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Product Detailed Parameters
- Description：IC REG BUCK ADJ QUAD 40QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck-Boost
- Number of Outputs：4
- Output Phases：2
- Voltage - Supply (Vcc/Vdd)：3V ~ 42V
- Frequency - Switching：250kHz ~ 2.2MHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Current Limit, Power Good, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：40-WFQFN Exposed Pad
- Supplier Device Package：40-QFN (6x6)
- Grade：-
- Qualification：-
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Overview
The LT8603IUJ#PBF is a quad-output regulator from Analog Devices Inc. featuring two high-input monolithic buck converters, one low-input buck converter, and a boost controller. It operates with an input voltage range of 2.6 V to 42 V. Output currents are rated at 1.5 A, 1.8 A, and 2.5 A. The maximum output voltage is 8 V, adjustable from 1.2 V. Quiescent current is 100 nA. Operating temperature spans -40°C to +125°C. The device is housed in a 40-QFN (6x6) package.
Feature Summary
- Combines multiple regulator topologies including high and low input voltage buck converters and a boost controller within a single chip.
- Provides four independent output channels for flexible power distribution.
- Features ultra-low quiescent current capability for efficient standby operation.
Applications
- Industrial systems requiring multi-rail power supplies
- Distributed power architectures
- Battery-powered equipment with varying input requirements
Procurement Notes
Verify the specific suffix PBF confirms lead-free compliance and RoHS standards before ordering. Confirm the QFN-40 package dimensions match your PCB footprint design. Ensure the operating voltage range aligns with your system's supply rails. Check for moisture sensitivity level requirements during storage and handling. Validate that the thermal performance meets your enclosure constraints.
Selection Notes
Select this component when a single IC must replace multiple discrete regulators to save board space. It is suitable for designs needing both high-voltage step-down and boost functionality. Consider the 100 nA quiescent current if battery life is critical. Verify that the 42 V maximum input rating exceeds your peak supply voltage. Ensure the 40-QFN package is compatible with your assembly process.
Part Context
The LT8603 belongs to Analog Devices' specialized PMIC family designed for complex power management needs. It integrates three mono-buck converters and one boost controller into one package. This integration reduces component count compared to using separate chips for each function. The series targets applications requiring high flexibility and compact form factors.
Replacement Considerations
LT8603EUJ#PBF is a verified alternative variant within the same product line. Both share the core quad-output architecture and similar electrical specifications. Verify pin compatibility and thermal characteristics when substituting between these specific part numbers.
