Texas Instruments TPS54110PWPR

Overview

TPS54110PWPR from Texas Instruments is a 3-V to 6-V input, 1.5-A synchronous step-down DC/DC converter in thermally enhanced 20-pin HTSSOP (PWP) 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 TPS54110PWPR datasheet, TPS54110PWPR pinout, TPS54110PWPR application, or TPS54110PWPR equivalent, key selection considerations include its 280–700 kHz adjustable switching frequency, internal/external slow-start control, undervoltage lockout (UVLO) with 2.95 V start threshold, power-good (PWRGD) open-drain output, and thermal shutdown at 150°C - all critical for reliable FPGA/DSP supply sequencing and transient-sensitive embedded systems.

Technical Context

The TPS54110PWPR implements a voltage-mode synchronous buck architecture with an integrated high-performance error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth) and externally configurable compensation network. Its PWM control logic includes adaptive dead-time generation, cycle-by-cycle current limiting (3.0–3.5 A trip), and leading-edge blanking (100 ns) to prevent false overcurrent triggering.

Switching frequency is selectable via SYNC pin (350 kHz or 550 kHz fixed) or RT resistor (280–700 kHz range); the VBIAS regulator supplies stable 2.70–2.90 V to internal circuitry; and the PWRGD output asserts low when VSENSE falls below 93% of 0.891 V reference, with 3% hysteresis and 35 µs deglitching for noise immunity.

Key Specifications

Pinout & Package

TPS54110PWPR is housed in a 20-pin HTSSOP (PWP) package measuring 6.50 mm × 4.40 mm with exposed PowerPAD™ thermal pad for enhanced heat dissipation. The package requires soldering the PowerPAD to a large copper area on PCB for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with TPS54110PWPR, TPS54210PWPR offers higher output current in identical packaging for seamless upgrade paths, while MP2315GJ-Z trades configurability and monitoring features for compactness and cost - making TPS54110PWPR the optimal balance of flexibility, precision, and thermal performance for demanding point-of-load designs.

Availability

TPS54110PWPR is available at Aetrix Electronics and suitable for FPGA power delivery, optical transceiver biasing, and notebook embedded processor supply applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS54110PWPR 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 ICs.

The TPS54110PWPR belongs to TI's SWIFT™ family of synchronous buck converters, designed specifically for high-efficiency, low-voltage, high-current point-of-load regulation in communications infrastructure, computing, and portable electronics.

FAQ

What is the recommended input capacitor configuration for TPS54110PWPR?

TI recommends using a combination of 1–10 µF ceramic capacitors placed close to VIN pins (14–16) and PGND pins (11–13), with at least one 10 µF X7R/X5R MLCC. The TPS54110PWPR datasheet specifies low-ESR ceramics to minimize input ripple and ensure stable operation under 1.5-A load steps. Bulk capacitance beyond 10 µF may be added externally depending on system-level hold-up requirements.

Does TPS54110PWPR support external synchronization of its switching frequency?

Yes, TPS54110PWPR supports external synchronization via the SYNC pin over 330–700 kHz. To synchronize, apply a clean square wave to SYNC and connect an RT resistor to AGND that sets the free-running frequency to ~80% of the external clock. This feature allows TPS54110PWPR to align switching edges with system clocks, reducing beat frequencies in sensitive analog or RF sections of the design.

How is the output voltage set on TPS54110PWPR?

The output voltage of TPS54110PWPR is set by a resistive divider from VOUT to AGND, feeding the VSENSE pin (Pin 2). With an internal 0.891 V reference, the formula is VOUT = 0.891 × (1 + R1/R2), where R1 connects VOUT to VSENSE and R2 connects VSENSE to AGND. TI provides design calculators and typical resistor values (e.g., 19.1 kΩ and 2.05 kΩ for 3.3 V) in the TPS54110PWPR application schematic.

What thermal design guidelines apply to TPS54110PWPR in the PWP package?

TPS54110PWPR requires the exposed PowerPAD™ thermal pad to be soldered to a minimum 100 mm² copper area on the PCB, connected to PGND with ≥4 thermal vias (0.3 mm diameter, filled or plated). TI specifies RθJA = 34.0 °C/W with this layout; inadequate thermal relief causes junction temperatures to exceed 125°C under 1.5-A load at 6 V input, triggering thermal shutdown. Thermal simulation and IR imaging are recommended for high-ambient deployments.

Can TPS54110PWPR sink current during light-load or transient conditions?

Yes, TPS54110PWPR supports continuous current sinking - a key feature for applications with bidirectional energy flow, such as FPGA I/O banks or DDR termination. When VOUT exceeds the regulated setpoint, the low-side MOSFET remains active to pull current from the output, preventing voltage overshoot. This behavior is explicitly documented in the TPS54110PWPR functional description and confirmed in Figure 9's application schematic.