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Product Detailed Parameters
- Description：IC REG BCK SEPIC 3.3V 1.5A 8MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck, SEPIC
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：25V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：1.5A
- Frequency - Switching：1.25MHz
- Synchronous Rectifier：No
- Operating Temperature：0°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Supplier Device Package：8-MSOP-EP
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Overview
The LT1767EMS8E-3.3#PBF is a monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. It integrates a high-efficiency 1.5A power switch and complete current-mode control circuitry into an 8-pin MSOP package with an exposed pad. The device operates at a fixed switching frequency of 1.25MHz, supporting input voltages from 3V to 25V while delivering a fixed 3.3V output. It supports both Buck and SEPIC topologies, ensuring stable operation across a junction temperature range of 0°C to 125°C.
Feature Summary
- Integrates a high-efficiency 1.5A synchronous power switch for compact design
- Utilizes current-mode control architecture for fast transient response and loop stability
- Supports flexible topology configurations including Buck and SEPIC applications
Applications
- Portable battery-powered equipment requiring efficient voltage regulation
- Industrial systems utilizing SEPIC topology for wide input voltage ranges
- General-purpose DC-to-DC conversion in space-constrained designs
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and tube packaging when sourcing. Confirm the 8-MSOP-EP package dimensions match your PCB footprint requirements. Ensure the fixed 3.3V output variant aligns with system voltage rails. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.
Selection Notes
Select this component when a fixed 3.3V output is required with up to 1.5A load capability. The integrated synchronous switch eliminates external diode selection. Current-mode control simplifies compensation network design compared to voltage-mode alternatives. Consider the 1.25MHz frequency for balancing component size against switching losses.
Part Context
This part belongs to the LT1767 family of monolithic buck switching regulators. Variants within the series differ primarily by fixed output voltage options such as 1.8V, 2.5V, and 5V. All members share the same core architecture, 1.5A switch rating, and 1.25MHz switching frequency, differing only in internal feedback resistor networks.
Replacement Considerations
Direct pin-compatible replacements within the same family include LT1767EMS8E-1.8#PBF, LT1767EMS8E-2.5#PBF, and LT1767EMS8E-5#PBF. These parts share identical electrical characteristics and package outlines but provide different fixed output voltages.
