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Texas Instruments TPS611781RNWT
- Part No.:
- TPS611781RNWT
- Manufacturer:
- Texas Instruments
- Package:
- 13-PowerVFQFN
- Datasheet:
-
TPS611781RNWT.pdf
- Description:
- IC REG BOOST ADJ 10A 13VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:216
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Product details
Overview
TPS611781RNWT from Texas Instruments is a 20-V, 10-A fully-integrated synchronous boost converter with integrated 16-mΩ high- and low-side FETs, forced PWM mode operation at light load, adjustable switching frequency up to 2.2 MHz, and dedicated gate driver for external load disconnect FET. It delivers stable 4.5–20 V output from 2.7–20 V input in portable speaker and USB Type-C PD power stages.
For engineers reviewing the TPS611781RNWT datasheet, TPS611781RNWT pinout, TPS611781RNWT application, or TPS611781RNWT equivalent, key selection criteria include forced PWM mode (vs. auto PFM), 7.4-A typical peak current limit at RLIMIT = 80.6 kΩ, hiccup short protection with 90-ms off time, and 3.0-mm × 3.5-mm 13-pin VQFN HotRod package with enhanced thermal dissipation.
Technical Context
The TPS611781RNWT uses fixed-frequency peak current mode control with integrated slope compensation, enabling stable operation at duty cycles >50% and fast line/load transient response. Its forced PWM mode eliminates audible noise and frequency modulation at light loads-unlike the auto PFM TPS61178-making it suitable for noise-sensitive audio and display power rails.
It integrates dual 16-mΩ MOSFETs, a precision 1.198-V reference (±10 mV), 195-µS error amplifier transconductance, and programmable cycle-by-cycle current limiting via ILIMIT pin resistor. The DISDRV pin provides 55-µA sink current to drive an external P-FET for true output-to-input isolation during shutdown or fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 20 V - supports single-cell Li-ion up to 16-V nominal battery stacks and wide industrial input rails. |
| Output Voltage Range | 4.5 V to 20 V - programmable via FB resistive divider; enables direct supply for Class-D amplifiers and LCD source drivers. |
| Switch Peak Current Limit | 5.7–8.7 A (typ. 7.4 A at RLIMIT = 80.6 kΩ) - sets maximum inductor current; lower than TPS61178 due to forced PWM architecture. |
| Switching Frequency | 160–2500 kHz - adjustable via RFREQ resistor or external SYNC clock (200 kHz–2.2 MHz); enables EMI optimization and small passive sizing. |
| Efficiency | Up to 96% at VIN = 7.2 V, VOUT = 16 V, IOUT = 2 A - achieved via low RDS(on) FETs and optimized gate drive, critical for thermal-limited portable designs. |
| Protection Features | Hiccup short protection (20-A limit, 90-ms off time), OVP (20.5–21.5 V), thermal shutdown (150 °C), and UVLO (2.7-V enable, 400-mV hysteresis). |
| Package | 3.0-mm × 3.5-mm 13-pin VQFN HotRod - exposes die pad for low-thermal-resistance PCB mounting (RθJB = 14.5 °C/W). |
Pinout & Package
TPS611781RNWT is housed in a thermally enhanced 3.0-mm × 3.5-mm, 13-pin VQFN (RNW) package with exposed thermal pad. Pin 1 is FREQ/SYNC; pin 6 is PGND; pin 13 is BST. All pins are electrically and functionally identical to the TPS61178 family per TI SLVSDA7E Rev E.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FREQ / SYNC | Oscillator control / sync input | Resistor-programmable frequency (160–2500 kHz) or external clock input (200 kHz–2.2 MHz); must not float. |
| AGND | Analog ground reference | Low-noise return for FB, COMP, ILIMIT; connect to PGND at single point to avoid noise coupling. |
| ILIMIT | Peak current limit programming | Resistor to AGND sets switch current limit (e.g., 80.6 kΩ → 7.4 A typical for TPS611781). |
| COMP | Error amplifier output | Connect loop compensation network (R-C-RC) between COMP and AGND for stability across load/line variations. |
| FB | Output voltage feedback | Resistive divider sets VOUT; internal 1.198-V reference ensures ±0.8% regulation accuracy over temperature. |
| PGND | Power ground return | High-current return path for SW, VOUT, and internal FETs; separate from AGND to minimize switching noise injection. |
| SW | Switching node | Drain of low-side FET / source of high-side FET; connects to inductor and BST capacitor; high dV/dt node. |
