MP4561

MP4561

NOT RECOMMENDED FOR NEW DESIGNS

1.5A, 2MHz, 55V Step-Down Converter

ALTERNATIVE PART

NRFND Datasheet

MP4561 continues to be in production for existing customers. Please consider this alternative for new designs:

MP4572GQB

High-Efficiency, 2A, 60V, Fully Integrated Synchronous Buck Converter

Features & Benefits

Wide 4.5V to 60V Operating Input Votlage (V_IN) Range
2A Continuous Output Current (I_OUT)
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 (I_Q)
Low Shutdown Mode Current: 2μA
FB Tolerance: 1% at Room Temp, 2% at Full Temp
Selectable AAM or FCCM Operation at Light Loads
Internal 0.45ms Soft Start (SS)
Remote 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

… and many more!

Description

The MP4561 is a high frequency step-down switching regulator with integrated internal high-side high voltage power MOSFET. It provides 1.5A output with current mode control for fast loop response and easy compensation. The wide 4.5V to 55V input range accommodates a variety of step-down applications, including those in automotive input environment. A 12µA shutdown mode supply current allows use in battery-powered applications. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition to reduce the switching and gate driving losses. The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation. By switching at 2MHz, the MP4561 is able to prevent EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications. The MP4561 is available in small 3x3mm 10-pin QFN with exposed pad package.

Features & Benefits

Wide 4.5V to 55V Operating Input Range
300mΩ Internal Power MOSFET
Up to 2MHz Programmable Switching Frequency
120μA Quiescent Current
Ceramic Capacitor Stable
External Soft-Start
Up to 95% Efficiency
Output Adjustable from 0.8V to 52V
Available in 3x3mm 10-Pin QFN

Active Part Numbers:

MP4561DQ-LF-P MP4561DQ-LF-Z

Meaning of P & Z

Related Products

EV4561DQ-00A 1.5A, 55V, 2MHz Step-Down Converter Evaluation Board

The EV4561DQ-00A is an evaluation board for the MP4561, a high frequency step-down regulator with an integrated power MOSFET.

The MP4561 integrates a 300mΩ MOSFET that provides 1.5A load current over a wide operating input voltage of 4.5V to 55V.

Current mode control provides fast transient response and eases loop stabilization. An external soft-start prevents inrush current at turn-on.

The EV4561DQ-00A is a fully assembled and tested PCB. It generates a +3.3V output voltage at load current up to 1.5A from an 8V to 55V input range. Switching frequency is set at 500KHz.

$25.00
+ tax