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Texas Instruments TPS53659RSBT
- Part No.:
- TPS53659RSBT
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
TPS53659RSBT.pdf
- Description:
- IC REG CTRLR VR13 2OUT 40WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:930
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Product details
Overview
TPS53659RSBT from Texas Instruments is a dual-channel, VR13-compliant multiphase step-down controller supporting 4+1 or 3+2 phase configurations, with integrated NVM, PMBus™ telemetry, and D-CAP+™ architecture for server memory power delivery. It delivers 0.25–1.52 V or 0.5–2.8125 V output per channel, operates from 4.5–17 V input, and features dynamic phase shedding, AutoBalance™ current sharing, and 300 kHz–1 MHz programmable switching frequency.
For engineers reviewing the TPS53659RSBT datasheet, TPS53659RSBT pinout, TPS53659RSBT application, or TPS53659RSBT equivalent, key selection criteria include VR13 SVID compliance, dual-rail programmability via PMBus, per-phase current reporting, closed-loop frequency control, and thermal performance in 5 mm × 5 mm WQFN packages rated for –40°C to 125°C operation.
Technical Context
The TPS53659RSBT implements D-CAP+™ control with undershoot reduction (USR) and closed-loop frequency regulation, enabling fast transient response and stable operation across load steps without external compensation components. Its dual-channel architecture supports independent voltage positioning, slew-rate-controlled dynamic transitions, and programmable loop compensation stored in on-chip NVM.
Phase management includes AutoBalance™ real-time current balancing, dynamic phase shedding with 16-level per-phase current limits, and fast phase-adding logic to minimize output voltage undershoot. The device communicates via PMBus v1.3 for telemetry of voltage, current, power, temperature, and fault status, and is fully backward-compatible with VR12.0/VR12.5 SVID protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Dual-channel multiphase buck controller (configurable as 4+1 or 3+2 phases) |
| Input Voltage Range | 4.5 V to 17 V - supports standard 12 V server rails and wide-input industrial supplies |
| Output Voltage Range | 0.25–1.52 V or 0.5–2.8125 V per channel - covers VR13 memory core and I/O rail requirements |
| Switching Frequency | 300 kHz to 1 MHz with closed-loop control - enables optimization of efficiency vs. size using discrete or integrated NexFET™ power stages |
| PMBus Interface | Compliant with PMBus v1.3 - provides real-time telemetry and configuration of all critical parameters including VCORE slew rate and voltage positioning |
| Operating Temperature | –40°C to 125°C ambient - qualified for high-density server board environments with localized hot spots |
| Package | 40-pin WQFN (RSB), 5 mm × 5 mm, PowerPad™ thermal pad - enables high-power dissipation with minimal PCB area |
Pinout & Package
TPS53659RSBT is housed in a thermally enhanced 40-pin WQFN (RSB) package with an exposed PowerPad™ thermal pad requiring solder connection to PCB ground plane for optimal thermal and mechanical performance. Pin 1 is located in Quadrant Q2 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power input | Accepts 4.5–17 V supply; decoupling required near pin for high-frequency stability |
| VDDIO | I/O supply | Provides 3.3 V bias for PMBus/SVID interface; must be independently filtered |
| VREF | Reference voltage output | Internal 1.0 V reference for ADC calibration and DAC accuracy; requires 1 µF ceramic bypass |
| SVID_DATA / SVID_CLK | Intel SVID bus interface | Supports VR13/VR12.5 host communication; bidirectional, open-drain, 3.3 V tolerant |
| PMBUS_SDA / PMBUS_SCL | PMBus interface | Standard I²C-compatible telemetry interface; pull-up resistors required externally |
| PHASEx | Phase driver outputs (x = 1–5) | Five high-speed gate drive outputs supporting TI NexFET™ power stages; each configurable per channel |
| ISENx | Per-phase current sense inputs | Differential inputs for RDS(on) or shunt-based current monitoring; enables individual phase calibration |
| THERM | Die temperature monitor | Analog output proportional to junction temperature; used for thermal throttling and fault reporting |
Key Features
| Feature | Design Value |
|---|---|
| VR13 SVID compliance with digital input power monitor | Enables full Intel server memory power specification support including real-time input power calculation and reporting |
