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SPX2941T5 Datasheet(PDF) 3 Page - Sipex Corporation |
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SPX2941T5 Datasheet(HTML) 3 Page - Sipex Corporation |
3 / 7 page 3 Date: 08/25/04 SPX2941 1A Low Dropout Voltage Regulator © Copyright 2004 Sipex Corporation NOTE 1: Dropout voltage is defined as the input to output differential at which the output voltage drops to 99% of its nominal value. NOTE 2: V IN=VOUT(NOMINAL)+1V; for example, VIN=4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise. NOTE 3: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load and ground currents. NOTE 4: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. NOTE 5: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured 6V input. To express these thresholds in terms of output voltage change, multiply the error amplifier gain = V OUT/VREF = (R1 + R2)/R2. For example, at a programmable output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mVx 5V/ 1.240V = 38mV. Threshold remain constant as a percent of V OUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. NOTE 6: V EN ≤ 0.8V and VIN ≤ 16V, VOUT = 0. NOTE7: Maximum positive supply voltage of 20V must be of limited duration ( <100ms) and duty cycle (<1%). The maximum continuous supply voltage is 16V. NOTE 8: V REF ≤ VOUT ≤ (VIN-1), 2.5V ≤ VIN ≤ 16V, 10 mA ≤ IC ≤ IFL, TJ < TJMAX. Reference Thermal Shutdown EN IN OUT ADJ GND O.V I LIMIT 28V R1* R2* 1.180V 1.240V + + -- FLAG Figure 2. SP2941 Block Diagram BLOCK DIAGRAM |
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