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Texas Instruments TPS54061DRBT
- Part No.:
- TPS54061DRBT
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS54061DRBT.pdf
- Description:
- IC REG BUCK ADJ 200MA 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,510
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Product details
Overview
TPS54061DRBT from Texas Instruments is a 60-V input, 200-mA synchronous step-down DC-DC converter with integrated high-side (1.5 Ω) and low-side (0.8 Ω) n-channel MOSFETs, 90 µA non-switching quiescent current, and adjustable 50–1100 kHz switching frequency. It delivers regulated output down to 0.8 V in industrial process control sensors powered by 4–20 mA loops.
For engineers reviewing the TPS54061DRBT datasheet, TPS54061DRBT pinout, TPS54061DRBT application, or TPS54061DRBT equivalent, key selection considerations include its wide 4.7–60 V input range, diode emulation for light-load efficiency, internal slow-start (2.36 ms), cycle-by-cycle current limit (250–500 mA), and thermal shutdown at 176°C - all in a 3 mm × 3 mm VSON-8 package with exposed thermal pad.
Technical Context
The TPS54061DRBT implements peak current-mode control with slope compensation to prevent subharmonic oscillation, using an internal transconductance error amplifier (108 µS typical) and a precision 0.8 V ±1% reference. Its RT/CLK pin supports both resistor-programmed frequency (50–1100 kHz) and external clock synchronization (300–1100 kHz) via PLL lock.
It integrates boot recharge functionality, monitors BOOT-PH voltage (UVLO at 2.9 V), enforces minimum on-time (120 ns), and applies dead time (30 ns) between high- and low-side switches. Overvoltage protection triggers at 109% of nominal output, and frequency foldback activates during overcurrent or startup to limit inductor current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.7 V to 60 V - supports direct connection to unregulated industrial rails, battery stacks, or PoE-derived supplies without pre-regulation. |
| Output Current | 200 mA continuous - sufficient for biasing isolated ADCs, RS-485 transceivers, or microcontrollers in low-power remote I/O modules. |
| Quiescent Current | 90 µA (non-switching), 1.4 µA (shutdown) - enables multi-year operation from coin cells or energy-harvested sources in always-on sensor nodes. |
| Switching Frequency | 50–1100 kHz (adjustable via RT resistor or external clock) - allows trade-off between inductor size (higher fSW) and efficiency (lower fSW at light load). |
| Voltage Reference | 0.8 V ±1% at TJ = 25°C - sets absolute accuracy limit for output regulation; tolerance expands to ±2% over –40°C to 150°C junction range. |
| Current Limit Threshold | 250–500 mA (high-side sourcing) - provides robust short-circuit protection while permitting brief inrush during cold-start of capacitive loads. |
| Thermal Shutdown | 176°C junction temperature - protects against sustained overload or poor PCB thermal design; auto-recovery after cooldown. |
Pinout & Package
VSON-8 (DRB) package: 3.00 mm × 3.00 mm body with exposed thermal pad (Pin 9) requiring solder connection to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (1) | Bootstrap capacitor node | Supplies gate drive for high-side MOSFET; requires 0.1 µF ceramic capacitor to PH; UVLO disables switch if voltage drops below 2.9 V. |
| VIN (2) | Main power input | Accepts 4.7–60 V; powers internal circuitry and high-side gate driver; must be bypassed with ≥10 µF low-ESR capacitor near IC. |
| EN (3) | Enable control with UVLO adjustment | Pull below 1.18 V to disable; float or pull above 1.23 V to enable; internal 1.2 µA pull-up enables default operation and supports resistor-divider UVLO programming. |
| RT/CLK (4) | Frequency programming / sync input | Resistor-to-ground sets fSW (50–1100 kHz); external clock >300 kHz synchronizes PH rising edge to CLK falling edge via PLL. |
| VSENSE (5) | Feedback input | Inverting input of error amplifier; connects to resistor divider from VOUT; 0.8 V reference defines regulation point. |
| COMP (6) | Error amplifier output | Connects external RC compensation network; gm = 108 µS; drives current comparator to control high-side on-time. |
