Texas Instruments LMR16006YQDDCTQ1

Overview

LMR16006YQDDCTQ1 from Texas Instruments is an automotive-grade synchronous buck DC-DC regulator delivering up to 600 mA output current with fixed 2.1 MHz switching frequency, 0.765 V feedback reference, and ultra-low 28 µA standby current in ECO mode. It operates from 4 V to 40 V input, supports high duty cycle (97%), and integrates internal compensation and soft-start for battery-powered automotive power conditioning.

For engineers reviewing the LMR16006YQDDCTQ1 datasheet, LMR16006YQDDCTQ1 pinout, LMR16006YQDDCTQ1 application, or LMR16006YQDDCTQ1 equivalent, key selection considerations include AEC-Q100 Grade 1 qualification (-40°C to +125°C), 1 µA shutdown current, integrated boot diode, and CB/SW bootstrap operation requiring external 100 nF capacitor.

Technical Context

The LMR16006YQDDCTQ1 uses constant-frequency peak current-mode control with internal slope compensation and leading-edge blanking for stable transient response. Its integrated high-side MOSFET features 900 mΩ R_DS(on), while the bootstrap circuit (CB–SW) enables high-duty-cycle operation via automatic refresh and UVLO protection below 3 V.

ECO mode activates when inductor peak current falls ≤80 mA, reducing quiescent current to 28 µA without compromising regulation. Overvoltage transient protection (OVTP) clamps the high-side switch when FB exceeds 108% of 0.765 V, limiting output overshoot during load unload-critical for low-C_OUT designs.

Key Specifications

Pinout & Package

LMR16006YQDDCTQ1 is housed in a thermally enhanced SOT-6L package (2.9 mm × 1.6 mm, 0.95 mm height) with exposed pad for improved heat dissipation in space-constrained automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMR14006QDDCTQ1, the LMR16006YQDDCTQ1 offers lower R_DS(on) and better light-load efficiency for cabin applications; versus TPS54302QDDCRQ1, it provides simpler implementation and smaller footprint where 600 mA suffices.

Availability

LMR16006YQDDCTQ1 is available at Aetrix Electronics and suitable for automotive body control, aftermarket infotainment, and industrial telematics requiring stable component supply with AEC-Q100 traceability and long-term lifecycle support.

Supply support for LMR16006YQDDCTQ1 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 deep expertise in automotive electronics and functional safety.

The LMR16006YQDDCTQ1 belongs to TI's SIMPLE SWITCHER® automotive buck regulator family, designed specifically for robust, low-EMI, high-efficiency power conversion in harsh automotive environments.

FAQ

What is the maximum input voltage transient rating for LMR16006YQDDCTQ1?

The LMR16006YQDDCTQ1 supports input transients up to 65 V per absolute maximum ratings, making it suitable for automotive applications subject to load dump per ISO 7637-2 Pulse 5a. This rating applies for short-duration events (<100 ms); continuous operation remains limited to 40 V. The device incorporates internal overvoltage protection on VIN, SHDN, and FB pins to prevent latch-up or damage during such transients. Always verify system-level clamping with appropriate input TVS if transients exceed 65 V.

Does LMR16006YQDDCTQ1 require an external bootstrap diode?

No, the LMR16006YQDDCTQ1 integrates the bootstrap diode internally, eliminating the need for an external component between CB and VIN. This reduces bill-of-materials count and PCB area while improving reliability. The internal diode charges the CB–SW capacitor during the low-side conduction phase. Ensure the CB capacitor is a high-quality 100 nF X7R ceramic placed as close as possible to the CB and SW pins to maintain stable gate drive under all load conditions.

How does ECO mode operate in LMR16006YQDDCTQ1, and what triggers it?

ECO mode in the LMR16006YQDDCTQ1 activates automatically when inductor peak current drops to ≤80 mA while maintaining output regulation-typically at light loads (<100 mA). In this mode, switching frequency is reduced and gate drive losses minimized, lowering quiescent current to 28 µA. It is not triggered by average load current but by instantaneous inductor current sensing. The transition is seamless and maintains ±3% output accuracy. ECO mode deactivates immediately when load increases beyond the threshold.

What is the purpose of the OVTP (Overvoltage Transient Protection) feature in LMR16006YQDDCTQ1?

The OVTP feature in the LMR16006YQDDCTQ1 monitors the FB pin voltage and disables the high-side MOSFET when it exceeds 0.826 V (108% of the 0.765 V internal reference), preventing output voltage overshoot during rapid load unload transients. This is especially valuable when using low-value ceramic output capacitors (<10 µF), where energy stored in the inductor can cause significant overshoot. OVTP acts within one switching cycle and re-enables the high-side switch once FB falls below threshold-no external components or configuration required.

Can LMR16006YQDDCTQ1 be used with a fixed 3.3 V output without external resistors?

Yes-the LMR16006YQDDCTQ1 is the adjustable version, but Texas Instruments offers pin-compatible fixed-output variants: LMR16006YQ3Q1 for 3.3 V and LMR16006YQ5Q1 for 5 V. These variants integrate the feedback divider internally and require no external R1/R2 resistors. If using the LMR16006YQDDCTQ1, a resistor divider must be connected between VOUT, FB, and GND to set 3.3 V (e.g., R1 = 34.8 kΩ, R2 = 10 kΩ). Do not substitute fixed-output variants without verifying pin compatibility and thermal performance in your layout.