Texas Instruments TPS54202HDDCR

Overview

TPS54202HDDCR from Texas Instruments is a 4.5-V to 28-V input, 2-A synchronous step-down DC/DC converter with integrated 148-mΩ high-side and 78-mΩ low-side MOSFETs, fixed 500-kHz switching frequency, internal 5-ms soft start, and advanced Eco-mode™ pulse-skip operation for high light-load efficiency. It delivers regulated 5-V or 3.3-V output in compact SOT-23 (6) package for distributed power-bus supplies.

For engineers reviewing the TPS54202HDDCR datasheet, TPS54202HDDCR pinout, TPS54202HDDCR application, or TPS54202HDDCR equivalent, key selection criteria include input voltage range (4.5–28 V), continuous 2-A output capability, thermal shutdown at 155°C, overvoltage protection at 108% × V_REF, and peak current-mode control architecture with internal loop compensation.

Technical Context

The TPS54202HDDCR employs constant-frequency peak current-mode control with slope compensation to prevent subharmonic oscillation across full duty-cycle range. Its error amplifier features 240 µA/V transconductance and internal compensation, eliminating external type-II/III networks.

It integrates boot recharge diode and monitors BOOT-SW voltage with UVLO (2.1 V typical) to ensure high-side gate drive integrity. Overcurrent protection operates independently on both MOSFETs: high-side cycle-by-cycle limiting (3.2 A typ) and low-side valley-current limiting (3.0 A typ), triggering hiccup mode after 512 cycles of sustained overload.

Key Specifications

Pinout & Package

SOT-23 (6) package, 1.60 mm × 2.90 mm body size, with exposed pad for enhanced thermal performance (R_θJB = 14.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54202HDDCR, TPS54202DRCT offers identical performance in alternate packaging, while MP2307DN-LF-Z trades protection features and integration for lower unit cost-making it suitable only where robustness and ease of design are secondary to BOM cost.

Availability

TPS54202HDDCR is available at Aetrix Electronics and suitable for 12-V/24-V distributed power-bus supplies, white goods control systems, audio amplifier bias rails, and STB/DTV power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS54202HDDCR 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 company designing analog ICs, embedded processors, and system solutions for industrial, automotive, and consumer markets.

The TPS54202H product line delivers highly integrated, thermally efficient synchronous buck converters targeting space-constrained, high-reliability power conversion in industrial and consumer equipment.

FAQ

What is the maximum input voltage rating for the TPS54202HDDCR?

The TPS54202HDDCR has an absolute maximum input voltage rating of 30 V, with recommended operating range from 4.5 V to 28 V. Exceeding 30 V risks permanent damage. The device incorporates VIN under-voltage lockout (UVLO) with 4.2-V rising threshold and 400-mV hysteresis to ensure reliable startup and brownout protection. This makes the TPS54202HDDCR well-suited for 24-V industrial bus applications where transient spikes must be tolerated without failure.

Does the TPS54202HDDCR require external compensation components?

No, the TPS54202HDDCR does not require external compensation components. It features fully internal loop compensation optimized for standard output filter configurations, eliminating the need for external type-II or type-III compensation networks. This simplifies design, reduces bill-of-materials count, and improves consistency across production units. The internal compensation is validated for use with common 15-µH inductors and 22-µF–100-µF ceramic output capacitors, as shown in the TPS54202HDDCR reference design.

How does the Eco-mode™ operation improve efficiency in the TPS54202HDDCR?

Eco-mode™ in the TPS54202HDDCR enables pulse-skipping operation below ~300 mA peak inductor current, reducing switching losses and boosting light-load efficiency. During Eco-mode, the high-side MOSFET is disabled until inductor current rises above the skip threshold, resulting in burst-mode-like behavior with variable effective frequency. This design achieves >85% efficiency at 10-mA load (VIN = 12 V, VOUT = 5 V), significantly outperforming forced-PWM alternatives. The TPS54202HDDCR automatically transitions between Eco-mode and fixed-frequency PWM based on load, requiring no external control signals.

Can the TPS54202HDDCR safely start up into a pre-biased output voltage?

Yes, the TPS54202HDDCR supports safe startup into pre-biased outputs. Its control logic prevents both high-side and low-side MOSFETs from turning on until the internal soft-start voltage exceeds the FB pin voltage, eliminating reverse current flow through the low-side FET. This feature protects downstream circuitry during hot-insertion or multi-rail sequencing scenarios. Verified in TI's characterization data, the TPS54202HDDCR maintains monotonic startup even with 3.3-V or 5-V pre-bias on the output, making it ideal for complex power systems requiring strict rail-ordering compliance.

What thermal performance can be expected from the TPS54202HDDCR in SOT-23-6 package?

In the SOT-23-6 (DDC) package, the TPS54202HDDCR achieves R_θJA = 89.2°C/W (JEDEC high-K board) and R_θJB = 14.7°C/W (board conduction). With 2-A load at 12-V input and 5-V output, typical junction temperature rise is ~45°C above ambient under standard 2-layer PCB layout with 1-in² copper pour. Thermal shutdown activates at 155°C with 10°C hysteresis, and the device resumes operation only after junction cools to ~145°C and completes a 32768-cycle hiccup timer. Proper thermal pad soldering is essential to realize rated performance.