Analog Devices Inc. LTC3370EUH#TRPBF

Overview

LTC3370EUH#TRPBF from Analog Devices (formerly Linear Technology) is a configurable 4-channel synchronous buck DC/DC power supply IC integrating eight 1A power stages, each accepting independent 2.25V–5.5V inputs. It supports programmable output configurations (1A–4A per channel), 1MHz–3MHz switching frequency, and Burst Mode® or forced continuous operation - used in multirail automotive infotainment and industrial FPGA power systems.

For engineers reviewing the LTC3370EUH#TRPBF datasheet, LTC3370EUH#TRPBF pinout, LTC3370EUH#TRPBF application, or LTC3370EUH#TRPBF equivalent, key selection criteria include per-channel current configurability, precision enable thresholds for autonomous sequencing, PGOODALL status reporting, die temperature monitoring via TEMP pin, and 32-lead 5mm × 5mm QFN package thermal performance.

Technical Context

The LTC3370EUH#TRPBF implements four synchronous buck regulators sharing eight identical 1A power stages, assigned to output channels via C1–C3 pin programming. Each stage has independently supplied VIN pins (VINA–VINH), enabling true input rail isolation across domains.

Switching is phased in 90° increments to reduce input ripple; frequency is set by RT resistor (1–3MHz), internal 2MHz oscillator, or external PLL synchronization. Operating mode (Burst vs. forced continuous) is selected via PLL/MODE pin, and PGOODALL asserts low if any enabled buck falls outside ±2% (Buck1) or ±5% (Bucks2–4) of regulation.

Key Specifications

Pinout & Package

The LTC3370EUH#TRPBF is housed in a thermally enhanced 32-lead 5mm × 5mm plastic QFN package with exposed GND pad (Pin 33), requiring PCB soldering for thermal and electrical integrity. θ_JA = 34°C/W, θ_JC = 3°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4470-AEC1 and TPS65218D0, the LTC3370EUH#TRPBF uniquely delivers per-stage input isolation, eight-stage current reconfiguration, and die temperature telemetry - essential for heterogeneous, thermally constrained, or noise-sensitive multirail systems.

Availability

LTC3370EUH#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial FPGA power, and distributed telecom power nodes requiring stable component supply, extended temperature operation (–40°C to 125°C), and long-term lifecycle assurance.

Supply support for LTC3370EUH#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 acquired Linear Technology in 2017 and maintains its high-performance power management portfolio with rigorous automotive and industrial qualification standards.

The LTC3370EUH#TRPBF belongs to Linear's configurable multichannel buck regulator family, designed specifically for space-constrained systems needing flexible, isolated, and thermally aware power delivery without sacrificing efficiency or sequencing control.

FAQ

What input voltage ranges does the LTC3370EUH#TRPBF support per channel?

The LTC3370EUH#TRPBF supports 2.25V to 5.5V on each of its eight independent VIN pins (VINA–VINH). This allows distinct input sources - such as a 3.3V LDO, 5V USB, or 4.2V battery - to power individual 1A stages without cross-coupling. Absolute maximum rating is 6V per VIN pin, and undervoltage lockout triggers at ~2.05V (rising) to prevent erratic operation.

How is output current configured on the LTC3370EUH#TRPBF?

Output current per channel is configured using the C1, C2, and C3 pins (Pins 11–13), which form a 3-bit binary code selecting one of eight predefined power-stage groupings. For example, C1=C2=C3=LOW configures two 2A outputs, while C1=HIGH/C2=C3=LOW yields one 3A and one 1A output. Configuration is static at power-up and does not require I²C or digital interface.

Does the LTC3370EUH#TRPBF provide power-good status for individual channels?

No - the LTC3370EUH#TRPBF provides only a global PGOODALL signal (Pin 14), an open-drain output that goes LOW if *any* enabled buck regulator falls outside its regulation window (98% of target for Buck1, 95% for Bucks2–4). There is no per-channel PGOOD; designers must rely on PGOODALL combined with enable sequencing to infer individual rail health.

Can the LTC3370EUH#TRPBF synchronize switching to an external clock?

Yes - driving the PLL/MODE pin (Pin 28) with an external clock signal (1MHz–3MHz, t_LOW/t_HIGH >40ns) synchronizes all eight power stages to that frequency and forces forced continuous conduction mode. The device automatically adjusts slope compensation to match the external clock, ensuring stable operation without manual tuning.

What is the thermal performance specification of the LTC3370EUH#TRPBF?

The LTC3370EUH#TRPBF has a maximum junction temperature of 150°C, with overtemperature shutdown at 170°C (±5°C) and 10°C hysteresis. Its 32-lead 5mm × 5mm QFN package achieves θ_JA = 34°C/W and θ_JC = 3°C/W when the exposed pad (Pin 33) is properly soldered to a thermal plane. Die temperature is monitored continuously via the TEMP pin (220mV @ 25°C, +7mV/°C).