PDF《SPX29150/51/52/53》

13 ppm/°C Adjust Pin Bias Current Temperature Coefficient 0.1 nA/°C Flag Output (Error Comparator) SPX29151/53 Output Leakage Current VOH=16V 0.1 1.00 2.00 UA Output Low Voltage Device set for 5V, VIN=4.5V, IOL=250?A

200 300

400 mV REV B 06/05/08 SP29150/51/52/53 1.5A Low Dropout Voltage Regulator ? Copyright

2008 Exar Corporation NOTES: Note 1: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its nominal value. Note 2: VIN = VOUT (NOMINAL) +1V. For example, use 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 current to the ground current. 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 = VOUT/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. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. Note 6: VEN ≤ 0.8V and VIN ≤ 16V, VOUT = 0. Note 7: Maximum positive supply voltage of 20V must be of limited duration (