Conv DC-DC 7.3V to 64V Step Down Single-Out 2.5V to 50V 10A 5-Pin(5+Tab) TO-220 Tube
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LT1074HVIT#PBF Product Details
The LT1074 is a 5A (LT1076 is rated at 2A) monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, and all current limit components,are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1074 to drive a tapped-inductor in the buck mode with output currents up to 10A.
The LT1074 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instantaneously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behavior of the regulator is significantly improved over previous designs.
On-chip pulse by pulse current limiting makes the LT1074 nearly bust-proof for output overloads or shorts. The input voltage range as a buck converter is 8V to 60V, but a self-boot feature allows input voltages as low as 5V in the inverting and boost configurations.
The LT1074 is available in lowcost TO-220 or DD packages with frequency pre-set at 100kHz and current limit at 6.5A (LT1076 =2.6A). A 7-pin TO-220 package is also available which allows current limit to be adjusted down to zero. In addition, full micropower shutdown can be programmed. See Application Note 44 for design details.
A fixed 5V output, 2A version is also available. See LT1076-5.
- 5A Onboard Switch (LT1074)
- Operates Up to 60V Input
- 100kHz Switching Frequency
- Greatly Improved Dynamic Behavior
- Available in Low Cost 5 and 7-Lead Packages
- Only 8.5mA Quiescent Current
- Programmable Current Limit
- Micropower Shutdown Mode
- Buck Converter with Output Voltage Range of 2.5V to 50V
- Tapped-Inductor Buck Converter with 10A Output at 5V
- Positive-to-Negative Converter
- Negative Boost Converter
- Multiple Output Buck Converter
- Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration
- Positive or Negative
- Buck, Boost, Flyback
- Output Type
- Number of Outputs
- Voltage Input (Min)
- Voltage Input (Max)
- Voltage Output (Min/Fixed)
- Voltage Output (Max)
- Current Output
- 5.5A (Switch)
- Frequency Switching
- Synchronous Rectifier
- Operating Temperature
- -40??C ~ 125??C
- Mounting Type
- Through Hole
- Package / Case
- TO-220-5 Formed Leads
- Supplier Device Package
LT1074HV Technical Documentation/Data sheet
LT1074HVIT#PBF Related Products
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