Analog Devices Inc. LTC3410ESC6-1.8#TRPBF

Overview

LTC3410ESC6-1.8#TRPBF from Analog Devices (formerly Linear Technology) is a fixed-output, monolithic synchronous step-down DC/DC regulator delivering 1.8V at up to 300mA from a 2.5V–5.5V input. It employs constant-frequency current-mode control at 2.25MHz, integrates P- and N-channel MOSFETs, and achieves up to 96% efficiency with ceramic output capacitors. It serves as the core power supply for low-voltage digital subsystems in battery-powered portable electronics.

For engineers reviewing the LTC3410ESC6-1.8#TRPBF datasheet, LTC3410ESC6-1.8#TRPBF pinout, LTC3410ESC6-1.8#TRPBF application, or LTC3410ESC6-1.8#TRPBF equivalent, key selection criteria include its 1.8V ±2% output accuracy, 26µA quiescent current in Burst Mode, 100% duty-cycle dropout capability, SC70-6 package footprint, and compatibility with 4.7µF ceramic input/output capacitors.

Technical Context

The LTC3410ESC6-1.8#TRPBF implements a constant-frequency (2.25MHz), current-mode synchronous buck architecture with internal 0.75Ω P-channel and 0.55Ω N-channel MOSFETs. Its feedback loop references an internal 0.8V bandgap, scaled to deliver a fixed 1.8V output via on-die resistor divider - eliminating external resistors and enabling precise regulation without trimming.

Burst Mode operation reduces quiescent current to 26µA at light loads by intermittently enabling switching cycles while maintaining output voltage regulation; shutdown draws <1µA. Overtemperature protection disables both switches when junction temperature exceeds ~150°C, forcing SW into high-impedance state.

Key Specifications

Pinout & Package

Supplied in a 6-lead plastic SC70 package (JEDEC MO-203AA), the LTC3410ESC6-1.8#TRPBF features a compact footprint optimized for space-constrained portable PCBs. Thermal resistance θ_JA is 250°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC3410ESC6-1.8#TRPBF, TPS62231DRYR offers lower quiescent current and higher switching frequency but requires more careful EMI filtering; AP63202WU-18 provides 6.7× higher current capacity in a smaller footprint but targets different thermal and cost segments - neither is pin-compatible, and all require PCB layout revision.

Availability

LTC3410ESC6-1.8#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, wireless modems, digital cameras, and MP3 players requiring stable component supply, long-term manufacturability, and qualified automotive-grade alternatives.

Supply support for LTC3410ESC6-1.8#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 technical and manufacturing continuity for the LTC portfolio. Linear's legacy precision analog and power management ICs remain industry benchmarks for performance and reliability.

The LTC3410ESC6-1.8#TRPBF belongs to Linear's high-efficiency monolithic DC/DC regulator family, designed specifically for space- and power-constrained portable electronics powered by single-cell Li-ion batteries.

FAQ

What is the maximum continuous output current of the LTC3410ESC6-1.8#TRPBF?

The LTC3410ESC6-1.8#TRPBF delivers up to 300mA continuous output current when VIN ≥ 3V and ambient temperature remains within specification. This limit is constrained by thermal dissipation in the SC70 package and the 380mA peak switch current rating. At lower input voltages (e.g., 2.7V in dropout), achievable current drops due to increased conduction losses in the internal P-channel MOSFET.

Does the LTC3410ESC6-1.8#TRPBF require external feedback resistors?

No. The LTC3410ESC6-1.8#TRPBF is a fixed-output variant with an internal resistor divider that sets VOUT to 1.8V. Pin 6 is labeled VOUT (not VFB) and connects directly to the output capacitor - no external resistors are needed, simplifying layout and improving accuracy versus adjustable versions.

What ceramic capacitor values are recommended for input and output with the LTC3410ESC6-1.8#TRPBF?

Analytical and empirical validation supports 4.7µF X5R or X7R ceramic capacitors for both CIN and COUT when VOUT = 1.8V. These values provide sufficient RMS current handling, low ESR for ripple suppression (<20mV_P-P), and stability margin. Larger values (e.g., 10µF) may be used if board space permits, but are not required.

How does Burst Mode operation affect output voltage ripple in the LTC3410ESC6-1.8#TRPBF?

In Burst Mode, the LTC3410ESC6-1.8#TRPBF reduces switching activity at light loads, resulting in low-frequency envelope modulation of the output ripple. While peak-to-peak amplitude remains ≤20mV, the ripple spectrum contains sub-harmonics near the burst frequency (typically 1–10kHz). This is acceptable for most digital loads but may require additional LC filtering for sensitive analog circuits.

Is the LTC3410ESC6-1.8#TRPBF compatible with lead-free reflow soldering processes?

Yes. The LTC3410ESC6-1.8#TRPBF carries the #PBF suffix, indicating it is lead-free and qualified for standard Pb-free reflow profiles (J-STD-020D, peak temperature 260°C). Its SC70 package withstands 10-second soldering at 300°C per JEDEC specifications, and the device meets RoHS Directive 2011/65/EU requirements.