| VOUT | Boost output power rail | Delivers regulated output; isolated from VIN via external P-FET when DISDRV controls gate during shutdown. |
| DISDRV | Load disconnect gate driver | 55-µA sink current drives external P-FET gate; enables full output disconnection for safety and sequencing. |
| VCC | Internal LDO output | 6-V regulated supply for control circuitry; requires ≥1.0-µF ceramic capacitor to AGND for stability. |
| EN | Enable logic input | Active-high (≥1.2 V) enables converter; ≤0.4 V disables with <6-µA shutdown current (VIN = 20 V). |
| VIN | Main input supply | Accepts 2.7–20 V; powers internal circuitry and high-side gate driver via bootstrap; includes 2.7-V UVLO with hysteresis. |
| BST | Bootstrap supply for high-side FET | Capacitor between BST and SW generates ~6-V gate drive; requires ≥0.1-µF X7R/X5R ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Forced PWM Mode | Eliminates light-load frequency shifting and audible coil whine-critical for portable audio and display backlight systems. |
| Dual 16-mΩ Integrated FETs | Reduces BOM count and layout area; enables >96% efficiency at 2-A load without external MOSFETs or drivers. |
| Programmable Hiccup Short Protection | 20-A short limit + 90-ms automatic recovery prevents thermal runaway while maintaining system resilience. |
| External Load Disconnect Control | DISDRV pin drives external P-FET to break output-to-input path during fault or shutdown-required for USB PD compliance. |
| Adjustable 160–2500 kHz Switching | Enables EMI spread-spectrum tuning and use of compact 0.47–3.3 µH inductors without sacrificing transient performance. |
Applications
| Portable Speaker Power | USB Type-C Power Delivery |
|---|---|
|
Use Scenario: Powers Class-D audio amplifier from single-cell Li-ion (3.0–4.2 V) to deliver 15–20 V rail. IC Role / Device Role / Timing Role: Synchronous boost regulator with forced PWM ensures silent operation during standby and burst playback. Use Value: 96% efficiency at 2 A avoids thermal throttling in sealed enclosures; hiccup protection prevents damage during speaker wire shorts. |
Use Scenario: Generates 9/15/20 V power rails for USB PD sink negotiation in portable monitors or docking stations. IC Role / Device Role / Timing Role: Primary DC-DC stage with precise VOUT regulation and fast transient response to PD contract changes. Use Value: DISDRV-controlled load disconnect meets USB PD specification requirement for output isolation during contract renegotiation or fault. |
| Source Driver for LCD Display | Supply for Motor Driver |
|
Use Scenario: Supplies 12–18 V to TFT-LCD source driver ICs requiring stable, low-noise bias voltage. IC Role / Device Role / Timing Role: High-accuracy boost converter with 1.198-V reference and tight FB tolerance (±0.8%). Use Value: Forced PWM mode prevents frequency modulation that could couple into analog video signals and cause display artifacts. |
Use Scenario: Provides 12–20 V rail to H-bridge motor drivers in cordless power tools or robotic actuators. IC Role / Device Role / Timing Role: High-current (up to 10-A peak) boost stage with robust short-circuit handling. Use Value: Dual 16-mΩ FETs and hiccup protection sustain repeated stall currents without latch-up or thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61178RNWT | Auto PFM mode at light load; 6.4–9.4 A peak current limit (vs. 5.7–8.7 A); same pinout and package. | Better light-load efficiency but may generate audible noise; unsuitable where EMI or acoustic noise is constrained. | Select TPS61178RNWT only if ultra-low quiescent current (<3 µA) and highest light-load efficiency are prioritized over noise. |
| LM61480RQWR | 42-V input, 8-A max, 2.1-MHz fixed frequency; no integrated load disconnect driver or hiccup short protection. | Lacks DISDRV pin and short-recovery timing control; requires external circuitry for output isolation and fault management. | Choose LM61480RQWR only for higher-input-voltage (>20 V) or higher-output-current (>10 A) requirements where load disconnect is handled externally. |
Compared with TPS61178RNWT and LM61480RQWR, the TPS611781RNWT uniquely combines forced PWM operation, integrated load disconnect control, and hiccup-mode short protection in a 3.0-mm × 3.5-mm footprint-enabling compact, noise-immune, and safety-compliant boost designs without added components.
