Datasheet

TPS54240
www.ti.com SLVSAA6A –APRIL 2010–REVISED DECEMBER 2012
THERMAL INFORMATION
TPS54240
THERMAL METRIC
(1)(2)
UNITS
DGQ (10 PINS) DRC (10 PINS)
θ
JA
Junction-to-ambient thermal resistance (standard board) 62.5 40
ψ
JT
Junction-to-top characterization parameter 1.7 0.6
ψ
JB
Junction-to-board characterization parameter 20.1 7.5
°C/W
θ
JCtop
Junction-to-case(top) thermal resistance 83 65
θ
JCbot
Junction-to-case(bottom) thermal resistance 21 7.8
θ
JB
Junction-to-board thermal resistance 28 8
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
(2) Power rating at a specific ambient temperature TA should be determined with a junction temperature of 150°C. This is the point where
distortion starts to substantially increase. See power dissipation estimate in application section of this data sheet for more information.
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ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 150°C, VIN = 3.5 to 42V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage 3.5 42 V
Internal undervoltage lockout
No voltage hysteresis, rising and falling 2.5 V
threshold
Shutdown supply current EN = 0 V, 25°C, 3.5 V ≤ VIN ≤ 42 V 1.3 4
μA
Operating : nonswitching supply
VSENSE = 0.83 V, VIN = 12 V, 25°C 138 200
current
ENABLE AND UVLO (EN PIN)
Enable threshold voltage No voltage hysteresis, rising and falling, 25°C 1.15 1.25 1.36 V
Enable threshold +50 mV –3.8
Input current μA
Enable threshold –50 mV –0.9
Hysteresis current –2.9 μA
VOLTAGE REFERENCE
T
J
= 25°C 0.792 0.8 0.808
Voltage reference V
0.784 0.8 0.816
HIGH-SIDE MOSFET
VIN = 3.5 V, BOOT-PH = 3 V 300
On-resistance mΩ
VIN = 12 V, BOOT-PH = 6 V 200 410
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