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TPS54040QDRCRQ1 Datasheet(PDF) 4 Page - Texas Instruments

No. de pieza TPS54040QDRCRQ1
Descripción Electrónicos  0.5-A 42-V STEP-DOWN SWIFT??DC/DC CONVERTER WITH Eco-mode?
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Fabricante Electrónico  TI1 [Texas Instruments]
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TPS54040QDRCRQ1 Datasheet(HTML) 4 Page - Texas Instruments

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TPS54040-Q1
SLVSA26D – JANUARY 2010 – REVISED AUGUST 2012
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
TJ = –40°C to 150°C, VIN = 3.5 to 42 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CURRENT LIMIT
Current limit threshold
VIN = 12 V, TJ = 25°C
0.6
0.94
A
THERMAL SHUTDOWN
Thermal shutdown
182
°C
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN)
Switching frequency using RT mode
VIN = 12 V
100
2500
kHz
fSW
Switching frequency
VIN = 12 V, RT = 200 kΩ
450
581
720
kHz
Switching frequency using CLK mode VIN = 12 V
300
2200
kHz
Minimum CLK input pulse width
40
ns
RT/CLK high threshold
VIN = 12 V
1.9
2.2
V
RT/CLK low threshold
VIN = 12 V
0.45
0.7
V
RT/CLK falling edge to PH rising
Measured at 500 kHz with RT resistor in series
60
ns
edge delay
PLL lock in time
Measured at 500 kHz
100
μs
SLOW START AND TRACKING (SS/TR)
Charge current
VSS/TR = 0.4 V
2
μA
SS/TR-to-VSENSE matching
VSS/TR = 0.4 V
45
mV
SS/TR-to-reference crossover
98% nominal
1
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 (fault)
92
VSENSE rising (good)
94
VVSENSE
VSENSE threshold
VSENSE rising (fault)
109
%
VSENSE falling (good)
107
Hysteresis
VSENSE falling
2
Output high leakage
VSENSE = VREF, V(PWRGD) = 5.5 V, 25°C
10
nA
On resistance
I(PWRGD) = 3 mA, VSENSE < 0.79 V
50
Minimum VIN for defined output
V(PWRGD) < 0.5 V, II(PWRGD) = 100
μA
0.95
1.5
V
4
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