The UCD90320 device is a 32-rail PMBus addressable power sequencer and
system manager in a compact 0.8-mm pitch BGA package.
The 24 integrated ADC channels (AMONx) monitor the power supply voltage,
current, and temperature. Eighty-four GPIO pins can be used for 8 digital
monitor (DMONx), 32 power supply enable (ENx), 24 margining (MARx), 16 Logical
GPO, 32 GPI, cascading, and system function.
The 32 ENx pins and the 16 LGPOx pins can be configured to be active driven
or open drain outputs.
Nonvolatile event logging preserves fault events after power dropout. Black
box fault log feature preserves the status for all rails and I/O pins when the
first fault occurs. The cascading feature offers convenient ways to manage up
to 128 voltage rails through one SYNC_CLK pin connection. Fault pin feature
coordinates among cascaded devices to take synchronized fault responses. The
pin-selected rail states feature employs up to 3 GPIs to control up to eight
user-defined power states. These states can implement system low-power modes
as outlined in the (ACPI) specification.
For all available packages, see the orderable addendum at the
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