STEVAL-PSQ001V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Power management for CPU, FPGA and memory based on the PM6680A

STEVAL-PSQ001V1
Features
Power management for CPU, FPGA and memory
based on the PM6680A
Data Brief
■ Input: 5 - 36 VDC, surge protection
■ Output voltages:
– Output1 (V_core) selectable from: 0.9, 1.0,
1.2, 1.5, 1.8 or 2.5 V, 4 A continuously (6 A
) _{peak), tolerance: 3%}
t(s – Output2 (V_i/o) selectable from: 1.0, 1.2, 1.5,
c _{1.8, 2.5 V or 3.3 V, 2 A continuously}
u _{(3 A peak), tolerance: 3%}
rod ^{– Output3 Vsys: 3.3 V 0.4 A (0.8 A peak),}
tolerance: 4%
P _{– Output3 Vaux: 2.5 V, 0.4 A, tolerance: 2%}
te _{■ Analog 5: 5 V, 0.8 A, tolerance: 4%}
ole ^{■ Analog 3.3 V: 3.3 V, 0.15 A, tolerance: 2%}
bs _Description
- ^O _{The main purpose of this evaluation board is to}
t(s) ^{show basic principles used for design of the power}
supply and to give users a working prototype for
c _{testing and daily use. The trend in recent years in}
u _{the supply of MCUs, CPUs, memories, FPGAs}
rod ^{etc. is to reduce the supply voltage, increase}
supply current and provide various voltage levels
P _{for different devices in one platform. A typical}
te ^{example of this is the FPGA. FPGAs contain core}
le ^{parts which operate with low level voltage,}
o interface parts placed between the core and the
s _{output, system parts, etc. It is important to note}
b_{that each family of parts has a slightly different}
O_{voltage level and the trend is toward decreasing}
voltage for each new family. The lowest operating
voltage currently is 1 V, and this can be expected
to drop to 0.9 V or 0.8 V in the near future. The
situation is similar with other parts of digital
solutions. Typically, the main CPU, memory, and
interfaces require different supply voltage levels.
STEVAL-PSQ001V1
reset. This limit is typically ± 3 or 5 %. On the
other hand, digital device consumption can
change very fast (approx. several amps in several
hundred nanoseconds). The power supply must
be capable of reacting very quickly with a
minimum of over/under voltage, especially in
cases where very low voltage output is required.
There is additional stress placed on power
supplies in digital applications for industrial use.
The industrial standard bus is 24 V, but this
voltage fluctuates and the maximum required
input voltage level can be up to 36 V. Additional
surge protection is also mandatory for power
supply input in industrial applications. The
purpose of this evaluation board is to address all
of required parameters outlined above. This
means satisfying industrial input requirements
(operating voltage of up to 36 V) and generating
several output voltages for middle power
applications (up to several amps). The main
output voltage level can be set easily.
Low operating voltage also bring another
challenge - transient. Digital devices are typically
sensitive to voltage level. If voltage drops below or
crosses over established limits, the device is
February 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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