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Texas Instruments TPS51650RSLT
- Part No.:
- TPS51650RSLT
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TPS51650RSLT.pdf
- Description:
- IC REG CTRLR IMVP-7 2OUT 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,573
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Product details
Overview
TPS51650RSLT from Texas Instruments is a dual-channel IMVP-7-compliant step-down controller integrating two gate drivers for 3-phase CPU and 2-phase GPU power stages. It delivers precise voltage positioning (0.25–1.52 V, 5-mV VID steps), supports D-CAP+™ control with OSR/USR, and operates across 3–28 V input for notebook CPU/GPU VR applications.
For engineers reviewing the TPS51650RSLT datasheet, TPS51650RSLT pinout, TPS51650RSLT application, or TPS51650RSLT equivalent, this controller enables high-efficiency, fast-transient VCORE regulation in space-constrained mobile platforms requiring SVID interface compliance, thermal monitoring, and phase balancing.
Technical Context
The TPS51650RSLT implements dual independent D-CAP+™ control loops-one for the 3-phase CPU channel and one for the 2-phase GPU channel-each supporting selectable frequency (250–600 kHz), adjustable slew rate (1.25–26 mV/µs), and 8-level current limit via external resistors. Both channels integrate digital current monitoring, IMVP-7 PGOOD/ALERT/VR_HOT signaling, and soft-start/soft-stop with dedicated SLEWA pin.
It features two integrated high-speed FET drivers (CDH1/CDL1, CDH2/CDL2) for CPU phases 1–2, while phase 3 and both GPU phases rely on external TPS51601 drivers via CPWM3, GPWM1, GPWM2, and GSKIP outputs. The controller uses separate CVFB/GVFB feedback paths, CTHERM/GTHERM thermal inputs, and COCP-R/GOCP-R pins for per-channel OCP/OSR/USR configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Dual-channel synchronous buck controller: 3-phase CPU + 2-phase GPU |
| Input Voltage Range | 3 V to 28 V - supports adapter, battery, NVDC, and 12-V rail inputs |
| Output Voltage Range | 0.25 V to 1.52 V with 5-mV VID steps - meets IMVP-7 VCORE specification |
| Control Architecture | D-CAP+™ with overlapping pulse support - reduces undershoot (USR) and overshoot (OSR) during load transients |
| Frequency Selection | 8 discrete settings per channel (250–600 kHz) - set by resistor divider on CF-IMAX/GF-IMAX pins |
| Thermal Protection | Programmable thermal shutdown (532–810 mV at CTHERM/GTHERM) - maps to 46°C–75°C junction thresholds |
| Driver Integration | Two integrated 2.2-A high-side / 6-A low-side drivers (CDH1/CDL1, CDH2/CDL2) - drives N-FETs directly for CPU phases 1–2 |
Pinout & Package
TPS51650RSLT is housed in a thermally enhanced 48-pin QFN (6 mm × 6 mm, PowerPAD™) package rated for –10°C to 105°C operation. The exposed thermal pad must be soldered to a quiet ground plane with multiple vias for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CVFB / GVFB | Voltage feedback sense input | Direct connection to CPU/GPU VCORE; enables closed-loop regulation and soft-stop transistor discharge |
| CCSP1–3 / CCSN1–3 / GCSP1–2 / GCSN1–2 | Current sense inputs | Support DCR or resistor-based phase current sensing; CCSP1 tie to V3R3 disables CPU phase 3 |
| CDH1/CDL1 / CDH2/CDL2 | Integrated gate drive outputs | Drive high-side/low-side N-FETs for CPU phases 1 and 2; 2.2-A sink/source capability |
| CPWM3 / GPWM1/GPWM2 / GSKIP | External driver control outputs | 5-V logic-level PWM/SKIP signals for TPS51601-driven CPU phase 3 and GPU phases |
| COCP-R / GOCP-R | OCP/USR/OSR configuration input | Resistor-to-GND sets per-channel overcurrent threshold (4.6–49 mV) and transient response level |
| CTHERM / GTHERM | Thermal sensor interface | NTC thermistor divider input; triggers VR_HOT/ALERT when voltage drops below programmable threshold |
