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Product Detailed Parameters
- Description：IC REG BST CHARGE PUMP ADJ 20QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up, Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Boost, Charge Pump, Flyback, SEPIC
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：1V
- Voltage - Input (Max)：60V
- Voltage - Output (Min/Fixed)：1.202V
- Voltage - Output (Max)：70V (Switch)
- Current - Output：2A
- Frequency - Switching：250kHz ~ 1.5MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-WFQFN Exposed Pad
- Supplier Device Package：20-QFN (4x4)
- Grade：-
- Qualification：-
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Overview
The LT8494IUF#PBF is a monolithic DC/DC converter featuring an integrated 2A, 70V switch. It supports Boost and SEPIC topologies with an input voltage range of 1V to 32V and an adjustable output voltage from 1.202V to 70V. The device operates at a fixed switching frequency of 1.5MHz and includes a low quiescent current of 7µA. It is housed in a 20-lead TSSOP package with an exposed pad and is rated for automotive applications within a temperature range of -40°C to +125°C.
Feature Summary
- Integrated high-voltage 70V power switch capable of delivering up to 2A output current
- Supports both Boost and SEPIC conversion topologies for flexible input-output configurations
- Ultra-low quiescent current consumption enhances efficiency in battery-powered systems
- Automotive-grade qualification ensures reliability under harsh environmental conditions
Applications
- Automotive infotainment and lighting systems requiring wide input voltage ranges
- Battery-powered industrial equipment needing efficient step-up conversion
- Sensor interfaces operating from single-cell lithium-ion or alkaline sources
- Portable medical devices utilizing low-power boost regulation
Procurement Notes
Verify the specific suffix 'IUF' against official Analog Devices documentation to confirm package type and tape/reel specifications. Ensure the component meets required automotive standards if used in vehicle electronics. Cross-reference the datasheet revision date to validate parameter accuracy before integration into final designs.
Selection Notes
Select this component when designing circuits that require a compact solution for boosting low input voltages to higher levels. The 1.5MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the thermal performance of the TSSOP-EP package for heat dissipation requirements in enclosed spaces.
Part Context
This part belongs to the LT8494 family of high-voltage DC/DC converters designed by Analog Devices. It shares functional similarities with other members like the LT8494EFE but differs in packaging and shipping configuration. The family targets applications demanding high efficiency and small footprint in power-constrained environments.
Replacement Considerations
LT8494IFE#PBF serves as a tube-packaged alternative within the same series. Verify pinout compatibility and thermal characteristics when substituting between different package variants of the LT8494 family.
