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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1.4A DL 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：2
- Voltage - Input (Min)：3.6V
- Voltage - Input (Max)：25V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：22V
- Current - Output：1.4A
- Frequency - Switching：1.1MHz
- Synchronous Rectifier：No
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：16-TSSOP-EP
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Overview
The LT1940EFE#PBF is a dual synchronous buck switching regulator manufactured by Analog Devices Inc. It integrates two independent 1.4A power switches within a TSSOP-EP-16 package. The device operates from an input voltage range of 3.6V to 25V with a fixed switching frequency of 1.1MHz. It provides adjustable output voltages and draws a typical quiescent current of 3.8mA. The component supports operation across a temperature range of -40°C to +85°C.
Feature Summary
- Dual channel architecture providing two independent synchronous buck regulators in a single package
- Integrated high-efficiency power switches rated for 1.4A continuous output per channel
- Fixed 1.1MHz switching frequency enables the use of compact external passive components
Applications
- Portable electronics requiring multiple regulated voltage rails
- Industrial control systems utilizing distributed power architectures
- Embedded computing platforms needing efficient step-down conversion
Procurement Notes
Verify the specific suffix #PBF confirms lead-free and RoHS compliance status before procurement. Confirm the TSSOP-EP-16 package variant matches the target PCB footprint requirements. Ensure the operating environment remains within the specified -40°C to +85°C thermal limits for reliable performance.
Selection Notes
Select this component when a design requires two isolated or shared ground buck converters from a single intermediate bus voltage. The 1.1MHz frequency offers a balance between efficiency and component size. Evaluate thermal dissipation capabilities based on the total load current drawn from both channels simultaneously.
Part Context
This part belongs to the LT1940 series of dual synchronous buck regulators. It serves as a power management solution for applications requiring space-constrained, multi-rail power distribution. The device complements single-channel regulators by offering integrated dual functionality in a compact surface-mount package.
Replacement Considerations
Consult official Analog Devices documentation for verified cross-reference part numbers. Do not substitute with generic equivalents without validating pin compatibility and electrical specifications.
