EUP3458-1.2A, 30V, 1.2MHz Step-Down DC-DC Converter

Introduction

The EUP3458 is a step-down DC-DC converter with a current-mode pulse width modulation (PWM) architecture, which can provide a load current of 1.2A with good line regulation and load regulation. EUP3458 can work stably in a wide input voltage range of 4.5V~30V, and can achieve an output voltage of 0.8V~15V through external voltage divider adjustment.

EUP3458 has protection mechanisms such as periodic peak current limit and over-temperature to ensure the safety of chip operation. The quiescent current of the chip in shutdown mode can be as low as 1μA. The internal soft-start function can well suppress the inrush current and the overshoot of the output voltage.

EUP3458 adopts SOT23-6 and TSOT23-6 packages, and realizes the converter function through a small number of standard peripheral devices, which effectively saves the application space.

Features

With 1.2A output current

Internally integrated DMOS switch with lower impedance of 0.3Ω, which generates lower heat during operation (MP2359 is 0.35Ω, and generates slightly more heat during operation)

Input voltage range: working voltage 4.5V to 30V, maximum withstand voltage 35V (MP2359 working voltage 24V, maximum withstand voltage 26V)

Adjustable output voltage: 0.8V to 15V

Efficiency up to 92%_

Shutdown current as low as 1µA

Quiescent operating current/power consumption 0.55mA (MP2359 power consumption 0.8mA)

Up to 90% duty cycle (87% for MP2359)

1.2-1.4MHZ fixed switching frequency

Over temperature protection and over current protection

Input undervoltage lockout

SOT23-6 package

Compliant with RoHS and Pb-Free

application

Distributed Power System

car charger

battery charger

Front Power Supply for Linear Converters

WLED driver

Professional management of various FETs, triodes, IGBTs, thyristors, voltage regulator ICs, Schottky, fast recovery, DIP/SMD series,

Mainly used in lithium battery protection board/** brushless ESC, computer motherboard graphics card/brushless motor, solar/LED lighting power supply,

UPS power supply/electric vehicle controller, HID lamp/inverter, power adapter/switching power supply, ballast, automotive electronics, etc.