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TPS54040ADRC Datasheet(PDF) 3 Page - Texas Instruments

Part # TPS54040ADRC
Description  0.5 A, 42 V Step Down SWIFT??DC/DC Converter with ECO-MODE?
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54040ADRC Datasheet(HTML) 3 Page - Texas Instruments

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TPS54040A
www.ti.com
SLVSB58 – MARCH 2012
THERMAL INFORMATION
TPS54040A
THERMAL METRIC(1)
UNITS
DGQ (10 PINS)
DRC (10 PINS)
θJA
Junction-to-ambient thermal resistance (standard board)
62.5
40
θJCtop
Junction-to-case (top) thermal resistance
83
65
θJB
Junction-to-board thermal resistance
28
8
°C/W
ψJT
Junction-to-top characterization parameter
1.7
0.6
ψJB
Junction-to-board characterization parameter
20.1
7.5
θJCbot
Junction-to-case (bottom) thermal resistance
21
7.8
(1)
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
ELECTRICAL CHARACTERISTICS
TJ = –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
116
136
current
ENABLE AND UVLO (EN PIN)
Enable threshold voltage
No voltage hysteresis, rising and falling
1.11
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
TJ = 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
m
VIN = 12 V, BOOT-PH = 6 V
200
410
ERROR AMPLIFIER
Input current
50
nA
Error amplifier transconductance (gM) –2 μA < ICOMP < 2 μA, VCOMP = 1 V
97
μMhos
–2
μA < ICOMP < 2 μA, VCOMP = 1 V,
Error amplifier transconductance (gM)
26
μMhos
during slow start
VVSENSE = 0.4 V
Error amplifier dc gain
VVSENSE = 0.8 V
10,000
V/V
Error amplifier bandwidth
2700
kHz
Error amplifier source/sink
V(COMP) = 1 V, 100 mV overdrive
±7
μA
COMP to switch current
1.9
A/V
transconductance
CURRENT LIMIT
Current limit threshold
VIN = 12 V, TJ = 25°C
0.6
0.94
A
THERMAL SHUTDOWN
Thermal shutdown
182
°C
Copyright © 2012, Texas Instruments Incorporated
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