ST2S06
Product Page
The new ST2S06 is an innovative dual step-down converter able to
satisfy the ever increasing demand for highly integrated devices,
reducing the PCB area in budget-minded portable applications. Two
versions of ST2S06 are currently available with the two fold purpose
of supplying an entire optical disk drive power board and to provide
a highly compact point of load solution for medium power loads.
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Customization And
Commodity All In One |
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ST2S06A has been specifically designed and tailored for high-end
optical storage devices. It is able to supply the read channel LSI
and the DSP / RF amplifier using only switching regulators. This
minimizes the electrical losses for which linear regulators are
definitely not the best in class solution. The ST2S06A integrates
a reset block to avoid system malfunctioning that could occur if
the input supply voltage extended out of the allowable range. Channel
1 output voltage is fixed to 3.3 V (2.5, 1.8, 1.5, 1.2 V under request)
while channel 2 is adjustable from 0.8 V to 5 V.
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Complete Solution
With ST8R00 |
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An ideal partner of this device in high definition optical drives
is the step-up converter ST8R00 which is designed to supply the
blue laser diode. Together with ST2S06 it provides the application
with a complete solution for the main board power management. ST2S06B
replaces the reset with the enable feature making the device suitable
for a wide range of applications especially where the power dissipation
and the consumption current are critical concerns for a proper and
optimum functionality of the whole system. The highest application
flexibility is guaranteed with the programmability of both output
channels, starting from 0.8 V, by means of external resistor dividers.
Because of the integrated synchronous rectification, the 1.5 MHz
switching frequency, the intrinsic stability and the low output
ripple, the external passive components can be small, low cost SMD
inductors and capacitors.
Dual step-down, PWM controller with embedded synchronous rectifier
Enable function (“B”)
Reset output flag monitoring the input (“A”)
High efficiency (Typ. 90 % @Vout = 1.2 V)
Very low ripple in all operating conditions
Fully integrated compensation network
Very small QFN12-4x4 mm package
Medium power step-down points of load
Stand-alone DVD player / recorder
Half height and slim DVD-RW, HD-DVD, Blu-ray Disc
ST2S06 application schematic
Part
number
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Iout
[A] |
PWM fs
[MHz]
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Key
features
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Vout
Range
[V]
|
Vin
[V]
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0.5
+ 0.5 |
1.5
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reset
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0.8
to 5 |
6 |
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inhibit
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