LT1300 Linear Technology, LT1300 Datasheet
LT1300
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LT1300 Summary of contents
Page 1
... OR 1N5817 Micropower High Efficiency 3.3/5V Step-Up DC/DC Converter DESCRIPTION The LT1300 is a micropower step-up DC/DC converter that utilizes Burst Mode™ operation. The device can deliver 5V or 3.3V from a two-cell battery input. It features program- mable 5V or 3.3V output via a logic-controlled input, no- load quiescent current of 120 A and a shutdown pin which reduces supply current ...
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... ESR is excessive. See applications section INFORMATION ORDER PART TOP VIEW NUMBER 1 PGND LT1300CN8 LT1300CS8 LIM S8 PACKAGE S8 PART MARKING 8-LEAD PLASTIC SOIC 1300 = 100 C, = 150 C/ W JMAX JA MIN TYP MAX 120 200 7 1 ...
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... OUT I FLOATING LIM 600 L = 22µH 500 COILCRAFT DO3316-223 L = 10µH 400 COILCRAFT DO1608-103 300 200 100 0 1 1.5 2 2.5 3 3.5 INPUT VOLTAGE (V) LT1300 G5 Startup Response V OUT 1V/DIV V SHDN 10V/DIV 500 s/DIV LT1300 OUT LOAD LT1300 G3 4 4.5 LT1300 G6 LT1300 G9 3 ...
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... Bypass capacitor from V tied directly to the pin. and LIM CURRENT COMPARATOR A1 OFF COMPARATOR + ENABLE OSCILLATOR 155kHZ – SHUTDOWN SELECT 2 3 Figure 1. should 18mV 730 – A3 DRIVER Q1 Q2 160x 1x BIAS Q3 8.5k PGND I LIM 5 8 LT1300 F1 V OUT + C2 ...
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... TEST CIRCUITS U OPERATION Operation of the LT1300 is best understood by referring to the Block Diagram in Figure 1. When A1’s negative input, related to the Sense pin voltage by the appropriate resis- tor-divider ratio, is higher that the 1.25V reference voltage, A1’s output is low. A2, A3 and the oscillator are turned off, drawing no current. Only the reference and A1 consume current, typically 120 A. When the voltage at A1’ ...
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... The high currents flowing can create IR drops along supply and ground lines and are especially demanding on alkaline batteries. By in- stalling an R1 and C3 as shown in Figure 4, the switch current in the LT1300 is limited to 400mA until the 15 A flowing out of the I pin charges up the 0.1 F capaci- LIM tor ...
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... For lower output power a 1N4148 can be used although efficiency will suffer substantially. Layout Considerations The LT1300 is a high speed, high current device. The input capacitor must be no more than 0.2" from V ground. Connect the PGND and GND (pins 8 and 1) together under the package ...
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... BSC LT/GP 0394 10K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1994 LT1300 TA6 0.250 ± 0.010 (6.350 ± 0.254) N8 0392 5 0.150 – 0. (3.810 – SO8 0294 ...