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Product Detailed Parameters
- Description：IC REG TRIPLE BUCK/LINEAR 28QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Topology：Step-Down (Buck) (1), Linear (LDO) (2)
- Number of Outputs：3
- Frequency - Switching：250kHz ~ 2.5MHz
- Voltage/Current - Output 1：0.75V ~ 16V, 2.6A
- Voltage/Current - Output 2：Controller
- Voltage/Current - Output 3：Controller
- w/LED Driver：No
- w/Supervisor：No
- w/Sequencer：Yes
- Voltage - Supply：4V ~ 36V
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：28-WFQFN Exposed Pad
- Supplier Device Package：28-QFN (4x5)
- Grade：-
- Qualification：-
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Overview
The LT3694IUFD#PBF is a monolithic power management IC featuring one synchronous buck regulator and two low-dropout linear regulators. It accepts input voltages from 4V to 36V. The switching regulator delivers up to 2.6A with an adjustable output voltage range of 0.75V to 16V. Switching frequency is programmable between 250kHz and 2.5MHz. The device operates within a temperature range of -40°C to 125°C and is housed in a 28-lead QFN package.
Feature Summary
- Integrates a high-efficiency synchronous buck converter with two independent LDOs for combined switching and linear regulation.
- Features a wide input voltage range suitable for various industrial and automotive power distribution architectures.
- Includes internal soft-start circuitry to limit inrush current during startup sequences.
Applications
- Industrial equipment requiring mixed switching and linear power rails
- Automotive infotainment and control systems
- Distributed power supply architectures
Procurement Notes
Verify the specific suffix IUFD#PBF against official Analog Devices documentation to confirm the industrial temperature grade and tube packaging configuration. Ensure compatibility with the target PCB footprint, as the component utilizes a 28-QFN package with an exposed thermal pad that requires proper soldering techniques for reliable operation.
Selection Notes
Select this component when a design requires a single solution for both high-current switching regulation and low-noise linear outputs. The integrated topology reduces board space compared to discrete solutions. Verify that the required output currents for the LDOs do not exceed their specified limits under maximum ambient temperatures.
Part Context
This part belongs to the LT3694 family of triple-output power management ICs. Variants such as the LT3694EUFD#PBF offer extended commercial temperature ranges, while other suffixes may indicate different packaging or testing configurations. The device consolidates multiple power stages into a compact form factor.
Replacement Considerations
LT3694EUFD#PBF serves as a parameter-equivalent alternative with a commercial temperature rating. LT3694IUFD-1#PBF is another variant within the same series. Confirm pinout and electrical specifications match before substitution.
