LT1243MJ8

LT1243MJ8

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LT1243MJ8
IC OFFLINE SWITCH BUCK 8CERDIP
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Price negotiable

Price update:a months ago
Available in stock: 61
45
Serves customers in 45 countries
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Worldwide Manufacturers
$140M
$140M Growth in 5 Years
50.0M+
50M Parts Shipped in 5 Years
Linear Technology

Linear Technology

Analog Devices (NASDAQ: ADI), a pioneer in intricate design and fabrication of advanced analog, blended-signal, and digital signal processing (DSP) integrated circuits. Since 1965, they've tackled complex signal processing challenges across global electronic domains. Merged with Maxim Integrated, they offer superior mixed-signal and power management technologies, catering to a digitally connected realm. This alliance couples vast engineering acumen and domain mastery, addressing complexities from DC to 100 GHz, spanning sensors to the cloud.

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LT1243MJ8 Products

The LT1241 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. Cross-conduction current spikes in the output stage have been eliminated, making 500kHz operation practical. Several new features have been incorporated. Leading edge blanking has been added to the current sense comparator. Trims have been added to the oscillator circuit for both frequency and sink current, and both of these parameters are tightly specified. The output stage is clamped to a maximum VOUT of 18V in the on state. The output and the reference output are actively pulled low during undervoltage lockout.

Feature

  • 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

Product Attributes

TYPE DESCRIPTION Select all
Supplier Device Package 8-CERDIP
Internal Switch(s) No
Package / Case 8-CDIP (0.300", 7.62mm)
Output Isolation Isolated
Operating Temperature -55°C ~ 125°C (TJ)
Product Status Obsolete
Control Features Frequency Control
Package Tube
Frequency - Switching Up to 500kHz
Duty Cycle 96%
Voltage - Supply (Vcc/Vdd) 7V ~ 25V
Voltage - Start Up 16 V
Topology Buck
Mounting Type Through Hole

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Price negotiable

Price update:a months ago
Available in stock: 61
Linear Technology

Linear Technology

Analog Devices (NASDAQ: ADI), a pioneer in intricate design and fabrication of advanced analog, blended-signal, and digital signal processing (DSP) integrated circuits. Since 1965, they've tackled complex signal processing challenges across global electronic domains. Merged with Maxim Integrated, they offer superior mixed-signal and power management technologies, catering to a digitally connected realm. This alliance couples vast engineering acumen and domain mastery, addressing complexities from DC to 100 GHz, spanning sensors to the cloud.

View All Product from Linear Technology

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