Datasheet

TPS70245, TPS70248
TPS70251, TPS70258
TPS70202
SLVS286E –JUNE 2000–REVISED DECEMBER 2009 www.ti.com
FB1 and FB2
FB1 and FB2 are input terminals used for adjustable-output devices and must be connected to the external
feedback resistor divider. FB1 and FB2 connections should be as short as possible. It is essential to route them
in such a way as to minimize or avoid noise pickup. Adding RC networks between FB terminals and V
OUT
terminals to filter noise is not recommended because these networks can cause the regulators to oscillate.
RESET Indicator
The TPS702xx features a RESET (SVS, POR, or power on reset). RESET can be used to drive power on reset
circuitry or a low-battery indicator. RESET is an active low, open drain output that indicates the status of the
manual reset pin (MR). When MR is in a high impedance state, RESET goes to a high impedance state after a
120 ms delay. To monitor V
OUT1
, the PG1 output pin can be connected to MR. To monitor V
OUT2
, the PG2 output
pin can be connected to MR. The open drain output of the RESET terminal requires a pull-up resistor. If RESET
is not used, it can be left floating.
V
IN1
and V
IN2
V
IN1
and V
IN2
are inputs to each regulator. Internal bias voltages are powered by V
IN1
.
V
OUT1
and V
OUT2
V
OUT1
and V
OUT2
are output terminals of each regulator.
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