UCD90120ARGCR

Using the pin-selected voltage rail state feature enables specific power states. This feature allows up to 3 GPIs to enable and disable any voltage rail. This is useful for implementing system low-power modes and for Advanced Configuration and Power Interface (ACPI) specifications for hardware devices. The UCD90120A is a 12-rail PMBus/I²C addressable power sequencer and monitor. The device integrates a 12-bit ADC capable of monitoring up to 12 power voltage inputs. 26 GPIO pins can be used for power enable, power-on reset signals, external interrupts, cascading, or other system functions. 12 of these pins provide PWM capability. With these pins, the UCD90120A supports margining as well as general-purpose PWM functions. The Fusion Digital Power™ Designer software is used for device configuration. This PC-based GUI provides an intuitive interface for configuring, storing, and monitoring all system operating parameters.

Applications

• Industrial/Automatic Test Equipment (ATE)
• Telecom and networking equipment
• Server and storage systems
• Any system requiring sequencing and monitoring of multiple power rails

Key features

• Monitoring and sequencing of 12 voltage rails
• All voltage rails sampled every 400μs
• 12-bit ADC with 2.5V, 0.5% internal VREF
• Sequencing based on time, voltage rail, and pin association
• 4 programmable UV and OV thresholds per monitor
• Non-volatile fault and peak logging per monitor (up to 12 fault detail entries)
• Programmable watchdog timer and system reset
• Flexible digital I/O configuration pins for voltage rail status selection
• Multi-phase PWM clock generator
• Clock frequency range: 15.259kHz to 125MHz
• Independent clock output configuration for synchronous switch-mode power supplies
• JTAG and I²C/SMBus/PMBus interfaces