Overview
The UCD9090RGZR, produced by Texas Instruments, is a 10-rail PMBus/I2C addressable power-supply sequencer and monitor. This device is designed to manage and monitor multiple power rails in complex electronic systems, ensuring correct power sequencing and continuous monitoring of rail voltages, currents, and temperatures. It integrates a 12-bit ADC for monitoring up to 10 power-supply voltage inputs and supports various system functions through its 23 GPIO pins. The UCD9090 is particularly useful in implementing system low-power modes and adhering to the Advanced Configuration and Power Interface (ACPI) specification. The device is configured and monitored using the TI Fusion Digital Power™ designer software, which provides an intuitive interface for setting and monitoring system parameters.
Key Specifications
| Parameter | Specification |
|---|---|
| Number of Rails | Up to 10 |
| ADC Resolution | 12-bit |
| Internal VREF | 2.5 V, 0.5% |
| Sampling Rate | Every 400 μs |
| Undervoltage/Overvoltage Thresholds | Four programmable thresholds per monitor |
| Nonvolatile Error Logging | Up to 30 fault detail entries per monitor |
| Margining Capability | Closed-loop margining for 10 rails |
| Watchdog Timer | Programmable |
| System Reset | Programmable |
| Digital I/O Configuration | Flexible, with up to 23 GPIO pins |
| PWM Clock Generator | Clock frequencies from 15.259 kHz to 125 MHz |
| Interfaces | JTAG, I2C/SMBus/PMBus™ |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | 48-Pin VQFN with Thermal Pad |
Key Features
- Monitor and sequence up to 10 voltage rails based on time, rail, and pin dependencies.
- All rails sampled every 400 μs with a 12-bit ADC.
- Four programmable undervoltage and overvoltage thresholds per monitor.
- Nonvolatile error and peak-value logging per monitor (up to 30 fault detail entries).
- Closed-loop margining for 10 rails with margin output adjusting rail voltage to match user-defined margin thresholds.
- Programmable watchdog timer and system reset.
- Flexible digital I/O configuration with up to 23 GPIO pins, including PWM functionality.
- Pin-selected rail states allowing for the implementation of system low-power modes and ACPI specification.
- Cascading multiple devices and multi-phase PWM clock generator for synchronizing switch-mode power supplies.
- JTAG and I2C/SMBus/PMBus™ interfaces for communication.
Applications
- Industrial and Automated Test Equipment (ATE).
- Telecommunications and networking equipment.
- Servers and storage systems.
- Any system requiring sequencing and monitoring of multiple power rails.
Q & A
- What is the primary function of the UCD9090RGZR?
The primary function of the UCD9090RGZR is to monitor and sequence up to 10 voltage rails in electronic systems, ensuring correct power sequencing and continuous monitoring of rail voltages, currents, and temperatures. - How often are the voltage rails sampled by the UCD9090RGZR?
The voltage rails are sampled every 400 μs. - What type of ADC does the UCD9090RGZR use?
The UCD9090RGZR uses a 12-bit ADC with a 2.5-V, 0.5% internal VREF. - What is the purpose of the TI Fusion Digital Power™ designer software?
The TI Fusion Digital Power™ designer software provides an intuitive interface for configuring, storing, and monitoring all system operating parameters of the UCD9090RGZR. - Can the UCD9090RGZR be used in low-power modes?
Yes, the UCD9090RGZR supports pin-selected rail states, which can be used to implement system low-power modes as specified by the Advanced Configuration and Power Interface (ACPI) specification. - What types of interfaces does the UCD9090RGZR support?
The UCD9090RGZR supports JTAG, I2C/SMBus/PMBus™ interfaces. - How many GPIO pins does the UCD9090RGZR have?
The UCD9090RGZR has 23 GPIO pins, with 10 of these pins offering PWM functionality. - What is the operating temperature range of the UCD9090RGZR?
The operating temperature range of the UCD9090RGZR is -40°C to 125°C. - Can multiple UCD9090RGZR devices be cascaded?
Yes, multiple UCD9090RGZR devices can be cascaded to manage more complex power supply systems. - What is the purpose of the multi-phase PWM clock generator in the UCD9090RGZR?
The multi-phase PWM clock generator allows for the configuration of independent clock outputs to synchronize switch-mode power supplies, with clock frequencies ranging from 15.259 kHz to 125 MHz.
