Datasheet

LP3470
www.ti.com SNVS003F –JUNE 1999–REVISED MARCH 2013
PIN DESCRIPTIONS
Pin Name Function
1 SRT Set Reset Time-out Input. Connect a capacitor between this input and ground to select the Reset Time-out
period (t
RP
). t
RP
= 2000 x C
1
(C
1
in µF and t
RP
in ms). If no capacitor is connected, leave this pin floating.
2 GND Ground pin.
3 V
CC1
Always connect to pin V
CC
(Pin 4).
4 V
CC
Supply voltage, and reset threshold monitor input.
5 Reset Open-Drain, Active-Low reset output. Connect to an external pull-up resistor. Reset changes from high to
low whenever the monitored voltage (V
CC
) drops below the reset threshold voltage (V
RTH
). Once V
CC
exceeds V
RTH
, Reset remains low for the reset timeout period (t
RP
) and then goes high.
Functional Block Diagram
Figure 11.
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