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LT1072HV

Features: • Wide Supply-Voltage Range:LT1072HV . . . 3 V to 60 V LT1072 . . . 3 V to 40 V• Low Quiescent Current . . . 6 mA Typ• Internal 1.25-A Switch• Few External Parts Required• Self-Protected Against Overloads• Operates in Most Switching Configurations̶...

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SeekIC No. : 004400264 Detail

LT1072HV: Features: • Wide Supply-Voltage Range:LT1072HV . . . 3 V to 60 V LT1072 . . . 3 V to 40 V• Low Quiescent Current . . . 6 mA Typ• Internal 1.25-A Switch• Few External Parts Re...

LT1072HV Data Sheet

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Part Number:
LT1072HV
Supply Ability:
5000

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  • 1~5000
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  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• Wide Supply-Voltage Range:
  LT1072HV . . . 3 V to 60 V
  LT1072 . . . 3 V to 40 V
• Low Quiescent Current . . . 6 mA Typ
• Internal 1.25-A Switch
• Few External Parts Required
• Self-Protected Against Overloads
• Operates in Most Switching Configurations
• Low Shutdown-Mode Supply Current
• Floating Outputs in Flyback-Regulated Mode
• Can Be Externally Synchronized


Pinout

Connection Diagram


Specifications

Supply voltage, VI(IN) (see Note 1): LT1072 . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . 40 V
LT1072HV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 V
Switch output voltage: LT1072 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 V
LT1072HV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 V
Feedback input voltage, V(FB) (transient, 1 ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . ±15 V
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . .See Dissipation Rating Tables 1 and 2
Operating virtual-junction temperature range, TJ: LT1072C, LT1072HVC . . . . .. . 0°C to 125°C
LT1072I, LT1072HVI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to 125°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: Minimum switch-on time for the LT1072 in current limit is 9 0.7 ms. This limits the maximum input voltage during short-circuit conditions,
in the step-down and inverting modes only, to 9 40 V. Normal (unshorted) conditions are not affected. If the LT1072 is being operated
in the step-down or inverting mode at high input voltages and short-circuit conditions are expected, a resistor must be placed in series
with the inductor.


Description

The LT1072 is a monolithic, high-efficiency switching regulator. It can be operated in all standard switching configurations including: step-down (buck), step-up (boost), flyback, forward, inverting, and Cuk†. A high-current, high-efficiency switch is included in the package along with all oscillator, control, and protection circuitry. Integration of all functions allows the LT1072 to be built in standard 5-terminal KC or a KV packages and the 8-terminal P package. This makes it extremely easy to use and provides reliable operation similar to that obtained with 3-terminal linear regulators.

The LT1072 operates with supply voltages from 3 V to 40 V. The LT1072HV, a high-voltage version of the LT1072, operates with supply voltages from 3 V to 60 V. These devices draw only 6 mA of quiescent current, deliver load power up to 20 W with no external power devices, and by utilizing current-mode switching techniques, provide excellent ac and dc input and output regulation.

The LT1072 is much easier to use than the low-power control chips that are presently available and has many unique features that are not found on these chips. It uses an adaptive saturation-preventing switch drive to allow very-wide-ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50 mA typical for standby operation. Totally isolated and regulated outputs can be generated by using the optional flyback-regulation mode built into the LT1072 without using optocouplers or extra transformer windings




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