LT1243 - Linear Technology

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

LT1243
Manufacturer

Linear Technology
ChipWorker Part#

CW543627009
RoHS

Lead free / RoHS Compliant
Description

High Speed Current Mode Pulse Width Modulators
Documentation

Datasheet

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LT1243 Specifications

Attribute	Attribute Value

Part Number	LT1243
Manufacturer	Linear Technology
ChipWorker Part#	CW543627009
Documentation	Datasheet
Mounting Style	Surface Mount
Case/Package	SOP-8
	expand all
RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product Description

DESCRIPTION
The LT®1241 series devices are 8-pin, fixed frequency, current mode, pulse width modulators. They are improved plug compatible versions of the industry standard UC1842 series. These devices have both improved speed and lower quiescent current. The LT1241 series is optimized for off-line and DC/DC converter applications. They contain a temperature-compensated reference, high gain error amplifier, current sensing comparator and a high current totem pole output stage ideally suited to driving power MOSFETs. Start-up current has been reduced to less than 250µA.
FEATURES
■ Low Start-Up Current: < 250µA
■ 50ns Current Sense Delay
■ Current Mode Operation: To 500kHz
■ Pin Compatible with UC1842 Series
■ Undervoltage Lockout with Hysteresis
■ No Cross-Conduction Current
■ Trimmed Bandgap Reference
■ 1A Totem Pole Output
■ Trimmed Oscillator Frequency and Sink Current
■ Active Pull-Down on Reference and Output During Undervoltage Lockout
■ High Level Output Clamp: 18V
■ Current Sense Leading Edge Blanking
APPLICATIONS
■ Off-Line Converters
■ DC/DC Converters

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- Carefully tested and packaged by ChipWorker
- Vacuum packed
- Anti-static packaging
- Anti-vibration foam
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- Surface testing

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