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| 搞不清楚楼主的问题说的到底是什么,只有一个看法,不知道你的MODE选择模式是不是会影响你所应用的环境 1 m( G- O' l; g  M5 J& G1 C" `: Y- t' O1 J
 The TPS61086 is a high frequency, high efficiency DC to DC converter with an integrated 2.0 A, 0.13 Ω power
 " c0 j" c6 N+ i9 l& q9 e- {switch capable of providing an output voltage up to 18.5 V. The implemented boost converter is based on a fixed$ s5 X$ f* c' {) e
 frequency of 1.2MHz, pulse-width-modulation (PWM) controller that allows the use of small external inductors' J3 L3 a" s: a) _7 a* Z/ }
 and capacitors and provides fast transient response.
 " v4 q/ C# D1 [/ ]7 ?At light load, the device can operate in Power Save Mode with pulse-frequency-modulation (PFM) to improve the
 + h) }* T1 I# m" E/ Kefficiency while keeping a low output voltage ripple. For very noise sensitive applications, the device can be
 3 X/ j$ @' l+ a. l" b, iforced to PWM Mode operation over the entire load range by pulling the MODE pin high. The external# }+ I8 B+ g1 w- x
 compensation allows optimizing the application for specific conditions. A capacitor connected to the soft-start pin
 7 t; Q$ k: Q3 b. q/ e% \minimizes inrush current at startup.
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