Key Features
| Feature | Design Value |
|---|---|
| IMVP-7 SVID Compliance | Fully integrated Serial VID interface with VR_ON enable, ALERT interrupt, and VR_HOT thermal flag - eliminates need for external SVID translator |
| AutoBalance™ Phase Balancing | Internal current share tolerance ±3% between phases - ensures uniform current distribution without external balancer ICs |
| Dual Independent Droop Control | Separate CCOMP/GCOMP amplifier outputs with resistor-set transconductance (486–518 µS) - enables precise voltage positioning per channel |
| Selectable Light-Load Mode | Supports PS0 (full-phase), PS1 (reduced-phase), and PS3 (single-phase) states - improves efficiency at <10% load |
| Programmable Slew Rate | 7-step SLEWA-resistor setting (1.25–26 mV/µs) - controls VCORE ramp time during VID changes and startup/soft-stop |
Applications
| Mobile Notebook CPU Power | Gaming Laptop GPU Power |
|---|---|
|
Use Scenario: High-performance ultrabook with Intel Core i7 processor requiring dynamic VCORE scaling under varying workloads. IC Role / Device Role / Timing Role: Primary IMVP-7 VCORE controller managing 3-phase buck conversion, SVID communication, and thermal throttling. Use Value: Delivers 94-A peak output with <±15 mV load regulation and sub-10 µs VID response - meeting Intel's PS0–PS3 transition timing requirements. |
Use Scenario: Dual-GPU gaming laptop where discrete NVIDIA GPU demands tightly regulated VGFX supply during graphics-intensive rendering. IC Role / Device Role / Timing Role: Secondary 2-phase IMVP-7-compliant controller coordinating with CPU channel via shared SVID bus and thermal alerts. Use Value: Achieves 46-A GPU output with 85–95% efficiency across 2–20 A loads and <37-A transient recovery in <10 µs - sustaining stable frame rates. |
| Adapter/Battery Hybrid Power | Thermally Constrained Tablet Platform |
|
Use Scenario: Convertible 2-in-1 device switching between 12-V AC adapter and 3-cell Li-ion battery input rails. IC Role / Device Role / Timing Role: Input-flexible VR controller accepting 3–28 V input while maintaining IMVP-7 compliance and dynamic voltage positioning. Use Value: Maintains <±0.5% output accuracy across full input range and supports seamless VR_ON-controlled transitions between power sources. |
Use Scenario: Fanless tablet with limited PCB area and no active cooling, requiring low-thermal-footprint power delivery. IC Role / Device Role / Timing Role: Compact dual-channel controller in 6×6 mm QFN with integrated drivers - reduces external component count by 4 MOSFET drivers. Use Value: Enables 2.1°C/W bottom-side thermal resistance (θJCbot) and 7.1°C/W board thermal coupling - critical for passive thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel IMVP-7 VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS59650RSLT | Wider operating temperature range (–40°C to 105°C) and selectable SVID base address; identical pinout and electrical specs. | Suitable for extended-temperature industrial or automotive infotainment systems where cold-start reliability is required. | Choose TPS59650RSLT when ambient operating temperature may fall below –10°C or SVID address conflict mitigation is needed. |
| ISL95831IRZ | Single-chip 3+2-phase controller with integrated drivers; supports Intel VR12.5/VR12.6; lacks D-CAP+™ but offers adaptive on-time control. | Targets newer platform generations requiring VR12.6 compliance and higher light-load efficiency at 1-V I/O. | Choose ISL95831IRZ only for VR12.6-compliant designs; not drop-in compatible due to different SVID protocol and pin mapping. |
Compared with TPS59650RSLT, the TPS51650RSLT offers lower-cost thermal qualification for consumer notebooks, while ISL95831IRZ provides next-gen VR protocol support at the expense of IMVP-7-specific features like USR/OSR and AutoBalance™.
