ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
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：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
Download product information
Overview
The LT1949IS8#PBF is a monolithic synchronous step-up DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 2.7V to 60V and delivers up to 1A output current. The device integrates a high-efficiency synchronous rectifier and supports boost, SEPIC, or inverting topologies. It features a fixed 1.1MHz switching frequency, adjustable soft-start, and thermal shutdown protection. Packaged in an 8-lead MSOP, it offers a compact solution for battery-powered applications requiring wide input voltage flexibility.
Feature Summary
- Integrates a high-efficiency synchronous rectifier for improved power conversion efficiency across various load conditions.
- Supports multiple topology configurations including boost, SEPIC, and inverting architectures within a single component.
- Features integrated thermal shutdown protection to safeguard the device during overload or excessive temperature events.
Applications
- Battery-powered portable equipment requiring wide input voltage ranges
- Industrial control systems utilizing SEPIC configurations for unstable input sources
- Inverting power supply designs for analog signal processing circuits
Procurement Notes
Verify the specific suffix 'IS8' indicates the industrial temperature grade variant (-40°C to +85°C) compared to the commercial 'CS8' version. Confirm the '#PBF' designation ensures lead-free packaging compliance with RoHS standards. Cross-reference the manufacturer's latest datasheet to ensure no recent design changes affect pin compatibility or electrical specifications before finalizing procurement orders.
Selection Notes
Select this component when a wide input voltage range up to 60V is required alongside high efficiency. The synchronous design reduces external component count compared to non-synchronous alternatives. Ensure the application demands a fixed 1.1MHz frequency for optimal inductor size. Verify that the MSOP package thermal performance meets the system's heat dissipation requirements under maximum load conditions.
Part Context
This part belongs to the LT1949 family of synchronous step-up converters from Analog Devices. It shares core architecture with variants like LT1949EMS8 but differs in temperature rating and packaging. The family is designed for applications needing robust performance from low input voltages up to high output levels without external Schottky diodes.
Replacement Considerations
LT1949EMS8#PBF: Commercial temperature grade variant (0°C to 70°C). LT1949CS8#PBF: Commercial grade with SOIC-8 package. Direct substitution requires verifying temperature range suitability and package footprint compatibility.
