LT1949-1EMS8#TRPBF Linear Technology, LT1949-1EMS8#TRPBF Datasheet
LT1949-1EMS8#TRPBF
Specifications of LT1949-1EMS8#TRPBF
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LT1949-1EMS8#TRPBF Summary of contents
Page 1
... The LT 1949 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 LT1949-1 is ideal for generating bias voltages for large screen LCD panels. Constant frequency 1.1MHz 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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... 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 LT1949-1E 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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... TEMPERATURE ( C) 1949-1 G05 FB Pin Bias Current –50 – 100 TEMPERATURE ( C) 1949-1 G08 LT1949-1 Switch Current Limit, Duty Cycle = 30% 1.3 1.2 1.1 1.0 0.9 0.8 –50 – 100 TEMPERATURE ( C) 1949-1 G03 Quiescent Current, SHDN = 2V 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5 ...
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... LT1949 TYPICAL PERFOR A CE CHARACTERISTICS AC COUPLED CTIO S V (Pin 1): Compensation Pin for Error Amplifier. Con- C nect a series RC network from this pin to ground. Typical values for compensation are a 30k/330pF combination when using ceramic output capacitors. Minimize trace area (Pin 2): Feedback Pin. Reference voltage is 1.24V. ...
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... IN oscillation. The ground terminal of output capacitor C2 should tie close to Pin 4 of the LT1949-1. 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 APPLICATIO S I FOR ATIO Low-Battery Detector The LT1949-1’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 MSOP (LTC DWG # 05-08-1660) 0.118 0.004* (3.00 0.102) 0.193 0.006 (4.90 0.15) 0.040 0.006 (1.02 0.15) 0 – 6 TYP SEATING PLANE 0.012 0.021 0.006 (0.30) (0.53 0.015) 0.0256 REF LT1949 OUT 5V 250mA 100k 6.3V 33.2k 1% 1949-1 TA02 0.118 0.004** (3.00 0.102) ...
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... Low Profile Triple Output LCD Bias Generator 0 4 SHDN R2 LT1949-1 40. GND 30.1k 7.5k C3 330pF COMMENTS 5V/600mA from 2V, 2A Internal Switch, 200 A I Low-Battery Detector Active in Shutdown 3.3V at 75mA from 1 Cell, MSOP Package 36V Switch, Fixed Frequency Operation, SO-8 and TSSOP Packages 2 Cells to 3 ...