| Non-volatile memory (NVM) configuration storage | Eliminates need for external EEPROM or configuration resistors; stores default settings for voltage, frequency, and protection thresholds |
| Dynamic phase shedding with 16-level per-phase current limit | Optimizes conversion efficiency across 10%–100% load range by automatically disabling underutilized phases while maintaining current balance |
| AutoBalance™ phase current balancing | Compensates for MOSFET RDS(on) mismatch and layout asymmetry in real time, reducing thermal stress and improving reliability |
| Programmable VCORE slew rate via SVID/PMBus | Prevents overshoot/undershoot during dynamic voltage transitions required by DDR4/LPDDR4 memory training sequences |
| Driverless high-frequency operation | Reduces component count and board space by integrating gate drivers capable of >1 MHz switching with TI NexFET™ power stages |
Applications
| VR13 Server Memory Power | ASIC Dual-Rail Power Delivery |
|---|---|
|
Use Scenario: Powering DDR4/LPDDR4 memory subsystems in rack-scale servers where tight voltage regulation and dynamic scaling are mandated by JEDEC specifications. IC Role / Device Role / Timing Role: Primary VR13-compliant multiphase controller managing two independent output rails (VDDQ and VPP) with synchronized SVID commands and PMBus telemetry. Use Value: Delivers ±0.5% output accuracy over line/load/temperature, supports 10–90% VCORE slew rates down to 2.5 mV/µs, and reports per-phase current for thermal-aware system management. |
Use Scenario: Supplying matched but independently regulated core and I/O voltages to high-performance ASICs in telecom baseband processing units. IC Role / Device Role / Timing Role: Dual-channel controller delivering tightly coupled yet separately programmable rails with coordinated startup sequencing and fault isolation. Use Value: Enables independent voltage positioning per rail, dynamic phase shedding on each channel, and simultaneous PMBus readback of voltage, current, and temperature for predictive maintenance. |
| High-Density Compute Module Power | Cloud Data Center VR12.x Legacy Support |
|
Use Scenario: Compact 1U server modules where board area is constrained and thermal density exceeds 3 W/cm² near memory controllers. IC Role / Device Role / Timing Role: High-efficiency multiphase controller operating at 800 kHz with integrated PowerPad™ thermal pad and driverless NexFET™ compatibility. Use Value: Achieves >90% peak efficiency at 40 A per channel, reduces external component count by 30% via NVM storage, and maintains <±2% current imbalance across five phases. |
Use Scenario: Upgrading legacy VR12.0/VR12.5 server platforms to support newer memory while retaining existing motherboard firmware and SVID host controllers. IC Role / Device Role / Timing Role: Drop-in compatible controller providing identical SVID command set, timing behavior, and fault response as prior-generation VR12 parts. Use Value: Eliminates firmware updates or hardware redesign; supports same boot sequence, voltage transition profiles, and thermal throttling logic as VR12.5 implementations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase VR controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS53679RSBT | Single-channel, 6-phase VR13 controller with identical NVM, PMBus, and D-CAP+™ features; lacks second independent rail | Best suited for single-rail high-current applications (e.g., CPU core power), not dual-rail memory systems | Select TPS53679RSBT only when one output rail suffices and phase count >5 is required; TPS53659RSBT remains mandatory for VR13 dual-rail compliance. |
| ISL6381IRZ-T | VR12.5 dual-channel controller with PMBus v1.2, no NVM, fixed 600 kHz frequency, and no dynamic phase shedding | Supports legacy server platforms but cannot meet VR13 input power monitoring or programmable slew rate requirements | Choose ISL6381IRZ-T only for cost-sensitive VR12.5 upgrades where VR13 features are unused; TPS53659RSBT is required for full VR13 certification. |
Compared with TPS53679RSBT and ISL6381IRZ-T, the TPS53659RSBT uniquely satisfies dual-rail VR13 compliance with NVM-based configuration, dynamic phase shedding, and programmable slew rates-making it irreplaceable for new DDR4/LPDDR4 memory power designs requiring full specification adherence.
