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CX8508

Monolithic Synchronous Buck Regulator / 2A Output Current

Unspecified 

李华：１３５０９６８５２８６　　　ＱＱ：１８３９８４５８９８　　　　　邮箱：ｌｘｈ＠ｓｚｓｅｍｉ．ｃｏｍ

深圳市诚芯微科技有限公司　　　　　　　　　　　　　　　　　　　　　　ＣＸ８５０８

DESCRIPTION

The CX8508 is a monolithic synchronous buck

regulator. The device integrates 100mΩ

MOSFETS that provide 2A continuous load cur-

rent over a wide operating input voltage of

4.75V to 25V. Current mode control provides

fast transient response and cycle-by-cycle cur-

rent limit.

An adjustable soft-start prevents inrush current

at turn-on. In shutdown mode, the supply cur-

rent drops below 1 μA.

This device, available in an 8-pin SOIC pack-

age, provides a very compact system solution

with minimal reliance on external components.

FEATURES

z 2A Output Current

z Wide 4.75V to 25V Operating Input Range

z Integrated 100mΩ Power MOSFET Switches

z Output Adjustable from 0.925V to 20V

z Up to 95% Efficiency

z Programmable Soft-Start

z Stable with Low ESR Ceramic Output Capaci-

tors

z Fixed 400KHz Frequency

z Cycle-by-Cycle Over Current Protection

z Input Under Voltage Lockout

z Thermally Enhanced 8-Pin SOIC Package

APPLICATIONS

z Distributed Power Systems

z Networking Systems

z Set-top Box

z LCD TV/Monitor

z Notebook or Mini-Book

PACKAGE REFERENCE

Part number

CX8508

Package

SOP8

Temperature

–20° C to +85° C

ABSOLUTE MAXIMUM RATINGS (1)

Supply Voltage (VIN) .......................-0.3V to 26V

Switch Voltage (VSW) ...................–1V to VIN + 0.3V

Bootstrap Voltage (VBS) .. .Vsw-0.3V to VSW + 6V

Enable/UVLO Voltage (VEN) ............–0.3V to +6V

Comp Voltage (VCOMP) .....................–0.3V to +6V

Feedback Voltage (VFB) ..................–0.3V to +6V

Junction Temperature ........................... +150°C

Lead Temperature ................................. +260°C

Storage Temperature ............... –55°C to + 150°C

Recommended Operating Conditions(2)

Input Voltage (VIN) ....................... 4.75V to 25V

Output Voltage (VSW) ..................... 0.925 to 20V

Operating Temperature ...................–20°C to +85°C

Thermal Resistance(3) θJA θJC

SOIC8N .....................................50.... 10... °C/W

Notes:

1) Exceeding these ratings may damage the device.

2) The device is not guaranteed to function outside of its

operating conditions.

3) Measured on approximately 1” square of 1 oz copper.

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