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Product Detailed Parameters
- Description：IC REG BUCK ADJ 2A 10MSOP
- 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)：3.6V
- Voltage - Input (Max)：34V
- Voltage - Output (Min/Fixed)：1.265V
- Voltage - Output (Max)：20V
- Current - Output：2A
- Frequency - Switching：300kHz ~ 2.8MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：10-MSOP-EP
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Overview
The LT3481HMSE#PBF is a high-efficiency step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.6V to 36V and delivers up to 2A of output current. The device integrates a 2.8MHz fixed-frequency switching controller, enabling the use of small external components. It features a low quiescent current of 50µA for improved efficiency in light-load conditions. The component is housed in a thermally enhanced MSOP-10 package and supports adjustable output voltages from 0.79V to 20V.
Feature Summary
- Integrates a 2.8MHz fixed-frequency PWM controller for compact passive component sizing
- Features ultra-low 50µA quiescent current to maintain efficiency under light loads
- Includes internal compensation and frequency compensation for stable operation
- Supports wide input voltage range suitable for various power supply architectures
Applications
- Point-of-load regulation in industrial equipment
- Battery-powered portable devices requiring extended runtime
- Embedded systems with strict size constraints
- Automotive electronics operating within specified voltage limits
Procurement Notes
Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the HMSE variant corresponds to the commercial temperature range specifications. Ensure compatibility with the intended thermal management solution given the MSOP-10 package type. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions or pin configurations before finalizing procurement.
Selection Notes
Select this component when a fixed high switching frequency is preferred over adjustable options to minimize board space. It is suitable for applications requiring moderate output currents up to 2A without external pass transistors. Consider the thermal performance requirements of the MSOP-10 package for the expected load conditions. Compare against the LT3480 if a lower switching frequency is acceptable for different EMI profiles.
Part Context
This part belongs to the LT3480/LT3481 family of micropower switching regulators designed for space-constrained applications. Unlike the LT3480 which operates at 2.4MHz, the LT3481 utilizes a 2.8MHz frequency. Both share similar architectural features but differ in switching speed and quiescent current characteristics, allowing designers to choose based on efficiency versus size trade-offs.
Replacement Considerations
LT3480IMSE#PBF offers similar functionality with a 2.4MHz switching frequency. LT3481IMSE#PBF provides the same electrical performance in a tube package instead of reel. Verify thermal dissipation capabilities remain adequate when substituting between these variants.
