tps60100
我按照datasheet的典型应用连接，为什么tps60100的输出却为5v
Haibin，
你好，TPS60100有多种模式设置，不同的模式接法不同。请问你是按哪种模式接线的？可否将原理图帖上来看看？
www.ti.com/.../tps60100
请阅读datasheet中13页的模式介绍。
你好，
你好
Haibin,
请问输入电压VBATT的电压是多大？推荐的TPS60100的输入电压的范围是1.8V~3.6V:
VBAT=3v
VBAT=3v
pulse-skip mode
In pulse-skip mode (SKIP = high), the error amplifier disables switching of the power stages when it detects an
output higher than 3.3 V. The oscillator halts. The IC then skips switching cycles until the output voltage drops
below 3.3 V. Then the error amplifier reactivates the oscillator and switching of the power stages starts again.
The pulse-skip regulation mode minimizes operating current because it does not switch continuously and
deactivates all functions except bandgap reference and error amplifier when the output is higher than 3.3 V.
When switching is disabled from the error amplifier, the load is also isolated from the input. SKIP is a logic input
and should not remain floating. The typical operating circuit of the TPS60100 in pulse skip mode is shown in
Figure 1.
constant-frequency mode
When SKIP is low, the charge pump runs continuously at the frequency fOSC. The control circuit, fed from the error amplifier, controls the charge on C1F and C2F by driving the gates of the FETs T12/T13 and T22/T23, respectively. When the output voltage falls, the gate drive increases, resulting in a larger voltage across C1F and C2F. This regulation scheme minimizes output ripple. Since the device switches continuously, the output noise contains well-defined frequency components, and the circuit requires smaller external capacitors for a given output ripple. However, constant-frequency mode, due to higher operating current, is less efficient at light loads than pulse-skip mode.
输出应固定为3.3或者3.8v才对，应该是芯片问题吧，山寨货？
你现在的电路是pulse-skip mode模式，
请你先测试一下空载情况是否正常？
半载和满载情况是否正常？
如果都有问题，请将电路接成constant-frequency mode 测试，看看是否正常？
你的芯片是否是正规渠道买的原装正品？
如果不是可以申请我们公司的样片回去测试，非正规渠道得到的芯片就不能确定了。
这些都测过了都是在3v输入下输出5v，芯片上有磨痕，背部有污渍，因此怀疑是山寨货，购买的渠道我就不大清楚了，谢谢你的回答
不客气，如果急需测试，请尽快去我们公司网站申请样片
好的，谢谢