Datasheet

TPS2231
TPS2236
www.ti.com .................................................................................................................................................. SLVS536J –JULY 2004–REVISED SEPTEMBER 2009
ELECTRICAL CHARACTERISTICS (continued)
T
J
= 25°C, V
I(3.3VIN)
= V
I(AUXIN)
= 3.3 V, V
I(1.5VIN)
= 1.5 V, V
I(/SHDNx)
, V
I(/STBYx)
= 3.3 V, V
I(/CPPEx)
= V
I(/CPUSBx)
= 0 V,
V
I(/SYSRST)
= 3.3 V, OCx and RCLKENx and PERSTx are open, all voltage outputs unloaded (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
3.3VOUT, AUXOUT, and 1.5VOUT rising within
PERST de-assertion delay from output voltage 4 10 20 ms
tolerance
PERST assertion delay from SYSRST Max time from SYSRST asserted or de-asserted 500 ns
3.3VOUT, AUXOUT, or 1.5VOUT falling out of
t
W(PERST)
PERST minimum pulse width 100 250 μs
tolerance or triggered by SYSRST
PERST output low voltage 0.4 V
I
O(PERST)
= 500 μA
PERST output high voltage 2.4 V
OC output low voltage I
O(/OC)
= 2 mA 0.4 V
OC leakage current V
O(/OC)
= 3.6 V 1 μA
OC deglitch Falling into or out of an overcurrent condition 6 20 mS
UNDERVOLTAGE LOCKOUT (UVLO)
3.3VIN level, below which 3.3VIN and 1.5VIN
switches are off
3.3VIN UVLO 2.6 2.9
3.3VIN level, below which 3.3VIN switch is off
(TPS2231-3 only)
1.5VIN level, below which 3.3VIN and 1.5VIN V
switches are off
1.5VIN UVLO 1 1.25
1.5VIN level, below which 1.5VIN switch is off
(TPS2231-3 only)
AUXIN UVLO AUXIN level, below which all switches are off 2.6 2.9
UVLO hysteresis 100 mV
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