  We study the outbursts of the black hole X-ray binaries MAXI J1659-152, SWIFT
J1753.5--0127 and GX 339-4 with the Swift X-ray Telescope. The bandpass of the
X-ray Telescope has access to emission from both components of the accretion
flow: the accretion disk and the corona/hot flow. This allows a correlated
spectral and variability study, with variability from both components of the
accretion flow. We present for the first time, a combined study of the
evolution of spectral parameters (disk temperature and radius) and timing
parameters (frequency and strength) of all power spectral components in
different spectral states. Comparison of the correlations in different spectral
states shows that the frequency and strength of the power spectral components
exhibit dependencies on the disk temperature that are different in the
(low-)hard and the hard-intermediate states; most of these correlations that
are clearly observed in the hard-intermediate state (in MAXI J1659-152 and GX
339-4) are not seen in the (low-)hard state (in GX 339-4 and SWIFT
J1753.5-0127). Also, the responses of the individual frequency components to
changes in the disk temperature are markedly different from one component to
the next. Hence, the spectral-timing evolution cannot be explained by a single
correlation that spans both these spectral states. We discuss our findings in
the context of the existing models proposed to explain the origin of
variability.
