LT1109CS8-5#PBF

$3.82

Description：IC REG BOOST 5V 1.2A 8SO
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:885b382afb6d Category: Voltage Regulators - DC DC Switching Regulators Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG BOOST 5V 1.2A 8SO
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Function：Step-Up
Output Configuration：Positive
Topology：Boost
Output Type：Fixed
Number of Outputs：1
Voltage - Input (Min)：3V
Voltage - Input (Max)：20V
Voltage - Output (Min/Fixed)：5V
Voltage - Output (Max)：-
Current - Output：1.2A (Switch)
Frequency - Switching：120kHz
Synchronous Rectifier：No
Operating Temperature：0°C ~ 70°C (TA)
Mounting Type：Surface Mount
Package / Case：8-SOIC (0.154", 3.90mm Width)
Supplier Device Package：8-SO
Grade：-
Qualification：-

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LT1109CS8-5#PBF

Overview

The LT1109CS8-5#PBF is a micropower low-cost DC/DC converter manufactured by Analog Devices Inc. It utilizes a boost topology to step up input voltages ranging from 1.6 V to 20 V. The device provides a fixed 5 V output capable of delivering up to 1 A of current. Operating with a switching frequency of 120 kHz, it features a quiescent current of 32 uA and a shutdown mode for power conservation. Packaged in an SOIC-8 format, it operates within a temperature range of 0°C to +70°C.

Feature Summary

Integrates a complete boost DC/DC converter requiring only three external components
Supports wide input voltage range suitable for single-cell battery applications
Includes shutdown functionality to minimize standby power consumption

Applications

Flash memory VPP generator circuits
Battery-powered portable instrumentation
General-purpose step-up conversion for microprocessor systems

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm the SOIC-8 package variant matches your PCB footprint requirements. Ensure the fixed 5V output aligns with system design needs as adjustable variants exist within the series. Cross-reference the manufacturer part number with official Analog Devices documentation to avoid counterfeit components.

Selection Notes

Select this component when a simple, cost-effective boost solution is required for moderate current loads. The fixed 5V output eliminates the need for external feedback resistors, simplifying board layout. Consider the 120 kHz switching frequency for EMI constraints and the 1A output capability against load demands. Evaluate the 32 uA quiescent current impact on overall battery life in sleep modes.

Part Context

This part belongs to the LT1109 series of micropower DC/DC converters designed for low-cost, high-efficiency applications. It is distinct from buck converters like the LTC1475 or other regulators in the Analog Devices portfolio. The CS8-5#PBF designation specifies the commercial temperature grade, SOIC-8 package, and fixed 5V output configuration.