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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1.1A/1.3A 28QFN
- 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)：2.5V
- Voltage - Input (Max)：35V
- Voltage - Output (Min/Fixed)：0.6V, 1.265V
- Voltage - Output (Max)：33.97V
- Current - Output：1.1A, 1.3A
- Frequency - Switching：500kHz ~ 2MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-WFQFN Exposed Pad
- Supplier Device Package：28-QFN (4x5)
- Grade：-
- Qualification：-
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Overview
The LT3640EUFD#PBF is a dual monolithic buck regulator from Analog Devices, housed in a QFN-28 package. It operates with an input voltage range of 4 V to 35 V and delivers up to 1.3 A output current per channel. The device features a fixed 2.5 MHz switching frequency and supports adjustable output voltages up to 33.97 V. Quiescent current is specified at 275 uA, and it functions within a temperature range of -40°C to +125°C.
Feature Summary
- Integrates two independent synchronous step-down converters in a single compact package
- Includes integrated power-on reset generator and watchdog timer for system protection
- Supports shutdown mode to minimize standby power consumption
Applications
- Industrial control systems requiring dual isolated rails
- Telecommunications infrastructure equipment
- Embedded computing platforms needing multiple regulated supplies
Procurement Notes
Verify the specific suffix 'EUFD' against official Analog Devices documentation to confirm the industrial temperature grade (-40°C to +125°C) and lead-free packaging status. Ensure compatibility with the target PCB footprint for the QFN-28 package before finalizing procurement orders.
Selection Notes
Select this component when designing circuits that require two synchronized or independent buck outputs from a single high-voltage rail. The integrated reset and watchdog features reduce external component count compared to using separate regulators with discrete monitoring ICs.
Part Context
This part belongs to the LT3640 series of dual monolithic buck regulators. It is designed to simplify power management in space-constrained applications by combining two complete DC/DC converters with advanced monitoring features into one integrated circuit solution.
Replacement Considerations
Consult official substitution guides for pin-compatible alternatives within the Analog Devices portfolio. Verify thermal performance and electrical specifications match the original design requirements before considering any cross-reference parts.
