Texas Instruments TPS54110PWPRG4

Overview

TPS54110PWPRG4 from Texas Instruments is a 3-V to 6-V input, 1.5-A synchronous step-down DC/DC converter in HTSSOP-20 PowerPAD™ package. It delivers adjustable 0.9-V to 3.3-V output with ±1% reference accuracy, supports externally compensated loop design, and integrates high- and low-side MOSFETs for high-efficiency power conversion in space-constrained point-of-load applications.

For engineers reviewing the TPS54110PWPRG4 datasheet, TPS54110PWPRG4 pinout, TPS54110PWPRG4 application, or TPS54110PWPRG4 equivalent, key selection considerations include its 350/550 kHz fixed or 280–700 kHz adjustable switching frequency, integrated VBIAS regulator, power-good (PWRGD) open-drain output, thermal shutdown at 150°C, and undervoltage lockout with 3-V start threshold.

Technical Context

The TPS54110PWPRG4 implements a voltage-mode PWM control architecture with a high-performance error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth), externally configurable compensation network (Type II or III), and adaptive dead-time control to prevent shoot-through. Its oscillator supports three configuration modes: internal 350 kHz, internal 550 kHz, or external resistor-programmed 280–700 kHz via RT pin.

It features cycle-by-cycle overcurrent protection with 100 ns leading-edge blanking and 200 ns total response time, plus thermal shutdown with 10°C hysteresis. The device includes an integrated VBIAS LDO (2.7–2.9 V output), precision 0.891-V bandgap reference trimmed during production, and a dedicated PWRGD comparator monitoring VSENSE at 93% Vref with 3% hysteresis.

Key Specifications

Pinout & Package

TPS54110PWPRG4 is housed in a thermally enhanced 20-pin HTSSOP (PWP) package measuring 6.50 mm × 4.40 mm with exposed PowerPAD™ for improved heat dissipation. The PowerPAD must be soldered to a large copper pour connected to PGND for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with TPS54210PWPR, the TPS54110PWPRG4 provides identical functionality at lower cost and smaller thermal footprint for 1.5-A applications, while LM2678SDX-ADJ/NOPB serves fundamentally different input-voltage and current-class use cases with no functional overlap in portable or low-voltage point-of-load systems.

Availability

TPS54110PWPRG4 is available at Aetrix Electronics and suitable for FPGA power delivery, DSP core regulation, optical transceiver biasing, and notebook I/O rail generation requiring stable component supply and long-term manufacturability.

Supply support for TPS54110PWPRG4 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-reliability power conversion solutions.

The TPS54110PWPRG4 belongs to TI's SWIFT™ family of integrated DC/DC converters, designed specifically for high-efficiency, low-voltage, high-current point-of-load applications in communications infrastructure, computing, and portable electronics.

FAQ

What is the recommended input capacitor configuration for TPS54110PWPRG4?

TI recommends using a combination of 1–10 µF low-ESR ceramic capacitors placed close to the VIN pins (14–16) and PGND pins (11–13), supplemented by bulk capacitance (e.g., 100 µF) on the input rail. This minimizes high-frequency switching noise and ensures stable operation under transient load conditions. The TPS54110PWPRG4 datasheet specifies 10 µF ceramic as typical for each VIN-PGND pair.

Does TPS54110PWPRG4 support external synchronization of its switching frequency?

Yes, TPS54110PWPRG4 supports external synchronization over 330–700 kHz by applying a clock signal to the SYNC pin (Pin 19) while connecting an appropriate resistor from RT (Pin 20) to AGND. The RT resistor should be selected to set the free-running frequency to ~80% of the external sync frequency. This capability enables EMI reduction through frequency dithering or alignment with system clocks.

How does the TPS54110PWPRG4 handle current-sink operation during light-load or reverse-current conditions?

The TPS54110PWPRG4 is capable of continuous current sinking - it actively turns on the low-side MOSFET to pull output voltage down when VSENSE exceeds the reference, enabling controlled discharge of output capacitance. However, overcurrent protection during sink operation relies solely on thermal shutdown, as the current-limit comparator only monitors high-side sourcing current.

What is the purpose of the VBIAS pin on TPS54110PWPRG4, and how should it be decoupled?

The VBIAS pin (Pin 17) outputs a regulated 2.7–2.9 V supply for internal analog and digital blocks. It must be bypassed with a 0.1–1 µF X7R or X5R ceramic capacitor connected directly to AGND, placed adjacent to the pin. External loading is permitted but must maintain VBIAS ≥ 2.7 V; excessive AC noise on this pin can degrade TPS54110PWPRG4 regulation accuracy and transient response.

Can TPS54110PWPRG4 be used in designs requiring output voltages below 0.9 V?

No - the TPS54110PWPRG4's internal reference is trimmed to 0.891 V with ±1% accuracy, and its feedback architecture supports output voltages from 0.9 V to 3.3 V via external resistor divider. Output voltages below 0.9 V are not supported by the device's reference and error amplifier design, and attempting such configurations may result in loss of regulation or instability.