Analog Devices Inc. LTC1754ES6-3.3#TRPBF

Overview

LTC1754ES6-3.3#TRPBF from Analog Devices (formerly Linear Technology) is a micropower regulated 3.3V charge pump DC/DC converter in a 6-pin SOT-23 package. It delivers up to 40mA output current from 2.5V–4.4V input, draws only 13µA quiescent current, features 600kHz internal oscillator, and provides ±4% output regulation - ideal for GSM SIM interface supplies and Li-ion battery backup systems.

For engineers reviewing the LTC1754ES6-3.3#TRPBF datasheet, LTC1754ES6-3.3#TRPBF pinout, LTC1754ES6-3.3#TRPBF application, or LTC1754ES6-3.3#TRPBF equivalent, key selection considerations include input voltage range (2.0V–4.4V), shutdown current (<1µA), output ripple (23mV_P-P at 40mA), thermal protection, and SOT-23 footprint compatibility with space-constrained portable designs.

Technical Context

The LTC1754ES6-3.3#TRPBF operates as a Burst Mode™ switched-capacitor voltage doubler, using internal hysteresis-based regulation to enable/disable the charge pump based on VOUT feedback. Its control loop senses output voltage via an internal resistor divider and toggles the 600kHz oscillator to maintain regulation within ±4% across load and temperature.

It integrates CMOS-level SHDN logic with 0.8V threshold, disconnects VOUT from VIN during shutdown, and includes short-circuit and thermal shutdown protection (trip at ~150°C). The architecture requires only one flying capacitor (1µF typical) and two bypass capacitors - no inductors - enabling ultrasmall 0.052 inch² circuit area.

Key Specifications

Pinout & Package

Package: 6-lead plastic SOT-23 (SC-74A), 2.80–3.00mm × 1.90mm × 1.05mm, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar regulated charge pump applications.

Compared with LTC1754ES6-3.3#TRPBF, LTC1517-3.3 offers lower IQ but insufficient current for SIM or microcontroller loads, while LTC1516 provides higher current but lacks native 3.3V regulation - making LTC1754ES6-3.3#TRPBF the optimal balance of precision, output capability, and micropower efficiency for 3.3V battery-powered systems.

Availability

LTC1754ES6-3.3#TRPBF is available at Aetrix Electronics and suitable for GSM SIM interface supplies, Li-ion battery backup systems, and handheld computer power management requiring stable component supply, long-lifecycle assurance, and consistent parametric performance.

Supply support for LTC1754ES6-3.3#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 full product support, manufacturing, and documentation for legacy Linear parts including the LTC1754 series.

The LTC1754 family was designed specifically for micropower, inductorless DC/DC conversion in space- and battery-constrained portable electronics - emphasizing ultra-low IQ, small solution size, and robust protection for consumer and industrial handheld applications.

FAQ

What is the maximum continuous output current of the LTC1754ES6-3.3#TRPBF?

The LTC1754ES6-3.3#TRPBF delivers up to 40mA continuous output current when VIN ≥ 2.5V. At lower input voltages (2.0V–2.4V), it sustains 20mA. This rating assumes proper thermal management, 10µF output capacitance, and ambient temperature ≤85°C. Exceeding 40mA may trigger thermal shutdown or cause output voltage droop beyond ±4% specification.

Does the LTC1754ES6-3.3#TRPBF require external components to operate?

Yes - the LTC1754ES6-3.3#TRPBF requires three external capacitors: one 1µF ceramic flying capacitor (CFLY) between C+ and C– pins, plus two ≥6.8µF low-ESR bypass capacitors - one at VIN and one at VOUT. No inductors or resistors are needed. These components establish regulation, filtering, and charge transfer; omitting or undersizing them degrades ripple, efficiency, and startup reliability.

How does shutdown functionality work on the LTC1754ES6-3.3#TRPBF?

The LTC1754ES6-3.3#TRPBF enters shutdown when SHDN (Pin 3) is pulled low (<0.3V). In this state, it draws <1µA from VIN and physically disconnects VOUT from the input rail - preventing backfeed. The SHDN pin is a high-impedance CMOS input; it must never float and should be actively driven. Release from shutdown occurs within 0.8ms (typical) after SHDN rises above 1.4V.

Can the LTC1754ES6-3.3#TRPBF be used with a 2.0V input supply?

Yes - the LTC1754ES6-3.3#TRPBF operates down to 2.0V input, delivering 20mA at ±4% regulation. At this voltage, efficiency remains 82%, and quiescent current is 11µA (typ). However, output current capability drops from 40mA (at VIN ≥2.5V) to 20mA, and start-up time increases slightly. It is fully specified and tested across 2.0V–4.4V per the datasheet's "G" grade conditions.

What protection features are integrated into the LTC1754ES6-3.3#TRPBF?

The LTC1754ES6-3.3#TRPBF includes short-circuit protection (survives indefinite VOUT-to-GND faults) and thermal shutdown (trips at ~150°C junction temperature, auto-recovers at ~140°C). It also features input overvoltage clamp (VIN absolute max = 6V), SHDN input overvoltage tolerance (up to 6V), and internal current limiting during startup and overload. These protections operate without external components and are guaranteed over –40°C to 85°C.