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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1.2A 10DFN
- 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)：3V
- Voltage - Input (Max)：60V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：59.4V
- Current - Output：1.2A
- Frequency - Switching：300kHz ~ 2.2MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-WFDFN Exposed Pad
- Supplier Device Package：10-DFN (3x3)
- Grade：-
- Qualification：-
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Overview
The LT8619IDD#PBF is a synchronous monolithic buck regulator from Analog Devices, housed in a 10-lead DFN package. It supports an input voltage range of 3V to 60V and delivers up to 1.2A of continuous output current with a quiescent current of only 6µA. The device operates at switching frequencies between 300kHz and 2.2MHz and features Burst Mode operation for high efficiency at light loads while maintaining low output ripple below 10mV P-P. Internal compensation allows the use of small inductors, ensuring stability and fast transient response.
Feature Summary
- Integrated synchronous buck topology with internal upper and lower switches minimizes external component requirements.
- Burst Mode operation ensures high efficiency at very low output currents while maintaining low output ripple.
- Internal peak current mode compensation enables the use of small inductors for stable loop performance.
- Programmable forced continuous mode synchronization via an external clock pin reduces electromagnetic interference.
Applications
- 12V, 24V, and 48V automotive power systems
- Hybrid and electric vehicle electronics
- Commercial industrial equipment power distribution
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence when sourcing. Confirm the package type matches the design footprint requirements. Ensure the operating temperature range aligns with the intended application environment. Cross-reference the datasheet revision to confirm feature consistency.
Selection Notes
Select this component for applications requiring wide input voltage ranges up to 60V and compact form factors. It is suitable for designs needing low quiescent current to preserve battery life. Consider the thermal performance of the DFN package for high-current scenarios. Evaluate the need for external synchronization if EMI constraints are strict.
Part Context
This part belongs to the LT8619 series of Power by Linear synchronous buck regulators. The series offers various package options including MSOP and DFN variants. These devices are designed for high-efficiency power conversion in demanding environments. The family shares core architectural features but differs in pin counts and thermal characteristics.
Replacement Considerations
LT8619IMSE#PBF
FAQ
How does the LT8619 maintain low output ripple?
It utilizes Burst Mode operation which maintains output ripple below 10mV P-P even at very low output currents.
What is the purpose of the EN/UV pin?
The EN/UV pin provides precise 1V threshold for enabling the device or programming undervoltage lockout, reducing supply current to less than 0.6µA when disabled.