| GND (7) | Power and signal ground | Common return for VIN, PH, and internal circuits; must be low-impedance path to thermal pad. |
| PH (8) | Switch node | Source of high-side MOSFET and drain of low-side MOSFET; connects to inductor; fast switching demands tight layout and low-inductance routing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | 1.5 Ω high-side + 0.8 Ω low-side n-channel devices eliminate external switches and reduce BOM count by 4+ components. |
| Diode Emulation Mode | Disables low-side MOSFET at zero inductor current, eliminating reverse recovery losses and improving efficiency below 10 mA load. |
| Internal Slow-Start | 2.36 ms (10%–90%) ramp time prevents inrush current into output capacitors; resets automatically during thermal fault or EN deassertion. |
| Ceramic-Capacitor Stability | Compensated for use with low-ESR ceramic output caps (no aluminum electrolytic required), reducing solution size and improving transient response. |
| Comprehensive Protection | Cycle-by-cycle current limit, thermal shutdown (176°C), output overvoltage (109%), and BOOT-PH UVLO ensure robust operation under fault conditions. |
Applications
| 4–20 mA Current-Loop Sensors | Industrial Process Controllers |
|---|---|
Use Scenario: Powering loop-powered temperature, pressure, or flow transmitters connected to PLC analog inputs. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting loop voltage (12–40 V) to stable 3.3 V or 5 V for sensor electronics and signal conditioning. Use Value: 90 µA quiescent current ensures minimal loop burden; 60 V max input withstands surge transients per IEC 61000-4-5; diode emulation maintains >85% efficiency at 1 mA load. |
Use Scenario: Generating auxiliary bias rails in programmable logic controllers, distributed I/O modules, or HART-enabled field devices. IC Role / Device Role / Timing Role: Standby supply for real-time clocks, memory retention, or communication interfaces during main system sleep. Use Value: 1.4 µA shutdown current extends battery backup life; VSON-8 thermal pad enables conduction cooling in sealed enclosures; –40°C to 150°C rating suits harsh environments. |
| High-Voltage Linear Regulator Replacement | Metering & Security Systems |
Use Scenario: Replacing inefficient 78L05-style linear regulators in battery-backed utility meters or solar charge controllers with 24–48 V input. IC Role / Device Role / Timing Role: Efficient buck converter delivering 5 V @ 150 mA to MCU, RTC, and EEPROM with minimal heat dissipation. Use Value: >90% efficiency at 12 VIN/5 VOUT eliminates need for heatsinks; adjustable fSW allows optimization for EMI compliance in metering bands. |
Use Scenario: Powering tamper-detection circuits, secure crypto modules, or wireless transceivers in smart grid endpoints or access control panels. IC Role / Device Role / Timing Role: Isolated secondary-side regulator fed from flyback or transformer output, providing clean 3.3 V for security ICs. Use Value: 0.8 V reference enables precise output setting; cycle-by-cycle current limit prevents latch-up during ESD events; OVP protects downstream security hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164DRCT | 4.5–65 V input, 300 mA, 1.5 µA shutdown IQ, no integrated low-side FET (requires external diode or MOSFET) | Better suited for higher-current, ultra-low-IQ standby rails where external component count is acceptable | Choose LM5164DRCT when >200 mA output or <2 µA shutdown current is mandatory; accept added complexity for extended battery life. |
| TPS54260DGQR | 3.5–60 V input, 600 mA, 138 µA operating IQ, SOIC-8 package (larger footprint, lower thermal performance) | Preferred for designs needing higher output current and board-level serviceability over compactness | Choose TPS54260DGQR when 600 mA load capability is required and thermal pad soldering is impractical; expect ~2× larger PCB area. |
Compared with LM5164DRCT and TPS54260DGQR, the TPS54061DRBT offers the smallest footprint (3 mm × 3 mm), lowest operating IQ (90 µA), and fully integrated dual-FET architecture - making it optimal for space-constrained, low-power industrial sensors where BOM simplicity and thermal efficiency are prioritized over peak current or ultra-deep sleep.
