MP28257

NOT RECOMMENDED FOR NEW DESIGNS

4A, Fast Transient, 4.2V to 20V Input Synchronous Step-Down Converter

ALTERNATIVE PART

NRFND Datasheet

MP28257 continues to be in production for existing customers. Please consider this alternative for new designs:

MP2384GG-Z

4.5 to 24V, 4A, Low I_Q, Synchronous Buck Converter

Features & Benefits

Wide 4.5V to 24V Operating Input Range
105μA Low Quiescent Current
4A Continuous Output Current
Adaptive COT Control for Fast Transient
DC Auto-Tune Loop
Low R_DS(ON) Internal Power MOSFETs
Proprietary Switching Loss Reduction Technique
Power Good (PG) Indication
Fixed 700kHz Switching Frequency
Stable with POSCAP and Ceramic Capacitors
Internal Soft Start (SS)
Output Discharge
OCP, OVP, UVP, and Thermal Shutdown with Auto-Retry
Available in a QFN-11 (2mmx2mm) Package
The MPL-AL6050 Inductor Series Matches Best Performance

… and many more!

概要

The MP28257 is a fully-integrated, synchronous, step-down, switch-mode converter with a programmable frequency. It offers a very compact solution that can provide up to 4A of continuous output current over a wide input supply range with excellent load and line regulation, and can operate at high efficiency over a wide output current load range. Constant-on-time control mode provides fast transient response and eases loop stabilization. Protections include short-circuit protection, over-current protection, over-voltage protection, under-voltage protection, and thermal shut down. The MP28257 requires a minimal number of readily-available standard external components. The device is available in a space saving 2mmx3mm QFN12 package that complies with ROHS.