LT1949 LINER [Linear Technology], LT1949 Datasheet
LT1949
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LT1949 Summary of contents
Page 1
... The LT 1949 is a fixed frequency step-up DC/DC con- verter with a 1A, 0.5 internal switch. Capable of gener- ating 10V at 175mA from a 3.3V input, the LT1949 is ideal for generating bias voltages for large screen LCD panels. Constant frequency 600kHz operation results in a low noise output that is easy to filter and the 30V switch rating allows output voltage up to 28V using a single inductor ...
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... LBI Input Bias Current (Note 5) Low-Battery Detector Gain Switch Leakage Current 2 U (Note 1) Junction Temperature .......................................... 125 C Operating Temperature Range (Note 2) + 0.3V LT1949EMS8 .......................................– LT1949ES8/LT1949IS8 .......................– Storage Temperature ........................... – 150 C LBI Lead Temperature (Soldering, 10sec).................. 300 ORDER PART ...
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... SHDN Input Voltage Low Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT1949E is guaranteed to meet performance specifications from Specifications over the – operating temperature range are assured by design, characterization and correlation with statistical process controls ...
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... LT1949 W U TYPICAL PERFOR A CE CHARACTERISTICS Quiescent Current, SHDN = –50 – TEMPERATURE ( C) 1317 TPC10 Load Regulation V OUT 50mV/DIV DC COUPLED OFFSET ADDED I 25mA/DIV LOAD 10V OUT SUMIDA CD54 CERAMIC OUT 1949 G10 ...
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... IN oscillation. The ground terminal of output capacitor C2 should tie close to Pin 4 of the LT1949. Doing this reduces dI/dt in the ground copper which keeps high frequency spikes to a minimum. The DC/DC converter ground should tie to the PC board ground plane at one place only, to avoid intro- ducing dI/dt in the ground plane ...
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... U APPLICATIONS INFORMATION Low-Battery Detector The LT1949’s low-battery detector is a simple PNP input gain stage with an open collector NPN output. The nega- tive input of the gain stage is tied internally to a 200mV 5% reference. The positive input is the LBI pin. Arrange- ment as a low-battery detector is straightforward. ...
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... Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.053 – 0.069 (1.346 – 1.752) 0.004 – 0.010 (0.101 – 0.254) 0.050 0.014 – 0.019 (0.355 – 0.483) (1.270) TYP BSC LT1949 V OUT 5V 250mA 6.3V 332k C1, C2: TAIYO YUDEN EMK316BJ475ML ...
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... McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com Low Profile Triple Output LCD Bias Generator 0 40.2k SHDN 1% LT1949 LBI FB LB0 V GND 7.5k 47k 1% C3 680pF C6 4 COMMENTS Up to 100mA Output with No Inductors ...