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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1A 20TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：100V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：60V
- Current - Output：1A
- Frequency - Switching：100kHz ~ 1MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad
- Supplier Device Package：20-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT8631EFE#PBF is a current mode PWM step-down DC/DC converter manufactured by Analog Devices Inc. It features internal synchronous switches capable of delivering up to 1A of output current. The device supports a wide input voltage range from 3V to 100V, making it suitable for regulating power from various sources including automotive and industrial systems. The switching frequency is adjustable between 100kHz and 1MHz. It provides a single positive adjustable output ranging from 0.8V to 60V. The component is housed in a 20-TSSOP package with an exposed pad and operates within a temperature range of -40°C to 125°C.
Feature Summary
- Integrates internal synchronous switches for efficient buck conversion
- Supports wide input voltage range from 3V to 100V
- Features adjustable switching frequency from 100kHz to 1MHz
- Provides single positive adjustable output voltage
Applications
- Automotive systems power regulation
- Industrial system power supplies
- Telecom power supplies (36V to 72V)
Procurement Notes
Verify the specific suffix #PBF indicates lead-free tape and reel packaging when ordering. Confirm the 20-TSSOP-EP package dimensions match the PCB footprint requirements. Ensure the design accounts for the thermal performance of the exposed pad for adequate heat dissipation under maximum load conditions. Cross-reference the manufacturer part number LT8631EFE#PBF with official Analog Devices documentation to ensure correct revision and availability status before finalizing procurement.
Selection Notes
Select this component when a high-voltage input range up to 100V is required for buck conversion. It is appropriate for designs needing a single adjustable output up to 60V with up to 1A current capability. Consider the adjustable switching frequency feature for optimizing EMI or transient response. The wide operating temperature range makes it suitable for harsh environments typical in automotive and industrial applications where standard commercial grade parts may fail.
Part Context
The LT8631EFE#PBF belongs to the LT8631 family of high voltage synchronous step-down regulators. This family is designed to handle wide input ranges, distinguishing it from lower voltage buck converters. The EFE suffix typically denotes a specific temperature grade and package variant within the series. Other variants like LT8631HFE offer different switching frequencies but share the core topology and input/output capabilities.
Replacement Considerations
Direct substitutes within the same family include LT8631HFE, which offers a 1MHz fixed switching frequency option. Designers should verify if the fixed frequency of the replacement meets their EMI and transient requirements compared to the adjustable frequency of the EFE variant. Package compatibility must be confirmed as both use the 20-TSSOP-EP form factor.
