產(chǎn)品描述:
BL8028 是一款高效、DC到DC降壓型開關(guān)穩(wěn)壓器,能夠提供高達(dá)1.5A 的輸出電流。
該器件在2.6V至5.5V的輸入電壓范圍內(nèi)工作,并提供0.6V至VIN的輸出電壓。 在2MHz 的固定頻率下工作允許使用小型外部元件,例如陶瓷輸入和輸出電容以及小型電感器,同時(shí)仍然提供低輸出紋波。這種低噪聲輸出以及內(nèi)部同步整流器實(shí)現(xiàn)的出色效率,使BL8028 成為大功耗線性穩(wěn)壓器的理想替代品。 內(nèi)部軟啟動(dòng)控制電路可降低浪涌電流。
短路和熱關(guān)斷保護(hù)提高了設(shè)計(jì)可靠性。
BL8028 采用 SOT23-5、DFN2x2-6 封裝。
產(chǎn)品特征:
高效率:高達(dá) 97%
高達(dá) 1.5A 的最大輸出電流
2MHz 開關(guān)頻率
低壓差 100% 占空比操作
內(nèi)部補(bǔ)償和軟啟動(dòng)
電流模式控制
參考 0.6V
邏輯控制關(guān)斷 (I Q<1uA)
熱關(guān)斷、UVLO
提供 SOT23-5、DFN2x2-6
產(chǎn)品應(yīng)用
手機(jī)
數(shù)碼相機(jī)
MP3 和 MP4 播放器
機(jī)頂盒
無(wú)線和 DSL調(diào)制解調(diào)器
筆記本電腦中的USB提供的設(shè)備
便攜式設(shè)備
DESCRIPTION
The BL8028 is a high-efficiency, DC to DC step-down switching regulators, 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, making BL8028 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.
The BL8028 is available in SOT23-5, DFN2x2-6package.
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
Reference 0.6V
Logic control shutdown (I Q<1uA)
Thermal shutdown, UVLO
Available in SOT23-5,DFN2x2-6
APPLICATIONS
Cellular phones
Digital cameras
MP3 and MP4 players
Set top boxes
Wireless and DSL modems
USB supplied devices in notebooks
Portable devices