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Product Detailed Parameters
- Description：IC REG BCK SEPIC 1.8V 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)：1.8V
- 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-1.8#PBF is a monolithic buck switching regulator from Analog Devices Inc., operating at a fixed 1.25MHz frequency. It integrates a high-efficiency 1.5A power switch and current-mode control circuitry for fast transient response and loop stability. The device supports an input voltage range of 3V to 25V, delivering a fixed 1.8V output. It features adjustable soft-start functionality and low quiescent current of 6µA in shutdown mode. Packaged in an 8-pin MSOP with exposed pad, it operates within a junction temperature range of -40°C to +125°C.
Feature Summary
- Integrates a high-efficiency 1.5A synchronous switch with complete current-mode control circuitry
- Provides fast transient response and excellent loop stability through fixed-frequency operation
- Features adjustable soft-start capability to limit inrush current during startup
- Supports SEPIC topology configurations for dual-output or inverted supply applications
Applications
- Portable battery-powered equipment requiring efficient step-down conversion
- Dual-output SEPIC converters for generating positive and negative rails
- General-purpose DC-to-DC regulation in industrial systems
- Embedded systems requiring stable 1.8V logic supplies
Procurement Notes
Verify the specific suffix #PBF indicates tube packaging when ordering. Confirm the E variant includes the exposed thermal pad for improved heat dissipation. Ensure compatibility with 8-MSOP footprints including the central pad connection. Cross-reference datasheet revisions for any material declaration updates. Validate that the fixed 1.8V output matches the target design requirements without external adjustment resistors.
Selection Notes
Select this component when a fixed 1.8V output is required from a 3V to 25V input source. The 1.5A current capacity suits moderate load applications. The exposed pad package necessitates PCB thermal management considerations. Current-mode control offers superior line and load regulation compared to voltage-mode alternatives. Verify that the 1.25MHz switching frequency aligns with electromagnetic interference constraints.
Part Context
This part belongs to the LT1767 family of monolithic buck regulators. Variants include adjustable versions like LT1767EMS8E and other fixed outputs such as 2.5V and 3.3V. The EMS8E designation specifies the 8-lead MSOP package with an exposed thermal pad. The #PBF suffix denotes lead-free and RoHS compliance packaging in tubes.
Replacement Considerations
LT1767EMS8E-1.8#TRPBF serves as the tape-and-reel equivalent for automated assembly. LT1767EMS8E provides an adjustable output option if voltage flexibility is needed. LT1767IMS8E offers an industrial temperature grade extension. Direct pin-compatible substitutes require verification of internal switch ratings and control loop characteristics.
