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Product Detailed Parameters
- Description：IC REG BST CHRG PUMP ADJ 20TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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 ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：20-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT8494HFE#TRPBF is a monolithic switching regulator from Analog Devices, designed for high-voltage applications. It supports SEPIC, boost, and flyback topologies with an input voltage range of 1V to 32V and an adjustable output up to 70V. The device features a wide adjustable switching frequency from 250kHz to 1.5MHz and operates with a quiescent current of less than 7µA. It is housed in a 20-lead TSSOP package with an exposed pad and is rated for automotive-grade operation within a temperature range of -40°C to +125°C.
Feature Summary
- Supports multiple converter topologies including SEPIC, boost, and flyback configurations.
- Features low quiescent current consumption for improved efficiency in standby modes.
- Incorporates an internal charge pump switch to enable high-voltage operation.
- Offers flexible switching frequency adjustment to optimize external component size.
Applications
- Automotive power systems requiring wide input voltage ranges
- Battery-powered equipment needing efficient step-up conversion
- Industrial control systems utilizing SEPIC or flyback architectures
Procurement Notes
Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm that the HFE variant meets the required automotive qualification standards for your application environment. Ensure compatibility with the 20-lead TSSOP EP footprint during PCB layout planning. Cross-reference the datasheet for thermal performance requirements under maximum load conditions.
Selection Notes
Select this component when designing circuits that require handling input voltages as low as 1V while stepping up to outputs near 70V. The adjustable frequency allows optimization for specific inductor sizes and ripple current constraints. Consider the exposed pad for thermal management if operating at higher currents. Verify that the 2A switch current rating aligns with the peak inductor current requirements of the chosen topology.
Part Context
This part belongs to the LT8494 family of high-voltage DC/DC converters. It shares architectural similarities with other Analog Devices regulators but is distinct in its ability to handle extreme voltage differentials using a single inductor in SEPIC mode. The HFE designation typically denotes automotive-grade reliability and extended temperature performance compared to standard commercial variants.
Replacement Considerations
Direct substitutes include the LT8494IFE#TRPBF for non-automotive versions or LT8494EFE#TRPBF for alternative packaging. Verify pinout compatibility and thermal characteristics before swapping. No other direct cross-brand replacements are confirmed in public documentation without extensive redesign.
