Overview
The UCD9090RGZT, 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 voltage rails in complex electronic systems, ensuring proper power sequencing and monitoring during both normal and fault conditions. It integrates a 12-bit ADC for monitoring up to 10 power-supply voltage inputs and features 23 GPIO pins, with 10 of these pins offering PWM functionality. The UCD9090 is particularly useful in systems requiring precise power management, such as those found in industrial, telecommunications, and server environments. The device is configurable using the TI Fusion Digital Power™ designer software, which provides an intuitive interface for setting up and monitoring system parameters.
Key Specifications
| Parameter | Value |
|---|---|
| Package | VQFN (RGZ) with 48 pins |
| Operating Temperature Range | -40°C to 125°C |
| ADC Resolution | 12-bit |
| Internal VREF | 2.5 V, 0.5% |
| Sampling Rate | All rails sampled every 400 μs |
| Undervoltage and Overvoltage Thresholds | Four programmable thresholds per monitor |
| Margining Capability | Closed-loop margining for 10 rails |
| Watchdog Timer and 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 and I2C/SMBus/PMBus™ |
Key Features
- Monitor and sequence 10 voltage rails based on time, rail, and pin dependencies
- Nonvolatile error and peak-value logging per monitor (up to 30 fault detail entries)
- Closed-loop margining for 10 rails with adjustable margin thresholds
- Programmable watchdog timer and system reset
- Flexible digital I/O configuration with up to 23 GPIO pins
- Pin-selected rail states for implementing system low-power modes and ACPI specification
- Cascading multiple devices for expanded functionality
- 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 UCD9090RGZT? The UCD9090RGZT is a 10-rail PMBus/I2C addressable power-supply sequencer and monitor, designed to manage and monitor multiple voltage rails in electronic systems.
- How many voltage rails can the UCD9090RGZT monitor and sequence? The UCD9090RGZT can monitor and sequence up to 10 voltage rails.
- What is the resolution of the ADC in the UCD9090RGZT? The ADC has a 12-bit resolution.
- What is the internal VREF of the UCD9090RGZT? The internal VREF is 2.5 V with a 0.5% accuracy.
- How often are the voltage rails sampled by the UCD9090RGZT? All rails are sampled every 400 μs.
- Does the UCD9090RGZT support margining? Yes, it supports closed-loop margining for up to 10 voltage rails.
- What interfaces does the UCD9090RGZT support? The device supports JTAG and I2C/SMBus/PMBus™ interfaces.
- How is the UCD9090RGZT configured? The device is configured using the TI Fusion Digital Power™ designer software.
- What types of applications is the UCD9090RGZT suitable for? It is suitable for industrial, telecommunications, server, and any system requiring sequencing and monitoring of multiple power rails.
- Can the UCD9090RGZT be cascaded with other devices? Yes, it supports cascading multiple devices for expanded functionality.
