參數(shù)資料
型號： TPS54320RHLR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 1320 kHz SWITCHING FREQ-MAX, PQCC14
封裝： 3.50 X 3.50 MM, GREEN, PLASTIC, QFN-14
文件頁數(shù)： 23/39頁
文件大?。?/td> 1358K
代理商： TPS54320RHLR
www.ti.com
SLVS982A – AUGUST 2010 – REVISED SEPTEMBER 2010
THERMAL INFORMATION
TPS54320
THERMAL METRIC(1)(2)
QFN
UNITS
14 PINS
qJA
Junction-to-ambient thermal resistance
47.2
qJA
Junction-to-ambient thermal resistance(3)
32
qJCtop
Junction-to-case (top) thermal resistance
64.8
qJB
Junction-to-board thermal resistance
14.4
°C/W
yJT
Junction-to-top characterization parameter
0.5
yJB
Junction-to-board characterization parameter
14.7
qJCbot
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)
DESCRIPTION
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
mA
VIN operating – non switching supply current
VSENSE = 810 mV
600
800
mA
ENABLE AND UVLO (EN PIN)
Enable threshold
Rising
1.21
1.26
V
Enable threshold
Falling
1.10
1.17
V
Input current
EN = 1.1 V
1.15
mA
Hysteresis current
EN = 1.3 V
3.4
mA
VOLTAGE REFERENCE
Voltage reference
0 A
≤ IOUT ≤ 3 A
0.792
0.800
0.808
V
MOSFET
High-side switch resistance(1)
BOOT-PH = 3 V
77
116
m
High-side switch resistance(1)
BOOT-PH = 6 V
57
103
m
Low-side Switch Resistance(1)
VIN = 12 V
50
87
m
(1)
Measured at pins
Copyright 2010, Texas Instruments Incorporated
3
Product Folder Link(s) :TPS54320
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