LT1614 Linear Technology, LT1614 Datasheet
LT1614
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LT1614 Summary of contents
Page 1
... Fixed frequency switching ensures a clean output free from low frequency noise. The device contains a low- battery detector with a 200mV reference and shuts down to less than load quiescent current of the LT1614 is 1mA and the internal NPN power switch handles a 500mA current with a voltage drop of just 295mV. ...
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... Switch Current Limit (Note Operating Temperature Range LT1614C ................................................. LT1614I ............................................. – Extended Commercial 1V Temperature Range (Note 1) .................. – LBI Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART ...
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... The denotes specifications which apply over the full operating temperature range. Note 1: The LT1614C is guaranteed to meet specified performance from and is designed, characterized and expected to meet these extended temperature limits, but is not tested at – and 85 C. The LT1614I is guaranteed to meet the extended temperature limits. ...
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... LT1614 PIN FUNCTIONS NFB (Pin 1): Negative Feedback Pin. Reference voltage is – 1.24V. Connect resistive divider tap here. The sug- gested value for R2 is 24.9k. Set R1 and R2 according to – OUT – • (Pin 2): Compensation Pin for Error Amplifier. Con- C nect a series RC from this pin to ground ...
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... Figure 1. Note that allowing SHDN to float turns on both the start- up current (Q2) and the shutdown current (Q3) for The LT1614 doesn’t know what this situation BE and behaves erratically. SHDN voltage above V lowed. This merely reverse-biases Q3’s base emitter junc- tion, a benign condition ...
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... LT1614 U TYPICAL APPLICATION – 15V/80mA DC/DC Converter SHDN 255k 22 F LT1614 D1 V NFB C GND 24.9k 100k 1nF C1: 25V, Y5V D1: MBR0520 L1, L2: MURATA LQH3C220 5V to – 15V Converter Efficiency LOAD CURRENT (mA) 1614 TA06 ...
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... MSOP (MS8) 1197 (0.65) TYP 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) TYP SO8 0996 LT1614 7 ...
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... Linear Technology Corporation 8 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 : (408) 434-0507 FAX TELEX 3.3V to – 3.1V/200mA DC/DC Converter SHDN + 18.7k LT1614 GND 12.7k 100k 1nF C1: AVX1206CY106 D1: MBR0520 L1, L2: MURATA LQH3C220 3.3V to – 3.1V Converter Efficiency ...