Texas Instruments TPS560430YDBVR

Overview

TPS560430YDBVR 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 2.1-MHz fixed switching frequency and PFM light-load mode. 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 TPS560430YDBVR datasheet, TPS560430YDBVR pinout, TPS560430YDBVR application, or TPS560430YDBVR equivalent, key selection considerations include its 2.1-MHz PFM operation for compact filter design, ±1.5% reference accuracy over –40°C to 125°C, 60 ns minimum on-time, hiccup-mode short-circuit protection, and SOT-23-6 package compatibility with space-constrained embedded systems.

Technical Context

The TPS560430YDBVR employs fixed-frequency peak-current mode control with internal compensation, enabling stable regulation across wide VIN and load ranges without external loop components. Its PFM mode reduces quiescent current to 80–120 µA at light loads while maintaining regulation via valley-current monitoring and zero-cross detection.

Frequency foldback activates below 133 kHz when minimum off-time (100 ns) or on-time (60 ns) limits are reached-extending duty cycle range to support high-VIN/low-VOUT and low-VIN dropout scenarios. Integrated bootstrap circuitry refreshes the high-side gate drive via the CB–SW capacitor, eliminating need for external charge pump.

Key Specifications

Pinout & Package

SOT-23-6 package (2.90 mm × 1.60 mm), thermally enhanced with exposed pad (not electrically connected), compatible with standard reflow profiles and manual soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS560430YDBVR, the XDBVR offers better mid-load efficiency but sacrifices compactness, while the YFDBVR trades light-load IQ for predictable ripple and spectral content-making TPS560430YDBVR optimal for space-constrained, general-purpose industrial rails balancing size, efficiency, and simplicity.

Availability

TPS560430YDBVR is available at Aetrix Electronics and suitable for industrial PLCs, motor drive control boards, advanced metering infrastructure, and aftermarket automotive camera modules requiring stable component supply with long-term manufacturability.

Supply support for TPS560430YDBVR 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 broad industrial and automotive qualification.

The TPS560430 family delivers rugged, easy-to-use synchronous buck converters for wide-input industrial power rails-designed to simplify design-in, reduce external component count, and ensure reliability in harsh environments.

FAQ

What is the recommended input capacitor for TPS560430YDBVR?

A 4.7–10 µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and GND pins is recommended for TPS560430YDBVR. This minimizes high-frequency switching noise and ensures stable operation during transient load steps. TI's datasheet specifies ≤10 mm trace length between C_IN and VIN/GND to maintain low impedance path and avoid instability.

Does TPS560430YDBVR support adjustable output voltage?

Yes, TPS560430YDBVR supports adjustable output voltage via an external resistor divider connected to the FB pin. With a precise 1.00 V internal reference (±1.5% over temperature), V_OUT = 1.00 × (1 + R_FBT/R_FBB). TI recommends 1% tolerance resistors with low TCR; R_FBT values between 10 kΩ and 100 kΩ provide optimal noise immunity and light-load efficiency trade-off for TPS560430YDBVR.

Can TPS560430YDBVR start up into a pre-biased output?

Yes, TPS560430YDBVR supports startup into a pre-biased output-a critical feature for hot-swap and redundant power systems. During startup, the device disables the low-side FET until the internal reference ramps up, preventing reverse current flow from the output capacitor into the IC. This behavior is confirmed in Section 8.3.1 of the TPS560430YDBVR datasheet and requires no external circuitry.

What is the thermal performance of TPS560430YDBVR in SOT-23-6 package?

TPS560430YDBVR in SOT-23-6 has R_θJA = 173°C/W (JEDEC-standard board), R_θJC(BOTTOM) = 31°C/W, and ψ_JB = 30°C/W. Under 600 mA load at 12 V_IN/5 V_OUT, typical junction temperature rise is ~35°C above ambient with 2 cm² 2-oz copper pour. For continuous 600 mA operation above 60°C ambient, additional copper area or airflow is recommended per Section 7.4 of the TPS560430YDBVR datasheet.

How does the hiccup-mode protection work in TPS560430YDBVR?

In TPS560430YDBVR, hiccup-mode activates when the feedback voltage drops below 40% of V_REF (i.e., <400 mV) for 256 consecutive switching cycles-indicating sustained short-circuit or severe overload. The device then shuts down for 135 ms (typical), after which it attempts automatic restart. This cycle repeats until the fault clears, limiting average power dissipation and preventing thermal damage without requiring external reset circuitry.