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Texas Instruments UCD9244RGCT
- Part No.:
- UCD9244RGCT
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
UCD9244RGCT.pdf
- Description:
- IC DGTL PWM SYSTEM CTRLR 64VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,806
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Product details
Overview
UCD9244RGCT from Texas Instruments is a four-rail synchronous buck digital PWM controller for non-isolated DC/DC power applications, integrating dedicated loop management, 4-bit/6-bit/8-bit VID interface support, hardware-accelerated 3-pole/3-zero compensator, and 12-bit digital monitoring of voltage, current, and temperature per rail. It delivers up to 2 MHz switching frequency with 250 ps duty-cycle resolution and supports prebias start-up and voltage margining in FPGA/DSP power systems.
For engineers reviewing the UCD9244RGCT datasheet, UCD9244RGCT pinout, UCD9244RGCT application, or UCD9244RGCT equivalent, this page provides verified technical context on its four independent DPWM outputs, PMBus 1.2 compliance, VID-configurable reference setpoints, real-time fault response (as low as 100 µs for over-current), and QFN-64 package integration with analog/digital ground separation.
Technical Context
The UCD9244RGCT implements four independent Fusion Power Peripherals (FPPs), each with a differential error amplifier, 10-bit DAC reference, fast ADC, programmable 3-pole/3-zero digital filter, and high-resolution DPWM engine. Each FPP operates autonomously with configurable soft-start, sequencing, and closed-loop regulation.
It supports three VID modes (4-/6-/8-bit) via dedicated parallel pins or PMBus, enabling dynamic voltage scaling from TMS320C6670/C6678 DSPs and other VID-enabled devices. Fault detection uses both hardware comparators (4 µs analog over-current response) and ADC-based monitoring (200 µs voltage fault latency), with ECC-protected flash storing configuration and calibration data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Outputs | Four independent synchronous buck DPWM outputs (DPWM1A–DPWM4A) with 250 ps resolution and 0–100% duty cycle control. |
| Switching Frequency | Up to 2 MHz - enables compact magnetics and high-density power delivery for telecom and networking equipment. |
| Closed-Loop Resolution | 1 mV - achieved via 12-bit ADC and digital compensator, supporting tight regulation for FPGA core rails. |
| VID Interface | Configurable 4-bit, 6-bit, or 8-bit parallel/serial VID input per rail - allows dynamic voltage scaling from DSPs, ASICs, or PMBus masters. |
| Fault Response Time | As low as 4 µs (analog comparator over-current) and 100 µs (digital over-current) - ensures rapid shutdown before MOSFET thermal runaway. |
| Monitoring Accuracy | ±10 mV setpoint accuracy at 25°C; ±20 mV over –40°C to 125°C - enables reliable margining and telemetry in industrial environments. |
| PMBus Compliance | PMBus 1.2 compliant with 100 kHz–1 MHz operation, ALERT signal, and MFR_SPECIFIC commands - integrates into standard power management ecosystems. |
Pinout & Package
The UCD9244RGCT is housed in a thermally enhanced 64-pin QFN package (9 mm × 9 mm, 0.5 mm pitch) with exposed PowerPad connected to analog ground. Pin assignment separates analog (Agnd1–Agnd3, EAp/EAn, CSxA, Tempx) and digital (Dgnd1–Dgnd3, VIDx, DPWMx, PMBus) domains to minimize noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DPWM1A–DPWM4A | Digital PWM output stage drivers | High-resolution (250 ps) pulse-width modulated signals controlling external gate drivers for four independent buck stages. |
| EAp1/EAn1–EAp4/EAn4 | Differential voltage feedback inputs | Matched-pair analog inputs per rail for precision error amplification; require Kelvin-sense routing to avoid PCB trace IR drop errors. |
| CS1A–CS4A | Analog current sense inputs | Direct connection to current-sense resistor outputs; feed internal analog comparators (4 µs response) and 12-bit ADC for digital current monitoring. |
| VID1A–VID4S | Parallel VID data/select lines | Configurable per-rail 4-/6-bit VID interface; supports simultaneous voltage commands from multiple DSPs without PMBus arbitration. |
| PMBus_Clk / PMBus_Data | PMBus 1.2 serial interface | Standard SMBus-compatible bus (100–1000 kHz) for configuration, telemetry, fault logging, and firmware updates. |
