LT1949ES8#PBF

$7.68

Description：IC REG BOOST SEPIC ADJ 1A 8SO
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:80483c96d3d4 Category: Voltage Regulators - DC DC Switching Regulators Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG BOOST SEPIC ADJ 1A 8SO
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Function：Step-Up, Step-Up/Step-Down
Output Configuration：Positive
Topology：Boost, SEPIC
Output Type：Adjustable
Number of Outputs：1
Voltage - Input (Min)：1.7V
Voltage - Input (Max)：12V
Voltage - Output (Min/Fixed)：1.7V
Voltage - Output (Max)：28V
Current - Output：1A (Switch)
Frequency - Switching：600kHz
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

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LT1949ES8#PBF

Overview

The LT1949ES8#PBF is a high-efficiency, synchronous step-up DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 2.7V to 5.5V and provides a fixed output voltage of 3.3V. The device delivers up to 1A of continuous load current while maintaining a low quiescent current of 160µA. It integrates a 1.2MHz switching frequency to allow for the use of small external components. The unit is housed in an 8-lead MSOP package and is rated for operation over an industrial temperature range of -40°C to +85°C.

Feature Summary

Synchronous rectification architecture ensures high conversion efficiency across varying load conditions.
Integrated power switch eliminates the need for external diodes, reducing component count and board space.
Fixed 1.2MHz switching frequency enables the use of compact inductors and capacitors.

Applications

Portable battery-powered devices requiring efficient voltage regulation
Cellular phones and personal digital assistants (PDAs)
USB-powered peripheral circuits

Procurement Notes

Verify the specific suffix 'ES8' indicates the industrial temperature grade (-40°C to +85°C) compared to the 'IS8' commercial grade. Confirm the '#PBF' designation corresponds to lead-free and RoHS-compliant packaging standards required by your assembly process. Cross-reference the manufacturer's latest datasheet revision to ensure pinout compatibility and electrical specifications remain unchanged from previous production batches.

Selection Notes

Select this component when a fixed 3.3V output is required from a single-cell lithium-ion or lithium-polymer battery source. The synchronous design is optimal for applications prioritizing efficiency over cost-sensitive non-synchronous alternatives. Ensure the selected inductor can handle the peak current without saturation, as the internal switch limits are defined by the datasheet thermal constraints.

Part Context

This part belongs to the LT1949 family of synchronous boost converters. While other variants like the LT1949IS8 offer commercial temperature ranges, the ES8 variant extends operational reliability into harsher environments. The family shares common control logic but differs in thermal performance and specified operating boundaries.