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说明

MCP1253-33X50和MCP1253-ADJ是无电感、正调节、低噪声电荷泵直流-直流转换器。MCP1253-33X50具有3.3或5.0 V的可选输出，而MCP1253-ADJ具有1.5至5.5 V之间的可调输出。两者都可以在选定的调节输出电压下提供120 mA的负载电流。由于该设备包含自动降压/升压功能，无论输入电压高于还是低于输出电压，它都将保持调节的输出电压。这些电荷泵的开关频率为1 MHz（减少了电容器尺寸），具有节能关闭引脚、短路保护、热关闭和报告超出调节条件的电源良好引脚。

特性

• Wide 2.1 to 5.0V input range
• Fixed, regulated 3.3 V, 5.0 V, or adjustable (1.5 to 5.5 V) outputs
• Supplies regulated output voltagesfor up to 120 mA loads
• Low 60 µA supply current in no load conditions
• High 2.5% voltage accuracy (on fixed voltage outputs)
• High1 MHz operation to avoid interference with IF bands and allows for small capacitor use to save board space and cost
• Logic level shutdown control reduces current consumption to 0.1 µA during standby operation
• Power-good output indicator with hysteresis
• Thermal shutdown protection with hysteresis
• Short circuit protection
• Soft-start circuitry to minimize inrush current
• -40 ºC to +85 ºC operation

参数