LT1303IS8-5#TRPBF

Overview

The LT1303IS8-5#TRPBF is a micropower step-up DC/DC converter manufactured by Analog Devices Inc., housed in an SOIC-8 surface-mount package. It operates as a fixed 5V output regulator with a maximum output current of 200 mA. The device accepts an input voltage range from 1.8 V to 6 V and utilizes Burst Mode operation for high efficiency. Key electrical parameters include a quiescent current of 120 µA, which reduces to 10 µA in shutdown mode, and a switching frequency of 155 kHz. The on-chip NPN power switch features a low saturation voltage of 170 mV at 1 A switch current. It includes a low-battery detector and functions within a temperature range of 0°C to +70°C.

Feature Summary

• Integrates a low-battery detector providing an open-collector output signal when input voltage drops below a preset threshold.
• Utilizes Burst Mode operation to maintain high efficiency across varying load conditions in battery-powered systems.
• Features a shutdown pin that significantly reduces quiescent current consumption for extended battery life.
• Incorporates an on-chip NPN power switch with low saturation voltage to minimize conduction losses.

Applications

• Small, low-voltage battery-operated systems
• Portable electronic devices requiring efficient step-up conversion
• Applications necessitating low-battery detection capabilities

Procurement Notes

Verify the specific suffix and package type against official Analog Devices documentation to ensure compatibility with design requirements. Confirm RoHS compliance status and lead-free availability through authorized distributors or manufacturer channels. Check for any recent product lifecycle changes or obsolescence notices prior to final procurement decisions.

Selection Notes

Select this component for designs requiring a fixed 5V output from low-voltage sources (1.8V–6V) with moderate current demands up to 200mA. Consider the integrated low-battery detector if system monitoring is required without additional components. Evaluate thermal performance within the specified operating temperature range and ensure PCB layout supports the SOIC-8 footprint and heat dissipation needs.

Part Context

The LT1303 series comprises micropower high-efficiency DC/DC converters designed for small, battery-operated systems. The LT1303-5 variant specifically provides a regulated 5V output, while the adjustable LT1303 can supply up to 25V. These devices are part of Analog Devices' portfolio of power management ICs, offering solutions for space-constrained applications where efficiency and low standby current are critical.

Replacement Considerations

For higher output current requirements, consider the LT1305 or LT1302 as documented alternatives within the same family. Verify pinout and functional compatibility before substituting with other boost converters from different manufacturers.