TPS54160 Datasheet, PDF (4/45 Pages) Texas Instruments – 1.5-A, 60V STEP DOWN SWIFT™ DC/DC CONVERTER WITH ECO-MODTM

TPS54160
SLVS795A – OCTOBER 2008 – REVISED OCTOBER 2008 ............................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
T_J = –40°C to 150°C, VIN = 3.5 to 60V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN)
Switching Frequency Range using
RT mode
f_SW
Switching frequency
R_T = 200 kΩ
Switching Frequency Range using
CLK mode
Minimum CLK pulse width
RT/CLK high threshold
RT/CLK low threshold
RT/CLK falling edge to PH rising
edge delay
Measured at 500 kHz with RT resistor in series
PLL lock in time
Measured at 500 kHz
SLOW START AND TRACKING (SS/TR)
Charge current
SS/TR-to-VSENSE matching
SS/TR-to-reference crossover
V_SS/TR = 0.4 V
V_SS/TR = 0.4 V
98% nominal
SS/TR discharge current (overload) VSENSE = 0 V, V(SS/TR) = 0.4 V
SS/TR discharge current
VSENSE = 0 V
POWER GOOD (PWRGD PIN)
VSENSE falling
V_VSENSE VSENSE threshold
VSENSE rising
VSENSE rising
VSENSE falling
Hysteresis
VSENSE falling
Output high leakage
VSENSE = VREF, V(PWRGD) = 5.5 V, 25°C
On resistance
I(PWRGD) = 3 mA, VSENSE < 0.79 V
Minimum VIN for defined output
V(PWRGD) < 0.5 V, II(PWRGD) = 100 µA
MIN TYP MAX UNIT
300
2500 kHz
450
581
720 kHz
300
2200 kHz
40
ns
1.9
2.2 V
0.5
0.7
V
60
ns
100
µs
2
µA
45
mV
1.0
V
112
µA
54
mV
92%
94%
109%
107%
2%
10
50
0.95
nA
Ω
1.5 V
4
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