MP4573

MP4573

60V, 2.5A, Fully Integrated, High-Efficiency, Synchronous Buck Converter

Datasheet

Description

The MP4573 is a fully integrated, fixed-frequency, synchronous step-down converter. It can achieve up to 2.5A of continuous output current (I_OUT) with peak current control for excellent transient response. The wide 4.5V to 60V input voltage (V_IN) range accommodates a variety of step-down applications in automotive input environments. The device’s 2μA shutdown current makes it ideal for battery-powered applications. The MP4573’s integrated, internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively) provide high efficiency without the need for an external Schottky diode. Advanced asynchronous modulation (AAM) mode achieves high efficiency under light-load conditions by scaling down the frequency to reduce switching and gate driver losses.

Features include built-in soft start (SS), enable (EN) control, and power good (PG) indication. The high duty cycle and low-dropout (LDO) mode allow the device to withstand automotive cold crank conditions. The MP4573 employs over-current protection (OCP) with valley current detection to avoid current runaway. It also features short-circuit protection (SCP) with hiccup mode, input under-voltage lockout (UVLO), and auto-recovery thermal protection.

With internal compensation, the MP4573 offers an ultra-compact solution that requires a minimal number of readily available, standard external components. It is available in a QFN-12 (2.5mmx3mm) package.

Features & Benefits

Wide 4.5V to 60V Operating Input Range
2.5A Continuous Output Current
High-Efficiency, Synchronous Mode Control
250mΩ/45mΩ Internal Power MOSFETs
Up to 2.2MHz Configurable Frequency
180° Out-of-Phase SYNCO Clock
40μA Quiescent Current (I_Q)
Low 2μA Shutdown Current
FB Tolerance: 1% at Room Temp, 2% Across Full Temperature Range (-40°C to +125°C)
Selectable Advanced Asynchronous Modulation (AAM) Mode or Forced Continuous Conduction Mode (FCCM) during Light-Load Operation
0.45ms Internal Soft Start (SS)
Remote Enable (EN) Control
Power Good (PG) Indicator
Low-Dropout Mode
Over-Current Protection (OCP)
Short-Circuit Protection (SCP) with Hiccup Mode
V_IN Under-Voltage Lockout (UVLO)
Thermal Shutdown
Available in a QFN-12 (2.5mmx3mm) Package
Available in a Wettable Flank Package