Document
U U
LT1082
1A High Voltage, Efficiency Switching Voltage Regulator
FEATURES
s Wide Input Voltage Range: 3V to 75V s High Switch Voltage: 100V s Low Quiescent Current: 4.5mA s Internal 1A Switch s Shutdown Mode Draws Only 120µA Supply Current s Isolated Flyback Regulation Mode for Fully Floating
Outputs s Can Be Externally Synchronized s Available in MiniDIP and TO-220 Packages s Same Pinout as LT1072
U APPLICATIO S
s Telecom 5V Supply at 0.7A from –48V s 90V Supply at 120mA from 15V s All Applications Using LT1072 (See Below for
Specification Differences)
LT1082 and LT1072 Major Specification Differences
LT1082C
LT1072HV
VIN VSW Switch Current Limit
Quiescent Current
Operating Frequency
Flyback Reference Voltage
3V to 75V
3V to 60V
100V 75V
1A 1.25A
4.5mA
6mA
60kHz
40kHz
16.2 + 0.6 (35kΩ/RFB) 16 + 0.35 (7kΩ/RFB)
USER NOTE: This data sheet is only intended to provide specifications, graphs, and a general functional description of the LT1082. Application circuit.