Availability
TPS611781RNWT is available at Aetrix Electronics and suitable for portable speaker power, USB Type-C PD sink applications, LCD source driver supplies, and motor driver bias rails requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS611781RNWT 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in power management IC design and manufacturing.
The TPS61178x product line was engineered specifically for high-current, wide-input-voltage portable power applications-emphasizing integration, thermal performance, and protection features in minimal footprint packages.
FAQ
What is the key functional difference between TPS611781RNWT and TPS61178RNWT?
The TPS611781RNWT operates in forced PWM mode across all load conditions, eliminating light-load frequency modulation and audible noise. In contrast, the TPS61178RNWT uses auto PFM mode at light loads for higher efficiency but introduces variable switching frequency. Both share identical pinout, package, and core specifications-including 16-mΩ FETs, 20-V rating, and DISDRV functionality-but differ in current limit calibration and control behavior.
How is the peak switch current limit set on the TPS611781RNWT?
The peak switch current limit on the TPS611781RNWT is set by connecting a resistor between the ILIMIT pin and AGND. For example, an 80.6-kΩ resistor yields a typical limit of 7.4 A. The relationship follows ILIMIT ≈ 745 / RLIMIT(kΩ), with TPS611781 delivering ~0.8 A less than TPS61178 for the same resistor due to forced PWM architecture.
Does the TPS611781RNWT support external clock synchronization?
Yes, the TPS611781RNWT supports external clock synchronization via the FREQ/SYNC pin, accepting input clocks from 200 kHz to 2.2 MHz. The pin detects rising edges above 1.2 V and falling edges below 0.4 V. This capability allows EMI reduction through frequency dithering or alignment with system clocks-without requiring changes to the TPS611781RNWT's internal oscillator configuration.
What protection features does the TPS611781RNWT include?
The TPS611781RNWT includes hiccup-mode short-circuit protection (20-A threshold, 90-ms off time), output overvoltage protection (20.5–21.5 V), thermal shutdown (150 °C), input UVLO (2.7-V enable with 400-mV hysteresis), and cycle-by-cycle current limiting. These protections operate autonomously without external components, ensuring robust operation in portable and industrial environments.
Can the TPS611781RNWT drive an external P-FET for load disconnect without additional circuitry?
Yes, the TPS611781RNWT integrates a dedicated DISDRV pin that provides 55-µA sink current to directly drive the gate of an external P-channel MOSFET. No level shifter or gate driver IC is required. A series resistor and optional capacitor between DISDRV and the FET gate allow tuning of turn-on/turn-off timing to meet specific sequencing or inrush requirements in the TPS611781RNWT application.
TPS611781RNWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 13-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- 20V
- Current - Output:
- 10A (Switch)
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 13-VQFN-HR (3x3.5)
TPS611781RNWT FAQ
1.How can I place an order for TPS611781RNWT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS611781RNWT 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 TPS611781RNWT reliable?
The price and inventory of TPS611781RNWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS611781RNWT is usually 5 days.
3.What payment methods are accepted for TPS611781RNWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS611781RNWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS611781RNWT?
TPS611781RNWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS611781RNWT 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 TPS611781RNWT?
For technical support, including TPS611781RNWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS611781RNWT requirements.
6.How does Aetrix verify that TPS611781RNWT is sourced from the original manufacturer or authorized distributors?
All TPS611781RNWT 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 TPS611781RNWT meets industry standards.
7.What is the process for return or replacement of TPS611781RNWT?
All TPS611781RNWT units undergo pre-shipment inspection (PSI). If there is an issue with TPS611781RNWT, 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 TPS611781RNWT part is unused and in its original packaging.
Return procedure for TPS611781RNWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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