The Texas Instruments TPS51916RUKT is a power management IC tailored for DDR2, DDR3, DDR3L, and DDR4 memory systems. Housed in a compact 20-pin, 3mm×3mm QFN package, it integrates a synchronous buck controller, a 2A LDO, and a buffered reference. With an input range of 3V to 28V and an output from 0.7V to 1.8V, it suits diverse scenarios. Its 0.8% VREF precision ensures stable output. Selectable D-CAP™/D-CAP2™ modes optimize performance. Multiple protection features like OCL, OVP enhance reliability. Ideal for desktops, laptops, embedded systems, and automotive electronics, it balances efficiency and space savings.
Texas Instruments TPS51916RUKT's Features
Texas Instruments TPS51916RUKT is a power management chip used in DDR2, DDR3, DDR3L, and DDR4 memory systems. It is packaged in a 20-pin, 3mm×3mm QFN (Quad Flat No-leads) package. It integrates a synchronous buck controller, a 2A LDO (Low Dropout Regulator), and a buffered reference, and has various features as follows:
Synchronous Buck Controller (VDDQ)
- Conversion Voltage Range: The input voltage range is from 3V to 28V, which can adapt to various power supply scenarios; the output voltage range is from 0.7V to 1.8V, capable of meeting the power supply requirements of different memories.
- High-precision VREF: The VREF accuracy reaches 0.8%, providing a guarantee for the precise control of the output voltage.
- Selectable Control Architectures: It has D-CAP™ mode and D-CAP2™ mode. The D-CAP™ mode can achieve fast transient response and is suitable for situations where the output capacitor has an appropriate equivalent series resistance (ESR); the D-CAP2™ mode is specifically designed for low ESR output capacitors (such as multi-layer ceramic capacitors) and does not require a complex external compensation circuit.
- Selectable Switching Frequencies: It supports switching frequencies of 300kHz, 400kHz, 500kHz, or 670kHz. By selecting an appropriate frequency, the efficiency can be optimized under both light load and heavy load conditions. It can also balance the switching loss and filtering requirements according to the actual application needs.
- Multiple Functions and Protections: It has an automatic skip function to reduce power consumption under light load; it supports soft shutdown in S4 and S5 states, facilitating the system to enter a low-power mode; it has overcurrent (OCL), overvoltage (OVP), undervoltage (UVP), undervoltage lockout (UVLO) protection functions and a Powergood output, which can effectively ensure the stable operation of the system and provide timely feedback on the power status.
2A LDO (VTT) and Buffered Reference (VTTREF)
- Strong Current Capability: VTT has a sink and source current capability of 2A (peak), which can meet the dynamic power requirements of memory chips; VTTREF can provide an output current of 10mA, and it is buffered and has low noise.
- High-precision Output: The VTTREF accuracy is 0.8%, and the VTT accuracy is 20mV, ensuring the stability and accuracy of the output voltage and meeting the strict requirements of the memory system for power accuracy.
- Support for Multiple Operating States: It supports the high-impedance state (S3) and soft shutdown (S4, S5), facilitating power management of the system in different operating modes and reducing power consumption; it has a thermal shutdown function to prevent the chip from being damaged in case of overheating.
Other Features: It uses a 20-pin, 3mm×3mm QFN package, which is compact in size and saves circuit board space, making it suitable for application scenarios with high space requirements; it can be designed through WEBENCH, providing engineers with a convenient design tool that helps improve the design efficiency.
Texas Instruments TPS51916RUKT's Applications
The Texas Instruments TPS51916RUKT is a power management integrated circuit with specific features well-suited for certain applications, mainly centered around memory systems. Here are its common applications:
- DDR Memory Systems: As it is specifically designed for DDR2, DDR3, DDR3L, and DDR4 memory technologies, it is an essential component in systems that utilize these types of memory modules. This includes desktop computers, laptops, and servers where high-speed and reliable memory power management is crucial for overall system performance. For example, in modern gaming laptops with high-capacity DDR4 memory, the TPS51916RUKT can ensure stable power supply to the memory, enabling smooth operation of memory-intensive games and applications.
- Embedded Systems: Many embedded systems, such as industrial control systems, network routers, and set-top boxes, also incorporate DDR memory. The TPS51916RUKT can be used in these embedded devices to manage the power for the memory components. In industrial control systems, where reliability and stable operation are of utmost importance, the chip's protection features like overcurrent, overvoltage, and undervoltage protection can safeguard the memory and the overall system from electrical faults.
