Datasheet

TPS54160 , TPS54160A
www.ti.com SLVSB56C –MAY 2012–REVISED FEBRUARY 2014
Electrical Characteristics (continued)
T
J
= –40°C to 150°C, VIN = 3.5 to 60V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CURRENT LIMIT
Current limit threshold VIN = 12 V, T
J
= 25°C 1.8 2.7 A
THERMAL SHUTDOWN
Thermal shutdown 182 °C
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN)
Switching frequency range using RT mode 100 2500 kHz
f
SW
Switching frequency R
T
= 200 kΩ 450 581 720 kHz
Switching frequency range using CLK
300 2200 kHz
mode
Minimum CLK input pulse width 40 ns
RT/CLK high threshold 1.9 2.2 V
RT/CLK low threshold 0.5 0.7 V
RT/CLK falling edge to PH rising edge
Measured at 500 kHz with RT resistor in series 60 ns
delay
PLL lock in time Measured at 500 kHz 100 μs
SLOW START AND TRACKING (SS/TR)
Charge current V
SS/TR
= 0.4 V 2 μA
SS/TR-to-VSENSE matching V
SS/TR
= 0.4 V 45 mV
SS/TR-to-reference crossover 98% nominal 1.0 V
SS/TR discharge current (overload) VSENSE = 0 V, V(SS/TR) = 0.4 V 112 μA
SS/TR discharge voltage VSENSE = 0 V 54 mV
POWER GOOD (PWRGD PIN)
VSENSE falling 92%
VSENSE rising 94%
V
VSENSE
VSENSE threshold
VSENSE rising 109%
VSENSE falling 107%
Hysteresis VSENSE falling 2%
Output high leakage VSENSE = V
REF
, V
(PWRGD)
= 5.5 V, 25°C 10 nA
On resistance I
(PWRGD)
= 3 mA, VSENSE < 0.79 V 50 Ω
Minimum VIN for defined output V
(PWRGD)
< 0.5 V, I
(PWRGD)
= 100 μA 0.95 1.5 V
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