Texas Instruments LV14360SDDAR

Overview

LV14360SDDAR from Texas Instruments is a 60-V, 3-A synchronous step-down DC-DC converter with integrated high-side MOSFET (155-mΩ typical), 300-µA light-load quiescent current, adjustable 200 kHz–2 MHz switching frequency, and internal compensation. It delivers regulated output in industrial power supplies and battery-powered systems where wide VIN (4.3 V to 60 V) and low shutdown current (1 µA) are critical.

For engineers reviewing the LV14360SDDAR datasheet, LV14360SDDAR pinout, LV14360SDDAR application, or LV14360SDDAR equivalent, key selection criteria include its HSOIC-8 PowerPAD™ package, soft-start capability (SS pin), peak-current-mode control architecture, and support for external clock synchronization up to 2 MHz - all verified in TI's SNVSAZ1A datasheet.

Technical Context

The LV14360SDDAR implements fixed-frequency peak current mode control with slope compensation to ensure stability at duty cycles >50%. Its sleep mode reduces switching losses below ~300 mA load, maintaining 300-µA IQ while regulating output voltage via an internal 0.75-V reference and externally programmable feedback divider.

It supports high-duty-cycle operation (~90%) via BOOT capacitor recharge circuitry and integrates cycle-by-cycle current limiting, thermal shutdown (170°C), input UVLO (4.0 V typ. rising), and output overvoltage protection. The RT/SYNC pin enables either resistor-programmed frequency or PLL-based synchronization to external clocks from 250 kHz to 2 MHz.

Key Specifications

Pinout & Package

LV14360SDDAR uses an 8-pin HSOIC package (4.89 mm × 3.9 mm) with exposed thermal pad (DDA variant) for low R_θJC(bot) = 3.8°C/W - enabling high-power density without forced airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164QDDARQ1 and TPS54360DDAR, the LV14360SDDAR offers superior integration (internal compensation, SS pin, precision enable), lower light-load IQ (300 µA vs. 100 µA or 140 µA), and consistent 3-A capability - making it optimal for industrial and battery-critical designs where ease-of-use and efficiency across load range matter most.

Availability

LV14360SDDAR is available at Aetrix Electronics and suitable for industrial power supplies, communications equipment, and battery-powered systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LV14360SDDAR 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 - serving industrial, automotive, and communications markets since 1930.

The LV14360SDDAR belongs to TI's LV143xx family of wide-input buck converters, designed specifically for reliable, high-efficiency DC-DC conversion in harsh environments with minimal external components.

FAQ

What is the maximum input voltage rating for the LV14360SDDAR?

The LV14360SDDAR has an absolute maximum input voltage rating of 65 V on the VIN pin, with recommended operating range from 4.3 V to 60 V. Operation above 60 V risks exceeding safe operating area limits and may trigger overvoltage protection or damage the integrated high-side MOSFET. Always observe derating guidelines per TI's SNVSAZ1A datasheet Section 7.1.

Does the LV14360SDDAR require external compensation components?

No, the LV14360SDDAR features fully internal loop compensation - eliminating the need for external Type-II or Type-III compensation networks. This simplifies design, reduces bill-of-materials cost, and ensures stable operation across common output capacitor types (e.g., ceramic, polymer) without tuning. Verified in TI's application note SLVAE52.

How does the soft-start function work on the LV14360SDDAR?

The LV14360SDDAR uses an internal 3-µA current source to charge an external capacitor (CSS) connected from the SS pin to GND. The resulting voltage ramp controls the FB reference, linearly increasing output voltage over time - e.g., 100 nF yields ~33 ms soft-start. The internal soft-start resets automatically during shutdown or thermal fault events.

Can the LV14360SDDAR synchronize to an external clock, and what are the valid frequency ranges?

Yes, the LV14360SDDAR supports external clock synchronization via the RT/SYNC pin. Valid input clock frequencies range from 250 kHz to 2 MHz, with logic thresholds of 1.7 V (high) and 0.5 V (low). The device locks within 100 µs and maintains phase alignment - confirmed in Figure 8-6 through Figure 8-8 of the SNVSAZ1A datasheet.

What thermal performance can be expected from the LV14360SDDAR in its HSOIC-8 PowerPAD™ package?

In the DDA (HSOIC-8 with exposed thermal pad) package, the LV14360SDDAR achieves R_θJC(bot) = 3.8°C/W and R_θJA = 42.5°C/W with standard 2-layer PCB layout (2 oz copper, 1-in² thermal pad). At 3 A load and 24 V input, junction temperature rise remains below 65°C - enabling full-rated output without forced air or heatsink under typical ambient conditions.