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LTC1928-5 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1928-5 Datasheet(HTML) 3 Page - Linear Technology |
3 / 8 page 3 LTC1928-5 Note 5: CN/SHDN must be driven with a source impedance of at least 100 Ω (RSOURCE) to prevent damage to the part. This pin is multiplexed and may be connected through a low switch impedance to VIN. There may be a large amount of current (VIN/RSOURCE) until the shutdown state occurs after which the charge pump switches at CN/SHDN become high impedance and the current will fall to < 8 µA. CPO Output Resistance vs VIN Min and Max VCPO vs VIN VOUT Transient Response Note 4: Operating conditions are limited by maximum junction temperature. The regulated output specification will not apply for all possible combinations of input voltage and output current. When operating at maximum input voltage, the output current range may be limited. When operating at maximum output current, the input voltage range may be limited. Shutdown to Enable Timing (Figure 5) Enable to Shutdown Timing (Figure 5) VIN (V) 35 30 25 20 15 10 5 2.5 3.0 3.5 19285 G01 4.0 4.5 TA = 25°C CFLY = 0.47µF IOUT = 10mA VIN (V) 9 8 7 6 5 4 3 2.5 3.0 3.5 19285 G02 4.0 4.5 (A) (A) THE MAXIMUM GENERATED NO LOAD CPO VOLTAGE (B) THE MINIMUM ALLOWABLE CPO VOLTAGE, AT FULL LOAD, TO ENSURE THAT THE LDO IS NOT DISABLED (B) VCPO = 1.45(VIN) VCPO = 2(VIN) TA = 25°C TIME ( µs) 050 100 200 150 250 300 19285 G03 10 5 0 –5 –10 15 10 5 0 TA = 25°C VIN = 3V VOUT = 5V COUT = 4.7µF 200 µs/DIV 2 0 5 4 3 2 1 0 19285 G04 TA = 25°C VIN = 3V VOUT = 5V IOUT = 10mA COUT = CCPO = 4.7µF 1ms/DIV 2 0 5 4 3 2 1 0 19285 G05 NO LOAD TA = 25°C VIN = 3V VOUT = 5V COUT = 4.7µF ELECTRICAL CHARACTERISTICS VOUT Voltage vs Temperature TEMPERATURE ( °C) –50 5.040 5.030 5.020 5.010 5.000 4.990 4.980 25 75 19285 G06 –25 0 50 100 125 VIN = 3V IOUT = 10mA TYPICAL PERFOR A CE CHARACTERISTICS |
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Similar Description - LTC1928-5_15 |
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