 A, Step-Down Converters

            MP4312 45 V, 2 A, Step-Down Converters
                    MPS’ low-IQ, synchronous step-down converters with a frequency spread spectrum are ideal for a variety of step-down applications
    

MPS’ MP4312 series configurable-frequency, synchronous step-down switching converters feature integrated internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). They provide up to 2 A of highly efficient output current (I_OUT) with current mode control for fast loop response.

The wide 3.3 V to 45 V input voltage (V_IN) range accommodates a variety of step-down applications in automotive input environments. A 1.7 μA shutdown current (I_SD) 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 the switching and gate driver losses. An open-drain power good (PG) signal indicates whether the output is within 95% to 105% 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 mode are provided for automotive cold-crank conditions.

Features

3.3 V to 45 V wide operating V_IN range
2 A continuous I_OUT
1.7 μA low I_SD
18 μA sleep mode quiescent current (I_Q)
Internal 48 mΩ/20 mΩ high-side and low-side MOSFETs (HS-FET and LS-FET)
350 kHz to 1000 kHz configurable f_SW for cars
Can be synchronized to an external clock
Out-of-phase synchronized clock output

Symmetric V_IN for low EMI
External soft start (SS)
100 ns minimum on time (t_{ON_MIN})
Selectable advanced asynchronous modulation (AAM) mode or forced continuous conduction mode (FCCM)
Overcurrent protection (OCP) with hiccup mode
Available as automotive AEC-Q100 qualified in MPQ4312 devices
Available in a QFN-20 (4 mm x 4 mm) package

Applications

Variety of step-down applications in automotive input environments

Battery-powered applications