Analog Devices Inc. LTC1517CS5-5#TRPBF

Overview

LTC1517CS5-5#TRPBF from Analog Devices (formerly Linear Technology) is a micropower regulated 5V charge pump DC/DC converter in a 5-pin SOT-23 package. It delivers ±4% regulated 5V output from 2.7V–5V input, supports up to 20mA load at VIN ≥ 3V, draws only 6µA typical no-load supply current, and operates at 800kHz switching frequency-ideal for low-power battery-operated handheld instruments and PCMCIA supplies.

For engineers reviewing the LTC1517CS5-5#TRPBF datasheet, LTC1517CS5-5#TRPBF pinout, LTC1517CS5-5#TRPBF application, or LTC1517CS5-5#TRPBF equivalent, key selection criteria include ultralow quiescent current, inductorless operation, thermal/short-circuit protection, and compact 0.045in² board footprint with minimal external components (one 0.1µF flying cap + two bypass caps).

Technical Context

The LTC1517CS5-5#TRPBF implements a Burst Mode™ switched-capacitor voltage doubler architecture to regulate VOUT at 5V ±4%. Regulation is achieved via internal resistor-divider feedback and comparator hysteresis, enabling/disabling the 800kHz oscillator based on output droop.

It integrates thermal shutdown (trip ~160°C, recovery ~145°C) and survives indefinite VOUT-to-GND short circuits by cycling into/out of thermal protection. The device requires no inductors and uses only three external capacitors: 0.1µF flying cap (C1), ≥3.3µF input bypass (CIN), and ≥3.3µF output bypass (COUT).

Key Specifications

Pinout & Package

Package: 5-lead plastic SOT-23 (SC-74A), 2.80–3.00mm × 1.90mm × 1.10mm, 256°C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC1517CS5-5#TRPBF, LTC1522CMS8-5#TRPBF adds controllable shutdown but increases package size and pin count, while LTC1516CS5-5#TRPBF extends input range and output current at identical package size-offering trade-offs between feature set, power capability, and board area.

Availability

LTC1517CS5-5#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, handheld instruments, and PCMCIA supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for LTC1517CS5-5#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 precision analog and power management product lines with full technical and manufacturing continuity.

The LTC1517CS5-5#TRPBF belongs to Linear's micropower charge pump DC/DC converter family, designed specifically for ultra-low-power, inductorless voltage boosting in battery-critical portable electronics.

FAQ

What is the maximum continuous output current supported by the LTC1517CS5-5#TRPBF?

The LTC1517CS5-5#TRPBF delivers up to 20mA continuously when input voltage is ≥3V. At lower inputs (2.7V ≤ VIN < 3V), maximum continuous output current is limited to 10mA to maintain regulation and thermal safety. This is specified in the Electrical Characteristics table under "Output Current" with corresponding VIN conditions.

Does the LTC1517CS5-5#TRPBF require an external shutdown control signal?

No, the LTC1517CS5-5#TRPBF does not include a shutdown pin and operates continuously when powered within its input voltage range. For shutdown functionality, consider the pin-compatible LTC1522CMS8-5#TRPBF, which adds an active-low SHDN terminal while retaining the same 5V output and 6µA quiescent current.

What capacitor values are mandatory for stable operation of the LTC1517CS5-5#TRPBF?

The LTC1517CS5-5#TRPBF requires three external capacitors: a 0.1µF ceramic flying capacitor (C1) between C1+ and C1– pins; a ≥3.3µF low-ESR ceramic or tantalum input bypass capacitor (CIN) at VIN; and a ≥3.3µF low-ESR output bypass capacitor (COUT) at VOUT. Using smaller values risks regulation failure or excessive ripple.

Can the LTC1517CS5-5#TRPBF survive a sustained short circuit on its VOUT pin?

Yes, the LTC1517CS5-5#TRPBF is designed to survive indefinite VOUT-to-GND short circuits. Internal thermal shutdown disables the charge pump when junction temperature exceeds ~160°C, and re-enables it once temperature falls to ~145°C-cycling safely without damage or latch-up until the fault is removed.

Is the LTC1517CS5-5#TRPBF RoHS compliant and lead-free?

Yes, the LTC1517CS5-5#TRPBF is RoHS compliant and features lead-free (Pb-free) packaging per Analog Devices' standard specifications. The "#TRPBF" suffix explicitly denotes tape-and-reel packaging with lead-free, halogen-free construction and JEDEC-standard moisture sensitivity level (MSL) rating.