ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG CTRLR BUCK 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive, Isolation Capable
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：8.2V ~ 25V
- Frequency - Switching：500kHz
- Duty Cycle (Max)：96%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Frequency Control
- Operating Temperature：0°C ~ 100°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
- Grade：-
- Qualification：-
Download product information
Overview
The LT1243CS8#TRPBF is an 8-pin, fixed frequency, current mode pulse width modulator from Analog Devices Inc. It serves as an improved plug-compatible version of the UC1842 series. Key electrical parameters include a low start-up current of less than 250µA and a 50ns current sense delay. The device supports switching frequencies up to 500kHz and features undervoltage lockout with hysteresis. It includes a trimmed bandgap reference and a 1A totem pole output capable of driving external MOSFETs.
Feature Summary
- High-speed current mode operation optimized for fast transient response
- Low quiescent current design enhances efficiency in standby modes
- Integrated undervoltage lockout ensures reliable startup sequencing
- Totem pole output stage provides robust gate drive capability
Applications
- Off-line converters
- DC/DC step-down converters
- Isolated power supply designs
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the manufacturer designation remains Analog Devices Inc., reflecting the acquisition of Linear Technology. Ensure compliance with RoHS standards by checking the latest datasheet documentation provided by the supplier. Cross-reference the Mouser part number 584-LT1243CS8#TRPBF for accurate inventory tracking and availability status updates.
Selection Notes
Select this component for applications requiring high-frequency current mode control with minimal start-up current consumption. The device is suitable for designs needing a direct replacement for UC1842-based circuits with enhanced speed characteristics. Consider the 8-SOIC package constraints for PCB layout and thermal management requirements in dense assemblies.
Part Context
This part belongs to the LT1241 series of high-speed current mode pulse width modulators. It shares architectural similarities with industry-standard UC1842 devices but offers improved performance metrics such as lower quiescent current and faster current sense delays. The series is designed for versatile use in both offline and DC/DC converter topologies.
Replacement Considerations
The LT1243 is functionally compatible with the UC1842 series. Designers may consider the LT1241IN8#PBF or LT1243IN8#PBF for through-hole alternatives if surface mount options are unavailable.
