LT1243CS8#PBF

$7.39

Description：IC REG CTRLR BUCK 8SOIC
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:eedd047a68f3 Category: DC DC Switching Controllers Brand: Analog Devices Inc.

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 introduction

Product Detailed Parameters

Description：IC REG CTRLR BUCK 8SOIC
Series：-
Mfr：Analog Devices Inc.
Package：Tube
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

LT1243CS8#PBF

Overview

The LT1243CS8#PBF is a high-speed current mode pulse width modulator manufactured by Analog Devices Inc. It operates as a buck switching controller with a fixed frequency of 500 kHz and supports an input voltage range of 8.2 V to 25 V. The device provides a trimmed bandgap reference and features a 1 A totem pole output capable of driving external power switches. It includes undervoltage lockout with hysteresis, active pull-down during lockout, and leading edge blanking for noise immunity. Operating temperatures range from -40°C to +100°C in an 8-pin SOIC package.

Feature Summary

High-speed current mode operation optimized for fast transient response
Integrated 1 A totem pole output driver for direct switch control
Undervoltage lockout with hysteresis and active reference pull-down
Leading edge blanking to suppress switching noise

Applications

Off-line converters
DC/DC step-down converters
Isolated power supply designs

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and lot traceability upon receipt. Check for physical damage to the SOIC-8 package pins. Ensure storage conditions meet moisture sensitivity level requirements before soldering. Review latest datasheet revisions for any pinout or electrical specification updates.

Selection Notes

Select this controller for applications requiring high-frequency current mode regulation up to 500 kHz. It serves as an improved plug-compatible replacement for UC1842 series devices. Consider its low start-up current and wide operating temperature range for industrial environments. Ensure the external components support the 1 A output drive capability and 50 ns current sense delay specifications.

Part Context

The LT1243 is part of the LT1241 series of 8-pin fixed frequency current mode pulse width modulators. These devices are designed as enhanced versions of industry standard controllers, offering improved speed and lower quiescent current. The series is widely used in power management applications where compact size and high efficiency are critical.