Texas Instruments LM61480Q5RPHRQ1

Overview

LM61480Q5RPHRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter delivering up to 8 A output current, operating from 3 V to 36 V input, with fixed 5 V output, 2.2 MHz switching frequency (pin-selectable), and integrated high- and low-side MOSFETs (R_DS(on) = 21 mΩ / 13 mΩ). It powers ADAS camera modules requiring stable, low-EMI 5 V rails.

For engineers reviewing the LM61480Q5RPHRQ1 datasheet, LM61480Q5RPHRQ1 pinout, LM61480Q5RPHRQ1 application, or LM61480Q5RPHRQ1 equivalent, key selection criteria include its 5 V fixed output accuracy (±1.5%), 95.1% efficiency at 8 A/400 kHz, RESET output with 2.1 ms active delay, and wettable-flank 4.5 mm × 3.5 mm VQFN-HR (RPH) package optimized for automotive thermal and EMI constraints.

Technical Context

The LM61480Q5RPHRQ1 implements a synchronous buck topology with internal dual-MOSFET power stage, adjustable SW node rise time via R_BOOT, and pin-configurable spread spectrum (±4% Δf) using DRSS modulation. Its dual-mode operation supports auto PFM/PWM transition and external synchronization via SYNC/MODE pin.

Thermal design leverages a 4.5 mm × 3.5 mm wettable-flank QFN package with θ_JA = 21.6°C/W on EVM, while functional safety support includes documentation for ISO 26262 ASIL-B system integration. The device sustains 42 V transients ≤100 ms and features built-in hiccup protection with 40 ms fault recovery timing.

Key Specifications

Pinout & Package

LM61480Q5RPHRQ1 uses a 16-pin VQFN-HR (RPH) package with 4.5 mm × 3.5 mm footprint and wettable flanks for automated optical inspection and enhanced solder joint reliability in automotive reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM61495Q5RPHRQ1 and LM62460Q5RPHRQ1, the LM61480Q5RPHRQ1 delivers optimal balance of 8 A output, thermal performance (21.6°C/W), and EMI robustness - making it the preferred choice for mid-tier ADAS and instrument cluster designs where 6 A is insufficient but 10 A is over-specified.

Availability

LM61480Q5RPHRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and instrument cluster applications requiring stable component supply across extended temperature and long lifecycle requirements.

Supply support for LM61480Q5RPHRQ1 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 and embedded processing technologies, with deep expertise in automotive-grade power management ICs.

The LM6x4xx-Q1 product line was engineered specifically for automotive power density and EMI-constrained environments, targeting ADAS, infotainment, and body electronics systems demanding AEC-Q100 compliance and functional safety readiness.

FAQ

What is the maximum continuous output current supported by the LM61480Q5RPHRQ1?

The LM61480Q5RPHRQ1 supports up to 8 A continuous output current under recommended thermal conditions. This rating is validated with the device mounted on a standard 4-layer evaluation board achieving θ_JA = 21.6°C/W. Derating applies above +125°C ambient or with reduced copper area; full 8 A operation requires proper PCB layout with thermal vias and ground plane exposure per TI's LM61480RPHEVM guidelines.

Does the LM61480Q5RPHRQ1 require external compensation components?

No, the LM61480Q5RPHRQ1 features fully integrated compensation circuitry. Its internal Type III compensator eliminates the need for external RC networks or op-amps, reducing BOM count and layout complexity. Stability is guaranteed across all operating conditions - including 3 V to 36 V input range and 0–8 A load - without user-adjustable compensation components.

How does the RESET output of the LM61480Q5RPHRQ1 behave during startup and fault conditions?

The LM61480Q5RPHRQ1 RESET output remains low until the FB voltage reaches 94% of the 5 V target and remains stable for 2.1 ms, then transitions high. During undervoltage (FB < 94%) or EN deactivation, RESET asserts low within 26 µs. It is open-drain and requires an external pull-up; typical use connects to a microcontroller's reset input with a 10 kΩ resistor to 3.3 V or 5 V.

Can the LM61480Q5RPHRQ1 operate with input voltages below 3.7 V?

Yes, the LM61480Q5RPHRQ1 operates down to 3.0 V after initial startup, though 3.7 V is required to initiate regulation. Once running, it maintains regulation through cold-crank events as low as 3.0 V - critical for automotive stop-start systems. Startup behavior is verified across –40°C to +125°C ambient, with internal VCC UVLO releasing at 3.7 V and 1.2 V hysteresis.

Is the LM61480Q5RPHRQ1 pin-compatible with other devices in the LM6x4xx-Q1 family?

Yes, the LM61480Q5RPHRQ1 is pin-to-pin compatible with LM61495Q5RPHRQ1 and LM62460Q5RPHRQ1 in the same RPH package. All share identical pin functions, thermal pad layout, and PCB footprint. This allows direct substitution for current-rating scalability - e.g., upgrading from LM62460Q5RPHRQ1 (6 A) to LM61480Q5RPHRQ1 (8 A) without layout changes - provided thermal and current path routing supports the higher load.