基于TPS54260設(shè)計的GSM電源解決方案

作者：時間：2010-06-02 來源：網(wǎng)絡(luò)

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TPS54260是集成了200毫歐姆高邊MOSFET的60V/2.5A降壓穩(wěn)壓器, 電流模式控制簡化了外部補償和提供了方便選擇元件.輸入電壓從3.5V到60V,工作靜態(tài)電流138uA,關(guān)斷電流1.3uA,開關(guān)頻率100kHz到2.5MHz.主要應(yīng)用在12V,24V和48V工業(yè)與通信低壓電源,GSM和GPRS模塊電源.本文介紹了TPS54260主要特性, 功能方框圖, 輸出3.3V和4.2V設(shè)計案例, 反向和分裂電源電路圖,以及采用TPS54260開發(fā)的GSM/GPRS電源電路和材料清單, TPS54260EVM-597評估模塊的性能指標,電路圖和材料清單(BOM).

The TPS54260 device is a 60V, 2.5A, step down regulator with an integrated high side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load, regulated output supply current to 138mA. Using the enable pin, shutdown supply current is reduced to 1.3mA, when the enable pin is low.

Under voltage lockout is internally set at 2.5V, but can be increased using the enable pin. The output voltage startup ramp is controlled by the slow start pin that can also be configured for sequencing/tracking. An open drain power good signal indicates the output is within 94% to 107% of its nominal voltage.

A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition. The TPS54260 is available in 10 pin thermally enhanced MSOP Power Pad package.

TPS54260主要特性:

3.5V to 60V Input Voltage Range

200-m

High-Side MOSFET

High Efficiency at Light Loads with a Pulse Skipping Eco-Mode

138µA Operating Quiescent Current

1.3µA Shutdown Current

100kHz to 2.5MHz Switching Frequency

Synchronizes to External Clock

Adjustable Slow Start/Sequencing

UV and OV Power Good Output

Adjustable UVLO Voltage and Hysteresis

0.8-V Internal Voltage Reference

MSOP10 Package With PowerPAD

Supported by SwitcherPro Software Tool

TPS54260應(yīng)用:

12-V, 24-V and 48-V Industrial and Commercial Low Power Systems

GSM, GPRS Modules in Fleet Management, E-Meters, and Security Systems