ST8028 1.5A 2MHz Synchronous Buck Converter

Name: ST8028 1.5A 2MHz Synchronous Buck Converter
Brand: STST
SKU: ST8028

ST8028

The ST8028 is a high-efficiency synchronous step-down DC-DC converter with a 2.6V~5.5V input range and an adjustable 0.6V~VIN output, delivering up to 1.5A output current at up to 97% efficiency. Operating at a fixed 2MHz frequency, it allows the use of small ceramic capacitors and small inductors while keeping output ripple low, making it an ideal replacement for power-hungry linear regulators. It supports 100% duty-cycle low-dropout operation and integrates soft-start, internal compensation, short-circuit protection, thermal shutdown and UVLO, with logic-controlled shutdown current below 1uA. Available in SOT23-5, DFN2*2-6L and DFN1.6*1.6-6L compact packages, it is widely used in cellular phones, digital cameras, set-top boxes and portable devices.

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Specifications

Input Voltage (VIN)2.6~5.5V

Output Current (IOUT)1.5A(max)

Output Voltage (VOUT/FB)0.6V~VIN; ref 0.6V (0.588~0.612V)

FB/VOUT Accuracy-

Current Consumption (IQ)80uA (typ)

Switching Frequency2MHz (fixed)

Modulation ModePWM (current-mode)

SynchronousSynchronous

Typical PerformanceUp to 97% efficiency; 100% duty low-dropout; internal comp & soft-start; SC/OTP/UVLO protection; shutdown current <1uA

PackageSOT23-5, DFN2*2-6L, DFN1.6*1.6-6L

Product details

Overview

The ST8028 is a high-efficiency, DC to DC step-down switching regulator, capable of delivering up to 1.5A of output current. The device operates from an input voltage range of 2.6V to 5.5V and provides an output voltage from 0.6V to VIN. Working at a fixed frequency of 2MHz allows the use of small external components, such as ceramic input and output caps, as well as small inductors, while still providing low output ripples. This low noise output along with its excellent efficiency achieved by the internal synchronous rectifier, makes ST8028 an ideal replacement for large power consuming linear regulators. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal shutdown protection improves design reliability.

Features

High efficiency: up to 97%
Up to 1.5A max output current
2MHz switching frequency
Low dropout 100% duty operation
Internal compensation and soft-start
Current mode control
0.6V reference
Logic control shutdown (IQ<1uA)
Thermal shutdown, UVLO