| FLT1A–FLT4A | Open-drain fault indicator outputs | Per-rail active-low signals indicating over-voltage, over-current, or over-temperature - drive external OR-ing logic or system-level fault latches. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-accelerated 3P3Z compensator | Enables stable loop response across wide load/transient conditions without external compensation components or tuning effort. |
| Prebias start-up capability | Allows safe ramp-up of output voltage even when output capacitor is precharged - critical for hot-swap and multi-rail sequencing. |
| Voltage margining & sequencing | Supports precise ±5% output adjustment and programmable power-on/off timing between rails - essential for FPGA I/O and core supply coordination. |
| Enhanced nonvolatile memory with ECC | Stores full configuration, calibration, and fault logs with error correction - ensures reliability over 100 years of data retention at 25°C. |
| SyncIn pin for multi-device clock alignment | Enables deterministic phase alignment of DPWM clocks across multiple UCD92xx controllers - reduces input ripple in multi-phase systems. |
Applications
| Telecom Line Card Power | FPGA Core & I/O Supply |
|---|---|
|
Use Scenario: Regulating multiple voltage rails (e.g., 1.2 V core, 2.5 V I/O, 3.3 V auxiliary) on a high-port-density line card with strict transient response and sequencing requirements. IC Role / Device Role / Timing Role: Four-rail digital PWM controller managing independent buck stages, coordinating soft-start, margining, and fault reporting via PMBus. Use Value: Eliminates discrete compensation networks and sequencing ICs; achieves <200 µs voltage fault response and <1 mV regulation drift over temperature. |
Use Scenario: Powering Xilinx or Intel FPGA banks requiring tightly coupled core (0.85 V) and I/O (1.8 V, 3.3 V) supplies with dynamic VID updates during configuration. IC Role / Device Role / Timing Role: VID-responsive digital controller accepting real-time voltage commands from FPGA JTAG or configuration bus while maintaining closed-loop stability. Use Value: Enables adaptive voltage scaling during partial reconfiguration; supports 4-bit VID updates with <600 µs latency and seamless prebias start-up. |
| DSP-Based Signal Processing System | High-Density Networking Switch ASIC |
|
Use Scenario: Supplying TMS320C6670/C6678 DSPs with dynamically scaled core, memory, and I/O voltages synchronized to processing workload. IC Role / Device Role / Timing Role: Dual-role controller: accepts 6-bit parallel VID from DSPs and executes PMBus-based telemetry and fault logging to host processor. Use Value: Reduces BOM count by integrating four independent regulators; achieves 1 mV closed-loop resolution and <100 µs over-current shutdown. |
Use Scenario: Managing 12+ voltage domains on a 100G switch ASIC card where space, thermal density, and power sequencing integrity are critical. IC Role / Device Role / Timing Role: Primary digital power controller coordinating with companion UCD7242 gate drivers; uses SyncIn to align DPWM phases across multiple UCD9244s. Use Value: Enables deterministic multi-controller synchronization, reducing input capacitor RMS current by >30%; supports 2 MHz operation for smallest possible inductors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital multi-rail PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCD9246RGCT | 6-output variant with identical feature set, package, and pinout - adds two extra DPWM channels and associated analog front-end resources. | Suitable for systems requiring >4 regulated rails without stacking controllers; shares same Fusion Digital Power Designer toolchain and PMBus command structure. | Select UCD9246RGCT when expanding rail count beyond four while retaining layout compatibility and firmware reuse. |
| LM25069GSDX/NOPB | Single-channel hot-swap controller with integrated MOSFET driver and PMBus telemetry - lacks multi-rail coordination, VID interface, or digital compensator. | Targets point-of-load protection only; cannot replace UCD9244RGCT's four-rail regulation, sequencing, or DSP interface capabilities. | Use LM25069GSDX/NOPB only for standalone input-stage current limiting - not as a functional alternative for UCD9244RGCT's system-level power management role. |
Compared with UCD9244RGCT, UCD9246RGCT offers direct scalability to six rails with identical architecture and tool support, whereas LM25069GSDX/NOPB serves a fundamentally different protection-only function and cannot replicate VID-driven dynamic voltage control or multi-rail closed-loop regulation.
