My Inquiry
My Account
Texas Instruments TPS53511RGTT
- Part No.:
- TPS53511RGTT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS53511RGTT.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:851
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS53511RGTT from Texas Instruments is a 1.5-A synchronous step-down DC-DC converter with integrated high-side and low-side N-channel MOSFETs, operating from 4.5 V to 18 V input and delivering adjustable output down to 2 V. It employs D-CAP2™ adaptive on-time control for fast transient response, supports all-MLCC output configurations, and delivers 700-kHz switching in a 3-mm × 3-mm QFN-16 package - used in server point-of-load regulation.
For engineers reviewing the TPS53511RGTT datasheet, TPS53511RGTT pinout, TPS53511RGTT application, or TPS53511RGTT equivalent, key selection criteria include its 1.5-A continuous output, D-CAP2™ mode enabling zero-external-compensation design, integrated power-good signaling, pre-biased soft-start capability, and thermal shutdown at 150°C.
Technical Context
The TPS53511RGTT implements adaptive on-time D-CAP2™ control without an external oscillator: on-time is set by VIN and VOUT to maintain pseudo-fixed 700-kHz operation, while off-time ends when VFB falls below the 0.765-V reference. Its proprietary ripple-simulation circuit enables stable regulation with ultra-low-ESR ceramic capacitors.
Functional modes include PWM under heavy load and Auto-Skip mode at light load, with seamless transition between them. Protection features are cycle-by-cycle overcurrent limiting using RDS(on) sensing, ±15% OVP/UVP latching shutdown, non-latching UVLO (3.8 V threshold), and thermal shutdown at 150°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 1.5 A continuous - supports POL loads in computing systems without external current-sense resistors |
| Input voltage range | 4.5 V to 18 V - compatible with 5 V, 12 V, and 15 V intermediate bus rails |
| Output voltage range | 2 V to 18 V - adjustable via external resistor divider on VFB pin |
| Switching frequency | 700 kHz nominal - enables compact magnetics and reduces EMI filtering burden |
| Control architecture | D-CAP2™ adaptive on-time - eliminates need for external compensation network |
| Shutdown current | <10 µA - minimizes standby power loss in always-on subsystems |
| Power-good signal | Open-drain PG with ±10% window and 10-µs fault delay - enables reliable system sequencing |
| Operating temperature | –40°C to +85°C ambient - qualified for industrial and enterprise server environments |
Pinout & Package
TPS53511RGTT is housed in a thermally enhanced 3.00 mm × 3.00 mm, 16-pin QFN package (RGT) with exposed PowerPAD™ soldered to PGND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 13,14) | Power input | High-side FET drain connection; must be decoupled locally with ≥10 µF ceramic capacitor |
| SW (Pins 9,10,11) | Switch node | Connection point between high- and low-side FETs; critical for layout integrity and EMI control |
| PGND (Pins 7,8) | Power ground | Low-side FET source return and current-sense reference; requires low-inductance tie to PowerPAD™ |
| GND (Pin 4) | Signal ground | Analog reference for feedback and control circuits; must be connected to PGND near device |
| VFB (Pin 1) | Feedback input | Monitors output via resistor divider; sets regulated voltage with 0.765-V internal reference |
| EN (Pin 6) | Enable input | Active-high logic control (1.5 V threshold); initiates soft-start and disables all switching when low |
| PG (Pin 5) | Power-good output | Open-drain status flag indicating VOUT within ±10% of target after 1.7× soft-start time |
| SS (Pin 3) | Soft-start control | Capacitor-connected node; sets ramp time (tSS ≈ 0.765 × CSS / 2 µA) and enables pre-biased startup |
| VO (Pin 16) | Output voltage sense | Direct connection to output rail; used internally for on-time adjustment and discharge control |
| VBST (Pin 12) | Bootstrap supply | Drives high-side gate; requires 0.1-µF ceramic capacitor from VBST to SW |
| VREG5 (Pin 2) | 5.5-V LDO output | Powers internal circuitry; supplies external bias if needed; rated for 70 mA max |
| VCC (Pin 15) | Bias supply input | Accepts 4.5–18 V; powers control logic and gate drivers; bypass with 1-µF ceramic |
| PowerPAD™ | Thermal pad | Must be soldered to PGND plane; accounts for >80% of heat dissipation (θJCbot = 3.9°C/W) |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ control mode | Enables stable regulation with ceramic output capacitors only - no external compensation required |
| Pre-biased soft-start | Prevents reverse current flow during startup into pre-charged outputs - avoids output voltage droop or overshoot |
| Integrated power-good | Provides sequenced system enable with ±10% accuracy and 10-µs fault response - eliminates need for external supervisor IC |
| Auto-Skip light-load mode | Reduces switching losses at <300 mA load - maintains >80% efficiency down to 1 mA output current |
| Internal MOSFET RDS(on) sensing | Eliminates external current-sense resistor - achieves cycle-by-cycle overcurrent protection with 120 mΩ/70 mΩ FETs |
| Output discharge function | Activates internal 50-Ω VO-to-PGND switch when disabled - ensures rapid, controlled output discharge |
Applications
| Server Point-of-Load Regulation | Distributed Computing Power |
|---|---|
Use Scenario: Regulating 1.05 V at 1.5 A for CPU core or memory I/O supply in rack-mounted servers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated POL voltage with fast load-step response. Use Value: D-CAP2™ control achieves <50-µs recovery from 0→1.5 A transient while maintaining <15-mV undershoot - meets server VR14 requirements. | Use Scenario: Providing isolated 1.2 V, 1.5 V, or 1.8 V rails to FPGA, ASIC, or GPU subsystems in modular compute blades. IC Role / Device Role / Timing Role: Compact, self-contained DC-DC converter enabling board-level power distribution without discrete controllers or drivers. Use Value: 3-mm × 3-mm QFN package and all-MLCC support reduce solution footprint by >40% vs. controller+MOSFET alternatives. |
| Industrial Edge Compute | Network Equipment Power |
