LP2953_15 Datasheet, PDF (30/41 Pages) Texas Instruments – LP295x Adjustable Micropower Low-Dropout Voltage Regulators

LP2952-N, LP2952A, LP2953, LP2953A
SNVS095F – MAY 2004 – REVISED MARCH 2015
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8.2.9 5-V Regulator With Timed Power-On Reset, Snap-ON and Snap-OFF Features, and Hysteresis
Figure 44 is the circuit designed for 5-V regulator with timed power-on reset, Snap-ON and Snap-OFF features,
and hysteresis. Its timing diagram shows as Figure 45.
Figure 44. 5-V Regulator With Timed Power-On Reset, Snap-ON or Snap-OFF Feature, and Hysteresis
t_d = (0.28), RC = 28 ms for components shown.
Figure 45. Timing Diagram
9 Power Supply Recommendations
The LP2952 and LP2953 is designed to operate from an input voltage supply range between 2.3 V and 30 V.
The input voltage range provides adequate headroom in order for the device to have a regulated output, normally
V_IN should be 1 V higher than output voltage to provide a sufficient headroom. This input supply must be well
regulated. If the input supply is noisy, additional input capacitors with low ESR can help improve the output noise
performance.
Maximum V_IN should never be higher than 30 V. Input voltage beyond 30 V may trigger EOS and cause
permanent damage to the device.
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