Availability
UCD9244RGCT is available at Aetrix Electronics and suitable for telecom line cards, FPGA power systems, DSP-based signal processors, and high-density networking switches requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for UCD9244RGCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with leadership in high-reliability industrial and communications ICs.
The UCD9244RGCT belongs to TI's Fusion Digital Power™ controller family, designed specifically for digitally managed, multi-rail DC/DC conversion in FPGA, DSP, and ASIC power systems demanding precision, configurability, and fault resilience.
FAQ
What is the maximum switching frequency supported by the UCD9244RGCT?
The UCD9244RGCT supports switching frequencies up to 2 MHz, enabling high-efficiency, compact power designs with reduced passive component size. This capability is confirmed in the Electrical Characteristics table (FSW parameter) and applies across the full operating temperature range of –40°C to 125°C. The UCD9244RGCT maintains 250 ps duty-cycle resolution even at 2 MHz, ensuring precise control during fast transients.
Does the UCD9244RGCT support prebias start-up, and how is it configured?
Yes, the UCD9244RGCT supports prebias start-up, allowing safe output voltage ramping when the output capacitor is already charged. This is enabled via the STARTUP_CONFIG PMBus command and requires no external circuitry. The UCD9244RGCT monitors the output voltage during soft-start initiation and adjusts PWM behavior to avoid reverse current flow - a key requirement for hot-swap and redundant power systems using the UCD9244RGCT.
How many VID interface modes does the UCD9244RGCT support, and what are their pin assignments?
The UCD9244RGCT supports three VID interface modes: 4-bit, 6-bit, and 8-bit. In 4-/6-bit mode, each rail uses four dedicated pins (e.g., VID1A, VID1B, VID1C, VID1S for Rail 1); in 8-bit mode, VID commands are received via the PMBus interface. Pin assignments are fixed per rail and documented in Table 1 of the UCD9244RGCT datasheet - VID4A/JTAG_TCK, VID4B/JTAG_TDO, VID4C/JTAG_TMS, and VID4S are the four pins for Rail 4.
What fault protection features are implemented in hardware versus firmware in the UCD9244RGCT?
The UCD9244RGCT implements over-current protection in hardware via analog comparators (4 µs response time on CSxA inputs), while over-voltage, under-voltage, and over-temperature faults use ADC-based monitoring (200 µs–1.6 s latency). Hardware faults trigger immediate DPWM disable; firmware-managed faults allow configurable response (e.g., retry, latch-off) via FAULT_RESPONSE settings. Both paths are active simultaneously in the UCD9244RGCT.
Is the UCD9244RGCT pin-compatible with other devices in the UCD92xx family?
The UCD9244RGCT is pin-compatible with UCD9246RGCT (6-output variant) in the same QFN-64 package - sharing identical pin functions for the first four DPWM, VID, and monitoring channels. However, UCD9244RGCT is not pin-compatible with UCD9222 or UCD9224, which use smaller packages and fewer peripherals. Layout reuse is possible only between UCD9244RGCT and UCD9246RGCT.
UCD9244RGCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- PWM Controller
- Current - Supply:
- 8mA
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-VQFN (9x9)
UCD9244RGCT FAQ
1.How can I place an order for UCD9244RGCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCD9244RGCT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UCD9244RGCT reliable?
The price and inventory of UCD9244RGCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCD9244RGCT is usually 5 days.
3.What payment methods are accepted for UCD9244RGCT?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCD9244RGCT?
UCD9244RGCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCD9244RGCT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UCD9244RGCT?
For technical support, including UCD9244RGCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCD9244RGCT requirements.
6.How does Aetrix verify that UCD9244RGCT is sourced from the original manufacturer or authorized distributors?
All UCD9244RGCT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UCD9244RGCT meets industry standards.
7.What is the process for return or replacement of UCD9244RGCT?
All UCD9244RGCT units undergo pre-shipment inspection (PSI). If there is an issue with UCD9244RGCT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UCD9244RGCT part is unused and in its original packaging.
Return procedure for UCD9244RGCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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