基于TPS54260設(shè)計的GSM電源解決方案
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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
圖1.TPS54260功能方框圖
圖2.TPS54260輸出3.3V設(shè)計案例
圖2.TPS54260反向電源電路圖
圖3.TPS54260分裂電源電路圖
圖4.采用TPS54260的12V到3.8V的GSM電源電路圖
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