Datasheet

VIN
VOUT
RDELAY
nRST
VTH(POR)
tPOR
VTH(RDELAY)
t < tDEGLITCH
tDEGLITCH
UVTHRES
tDEGLITCH
tPOR
t > tDEGLITCH
ON
OFF
Charge Pump State
9.2
9.6
Hysteresis
V (V)
IN
ON
OFF
Charge Pump State
7.8 7.9
Hysteresis
V (V)
IN
TPS7A6033-Q1, TPS7A6050-Q1
TPS7A6133-Q1, TPS7A6150-Q1
SLVSA62G MARCH 2010REVISED MARCH 2012
www.ti.com
In case of negative transients in the input voltage While nRST is low, if the input voltage resumes to the
(V
IN
), the reset signal will be asserted low only if the nominal operating voltage, normal power up
output (V
OUT
) drops and stays below the reset sequence will be followed. nRST will be asserted
threshold level (V
TH(POR)
) for more than deglitch time high, only if the output voltage exceeds the reset
(t
DEGLITCH
). This is shown in Figure 8. threshold voltage (V
TH(POR)
) and the reset delay time
(t
POR
) has elapsed. This is shown in the shaded
region of Figure 8.
Figure 8. Conditions for Activation of Reset
Charge Pump Operation
These devices have an internal charge pump which lower input voltages and turns off at higher input
turns on or off depending on the input voltage and the voltages. The charge pump switching thresholds are
output current. The charge pump switching circuitry hysteretic. Figure 9 and Figure 10 shows typical
shall not cause conducted emissions to exceed switching thresholds for the charge pump at light (I
OUT
required thresholds on the input voltage line. For a < ~2mA) and heavy (I
OUT
> ~2mA) loads respectively.
given output current, the charge pump stays on at
Figure 9. Charge Pump Operation at Light Loads Figure 10. Charge Pump Operation at Heavy Loads
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