UCD9090 - 10-Rail Power Sequencer & Monitor | Texas Instruments
料号： UCD9090 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
UCD9090 概述
A power-supply sequencer and monitor is a specialized power management IC that controls the order in which multiple voltage rails are turned on and off during system startup and shutdown. This is critical in complex electronic systems where certain rails must be established before others to prevent latch-up, excessive current draw, or damage to sensitive components. The UCD9090 sits within the power management IC hierarchy, specifically under the category of sequencers and monitors, which are essential for reliable multi-rail power delivery in servers, networking equipment, and industrial systems.
Key features of the UCD9090 include its 10-channel sequencing capability, 12-bit ADC for accurate voltage monitoring, and PMBus/I2C interface for configuration and telemetry. The device supports ACPI (Advanced Configuration and Power Interface) for advanced power management in computing systems. Its GPIO pins provide versatile control options, including PWM outputs for margining or dynamic voltage scaling. The UCD9090 is designed for high-reliability applications, with a wide operating temperature range and robust fault handling.
Technically, the UCD9090 uses a digital state machine to manage sequencing sequences, which can be programmed via PMBus commands. The integrated ADC samples each rail's voltage and compares it against programmable thresholds, triggering faults if voltages exceed or fall below limits. The device can also log fault events and report them to a host controller. This architecture enables precise, repeatable power sequencing and monitoring, reducing the need for external supervisory circuits.
Typical applications include server and storage systems, networking equipment, telecommunications infrastructure, and industrial control systems. In these applications, the UCD9090 ensures that power rails are sequenced correctly, preventing system failures and improving reliability. Its PMBus interface allows for real-time monitoring and control, making it ideal for systems that require dynamic power management.
When designing with the UCD9090, it is important to configure the sequencing parameters and fault thresholds via PMBus to match the specific power-up requirements of the system. Proper decoupling and layout are essential to ensure accurate ADC readings and stable operation. The device's flexibility in GPIO assignment should be leveraged to optimize board layout and minimize signal routing complexity.
直接替换替代料： UCD9090 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
UCD9090A
✅ 直接替换📋 参考替代料（不在目录中）
UCD9090QRGZRQ1
✅ 直接替换📋 参考替代料（不在目录中）
UCD9090RGZR
✅ 直接替换📋 参考替代料（不在目录中）
UCD9090RGZT
✅ 直接替换📋 参考替代料（不在目录中）
UCD9081
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
UCD9090 规格参数
| Number of Channels | 10 |
| ADC Resolution | 12-bit |
| 接口 | PMBus/I2C |
| GPIO Pins | 23 |
| PWM Pins | 10 |
| 封装 | 48-VQFN (7x7) |
| ACPI Support | Yes |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| REACH Status | Compliant |
| AEC-Q100 Qualified | No (standard version) |
UCD9090 引脚配置
| 引脚 1 | V33 — 3.3V supply for internal logic |
| 引脚 2 | GND — Ground |
| 引脚 3 | GPIO0 — General purpose I/O, can be used as enable or interrupt |
| 引脚 4 | GPIO1 — General purpose I/O, can be used as enable or interrupt |
| 引脚 5 | GPIO2 — General purpose I/O, can be used as enable or interrupt |
| 引脚 6 | GPIO3 — General purpose I/O, can be used as enable or interrupt |
| 引脚 7 | GPIO4 — General purpose I/O, can be used as enable or interrupt |
| 引脚 8 | GPIO5 — General purpose I/O, can be used as enable or interrupt |
| 引脚 9 | GPIO6 — General purpose I/O, can be used as enable or interrupt |
| 引脚 10 | GPIO7 — General purpose I/O, can be used as enable or interrupt |
| 引脚 11 | GPIO8 — General purpose I/O, can be used as enable or interrupt |
| 引脚 12 | GPIO9 — General purpose I/O, can be used as enable or interrupt |
典型应用
UCD9090 适用于 6 应用s: Server Power Sequencing, Networking Equipment Power Management, Telecommunications Base Station Power, Industrial Control Systems, Automotive Power Management, FPGA and ASIC Power Sequencing.