- High-Performance Computing (HPC): HPC systems often require large amounts of high-speed memory to handle complex calculations and data processing tasks. The TPS51916RUKT's ability to provide precise power regulation and its support for different control architectures (D-CAP™ and D-CAP2™ modes) make it suitable for powering the memory in HPC servers and workstations.
- Consumer Electronics: Devices like high-end digital cameras, video game consoles, and smart TVs that use DDR memory can benefit from the TPS51916RUKT. In a video game console, for instance, the chip can help manage the power for the memory, ensuring that the console can handle the graphics and data processing requirements of modern games without memory-related power issues.
- Automotive Electronics: In-vehicle infotainment systems, advanced driver assistance systems (ADAS), and automotive computing platforms that use DDR memory can utilize the TPS51916RUKT for power management. Its compact QFN package and ability to operate within a specific temperature range make it suitable for automotive applications where space is limited and reliability is critical.
Texas Instruments TPS51916RUKT's Attributes
| Parameter |
Value |
| Input Voltage MAX |
36 V |
| Output Voltage |
0.7 V to 1.8 V |
| Output Current |
5 uA |
| Number of Outputs |
3 |
| Maximum Operating Temperature |
+ 85 C |
| Mounting Style |
SMD/SMT |
| Package / Case |
QFN-20 |
| Packaging |
Reel |
| Series |
TPS51916 |
| Factory Pack Quantity |
250 |
Texas Instruments TPS51916RUKT's Category-Voltage Regulators
Voltage regulators play a crucial role in maintaining a stable output voltage, regardless of fluctuations in input voltage or load conditions. They ensure that power supply voltages are within the appropriate range for electrical components. There are two primary types: linear and switching regulators. Linear regulators, using active pass devices controlled by operational amplifiers, are simple, reliable, and cost-effective. They are step-down converters, offering low noise and low output voltage ripple, ideal for applications like headphones and IoT devices where noise and cost matter. However, they are inefficient with large input-output voltage differences. Switching regulators, more complex in design, can be step-down, step-up, or buck-boost converters. They are highly efficient, support higher currents, and wider voltage ranges, suitable for general applications in consumer, industrial, and automotive fields. But they are larger, costlier, and can generate noise if components aren't chosen carefully. Topologies like low-dropout (LDO) in linear regulators reduce the input-output voltage gap. And for switching regulators, step-down, step-up, and buck-boost topologies serve different voltage conversion needs.
When choosing a voltage regulator, parameters such as input voltage, output voltage, current, quiescent current, and thermal resistance are vital. Texas Instruments' TPS51916RUKT stands out. It's a high-performance switching regulator. With features like high efficiency and wide input voltage range, it's perfect for applications demanding precise voltage regulation and power management. Its advanced design ensures reliable operation, making it a top choice for engineers seeking efficient voltage regulation solutions.
TPS51916RUKT vs TPS51225CRUKR
| |
 |
 |
| Part number and picture |
TPS51916RUKT +BOM |
TPS51225CRUKR +BOM |
| Manufacturer |
TEXAS INSTRUMENTS INC |
Texas Instruments |
| Package |
20 - WQFN (3x3) |
WQFN (RUK)-20 |
| Description |
D - CAP™, D - CAP2™ Controller,
DDR Voltage Regulator IC 2 Output 20 - WQFN (3x3) |
Dual - synchronous buck controller
with VREG5 always - on LDO |
| Stock |
8244 |
3587 |
| Vin (min) (V) |
3 |
5.5 |
| Vin (max) (V) |
28 |
24 |
| Rating |
Catalog |
Catalog |
| Iq (typ) (mA) |
0.6 |
0.9 |
| Features |
Complete Solution, Eco Mode, S3/S5 Support |
Enable, Light Load Efficiency,
Power good, Synchronous Rectification |
| Operating temperature range (°C) |
-40 to 85 |
-40 to 85 |
| Vout (min) (V) |
|
4.5 |
| Vout (max) (V) |
|
5.5 |
| Maximum Continuous Drain Current (A) |
|
10 |
| Switching frequency (min) (kHz) |
|
300 |
| Switching frequency (max) (kHz) |
|
355 |
| Regulated outputs (#) |
|
2 |
| Number of phases |
|
1 |
| Control mode |
|
D - CAP |
| Manufacturer Type |
|
Controller |
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