Availability
TPS51650RSLT is available at Aetrix Electronics and suitable for mobile computing, gaming laptop power delivery, and thermally constrained embedded systems requiring stable component supply and long-term design continuity.
Supply support for TPS51650RSLT 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 leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in power conversion ICs.
The TPS51650RSLT belongs to TI's IMVP-7 VR controller product line, engineered specifically for high-efficiency, fast-transient VCORE regulation in Intel-based mobile platforms with integrated CPU/GPU power stages.
FAQ
What is the maximum supported output current for the CPU channel of the TPS51650RSLT?
The TPS51650RSLT supports up to 94 A peak output current in its 3-phase CPU configuration, as validated in TI's SLUSAV7 datasheet Figure 1–4 under 9-V and 20-V input conditions. This rating assumes proper layout, thermal management, and use of recommended external FETs and inductors per TI's reference design.
Does the TPS51650RSLT require external gate drivers for all phases?
No - the TPS51650RSLT integrates two high-current gate drivers (CDH1/CDL1 and CDH2/CDL2) for CPU phases 1 and 2. CPU phase 3 and both GPU phases require external drivers such as the TPS51601, controlled via CPWM3, GPWM1, GPWM2, and GSKIP outputs on the TPS51650RSLT.
How does the TPS51650RSLT implement voltage positioning (VP) for IMVP-7 compliance?
The TPS51650RSLT implements voltage positioning using its internal droop amplifiers (CCOMP/GCOMP), where a resistor from CCOMP to VREF sets the transconductance (486–518 µS). This creates a controlled voltage drop proportional to load current, ensuring VCORE scales downward under load per IMVP-7 VP specification - verified in datasheet Figures 1–4 and electrical table GM-DROOP parameter.
Can the TPS51650RSLT operate with a 3.3-V-only supply, or does it require 5-V bias?
The TPS51650RSLT requires both V5 (5-V analog supply, pin 48) and V3R3 (3.3-V I/O supply, pin 15); it cannot operate on 3.3 V alone. V5 powers internal analog circuits and gate drivers (via V5DRV, pin 43), while V3R3 supplies SVID interface logic. Both rails must be present and within their respective recommended ranges (V5: 4.5–5.5 V; V3R3: 3.1–3.5 V).
What thermal protection mechanisms are built into the TPS51650RSLT?
The TPS51650RSLT features dual independent thermal monitoring via CTHERM and GTHERM pins, each interfacing with an NTC thermistor divider. When voltage at either pin falls below a programmable threshold (532–810 mV), the device asserts VR_HOT (CPU) or ALERT (GPU) and can trigger thermal shutdown at 155°C junction temperature, with 20°C hysteresis for recovery.
TPS51650RSLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP+™
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel IMVP-7
- Voltage - Input:
- 3V ~ 28V
- Number of Outputs:
- 2
- Voltage - Output:
- 0.25V ~ 1.52V
- Operating Temperature:
- -10°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-VQFN (6x6)
TPS51650RSLT FAQ
1.How can I place an order for TPS51650RSLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS51650RSLT 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 TPS51650RSLT reliable?
The price and inventory of TPS51650RSLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS51650RSLT is usually 5 days.
3.What payment methods are accepted for TPS51650RSLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS51650RSLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS51650RSLT?
TPS51650RSLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS51650RSLT 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 TPS51650RSLT?
For technical support, including TPS51650RSLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS51650RSLT requirements.
6.How does Aetrix verify that TPS51650RSLT is sourced from the original manufacturer or authorized distributors?
All TPS51650RSLT 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 TPS51650RSLT meets industry standards.
7.What is the process for return or replacement of TPS51650RSLT?
All TPS51650RSLT units undergo pre-shipment inspection (PSI). If there is an issue with TPS51650RSLT, 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 TPS51650RSLT part is unused and in its original packaging.
Return procedure for TPS51650RSLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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