- MP4573
MP4573
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Description
The MP4573 is a fully integrated, fixed-frequency, synchronous step-down converter. It can achieve up to 2.5A of continuous output current (IOUT) with peak current control for excellent transient response. The wide 4.5V to 60V input voltage (VIN) 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.
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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 (IQ)
- 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
- VIN Under-Voltage Lockout (UVLO)
- Thermal Shutdown
- Available in a QFN-12 (2.5mmx3mm) Package
- Available in a Wettable Flank Package

Active Part Numbers:
MP4573GQBE-Z MP4573GQBE-P
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
MP4573 Resources
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PRODUCT CATEGORY
VIN (MAX) > 48VPRODUCT CATEGORY -
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