Availability
TPS53659RSBT is available at Aetrix Electronics and suitable for VR13 server memory power, ASIC dual-rail power delivery, and high-density compute module applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS53659RSBT 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 decades of expertise in server-grade power delivery ICs.
The TPS53659RSBT belongs to TI's VR13-compliant multiphase controller product line, engineered specifically for high-efficiency, digitally programmable memory power in cloud data centers and enterprise networking equipment.
FAQ
What is the primary function of the TPS53659RSBT in server power systems?
The TPS53659RSBT serves as a dual-channel, VR13-compliant multiphase step-down controller that regulates two independent output rails for DDR4/LPDDR4 memory subsystems. It manages up to five total phases (4+1 or 3+2), executes SVID commands from the memory controller, and reports real-time telemetry via PMBus. Its D-CAP+™ architecture ensures fast transient response essential for memory voltage stability during burst access patterns.
Does the TPS53659RSBT require external compensation components?
No, the TPS53659RSBT does not require external compensation components due to its integrated D-CAP+™ control architecture and programmable loop compensation stored in on-chip non-volatile memory (NVM). All compensation settings-including gain, zero, and pole locations-are configured via PMBus or SVID and retained after power cycle, eliminating the need for external RC networks typically required in voltage-mode or current-mode controllers.
How does the TPS53659RSBT support thermal management in high-density server boards?
The TPS53659RSBT supports thermal management through its integrated die temperature sensor (THERM pin), per-phase current reporting via ISENx inputs, and AutoBalance™ real-time current redistribution. These features feed into system-level thermal algorithms, allowing dynamic phase shedding or clock gating based on measured junction temperature and individual phase loading-critical for maintaining reliability in compact 1U server modules with limited airflow.
Can the TPS53659RSBT operate with TI NexFET™ power stages?
Yes, the TPS53659RSBT is fully compatible with TI NexFET™ power stages, as explicitly stated in its datasheet. Its driverless configuration supports high-frequency switching (>1 MHz) directly into NexFET™ integrated driver-MOSFET modules, minimizing gate drive losses and simplifying layout. This co-design enables high-efficiency, high-density solutions meeting VR13 power delivery requirements without external gate drivers.
What packaging and thermal characteristics define the TPS53659RSBT?
The TPS53659RSBT uses a 40-pin WQFN (RSB) package measuring 5 mm × 5 mm with a maximum height of 0.8 mm and an exposed PowerPad™ thermal pad. It is rated for operation from –40°C to 125°C ambient temperature. The PowerPad™ must be soldered to a dedicated PCB thermal plane to achieve specified thermal resistance (θJA ≈ 28°C/W) and sustain continuous 40 A per channel output capability.
TPS53659RSBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP+™
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel VR13
- Voltage - Input:
- 4.5V ~ 17V
- Number of Outputs:
- 2
- Voltage - Output:
- 0.25V ~ 1.52V, 0.5V ~ 2.8125V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-WQFN (5x5)
TPS53659RSBT FAQ
1.How can I place an order for TPS53659RSBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS53659RSBT 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 TPS53659RSBT reliable?
The price and inventory of TPS53659RSBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS53659RSBT is usually 5 days.
3.What payment methods are accepted for TPS53659RSBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS53659RSBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS53659RSBT?
TPS53659RSBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS53659RSBT 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 TPS53659RSBT?
For technical support, including TPS53659RSBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS53659RSBT requirements.
6.How does Aetrix verify that TPS53659RSBT is sourced from the original manufacturer or authorized distributors?
All TPS53659RSBT 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 TPS53659RSBT meets industry standards.
7.What is the process for return or replacement of TPS53659RSBT?
All TPS53659RSBT units undergo pre-shipment inspection (PSI). If there is an issue with TPS53659RSBT, 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 TPS53659RSBT part is unused and in its original packaging.
Return procedure for TPS53659RSBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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