Analog Devices Inc. LT3062EDCB-3.3#TRMPBF

Overview

LT3062EDCB-3.3#TRMPBF from Analog Devices (formerly Linear Technology) is a fixed-output 3.3V, 200mA micropower low-dropout linear regulator in an 8-lead 2mm × 3mm DFN package. It operates from 1.6V to 45V input, delivers 300mV typical dropout at full load, achieves ±2% output tolerance over line/load/temperature, and features 30µVRMS output noise (10Hz–100kHz) with 10nF REF/BYP capacitor - ideal for powering precision analog sensors and low-noise RF front-ends in battery-powered instrumentation.

For engineers reviewing the LT3062EDCB-3.3#TRMPBF datasheet, LT3062EDCB-3.3#TRMPBF pinout, LT3062EDCB-3.3#TRMPBF application, or LT3062EDCB-3.3#TRMPBF equivalent, key selection considerations include its 45µA quiescent current, reverse-battery protection, shutdown current <1µA, compatibility with ceramic output capacitors ≥3.3µF, and thermal performance enabled by exposed-pad GND connection.

Technical Context

The LT3062EDCB-3.3#TRMPBF integrates a precision 600mV bandgap reference, error amplifier, and PMOS pass transistor optimized for stability with low-ESR ceramic capacitors. Its REF/BYP pin enables simultaneous soft-start and noise reduction via a single external capacitor, eliminating need for external ESR networks.

Protection architecture includes reverse-battery protection (IN to GND), reverse-output protection (OUT to GND), reverse-current blocking, foldback current limiting, and thermal shutdown with 150°C junction limit. Shutdown is controlled by a logic-level SHDN pin with 0.3V–0.7V turn-off threshold and <3µA input current.

Key Specifications

Pinout & Package

LT3062EDCB-3.3#TRMPBF uses the thermally enhanced 8-lead plastic DFN (DCB) package (2mm × 3mm), with Pin 9 as exposed GND pad requiring soldering to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and MCP1703T-3302E/MB, the LT3062EDCB-3.3#TRMPBF uniquely combines 45V input capability, 300mV dropout, and 30µVRMS noise in a thermally robust DFN - making it the only option suitable for 24V/45V battery-backed instrumentation requiring both wide input range and sub-50µV noise.

Availability

LT3062EDCB-3.3#TRMPBF is available at Aetrix Electronics and suitable for battery-powered systems, automotive power supplies, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LT3062EDCB-3.3#TRMPBF 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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.

The LT3062 series was designed by Linear Technology specifically for micropower, low-noise LDO applications in harsh environments - emphasizing wide-input operation, reverse protection, and ceramic-capacitor compatibility for industrial, automotive, and aerospace systems.

FAQ

What is the minimum input voltage required for LT3062EDCB-3.3#TRMPBF to regulate at full 200mA load?

The LT3062EDCB-3.3#TRMPBF requires a minimum input voltage of 3.6V to maintain regulation at 200mA load, calculated as V_OUT + V_DROPOUT = 3.3V + 300mV. The datasheet specifies 1.6V minimum input, but that applies only at light loads; at 200mA, dropout rises to 300mV typical, so 3.6V is the practical minimum for full-load operation.

Can LT3062EDCB-3.3#TRMPBF be used with a 10µF output capacitor, and what effect does this have on stability?

Yes, LT3062EDCB-3.3#TRMPBF is fully stable with a 10µF ceramic output capacitor - in fact, the datasheet recommends ≥3.3µF and confirms stability up to 100µF. Using 10µF improves transient response and reduces output voltage deviation during load steps, with no phase-margin penalty due to the regulator's internal compensation optimized for low-ESR ceramics.

How does the REF/BYP pin function in LT3062EDCB-3.3#TRMPBF, and what capacitor value is recommended for lowest noise?

In LT3062EDCB-3.3#TRMPBF, the REF/BYP pin connects to GND via a capacitor that bypasses the internal reference and controls soft-start timing. A 10nF capacitor achieves the specified 30µVRMS output noise (10Hz–100kHz); values below 1nF increase noise, while values above 100nF extend soft-start time without further noise reduction.

Does LT3062EDCB-3.3#TRMPBF require an external resistor divider for 3.3V operation?

No, LT3062EDCB-3.3#TRMPBF is a fixed-output variant - the 3.3V regulation is implemented internally, and the ADJ pin (Pin 2) must be left unconnected. External resistors are only required for adjustable versions like LT3062EDCB-ADJ; using them on the -3.3 variant would disrupt regulation and violate datasheet guidance.

What thermal considerations apply to LT3062EDCB-3.3#TRMPBF in a 2-layer PCB design?

For reliable operation at 200mA in a 2-layer PCB, the exposed thermal pad (Pin 9) of LT3062EDCB-3.3#TRMPBF must be soldered to a ≥100mm² copper pour connected to inner-layer ground planes via ≥4 thermal vias (0.3mm diameter). Without this, junction temperature can exceed 125°C at ambient >60°C, triggering thermal shutdown - the datasheet specifies θ_JA = 45°C/W only with proper pad soldering.