Texas Instruments TPS54910PWP

Overview

TPS54910PWP from Texas Instruments is a 3-V to 4-V input, 9-A synchronous buck PWM converter with integrated high- and low-side MOSFETs (15 mΩ r_DS(on)), adjustable 0.9-V to 2.5-V output, externally compensated error amplifier (1% reference accuracy), and selectable switching frequency (350/550 kHz fixed or 280–700 kHz adjustable). It serves as a point-of-load regulator for FPGAs and DSPs in compact, thermally constrained systems.

For engineers reviewing the TPS54910PWP datasheet, TPS54910PWP pinout, TPS54910PWP application, or TPS54910PWP equivalent, key selection criteria include its 28-pin HTSSOP PowerPAD™ package with dual ground planes (AGND/PGND), thermal shutdown at 150°C, UVLO with 3.0-V start threshold, and fast transient response enabled by wide-bandwidth error amplifier (3–5 MHz unity-gain bandwidth).

Technical Context

The TPS54910PWP implements a voltage-mode synchronous buck architecture with an internal high-performance error amplifier (90–110 dB open-loop gain), adaptive dead-time control, and leading-edge blanking (100 ns) for current-sense reliability. Its PWM comparator features 70–85 ns propagation delay and supports both free-running and externally synchronized operation.

Thermal management relies on the exposed PowerPAD™ connected to AGND, requiring ≥12 thermal vias and a dedicated analog ground plane. The device integrates dual ground domains-AGND for precision analog signals (VSENSE, COMP, RT) and PGND for high-current paths (VIN, PH, PGND pins 15–19)-to minimize noise coupling under 9-A load conditions.

Key Specifications

Pinout & Package

TPS54910PWP uses a thermally enhanced 28-pin HTSSOP (PWP) PowerPAD™ package (6.4 mm × 9.7 mm) with an exposed copper thermal pad soldered to AGND. The package eliminates external heatsinks and requires ≥12 thermal vias (8 in PowerPAD area, 4 under body) per TI layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54910PWP, TPS54821PWP offers higher input voltage support but sacrifices frequency flexibility and sync capability, while MP2384CGG-Z reduces size at the cost of thermal robustness and integrated diagnostics-making TPS54910PWP optimal for 3.3-V systems demanding programmability and thermal resilience.

Availability

TPS54910PWP is available at Aetrix Electronics and suitable for FPGA power delivery, DSP core supplies, optical transceiver modules, and notebook PC SoC rails requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for TPS54910PWP 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 ICs, with decades of expertise in high-efficiency DC/DC conversion.

The TPS54910PWP belongs to TI's SWIFT™ family of integrated synchronous buck regulators, designed specifically for low-voltage, high-current point-of-load applications in networking, computing, and communications infrastructure.

FAQ

What is the maximum recommended output current for TPS54910PWP under continuous operation?

The TPS54910PWP is rated for 9-A continuous output current when used with proper thermal design-including soldered PowerPAD™, ≥12 thermal vias, and a 3-inch × 3-inch 1-oz copper analog ground plane. At 70°C ambient with 3.3-V input and 2.5-V output, it delivers >90% efficiency. Exceeding 9 A risks triggering current limit or thermal shutdown.

How does the TPS54910PWP achieve precise output voltage regulation?

The TPS54910PWP achieves ±1% output accuracy using a factory-trimmed 0.891-V bandgap reference, low-input-bias-current error amplifier (60–250 nA), and externally compensated feedback loop. The VSENSE pin monitors the output divider, and the COMP pin drives a Type-2 or Type-3 network to maintain stability across load and line variations.

Can TPS54910PWP synchronize to an external clock, and what are the requirements?

Yes, TPS54910PWP supports external synchronization from 330 kHz to 700 kHz via the SYNC pin. A resistor must be connected from RT to AGND, sized to set the free-running frequency to ~80% of the external clock. The SYNC signal must meet TTL logic thresholds (low ≤0.8 V, high ≥2.5 V) and have <50-ns pulse width.

What is the role of the separate AGND and PGND pins on TPS54910PWP?

TPS54910PWP separates analog ground (AGND, Pin 1) and power ground (PGND, Pins 15–19) to isolate noise-sensitive circuitry (error amplifier, reference, compensation) from high-di/dt switching currents. AGND returns low-level signals; PGND handles high-current paths. They must connect at a single point-ideally under the PowerPAD™-to avoid ground bounce.

Does TPS54910PWP support adjustable soft-start, and how is it implemented?

Yes, TPS54910PWP supports both internal and external soft-start. Internal slow-start ramps output over 2.6–4.1 ms. An external capacitor from SS/ENA (Pin 26) to AGND extends this time linearly-approximately t_SS ≈ C_SS × 0.7 V / 5 µA-enabling precise inrush current control for sensitive downstream loads.