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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 16-DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：2.2V ~ 22V
- Frequency - Switching：300kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Enable, Power Good
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-WFDFN Exposed Pad
- Supplier Device Package：16-DFN (5x3)
- Grade：-
- Qualification：-
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Overview
The LT3740EDHC#PBF is a synchronous step-down switching regulator controller from Analog Devices Inc. It drives N-channel power MOSFET stages using valley current mode architecture. The device operates with a supply voltage range of 2.2V to 22V and features a fixed switching frequency of 300kHz. It provides one output phase and includes integrated synchronous rectification capabilities.
Feature Summary
- Valley current mode architecture for improved transient response
- Integrated synchronous rectifier control eliminating external sense resistors
- Wide input voltage operating range supporting diverse power sources
Applications
- Industrial point-of-load regulation
- Telecommunications power distribution
- Embedded system DC-DC conversion
Procurement Notes
Verify the complete part number including suffixes such as #PBF for lead-free compliance and package type (16DFN). Confirm that the specific revision matches your design requirements. Cross-reference with official Analog Devices documentation to ensure compatibility with your PCB layout and thermal management strategy before finalizing procurement orders.
Selection Notes
Select this component when designing non-isolated buck converters requiring high efficiency without current sense resistors. The valley mode operation suits applications needing stable performance under varying load conditions. Ensure the external MOSFETs are rated for the expected voltage and current stresses at the 300kHz switching frequency.
Part Context
This controller belongs to the LT3740 family of wide operating range synchronous step-down controllers. It is designed to replace traditional PWM controllers by integrating the low-side drive, reducing component count and board space. The EDHC package offers thermal performance suitable for moderate power applications in compact form factors.
Replacement Considerations
Direct substitutes include other Analog Devices valley-mode buck controllers like the LT3745 or LT3746, which offer similar functionality but may differ in input voltage range or switching frequency. Verify pinout compatibility and control loop stability when transitioning between these variants.
