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Product Detailed Parameters
- Description：IC REG BUCK BOOST ADJ 1.5A 8SO
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration：Positive or Negative
- Topology：Buck, Boost, Cuk, Flyback, Forward Converter, SEPIC
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：2.7V
- Voltage - Input (Max)：30V
- Voltage - Output (Min/Fixed)：1.245V
- Voltage - Output (Max)：35V (Switch)
- Current - Output：1.5A (Switch)
- Frequency - Switching：1MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
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Overview
The LT1377IS8#PBF is a monolithic high-frequency switching regulator manufactured by Analog Devices Inc. It operates at switch frequencies of 500kHz and 1MHz, supporting boost, buck, Cuk, flyback, forward, and inverting topologies. The device features an integrated 1.5A power switch and adjustable output voltage. It accepts an input voltage range from 2.7V to 30V with a maximum operating supply current of 4mA. The component is housed in an 8-lead SOIC package and is rated for operation between -40°C and +125°C.
Feature Summary
- Supports multiple standard switching configurations including boost, buck, Cuk, flyback, forward, and inverting topologies
- Integrates a high-efficiency 1.5A power switch with complete oscillator, control, and protection circuitry
- Operates at selectable high frequencies of 500kHz or 1MHz to minimize external passive component size
Applications
- Low ripple DC-to-DC conversion circuits such as 5V to -3V Cuk converters
- Portable battery-powered systems requiring efficient step-up or step-down regulation
- Industrial control systems utilizing various isolated or non-isolated converter topologies
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the IS8 variant corresponds to the industrial temperature grade (-40°C to +125°C) rather than the commercial CS8 grade (0°C to +125°C). Ensure the 8-SOIC package dimensions match the target PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when a single IC must support diverse converter topologies without external power switches. The 1.5A internal switch capability suits moderate load applications. Choose the IS8 version for environments requiring extended temperature ranges. Verify that the required switching frequency aligns with the available 500kHz or 1MHz options to optimize inductor and capacitor selection.
Part Context
This part belongs to the LT1377 series of high-frequency switching regulators. It shares functional similarities with the LT1372 but offers higher switching frequency options. The series is designed for applications needing flexible topology support within a compact surface-mount package, distinguishing it from fixed-function regulators.
Replacement Considerations
LT1377CS8#PBF: Commercial temperature grade alternative (0°C to +125°C). LT1372IS8#PBF: Similar functionality but limited to 500kHz switching frequency.
