LT1172CN8

Series: -
Output Type: Adjustable
Number of Outputs: 1
Voltage - Input: 3 V ~ 40 V
Frequency - Switching: 100kHz
Synchronous Rectifier: No
Voltage - Output: 1.25 V ~ 40 V
Mounting Type: Through Hole
Package / Case: 8-DIP (0.300", 7.62mm)
Packaging: Tube
Supplier Device Package: 8-PDIP
PWM Type: Current Mode
Current - Output: 1.25A
Manufacturer: Linear Technology
Operating Temperature: 0°C ~ 100°C
Type: Step-Down (Buck), Step-Up (Boost), Inverting, Cuk, Flyback, Forward Converter


Pinout




Description

The LT1172CN8 is a type of monolithic high power switching regulators, which can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and "Cuk." A high current, high eff iciency switch is included on the die along with all oscillator, control and protection circuitry. conbination of all functions accepts the LT1172CN8 to be built in a standard 5-pin TO-3 or TO-220 power package as well as the 8-pin packages (LT1172). This makes it very easy to use and offer "bust proof" operation similar with that obtained with 3-pin linear regulators.

Features of the LT1172CN8 are:(1)wide input voltage range: 3V to 60V;(2)low quiescent current: 6mA;(3)internal 5A switch (1.25A for LT1172CN8);(4)shutdown mode Draws only 50mA supply current;(5)very few extern al parts required;(6)self-protected against overloads;(7)operates in nearly all switching topologies;(8)flyback-regulated mode Has fully floating outputs;(9)comes in standard 5-pin packages.etc.

The absolute maximum ratings and electrical characteristics(TA = 25°C. VIN = 15V, VC = 0.5V, VFB = VREF)of the LT1172CN8 can be summarized as:(1):supply vo;tage is 40V;(2):switch output voltage is 65V(3):feedback pin volatge is ±15V;(4):storage temperature range is -65°C to 150°C;(5):lead temperature (soldering, 10 sec) is 300°C;(6):operating junction temperature ranges from 0°C to 100°C.Electrical characteristic (1):referen ce voltage is 1.214V min,1.244V typ and 1.274V max when VC is 0.8V;(2):feedback input current is 350nA typ and 750nA maax when VFB is VREF;(3):error amplifier clamp voltage is 1.80V min and 2.3V max of hi clamp when VFB is 1V;(4):error amplifier voltage gain is 500V/Vmin and 800V/V typ when VC is between 0.9V and 1.4V;(5):flyback reference voltage is 15.0V min,16.3Vtyp and 17.6V max when IFB is 50mA.etc.

Parameters:

Technical/Catalog Information	LT1172CN8
Vendor	Linear Technology
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck), Step-Up (Boost), Inverting, Cuk, Flyback, Forward Converter
Number of Outputs	1
Voltage - Input	3 ~ 60 V
Voltage - Output	-
Current - Output	1.25A
Power - Output	100W
Package / Case	8-DIP (300 mil)
Packaging	Tube
Internal Switch(s)	Yes
Synchronous	Yes
Rds (On)	600 mOhm
Operating Temperature	0°C ~ 100°C
Frequency - Switching	100kHz
Drawing Number	161; 05-08-1510; N; 8
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	LT1172CN8 LT1172CN8