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| TLF50241EL_15 Datasheet, PDF (20/30 Pages) Marl International Limited – 2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current | |||
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TLF50241EL
Reset
Reset output pin (please refer to Figure 7):
The reset output is an open collector structure. As soon as a reset condition occurs, the pin is pulled to ground. A
pull up resistor (R4) connected to VCC or another voltage source is necessary. If the supply (VFB) voltage is below
1 V the open collector structure does no longer pull pin RO to ground. In this case pin RO goes up to the pull-up
voltage (if not supplied by voltage VCC).
V
(related to RTADJ)
< tRR
VRT
VRO
tRD
VROH
tRR
tRR
t
tRD
VROL
t
Figure 7 Reset Function and Timing Diagram
⢠ROH:= Reset Output High Level, depending on voltage sourcing the pull-up resistor at pin RO
⢠ROL:= Reset Output Low Level, Reset signal valid.
The recommended maximum value
for the sum of both resistors R1 and R2 of the external resistor divider is 1.2 MΩ
Data Sheet
20
Rev. 1.0, 2013-06-19
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