Texas Instruments TPS560430X3FDBVR

Overview

TPS560430X3FDBVR from Texas Instruments is a synchronous step-down DC-DC converter delivering up to 600 mA output current, operating from 4 V to 36 V input, with fixed 3.3 V output and 1.1-MHz FPWM switching frequency. It integrates high- and low-side MOSFETs (R_DS(on) = 450 mΩ / 240 mΩ), supports pre-biased startup, and targets industrial power rails in PLCs, motor drives, and AMI meters.

For engineers reviewing the TPS560430X3FDBVR datasheet, TPS560430X3FDBVR pinout, TPS560430X3FDBVR application, or TPS560430X3FDBVR equivalent, key selection criteria include its fixed 3.3-V output, FPWM mode for constant-frequency operation across load, ±1.5% reference tolerance over –40°C to 125°C, 60 ns minimum on-time, and SOT-23-6 package compatibility with space-constrained embedded designs.

Technical Context

The TPS560430X3FDBVR employs fixed-frequency peak-current mode control with internal compensation, eliminating external loop components. Its FPWM operation maintains constant 1.1-MHz switching across full load range, minimizing output voltage ripple and enabling predictable EMI filtering.

It features precision enable with 1.23 V threshold and 0.13 V hysteresis, cycle-by-cycle current limiting (peak: 0.8–1.4 A, valley: 0.62–0.98 A), hiccup-mode short-circuit protection, and thermal shutdown at 170°C. The device uses bootstrap gate drive (CB pin) with 100-nF capacitor and supports dropout operation via frequency foldback down to ~133 kHz under low-VIN conditions.

Key Specifications

Pinout & Package

SOT-23-6 package (2.90 mm × 1.60 mm), thermally enhanced with exposed pad (not electrically connected), suitable for high-density PCB layouts and reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS560430X3FDBVT and TPS560430XFDBVR, the TPS560430X3FDBVR offers optimal balance of fixed-rail simplicity, volume-friendly packaging, and drop-in readiness for 3.3-V industrial applications-avoiding tape-and-reel logistics overhead or feedback network tuning.

Availability

TPS560430X3FDBVR is available at Aetrix Electronics and suitable for PLC I/O modules, industrial cameras, AMI meters, and HVAC controllers requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS560430X3FDBVR 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 experience in industrial-grade power solutions.

The TPS560430 family was designed specifically for rugged industrial point-of-load conversion-emphasizing wide VIN range, integrated protection, minimal external components, and SOT-23-6 footprint for space-constrained automation equipment.

FAQ

What is the output voltage of the TPS560430X3FDBVR?

TPS560430X3FDBVR provides a fixed 3.3 V output with ±1.5% tolerance over –40°C to 125°C. Unlike adjustable versions, it does not require external feedback resistors-its FB pin is internally connected to the 1.0-V reference, simplifying layout and reducing BOM cost. This makes TPS560430X3FDBVR ideal for standardized logic rail generation in industrial control systems.

Does the TPS560430X3FDBVR support pre-biased output startup?

Yes, the TPS560430X3FDBVR supports startup with a pre-biased output. This feature prevents reverse current flow when the output capacitor is already charged-critical in hot-swap, redundant power, or backup-battery configurations. During pre-bias startup, the internal control logic disables the low-side FET until the output voltage aligns with the regulation target, ensuring safe, glitch-free turn-on without external circuitry.

What package type and dimensions does the TPS560430X3FDBVR use?

TPS560430X3FDBVR is housed in a SOT-23-6 package measuring 2.90 mm × 1.60 mm with 0.95-mm height. It features a thermally enhanced exposed pad (non-functional, not electrically connected) and standard gull-wing leads compatible with IPC-7351B footprints. This compact outline enables high-density placement in space-constrained industrial PCBs while supporting standard reflow profiles per JEDEC J-STD-020.

How does the FPWM mode in the TPS560430X3FDBVR improve system performance?

The FPWM (Forced Pulse-Width Modulation) mode in TPS560430X3FDBVR maintains constant 1.1-MHz switching frequency across all load conditions-from zero to 600 mA. This eliminates low-frequency PFM switching artifacts, reduces output voltage ripple to <10 mV_pp, and enables predictable EMI filter design. For systems with sensitive analog circuits or high-speed digital interfaces, FPWM ensures stable timing margins and lower conducted emissions compared to PFM variants.

What protection features are built into the TPS560430X3FDBVR?

TPS560430X3FDBVR includes cycle-by-cycle peak and valley current limiting, hiccup-mode short-circuit protection (135-ms off-time), thermal shutdown at 170°C, input UVLO with 3.75-V rising threshold and 0.3-V hysteresis, and bootstrap undervoltage lockout. These protections operate autonomously without external components-ensuring robust operation in harsh industrial environments where overloads, wiring faults, or thermal stress may occur.