LT1070

Features:

 Wide Input Voltage Range: 3V to 60V
 Low Quiescent Current: 6mA
 Internal 5A Switch (2.5A for LT1071)
 Very Few External Parts Required
 Self Protected Against Overloads
Operates in Nearly All Switching Topologies
 Shutdown Mode Draws Only 50µA Supply Current
 Flyback Regulated Mode Has Fully Floating Outputs
 Comes in Standard 5-Pin Packages
 Can be Externally Synchronized (Consult Factory)


Application

 Logic Supply 5V at 10A
 5V Logic to ±15V Op Amp Supply
 Off-Line Converter Up to 200W
 Battery Upconverter
 Power Inverter (+ to ) or ( to +)
 Fully Floating Multiple Outputs
 For Lower Current Applications, See the LT1072


Specifications

Supply Voltage
    LT1070/LT1071 (Note 2) ....................................    40V
    LT1070HV/LT1071HV (Note 2) ...........................    60V
Switch Output Voltage
    LT1070/LT1071 ..................................................   65V
    LT1070HV/LT1071HV.........................................     75V
Feedback Pin Voltage (Transient, 1ms) ................  ±15V
Operating Junction Temperature Range
    Commercial (Operating) .......................0°C to 100°C
    Commercial (Short Circuit) ...................0°C to 125°C
    Industrial ....................................... 40°C to 125°C
    Military ........................................... 55°C to 150°C
Storage Temperature Range ............. 65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................ 300°C


Description

The LT^® 1070/LT1071 are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and "Cuk". A high current, high efficiency switch is included on the die along with all oscillator,control and protection circuitry. Integration of all functions allows the LT1070/LT1071 to be built in a standard 5-pin TO-3 or T0-220 power package. This makes it extremely easy to use and provides "bust proof" operation similar to that obtained with 3-pin linear regulators.

The LT1070/LT1071 operate with supply voltages from 3V to 60V, and draw only 6mA quiescent current. They can deliver load power up to 100W with no external power devices. By utilizing current mode switching techniques, they provide excellent AC and DC load and line regulation.

The LT1070/LT1071 have many unique features not found even on the vastly more difficult to use low power control chips presently available. They use adaptive antisat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50µA typical for standby operation. Totally isolated and regulated outputs can be generated by using the optional "flyback regulation mode"built into the LT1070/LT1071, without the need for optocouplers or extra transformer windings.