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Part Number: LT1076-5
Description: The LT1076-5 is a 2A fixed 5V output monolithic bipolar switching regulator which requires only a few ...
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LT1076-5
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DataSheet
General Description
LT1076-5 General Description
The LT1076-5 is a 2A fixed 5V output monolithic bipolar switching regulator which requires only a few externalparts for normal operation. The power switch, all oscillator and control circuitry, all current limit components, and an output monitor 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 LT1076-5 to drive a tapped inductor in the buck mode with output currents upto 4A.
The LT1076-5 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instanta- neously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behav- ior of the regulator is significantly improved over previousdesigns. On-chip pulse by pulse current limiting makes the LT1076- 5 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 LT1076-5 is available in a low cost 5-lead TO-220 package with frequency pre-set at 100kHz and current limit at 2.6A. See Application Note 44 for design details.
LT1076-5 Maximum Ratings
Input Voltage
LT1076-5............................................................ 45V
LT1076HV-5........................................................ 64V
Switch Voltage with Respect to Input Voltage
LT1076-5............................................................ 64V
LT1076HV-5........................................................ 75V
Switch Voltage with Respect to Ground Pin
(V Negative)
SW
LT1076-5 (Note 5).............................................. 35V
LT1076HV-5 (Note 5).......................................... 45V
Sense Pin Voltage...................................... 2V, 10V
Maximum Operating Ambient Temperature Range
LT1076C-5, LT1076HVC-5 ................... 0°C to 70°C
LT1076I-5, LT1076HVI-5 ............... 40°C to 85°C
Maximum Operating Junction Temperature Range
LT1076C-5, LT1076HVC-5 ................. 0°C to 125°C
LT1076I-5, LT1076HVI-5 ............. 40°C to 125°C
Maximum Storage Temperature... 65°C to 150°C
Lead Temperature (Soldering, 10 sec)............300°C
LT1076-5............................................................ 45V
LT1076HV-5........................................................ 64V
Switch Voltage with Respect to Input Voltage
LT1076-5............................................................ 64V
LT1076HV-5........................................................ 75V
Switch Voltage with Respect to Ground Pin
(V Negative)
SW
LT1076-5 (Note 5).............................................. 35V
LT1076HV-5 (Note 5).......................................... 45V
Sense Pin Voltage...................................... 2V, 10V
Maximum Operating Ambient Temperature Range
LT1076C-5, LT1076HVC-5 ................... 0°C to 70°C
LT1076I-5, LT1076HVI-5 ............... 40°C to 85°C
Maximum Operating Junction Temperature Range
LT1076C-5, LT1076HVC-5 ................. 0°C to 125°C
LT1076I-5, LT1076HVI-5 ............. 40°C to 125°C
Maximum Storage Temperature... 65°C to 150°C
Lead Temperature (Soldering, 10 sec)............300°C
LT1076-5 Features
Fixed 5V Output
2A On-Board Switch
100kHz Switching Frequency
2% Output Voltage Tolerance Over Temperature
Greatly Improved Dynamic Behavior
Available in Low Cost 5-Lead Package
Only 9.5mA Quiescent Current
Operates Up to 60V Input
2A On-Board Switch
100kHz Switching Frequency
2% Output Voltage Tolerance Over Temperature
Greatly Improved Dynamic Behavior
Available in Low Cost 5-Lead Package
Only 9.5mA Quiescent Current
Operates Up to 60V Input
LT1076-5 Typical Application
5V Output Buck Converter
Tapped Inductor Buck Converter with 4A Output
at 5V
Positive-to-Negative Converter
Tapped Inductor Buck Converter with 4A Output
at 5V
Positive-to-Negative Converter
LT1076-5 Connection Diagram
LT1076-5
PDF/DataSheet Download
- Datasheet: LT1076-5
- File Size: 174335 KB
- Manufacturer: Linear
- Click here to Download
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