Texas Instruments LMR16030PDDA

Overview

LMR16030PDDA from Texas Instruments is a 60-V, 3-A synchronous step-down DC-DC converter with integrated 155-mΩ high-side MOSFET, 40-µA quiescent current, adjustable 200 kHz–2.5 MHz switching frequency, and internal compensation. It operates from 4.3 V to 60 V input and delivers regulated output down to 0.8 V, targeting automotive battery regulation and industrial power supplies.

For engineers reviewing the LMR16030PDDA datasheet, LMR16030PDDA pinout, LMR16030PDDA application, or LMR16030PDDA equivalent, key selection considerations include its HSOIC-8 PowerPAD™ package, precision enable input, PGOOD flag (this variant), thermal shutdown at 170°C, and support for external clock synchronization up to 2.3 MHz.

Technical Context

The LMR16030PDDA implements fixed-frequency peak current mode control with sleep-mode operation below 300 mA peak inductor current, reducing quiescent current to 40 µA. Its internal compensation eliminates need for external loop components, while the BOOT-to-SW bootstrap circuit enables up to 97% duty cycle during low-dropout operation.

It features a precision 0.75-V ±15 mV feedback reference over –40°C to +125°C, programmable UVLO via EN divider, and dual-mode RT/SYNC pin supporting resistor-set frequency (200 kHz–2.5 MHz) or external clock sync (250 kHz–2.3 MHz) with PLL lock-in time under 100 µs.

Key Specifications

Pinout & Package

LMR16030PDDA uses an 8-pin HSOIC package with exposed thermal pad (4.89 mm × 3.90 mm), optimized for low R_θJC(bot) = 3.8°C/W and R_θJA = 42.5°C/W in standard 2-layer PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMR14030PDDA, LMR16030PDDA adds 20-V input headroom and PGOOD for robustness in automotive transients; versus LM76003QRNTRQ1, it trades AEC-Q100 qualification and higher frequency for lower cost, simpler layout, and proven field reliability in non-safety applications.

Availability

LMR16030PDDA is available at Aetrix Electronics and suitable for automotive battery regulation, industrial power supplies, and telecom/datacom systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LMR16030PDDA 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, and personal electronics markets.

The LMR16030PDDA belongs to TI's SIMPLE SWITCHER® family of easy-to-use DC-DC regulators, designed specifically for engineers seeking robust, wide-input-voltage power conversion with minimal external components and fast time-to-market.

FAQ

What is the maximum input voltage rating for the LMR16030PDDA?

The LMR16030PDDA has an absolute maximum input voltage rating of 65 V, with recommended continuous operation from 4.3 V to 60 V. This 60-V rating enables direct connection to 48-V industrial buses and withstands automotive load-dump transients per ISO 7637-2, making the LMR16030PDDA suitable for demanding off-board power conditioning tasks without external clamping.

Does the LMR16030PDDA include power-good signaling?

Yes, the LMR16030PDDA includes an open-drain PGOOD pin (Pin 6) that asserts low when output voltage deviates beyond ±6% of the target (94% to 107% of FB voltage). It requires an external 10–100 kΩ pullup resistor to a logic rail ≤7 V and provides precise power sequencing capability for MCUs and FPGAs, a key differentiator from soft-start-only variants like LMR16030SDDA.

How does the LMR16030PDDA achieve ultra-low quiescent current?

The LMR16030PDDA achieves 40-µA quiescent current through integrated sleep-mode operation: when load current drops below ~300 mA peak, the controller halts switching, clamps the COMP voltage at 400 mV, and powers only essential bias circuits. This architecture preserves regulation accuracy while minimizing static power draw - critical for battery-backed systems where the LMR16030PDDA extends runtime significantly versus conventional buck regulators.

Can the LMR16030PDDA synchronize to an external clock?

Yes, the LMR16030PDDA supports external clock synchronization via its RT/SYNC pin (Pin 4). When driven with a square wave between 250 kHz and 2.3 MHz - meeting 1.7 V high/0.5 V low thresholds and ≥30 ns pulse width - the internal PLL locks within 100 µs. This capability allows EMI reduction through deterministic frequency placement, a feature confirmed in the device's electrical characteristics table and functional description sections.

What package type and thermal characteristics does the LMR16030PDDA use?

The LMR16030PDDA uses an 8-pin HSOIC package with PowerPAD™ (DDA), measuring 4.89 mm × 3.90 mm with exposed thermal pad. Its thermal metrics include R_θJC(bot) = 3.8°C/W and R_θJA = 42.5°C/W on a 2-layer JEDEC board, enabling 3-A operation without forced airflow. The thermal pad must be soldered to a dedicated GND plane for effective heat dissipation - a requirement explicitly stated in the datasheet's layout guidelines.