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LT1930AES5 Datasheet(PDF) 3 Page - Linear Technology |
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LT1930AES5 Datasheet(HTML) 3 Page - Linear Technology |
3 / 12 page 3 LT1930/LT1930A TYPICAL PERFOR A CE CHARACTERISTICS Quiescent Current FB Pin Voltage SHDN Pin Current Current Limit Switch Saturation Voltage Oscillator Frequency SW (Pin 1): Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI. GND (Pin 2): Ground. Tie directly to local ground plane. FB (Pin 3): Feedback Pin. Reference voltage is 1.255V. Connect resistive divider tap here. Minimize trace area at FB. Set VOUT according to VOUT = 1.255V(1 + R1/R2). PI FU CTIO S SHDN (Pin 4): Shutdown Pin. Tie to 2.4V or more to enable device. Ground to shut down. VIN (Pin 5): Input Supply Pin. Must be locally bypassed. TEMPERATURE ( °C) –50 –25 50 75 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 1930/A G01 0 25 100 NOT SWITCHING LT1930A LT1930 TEMPERATURE ( °C) –50 1.22 1.23 1.24 1.25 1.26 1.28 –25 025 50 1930/A G02 75 100 1.27 SHDN PIN VOLTAGE (V) 0 20 30 40 3 5 1930/A G03 10 0 –10 12 4 50 60 70 80 90 6 LT1930A LT1930 DUTY CYCLE (%) 10 0.8 1.2 1930/A G04 0.4 0 30 20 50 40 70 60 90 80 1.6 0.6 1.0 0.2 1.4 SWITCH CURRENT (A) 0 0 0.05 0.15 0.20 0.25 0.8 0.45 1930/A G05 0.10 0.4 1.2 0.6 0.2 1.0 0.30 0.35 0.40 TEMPERATURE ( °C) –50 –25 0 2.5 2.3 2.1 1.9 1.7 1.5 1.3 1.1 0.9 0.7 0.5 25 50 75 100 1930/A G06 LT1930 LT1930A |
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