OrderMP4558
NOT RECOMMENDED FOR NEW DESIGNS
1A, 2MHz, 55V Step-Down Converter with Superior Light-Load Efficiency. Available in Automotive (AEC-Q100) and Industrial Grade
MP4558 continues to be in production for existing customers. Please consider this alternative for new designs:
MP4571
Active
MP4571
Active
High-Efficiency, 1A, 60V, Fully Integrated Synchronous Buck Converter
Features & Benefits
- Wide 4.5V to 60V Operating Input Range
- 1A Continuous Output Current
- High-Efficiency Synchronous Mode Control
- 250mΩ/45mΩ Internal Power MOSFETs
- Configurable Frequency Up to 2.2MHz
- 180° Out-of-Phase SYNCO Clock
- 40μA Quiescent Current
- Low Shutdown Mode Current: 2μA
- FB Tolerance: 1% at Room Temp, 2% at Full Temp
- Selectable AAM or Forced CCM Operation at Light Load
- Internal 0.45ms Soft Start
- Remote EN Control
- Power Good (PG) Indicator
- Low-Dropout Mode
- Over-Current Protection (OCP)
- Short-Circuit Protection with Hiccup Mode
- VIN Under-Voltage Lockout (UVLO)
- Thermal Shutdown
- Available in a QFN-12 (2.5mmx3mm) Package
… and many more!
Active Part Numbers:
MP4558DN-LF-P MP4558DN-LF-Z MP4558DQ-LF-P MP4558DQ-LF-Z
Meaning of P & Z 
Recommended Inductors
Part Number
L (µH)
RDC (typ) (mΩ)
IR (40K) (A)
Isat (30%) (A)
MPL-AT2512-3R3
Low-Profile Molded Inductor 3.3µH
3.3
116
2.2
3
L (µH)
RDC (typ) (mΩ)
IR (40K) (A)
Isat (30%) (A)
3.3
116
2.2
3
MPL-AY3020-3R3
Molded Inductor 3.3µH
3.3
121
2.5
3.7
L (µH)
RDC (typ) (mΩ)
IR (40K) (A)
Isat (30%) (A)
3.3
121
2.5
3.7
MPL-SE2512-3R3
Semi-Shielded Inductor 3.3µH
3.3
90
2.1
2.4
L (µH)
RDC (typ) (mΩ)
IR (40K) (A)
Isat (30%) (A)
3.3
90
2.1
2.4
Show more
*Based on Nominal Values
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