Availability
TPS54061DRBT is available at Aetrix Electronics and suitable for industrial process control, 4–20 mA loop-powered sensors, and high-voltage bias supply applications requiring stable component supply across long product lifecycles.
Supply support for TPS54061DRBT 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 connectivity technologies, with decades of expertise in power management ICs for industrial and automotive markets.
The TPS54061DRBT belongs to TI's wide-input synchronous buck converter family, designed specifically for ruggedized industrial power conversion where high input voltage tolerance, low quiescent current, and integrated FETs reduce system size and improve reliability.
FAQ
What is the minimum controllable on-time of the TPS54061DRBT, and how does it affect maximum input voltage at high switching frequencies?
TPS54061DRBT has a minimum controllable on-time of 120 ns. At high input voltages and high switching frequencies, this limits the achievable duty cycle. For example, at 1 MHz fSW, the maximum theoretical duty cycle is 12%, restricting practical VIN/VOUT ratios. The device mitigates this via frequency foldback and digital frequency shift (dividing fSW by up to 8) during overload or startup to maintain control - a behavior confirmed in Section 7.3.9 of the TPS54061DRBT datasheet.
Can the TPS54061DRBT operate with ceramic output capacitors only, and what compensation is required?
Yes, the TPS54061DRBT is explicitly characterized and stabilized for use with ceramic output capacitors - no aluminum electrolytic is needed. Compensation is applied via external components (capacitor, series resistor, capacitor) connected between COMP and GND. The error amplifier's transconductance (108 µS) and target crossover frequency determine values; TI provides design calculators and WEBENCH® support for TPS54061DRBT-specific compensation networks.
How does the EN pin function, and can it be used to adjust undervoltage lockout (UVLO)?
The EN pin on the TPS54061DRBT features an internal 1.2 µA pull-up current source. Floating EN enables operation; pulling below 1.18 V disables the device. Two external resistors form a voltage divider from VIN to EN to raise the effective UVLO threshold above the internal 4.5 V start point. Hysteresis (~3.5 µA additional sink current) ensures clean turn-on/turn-off transitions - details are provided in Figure 18 and Section 7.3.6 of the TPS54061DRBT datasheet.
What protection features are built into the TPS54061DRBT, and how do they activate?
The TPS54061DRBT includes cycle-by-cycle current limiting (triggered at 250–500 mA), thermal shutdown at 176°C, output overvoltage protection (109% of setpoint), BOOT-PH UVLO (2.9 V), and frequency foldback during overcurrent or startup. These operate independently: current limit clamps COMP voltage each cycle; thermal shutdown latches off the controller until cooldown; OVP disables the high-side MOSFET immediately upon detection.
Is the TPS54061DRBT pin-compatible with other members of the TPS54x6x family, such as the TPS54060DRBT?
No, the TPS54061DRBT is not pin-compatible with the TPS54060DRBT. While both are 60-V, 200-mA synchronous buck converters in VSON-8 packages, the TPS54061DRBT includes an integrated boot recharge diode and different internal gate drive architecture. Pin functions differ - notably, the TPS54060DRBT lacks the dedicated RT/CLK pin and uses a different frequency programming method. Direct replacement requires PCB redesign and validation.
TPS54061DRBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN 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):
- 4.7V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 58V
- Current - Output:
- 200mA
- Frequency - Switching:
- 50kHz ~ 1.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
TPS54061DRBT FAQ
1.How can I place an order for TPS54061DRBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54061DRBT 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 TPS54061DRBT reliable?
The price and inventory of TPS54061DRBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54061DRBT is usually 5 days.
3.What payment methods are accepted for TPS54061DRBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54061DRBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54061DRBT?
TPS54061DRBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54061DRBT 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 TPS54061DRBT?
For technical support, including TPS54061DRBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54061DRBT requirements.
6.How does Aetrix verify that TPS54061DRBT is sourced from the original manufacturer or authorized distributors?
All TPS54061DRBT 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 TPS54061DRBT meets industry standards.
7.What is the process for return or replacement of TPS54061DRBT?
All TPS54061DRBT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54061DRBT, 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 TPS54061DRBT part is unused and in its original packaging.
Return procedure for TPS54061DRBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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