Datasheet

TPS54418
SLVS946C –MAY 2009–REVISED JULY 2013 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
T
J
= –40°C to 150°C, VIN = 2.95 to 6 V (unless otherwise noted)
DESCRIPTION CONDITIONS MIN TYP MAX UNIT
BOOT (BOOT PIN)
BOOT Charge Resistance VIN = 5 V 16 Ω
BOOT-PH UVLO VIN = 2.95 V 2.1 V
SLOW START (SS PIN)
Charge Current V(SS) = 0.4 V 1.8 μA
SS to reference crossover 98% nominal 0.9 V
SS discharge voltage (overload) VSENSE = 0 V 20 μA
SS discharge current (UVLO, EN, Thermal VIN = 5 V, V(SS) = 0.5 V 1.25 mA
Fault)
POWER GOOD (PWRGD PIN)
VSENSE falling (Fault) 91 % Vref
VSENSE rising (Good) 93 % Vref
VSENSE threshold
VSENSE rising (Fault) 107 % Vref
VSENSE falling (Good) 105 % Vref
Hysteresis VSENSE falling 2 % Vref
Output high leakage VSENSE = VREF, V
(PWRGD)
= 5.5 V 2 nA
On resistance 100 Ω
Output low I
(PWRGD)
= 3.5 mA 0.3 V
Minimum VIN for valid output V
(PWRGD)
< 0.5 V at 100 μA 1.2 1.6 V
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