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參數(shù)資料
型號(hào)： TPS54622RHLT
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 15 A SWITCHING REGULATOR, 1760 kHz SWITCHING FREQ-MAX, PQCC14
封裝： 3.50 X 3.50 MM, GREEN, PLASTIC, QFN-14
文件頁(yè)數(shù)： 23/36頁(yè)
文件大?。?/td> 1190K
代理商： TPS54622RHLT
SLVSA70
– MARCH 2011
THERMAL INFORMATION
TPS54622
THERMAL METRIC(1)(2)
QFN
UNITS
14 PINS
θJA
Junction-to-ambient thermal resistance
47.2
θJA
Junction-to-ambient thermal resistance(3)
32
θJCtop
Junction-to-case (top) thermal resistance
64.8
θJB
Junction-to-board thermal resistance
14.4
°C/W
ψJT
Junction-to-top characterization parameter
0.5
ψJB
Junction-to-board characterization parameter
14.7
θJCbot
Junction-to-case (bottom) thermal resistance
3.2
(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. Thermal management of the PCB should strive to keep the junction temperature at or below
150
°C for best performance and long-term reliability. See power dissipation estimate in application section of this data sheet for more
information.
(3)
Test board conditions:
(a) 2.5 inches
× 2.5 inches, 4 layers, thickness: 0.062 inch
(b) 2 oz. copper traces located on the top of the PCB
(c) 2 oz. copper ground planes on the 2 internal layers and bottom layer
(d) 4 0.010 inch thermal vias located under the device package
ELECTRICAL CHARACTERISTICS
TJ = –40°C to 150°C, VIN = 4.5V to 17V, PVIN = 1.6V to 17V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE (VIN AND PVIN PINS)
PVIN operating input voltage
1.6
17
V
VIN operating input voltage
4.5
17
V
VIN internal UVLO threshold
VIN rising
4.0
4.5
V
VIN internal UVLO hysteresis
150
mV
VIN shutdown supply Current
EN = 0 V
2
5
μA
VIN operating
– non switching supply current
VSENSE = 810 mV
600
800
μA
ENABLE AND UVLO (EN PIN)
Enable threshold
Rising
1.21
1.26
V
Enable threshold
Falling
1.10
1.17
Input current
EN = 1.1 V
1.15
μA
Hysteresis current
EN = 1.3 V
3.3
μA
VOLTAGE REFERENCE
Voltage reference
0 A
≤ IOUT ≤ 6 A
0.594
0.6
0.606
V
MOSFET
High-side switch resistance
BOOT-PH = 3 V
32
60
m
High-side switch resistance(1)
BOOT-PH = 6 V
26
40
m
Low-side Switch Resistance(1)
VIN = 12 V
19
30
m
ERROR AMPLIFIER
Error amplifier Transconductance (gm)
–2 μA < ICOMP < 2 μA, V(COMP) = 1 V
1300
μMhos
Error amplifier dc gain
VSENSE = 0.8 V
1000
3100
V/V
V(COMP) = 1 V, 100 mV input
Error amplifier source/sink
±110
μA
overdrive
Start switching threshold
0.25
V
COMP to Iswitch gm
16
A/V
CURRENT LIMIT
(1)
Measured at pins
Copyright
2011, Texas Instruments Incorporated
3
Product Folder Link(s) :TPS54622
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