Use Scenario: Powering ARM-based edge AI accelerators requiring 1.5-A, 1.05-V supply with extended temperature operation. IC Role / Device Role / Timing Role: Robust POL regulator with –40°C to +85°C qualification and thermal shutdown for fanless enclosures. Use Value: Non-latching UVLO (3.8 V) and 150°C thermal shutdown ensure graceful degradation during brownouts or airflow loss. | Use Scenario: Generating auxiliary 2.5 V or 3.3 V rails for PHY, SerDes, or management MCU in 1U switches and routers. IC Role / Device Role / Timing Role: Secondary buck stage fed from 5 V or 12 V backplane, supporting multiple independent outputs. Use Value: Adjustable soft-start (via SS pin) and power-good signaling enable precise power sequencing across multi-rail systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS53355DQPR | 3-A output, 4.5–25 V input, 2.5–15 V output, 1-MHz fixed frequency, requires external compensation | Higher current, wider input range, but larger solution size and no pre-biased soft-start | Choose for >1.5-A loads or higher input voltage margin; avoid if MLCC-only design or pre-bias startup is required |
| MP2315GJ-Z | 2-A output, 4.5–28 V input, 0.8–15 V output, 500-kHz fixed frequency, integrated compensation, no PG or VO pin | Lacks power-good flag and VO-sense functionality; lower quiescent current but no D-CAP2™ transient performance | Choose for cost-sensitive, non-sequenced applications where 2-A headroom and smaller BOM matter more than fast transients |
Compared with TPS53511RGTT, TPS53355DQPR offers higher current and input voltage but sacrifices MLCC compatibility and pre-bias support; MP2315GJ-Z provides higher integration and lower IQ but lacks the precision sequencing features and transient response needed for server-grade POL.
Availability
TPS53511RGTT is available at Aetrix Electronics and suitable for server point-of-load regulation, distributed computing power systems, and industrial edge compute applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS53511RGTT 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 high-efficiency DC-DC conversion.
The TPS53511RGTT belongs to TI's D-CAP2™ synchronous buck regulator family, engineered specifically for high-density, low-component-count POL solutions in enterprise computing and networking infrastructure.
FAQ
What is the recommended input capacitor configuration for TPS53511RGTT?
TI recommends placing ≥10 µF X5R/X7R ceramic capacitor close to the VIN pins (13 and 14) with low-ESL layout, supplemented by a 0.1-µF high-frequency decoupling cap near VCC (Pin 15). This configuration suppresses high-frequency switching noise and maintains stable input impedance across the 4.5–18 V range. The TPS53511RGTT datasheet specifies these values in Section 8.2.1 and Figure 8-1.
Does TPS53511RGTT support output voltages below 1 V?
Yes, TPS53511RGTT supports output voltages as low as 2 V per the official datasheet specification, but practical operation down to 0.6 V is achievable using external resistor dividers that scale VFB - provided the feedback network maintains sufficient signal-to-noise ratio and the output capacitor ESR remains within stability limits. However, full production validation and guaranteed performance apply only to the 2–18 V range stated in the Recommended Operating Conditions table.
How does the pre-biased soft-start function work in TPS53511RGTT?
The TPS53511RGTT pre-biased soft-start monitors VFB versus internal soft-start voltage. When VFB exceeds the rising soft-start threshold, it initiates low-side FET pulses with narrow on-time, incrementing duty cycle cycle-by-cycle until reaching normal regulation. This prevents reverse current flow into a pre-charged output. The behavior is detailed in Section 7.3.3 and confirmed in Figure 6-6 of the TPS53511RGTT datasheet.
What is the thermal resistance (θJA) of TPS53511RGTT in standard JEDEC PCB conditions?
The junction-to-ambient thermal resistance (θJA) of TPS53511RGTT is 45.3°C/W under natural convection on a high-K JEDEC-standard board (JESD51-7). This value assumes full soldering of the PowerPAD™ to a 1-in² copper area connected to internal ground planes. Layout variations - especially inadequate PGND thermal vias - can degrade θJA by >20%, so thermal design must follow TI's SLUSBG4B layout guidelines.
Can TPS53511RGTT operate without an external bootstrap capacitor?
No, TPS53511RGTT requires a 0.1-µF ceramic capacitor connected between VBST (Pin 12) and SW (Pins 9/10/11) to charge the high-side gate driver. Omitting this capacitor prevents proper high-side FET turn-on, causing failure to regulate or excessive heating. The internal bootstrap diode from VREG5 to VBST is not intended for primary charging - it only supplements during startup transients, as specified in Table 5-1 and Section 7.3.4.
TPS53511RGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
TPS53511RGTT FAQ
1.How can I place an order for TPS53511RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS53511RGTT 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 TPS53511RGTT reliable?
The price and inventory of TPS53511RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS53511RGTT is usually 5 days.
3.What payment methods are accepted for TPS53511RGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS53511RGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS53511RGTT?
TPS53511RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS53511RGTT 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 TPS53511RGTT?
For technical support, including TPS53511RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS53511RGTT requirements.
6.How does Aetrix verify that TPS53511RGTT is sourced from the original manufacturer or authorized distributors?
All TPS53511RGTT 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 TPS53511RGTT meets industry standards.
7.What is the process for return or replacement of TPS53511RGTT?
All TPS53511RGTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS53511RGTT, 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 TPS53511RGTT part is unused and in its original packaging.
Return procedure for TPS53511RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS53511RGTT Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