Server Power Sequencing
The UCD9090 sequences up to 10 power rails in server systems, ensuring correct power-up order to prevent latch-up and damage. Its 12-bit ADC monitors each rail, and PMBus interface allows real-time telemetry. With 23 GPIOs and 10 PWM outputs, it can control enables and margining, making it ideal for high-density computing platforms where reliable power sequencing is critical.
推荐
Networking Equipment Power Management
In networking switches and routers, the UCD9090 manages power sequencing for multiple ASIC and FPGA rails. Its PMBus interface enables remote monitoring and control, while the 12-bit ADC ensures accurate voltage supervision. The device's GPIO pins can be used for reset and interrupt signals, and its PWM outputs support dynamic voltage scaling, enhancing energy efficiency in always-on infrastructure.
推荐
Telecommunications Base Station Power
The UCD9090 ensures reliable power sequencing in telecom base stations, where multiple voltage rails must be controlled precisely. Its 10-channel capability and 12-bit ADC provide accurate monitoring, while PMBus allows integration with system management. The device's wide operating temperature range and robust fault handling make it suitable for outdoor and industrial environments.
推荐
Industrial Control Systems
In industrial automation, the UCD9090 sequences and monitors power rails for PLCs, motor drives, and robotics. Its GPIO pins can be configured for enable signals and fault interrupts, while the 12-bit ADC ensures precise voltage monitoring. The device's PMBus interface allows for configuration and diagnostics, improving system reliability and reducing downtime.
推荐
Automotive Power Management
The UCD9090-Q1 variant is AEC-Q100 qualified for automotive applications, making it suitable for ADAS, infotainment, and body control modules. It sequences multiple rails in safety-critical systems, ensuring proper power-up and shutdown sequences. The 12-bit ADC and PMBus interface enable precise monitoring and diagnostics, meeting stringent automotive reliability requirements.
推荐
FPGA and ASIC Power Sequencing
FPGAs and ASICs often require multiple voltage rails with specific sequencing requirements. The UCD9090 provides up to 10 channels, each with programmable sequencing delays and slew rates. Its 12-bit ADC monitors each rail, and the PMBus interface allows for dynamic voltage scaling. This ensures reliable operation of high-performance digital logic in applications like data centers and signal processing.
推荐
推荐产品汇总
工程参考数据： UCD9090 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | UCD9090A | UCD9090QRGZRQ1 | UCD9081 |
|---|---|---|---|---|
| Package | 48-VQFN (7x7) | 48-VQFN (7x7) | 48-VQFN (7x7) | 48-VQFN (7x7) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 10 | 10 | 10 | 8 |
| ADC Resolution | 12-bit | 12-bit (improved accuracy) | 12-bit | 12-bit |
| Automotive Grade | No | No | Yes (AEC-Q100) | No |
关键差异点
- 10-channel sequencing with 12-bit ADC （对比 UCD9081)
- Automotive grade option （对比 UCD9090A)
- Enhanced version available （对比 UCD9090A)
设计说明
Ensure the V33 pin is supplied with a clean 3.3V source. Use a 100nF decoupling capacitor close to the pin and a 10uF bulk capacitor nearby. The UCD9090's internal ADC accuracy depends on a stable reference, so avoid sharing the V33 supply with noisy digital loads.
Place the UCD9090 close to the power rails it monitors to minimize trace inductance and noise pickup. Use separate analog ground and digital ground planes, connecting them at a single point. Route PMBus lines with proper termination and keep them away from high-current switching paths.
Configure the sequencing parameters and fault thresholds via PMBus before enabling the rails. Incorrect configuration can cause improper sequencing, leading to system failures. Also, ensure that the GPIO pins used for enables are not left floating; use pull-up or pull-down resistors as needed.
合规信息
RoHS and REACH compliant per TI product page. Standard version is not AEC-Q100 qualified; use UCD9090QRGZRQ1 for automotive.
