Analog Devices Inc. LTC3372EUK#TRPBF

Overview

LTC3372EUK#TRPBF from Analog Devices is a highly flexible multioutput power supply IC integrating a 4.5V–60V high-voltage synchronous buck controller and four configurable low-voltage synchronous buck regulators sharing eight 1A integrated power stages. It delivers up to 4A per channel, supports 1MHz–3MHz switching (HV runs at 1/6 frequency), achieves ≤15µA no-load IQ for HV-only operation at 5VOUT, and operates in –40°C to 125°C ambient. It targets automotive always-on systems requiring precise sequencing and thermal monitoring.

For engineers reviewing the LTC3372EUK#TRPBF datasheet, LTC3372EUK#TRPBF pinout, LTC3372EUK#TRPBF application, or LTC3372EUK#TRPBF equivalent, key selection considerations include its 8-way LV output configuration via C1–C3 pins, programmable watchdog/RST timing via CT pin, die temperature monitor (TEMP pin), precision enable thresholds (±20mV), and thermally enhanced 48-pin 7mm × 7mm QFN package with exposed GND pad.

Technical Context

The LTC3372EUK#TRPBF implements a dual-domain architecture: a high-voltage (HV) controller drives external N-channel MOSFETs using TG/BG pins and regulates VOUT/EXTVCC from 4.5V–60V input, while four low-voltage (LV) regulators use integrated 1A power stages (RPMOS = 290mΩ, RNMOS = 180mΩ) powered from independent 2.25V–5.5V inputs (VINA–H). The HV controller features adjustable soft-start (ITRACK/SS = 7–14μA), current-mode control with 75mV max sense threshold, and 60ns minimum on-time.

LV regulation employs fixed-frequency current-mode control with programmable configurations (e.g., 4×2A, 1×4A+1×2A) determined by C1–C3 logic levels; each regulator uses dedicated FBx pins with 800mV nominal feedback voltage (VFB1 = 792–808mV, VFB2–4 = 780–820mV) and supports Burst Mode for ultra-low IQ. The CT pin sets both watchdog timeout (tWDIO = 9.7–16.1s) and RST delay (tRST = 160–280ms).

Key Specifications

Pinout & Package

Package: 48-pin 7mm × 7mm plastic QFN with exposed thermal pad (Pin 49 = GND, must be soldered to PCB). θJA = 34°C/W, TJMAX = 150°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4436-AEC1 and TPS6521905, the LTC3372EUK#TRPBF uniquely combines a 60V HV controller with eight configurable 1A LV power stages and integrated die temperature monitoring-enabling single-chip power management for complex automotive and industrial systems without external FETs or thermal sensors.

Availability

LTC3372EUK#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, industrial PLC I/O modules, medical portable diagnostic devices, and telecom remote radio units requiring stable component supply, extended temperature operation (–40°C to 125°C), and long-term lifecycle support.

Supply support for LTC3372EUK#TRPBF 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power, sensing, and signal chain solutions.

The LTC3372EUK#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, high-reliability PMICs designed specifically for demanding automotive and industrial applications requiring ultra-low IQ, wide input ranges, and advanced monitoring features.

FAQ

What is the maximum input voltage supported by the LTC3372EUK#TRPBF high-voltage controller?

The LTC3372EUK#TRPBF high-voltage controller supports an absolute maximum input voltage of 65V on the VIN pin, with a recommended operating range of 4.5V to 60V. This allows direct connection to 12V, 24V, and 48V industrial and automotive power buses, including tolerance for load-dump transients up to 60V. Exceeding 65V may cause permanent damage per Absolute Maximum Ratings.

How does the C1–C3 pin configuration affect the LTC3372EUK#TRPBF's low-voltage output capabilities?

The C1–C3 pins on the LTC3372EUK#TRPBF determine how its eight integrated 1A power stages are allocated across four output channels. For example, C1=C2=C3=0 configures all four channels as 2A outputs, while C1=C2=C3=1 allocates two 4A channels. Each configuration maintains total 8A capacity but changes per-channel current capability, enabling flexible rail assignment without changing hardware layout.

What is the purpose of the CT pin on the LTC3372EUK#TRPBF, and how is it used?

The CT pin on the LTC3372EUK#TRPBF sets timing for both the watchdog timer (WDO) and power-on reset (RST) functions. Connecting a capacitor (e.g., 10nF) between CT and GND determines WDO timeout (9.7–16.1s) and RST assertion delay (160–280ms). Floating CT disables both functions. This single-pin programmability simplifies design versus separate timing components for sequencing and fault recovery.

Does the LTC3372EUK#TRPBF provide any built-in thermal protection or monitoring?

Yes, the LTC3372EUK#TRPBF includes both overtemperature shutdown (170°C, 10°C hysteresis) and an analog die temperature monitor on the TEMP pin. The TEMP output is calibrated to 220mV at 25°C with +7mV/°C slope, allowing real-time junction temperature measurement. This dual capability enables proactive thermal management and system-level safety compliance without external sensors.

What are the key differences between Burst Mode and Forced Continuous Mode operation for the LTC3372EUK#TRPBF's low-voltage regulators?

In Burst Mode, the LTC3372EUK#TRPBF's LV regulators pulse-skip at light loads to minimize IQ (e.g., 9µA per additional channel), ideal for battery-backed systems. Forced Continuous Mode maintains constant switching frequency (1–3MHz) regardless of load, reducing output ripple and EMI but increasing IQ. Mode selection is controlled via the PLL/MODE pin voltage level.