NTE7173
NTE7173SM
Integrated Circuit
1.5A Step−Up/Down Inverting
Switching Regulator
Description:
The NTE7173 and NTE 7173SM are monolithic circuits containing the primary functions required for
DC−to−DC converters. These devices consist of an internal temperature compensated reference,
comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current
output switch. This series was specifically designed to be incorporated in Step−Down and Step−Up
and Voltage−Inverting applications with a minimum number of external components.
Features:
D Operation from 3V to 40V Input
D Low Standby Current
D Output Switch Current 1.5A
D Output Voltage Adjustable
D Frequency Operation to 100kHz
D Precision 2% Reference
Absolute Maximum Ratings:
Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Vdc
Comparator Input Voltage Range, VIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 to +40Vdc
Switch Collector Voltage, VC(switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Vdc
Switch Emitter Voltage (VPin1), VE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Vdc
Switch Collector−to−Emitter Voltage, VCE(switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Vdc
Driver Collector Voltage, VC(driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Vdc
Driver Collector Current (Note1), IC(driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
Switch Current, ISW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A
Power Dissipation (TA = +25°C), PD
NTE7173 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25W
NTE7173SM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW
Thermal Resistance, Junction−to−Ambient, RthJA
NTE7173 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +100°C/W
NTE7173SM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +160°C/W
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +150°C
Note 1. Maximum package power dissipation limits must be observed.